Starting new pcb and copying code from last year main robot

This commit is contained in:
Ulysse Cura 2025-10-01 08:48:45 +02:00 committed by ulysse-cura
commit 8b8a83947f
45 changed files with 2102 additions and 0 deletions

97
PCB/main pcb.kicad_prl Normal file
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{
"board": {
"active_layer": 0,
"active_layer_preset": "",
"auto_track_width": true,
"hidden_netclasses": [],
"hidden_nets": [],
"high_contrast_mode": 0,
"net_color_mode": 1,
"opacity": {
"images": 0.6,
"pads": 1.0,
"shapes": 1.0,
"tracks": 1.0,
"vias": 1.0,
"zones": 0.6
},
"selection_filter": {
"dimensions": true,
"footprints": true,
"graphics": true,
"keepouts": true,
"lockedItems": false,
"otherItems": true,
"pads": true,
"text": true,
"tracks": true,
"vias": true,
"zones": true
},
"visible_items": [
"vias",
"footprint_text",
"footprint_anchors",
"ratsnest",
"grid",
"footprints_front",
"footprints_back",
"footprint_values",
"footprint_references",
"tracks",
"drc_errors",
"drawing_sheet",
"bitmaps",
"pads",
"zones",
"drc_warnings",
"locked_item_shadows",
"conflict_shadows",
"shapes"
],
"visible_layers": "ffffffff_ffffffff_ffffffff_ffffffff",
"zone_display_mode": 0
},
"git": {
"repo_type": "",
"repo_username": "",
"ssh_key": ""
},
"meta": {
"filename": "main pcb.kicad_prl",
"version": 5
},
"net_inspector_panel": {
"col_hidden": [],
"col_order": [],
"col_widths": [],
"custom_group_rules": [],
"expanded_rows": [],
"filter_by_net_name": true,
"filter_by_netclass": true,
"filter_text": "",
"group_by_constraint": false,
"group_by_netclass": false,
"show_unconnected_nets": false,
"show_zero_pad_nets": false,
"sort_ascending": true,
"sorting_column": -1
},
"open_jobsets": [],
"project": {
"files": []
},
"schematic": {
"selection_filter": {
"graphics": true,
"images": true,
"labels": true,
"lockedItems": false,
"otherItems": true,
"pins": true,
"symbols": true,
"text": true,
"wires": true
}
}
}

83
PCB/main pcb.kicad_pro Normal file
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{
"board": {
"3dviewports": [],
"design_settings": {
"defaults": {},
"diff_pair_dimensions": [],
"drc_exclusions": [],
"rules": {},
"track_widths": [],
"via_dimensions": []
},
"ipc2581": {
"dist": "",
"distpn": "",
"internal_id": "",
"mfg": "",
"mpn": ""
},
"layer_pairs": [],
"layer_presets": [],
"viewports": []
},
"boards": [],
"cvpcb": {
"equivalence_files": []
},
"libraries": {
"pinned_footprint_libs": [],
"pinned_symbol_libs": []
},
"meta": {
"filename": "main pcb.kicad_pro",
"version": 3
},
"net_settings": {
"classes": [
{
"bus_width": 12,
"clearance": 0.2,
"diff_pair_gap": 0.25,
"diff_pair_via_gap": 0.25,
"diff_pair_width": 0.2,
"line_style": 0,
"microvia_diameter": 0.3,
"microvia_drill": 0.1,
"name": "Default",
"pcb_color": "rgba(0, 0, 0, 0.000)",
"priority": 2147483647,
"schematic_color": "rgba(0, 0, 0, 0.000)",
"track_width": 0.2,
"via_diameter": 0.6,
"via_drill": 0.3,
"wire_width": 6
}
],
"meta": {
"version": 4
},
"net_colors": null,
"netclass_assignments": null,
"netclass_patterns": []
},
"pcbnew": {
"last_paths": {
"gencad": "",
"idf": "",
"netlist": "",
"plot": "",
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"step": "",
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"vrml": ""
},
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"legacy_lib_list": []
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"text_variables": {}
}

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(kicad_pcb (version 20241229) (generator "pcbnew") (generator_version "9.0")
)

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{
"board": {
"design_settings": {
"defaults": {},
"diff_pair_dimensions": [],
"drc_exclusions": [],
"rules": {},
"track_widths": [],
"via_dimensions": []
}
},
"boards": [],
"libraries": {
"pinned_footprint_libs": [],
"pinned_symbol_libs": []
},
"meta": {
"filename": "kicad.kicad_pro",
"version": 1
},
"net_settings": {
"classes": [],
"meta": {
"version": 0
}
},
"pcbnew": {
"page_layout_descr_file": ""
},
"sheets": [],
"text_variables": {}
}

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(kicad_sch
(version 20250114)
(generator "eeschema")
(generator_version "9.0")
(uuid 2b41feff-4875-412f-ac81-a28835b7fe51)
(paper "A4")
(lib_symbols)
(sheet_instances
(path "/"
(page "1")
)
)
(embedded_fonts no)
)

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{"hostname":"aspire-laptop","username":"ulysse-cura"}

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{
"env": {
"myDefaultIncludePath": [
"${workspaceFolder}/src/include/",
"${env:PICO_SDK_PATH}/src/**/include/",
"${env:PICO_SDK_PATH}/lib/**/include/",
"${workspaceFolder}/build/generated/pico_base/"
],
"myCompilerPath": "/usr/bin/arm-none-eabi-gcc"
},
"configurations": [
{
"name": "Linux",
"intelliSenseMode": "linux-gcc-arm",
"includePath": [
"${myDefaultIncludePath}"
],
"compilerPath": "/usr/bin/arm-none-eabi-gcc",
"cStandard": "c11",
"cppStandard": "c++17",
"browse": {
"path": [
"${workspaceFolder}"
],
"limitSymbolsToIncludedHeaders": true,
"databaseFilename": ""
},
"configurationProvider": "ms-vscode.cmake-tools"
}
],
"version": 4
}

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{
"files.associations": {
"*.md": "markdown",
"binary_info.h": "c",
"i2c.h": "c",
"stdlib.h": "c",
"stdint.h": "c",
"gyro.h": "c",
"motors.h": "c",
"motion_control.h": "c",
"i2c_master.h": "c",
"udp_client.h": "c",
"udp_payload.h": "c",
"udp.h": "c",
"opt.h": "c",
"cyw43_arch.h": "c",
"wifi_operator.h": "c"
}
}

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{
"tasks": [
{
"type": "shell",
"command": "cd build; cmake -DPICO_BOARD=pico_w ..; make",
"label": "CMake in build/",
"problemMatcher": [],
"group": {
"kind": "build",
"isDefault": false
}
},
{
"type": "shell",
"command": "cd build; cmake -DPICO_BOARD=pico_w ..; make Flash",
"label": "CMake & Make & Flash",
"problemMatcher": [],
"group": {
"kind": "build",
"isDefault": true
}
}
],
"version": "2.0.0"
}

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cmake_minimum_required(VERSION 3.13)
include(pico_sdk_import.cmake)
project(main_controller C CXX ASM)
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD 17)
set(PICO_EXAMPLES_PATH ${PROJECT_SOURCE_DIR})
# Définir explicitement la carte comme Pico W
set(PICO_BOARD pico_w)
if(NOT DEFINED PICO_BOARD)
add_definitions(-DPICO_BOARD=${PICO_BOARD})
endif()
pico_sdk_init()
add_executable(main_controller
src/main.c
src/robot.c
src/motors.c
src/gyro.c
src/motion_control.c
src/i2c_master.c
src/wifi_operator.c
src/udp_client.c
src/udp_payload.c
)
target_include_directories(main_controller PRIVATE
${CMAKE_CURRENT_LIST_DIR}/src
${CMAKE_CURRENT_LIST_DIR}/src/include
)
target_link_libraries(main_controller
hardware_i2c
hardware_pwm
hardware_uart
pico_stdlib
pico_cyw43_arch_lwip_poll
)
pico_enable_stdio_usb(main_controller 1)
pico_enable_stdio_uart(main_controller 1)
pico_add_extra_outputs(main_controller)
add_custom_target(Flash
DEPENDS main_controller
COMMAND sudo picotool load -f ${PROJECT_BINARY_DIR}/main_controller.uf2
)

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Motion controler code for the RPI Pico (RP2040)
===============================================
This project is the main controller firmware for the RPI Pico (RP2040), designed for the Eurobot 2025 Cup.
I2C description
-----------------------------------------------
The robots I2C communication works as follows:
* Send the device address + R/W bit (to select read or write mode).
* Send the target register address (to read from or write to).
* Read or write the register data. Multiple registers can be read/written sequentially, with the address auto-incrementing after each operation.
This code is designed to be the master in the i2c communication.
|Register |R/W|Description |Encoding |
|---------|:-:|-------------------------------|:-----------------:|
| 0x00 | W | Speed motor 1 |**-128** - **127** |
| 0x01 | W | Speed motor 2 |**-128** - **127** |
| 0x02 | W | Speed motor 3 |**-128** - **127** |
| 0x03 | W | Speed motor 4 |**-128** - **127** |
| 0x04 | W | Servo 1 position selection | **0** - **1** |
| 0x05 | W | Servo 2 position selection | **0** - **1** |
| 0x06 | W | Servo 3 position selection | **0** - **1** |
| 0x07 | W | Servo 4 position selection | **0** - **1** |
Motors communication description
-----------------------------------------------
Motors are «connected» to their respective I2C buffer address.
To control a motor you need to write data to its adress of the form :
>```C
>int8_t speed;
>```
Value goes from **-128** to **127**.
Servo motors communication description
-----------------------------------------------
Servo motors are «connected» to their respective I2C buffer address.
To control a servo motor you need to write data to its adress of the form :
>```C
>uint8_t close;
>```
Value is 0 or 1 for the open or the close pos.
Internet communication description
-----------------------------------------------
The robot main_controller is a client connected to the wireless controller which is an udp server host. A buffer is used to store data received from host.
Speed on X and Y axis are not depending of the robot orientation.
Servo motors keep the same byte address in i2c buffer and udp payload.
|Byte |Description |Encoding |
|---------|-------------------------------------------------|:-----------------:|
| 0x00-01 | Robot angle (0x00 is the last significant byte) |**-180** - **180** |
| 0x02 | Speed x axis |**-128** - **127** |
| 0x03 | Speed y axis |**-128** - **127** |
| 0x04 | Servo 1 position selection | **0** - **1** |
| 0x05 | Servo 2 position selection | **0** - **1** |
| 0x06 | Servo 3 position selection | **0** - **1** |
| 0x07 | Servo 4 position selection | **0** - **1** |
Pinout description
-----------------------------------------------
|Pin |Description |GPIO Type |
|----|----------------------------------|-----------|
| 4 | I2C Bus SDA | I2C |
| 5 | I2C Bus SCL | I2C |
Motors placement
-----------------------------------------------
,-~***~-,
/1 2\
| |
| |
| |
\3 4/
`-.....-'

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# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
include(FetchContent)
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
)
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
else ()
message(FATAL_ERROR
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
)
endif ()
endif ()
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
if (NOT EXISTS ${PICO_SDK_PATH})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif ()
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif ()
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
include(${PICO_SDK_INIT_CMAKE_FILE})

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#include "include/gyro.h"
#include <stdint.h>
#include "include/i2c_master.h"
#include "include/robot.h"
#include <stdio.h>
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Thank you Keuronde ! *
* https://git.poivron-robotique.fr/Keuronde/Holonome_2024/src/branch/Demo_2025_03/gyro_L3GD20H.c *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define SAMPLE_MIN_ELAPSED_TIME 2 // ms
#define DPS_PER_DIGIT 0.00875f
int init_gyro(void)
{
// Verify gyro initialisation
uint8_t data;
i2c_master_read_reg(I2C_GYRO_ADDRESS, 0x0F, &data, 1);
if(data != 0xd7) return -1;
// Configure gyro
const uint8_t CTRL1_REG = 0x20;
const uint8_t CTRL1_CONFIG = 0b11101111; // DR : 11 // BW : 10 // PD : 1 // Zen : 1 // Xen : 1 // Yen : 1 //
const uint8_t CONFIG[] = {CTRL1_REG, CTRL1_CONFIG};
i2c_master_write(I2C_GYRO_ADDRESS, CONFIG, 2);
uint8_t config_verification;
i2c_master_read_reg(I2C_GYRO_ADDRESS, CTRL1_REG, &config_verification, 1);
if(config_verification != config[1]) return -1;
robot.gyro_data.x_angle = 0.0f;
robot.gyro_data.y_angle = 0.0f;
robot.gyro_data.z_angle = 0.0f;
sleep_ms(1000);
return 0;
}
static inline void __attribute__((always_inline)) gyro_read(int16_t *x, int16_t *y, int16_t *z)
{
const uint8_t X_OUT_L_REG = 0x28;
uint8_t data[6];
i2c_master_read_reg(I2C_GYRO_ADDRESS, X_OUT_L_REG | 0x80, data, 6); // 0x80 for auto incrementing
*x = (int16_t)((data[1] << 8) | data[0]);
*y = (int16_t)((data[3] << 8) | data[2]);
*z = (int16_t)((data[5] << 8) | data[4]);
}
void gyro_calibrate(void)
{
const uint nb_samples = 1000;
int16_t x, y, z;
int32_t x_sum = 0, y_sum = 0, z_sum = 0;
for(uint i = 0; i < nb_samples; i++)
{
gyro_read(&x, &y, &z);
x_sum += x;
y_sum += y;
z_sum += z;
sleep_ms(SAMPLE_MIN_ELAPSED_TIME);
//printf(">cal_x:%d\n", x);
//printf(">cal_y:%d\n", y);
//printf(">cal_z:%d\n", z);
}
robot.gyro_data.x_offset = (float)x_sum / (float)nb_samples * DPS_PER_DIGIT;
robot.gyro_data.y_offset = (float)y_sum / (float)nb_samples * DPS_PER_DIGIT;
robot.gyro_data.z_offset = (float)z_sum / (float)nb_samples * DPS_PER_DIGIT;
//printf("\nx_cal:%.5f\n", robot.gyro_data.x_offset);
//printf("\ny_cal:%.5f\n", robot.gyro_data.y_offset);
//printf("\nz_cal:%.5f\n", robot.gyro_data.z_offset);
}
static inline void __attribute__((always_inline)) gyro_get_dps(double* x_dps, double* y_dps, double* z_dps)
{
int16_t x, y, z;
gyro_read(&x, &y, &z);
*x_dps = x * DPS_PER_DIGIT;
*y_dps = y * DPS_PER_DIGIT;
*z_dps = z * DPS_PER_DIGIT;
//printf(">x_dps:%f\n", *x_dps);
//printf(">y_dps:%f\n", *y_dps);
//printf(">z_dps:%f\n", *z_dps);
}
void gyro_update(void)
{
static double elapsed_since_sample_ms = 10.0;
elapsed_since_sample_ms += robot.delta_time_ms;
if(elapsed_since_sample_ms >= SAMPLE_MIN_ELAPSED_TIME)
{
double x_dps, y_dps, z_dps;
gyro_get_dps(&x_dps, &y_dps, &z_dps);
x_dps -= robot.gyro_data.x_offset;
y_dps -= robot.gyro_data.y_offset;
z_dps -= robot.gyro_data.z_offset;
robot.gyro_data.x_angle += x_dps * elapsed_since_sample_ms / 1000.0f;
robot.gyro_data.y_angle += y_dps * elapsed_since_sample_ms / 1000.0f;
robot.gyro_data.z_angle += z_dps * elapsed_since_sample_ms / 1000.0f;
while(robot.gyro_data.x_angle > 180) robot.gyro_data.x_angle -= 360;
while(robot.gyro_data.x_angle < -180) robot.gyro_data.x_angle += 360;
while(robot.gyro_data.y_angle > 180) robot.gyro_data.y_angle -= 360;
while(robot.gyro_data.y_angle < -180) robot.gyro_data.y_angle += 360;
while(robot.gyro_data.z_angle > 180) robot.gyro_data.z_angle -= 360;
while(robot.gyro_data.z_angle < -180) robot.gyro_data.z_angle += 360;
//printf(">gyro_x_angle:%f\n", robot.gyro_data.x_angle);
//printf(">gyro_y_angle:%f\n", robot.gyro_data.y_angle);
//printf(">gyro_z_angle:%f\n", robot.gyro_data.z_angle);
elapsed_since_sample_ms = 0.0;
}
}

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#include "include/i2c_master.h"
#include <pico/stdlib.h>
#include <hardware/i2c.h>
void i2c_master_init(void)
{
gpio_set_function(I2C_MASTER_SDA_PIN, GPIO_FUNC_I2C);
gpio_set_function(I2C_MASTER_SCL_PIN, GPIO_FUNC_I2C);
gpio_pull_up(I2C_MASTER_SDA_PIN);
gpio_pull_up(I2C_MASTER_SCL_PIN);
i2c_init(I2C_MASTER_INSTANCE, I2C_MASTER_BAUD_RATE);
}
void i2c_master_deinit(void)
{
i2c_deinit(I2C_MASTER_INSTANCE);
}
inline void i2c_master_write(uint8_t address, const uint8_t *src, size_t len)
{
i2c_write_blocking(I2C_MASTER_INSTANCE, address, src, len, false);
}
inline void i2c_master_read(uint8_t address, uint8_t *dst, size_t len)
{
i2c_read_blocking(I2C_MASTER_INSTANCE, address, dst, len, false);
}
inline void i2c_master_read_reg(uint8_t address, uint8_t reg, uint8_t *dst, size_t len)
{
i2c_master_write(address, &reg, 1);
i2c_master_read(address, dst, len);
}

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#ifndef GYRO_H
#define GYRO_H
#define I2C_GYRO_ADDRESS 0x6b
typedef struct gyro_data_t {
float x_offset, y_offset, z_offset;
float x_angle, y_angle, z_angle;
} gyro_data_t;
// Check if gyro has correctly initialised and configure it for simple use
int init_gyro(void);
// Calibrate gyro
void gyro_calibrate(void);
// Update gyro data
void gyro_update(void);
#endif // GYRO_H

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#ifndef I2C_MASTER_H
#define I2C_MASTER_H
#include <hardware/i2c.h>
#define I2C_MASTER_SDA_PIN 4
#define I2C_MASTER_SCL_PIN 5
#define I2C_MASTER_INSTANCE i2c0
#define I2C_MASTER_BAUD_RATE 300 * 1000
// Init master i2c
void i2c_master_init(void);
// Deinit master i2c
void i2c_master_deinit(void);
// Send [src] of [len] to [address] and close communication
void i2c_master_write(uint8_t address, const uint8_t *src, size_t len);
// Receive [dst] of [len] from [address] and close communication
void i2c_master_read(uint8_t address, uint8_t *dst, size_t len);
// Send [reg] and receive data in [dst] and close communition
void i2c_master_read_reg(uint8_t address, uint8_t reg, uint8_t *dst, size_t len);
#endif // I2C_MASTER_H

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#ifndef _LWIPOPTS_EXAMPLE_COMMONH_H
#define _LWIPOPTS_EXAMPLE_COMMONH_H
// Common settings used in most of the pico_w examples
// (see https://www.nongnu.org/lwip/2_1_x/group__lwip__opts.html for details)
// allow override in some examples
#ifndef NO_SYS
#define NO_SYS 1
#endif
// allow override in some examples
#ifndef LWIP_SOCKET
#define LWIP_SOCKET 0
#endif
#if PICO_CYW43_ARCH_POLL
#define MEM_LIBC_MALLOC 1
#else
// MEM_LIBC_MALLOC is incompatible with non polling versions
#define MEM_LIBC_MALLOC 0
#endif
#define MEM_ALIGNMENT 4
#ifndef MEM_SIZE
#define MEM_SIZE 32768 // Augmenté pour plus de mémoire disponible
#endif
#define MEMP_NUM_TCP_SEG 32
#define MEMP_NUM_ARP_QUEUE 10
#define PBUF_POOL_SIZE 32 // Augmenté pour réduire les allocations
#define LWIP_ARP 1
#define LWIP_ETHERNET 1
#define LWIP_ICMP 1
#define LWIP_RAW 1
#define TCP_WND (16 * TCP_MSS) // Augmenté pour de meilleures performances
#define TCP_MSS 1460
#define TCP_SND_BUF (8 * TCP_MSS) // Augmenté pour de meilleures performances
#define TCP_SND_QUEUELEN ((4 * (TCP_SND_BUF) + (TCP_MSS - 1)) / (TCP_MSS))
#define LWIP_NETIF_STATUS_CALLBACK 1
#define LWIP_NETIF_LINK_CALLBACK 1
#define LWIP_NETIF_HOSTNAME 1
#define LWIP_NETCONN 0
#define MEM_STATS 0
#define SYS_STATS 0
#define MEMP_STATS 0
#define LINK_STATS 0
// #define ETH_PAD_SIZE 2
#define LWIP_CHKSUM_ALGORITHM 3
#define LWIP_DHCP 0
#define LWIP_DHCP_SERVER 0
#define LWIP_IPV4 1
#define LWIP_TCP 1
#define LWIP_UDP 1
#define LWIP_DNS 1
#define LWIP_TCP_KEEPALIVE 1
#define LWIP_NETIF_TX_SINGLE_PBUF 1
#define DHCP_DOES_ARP_CHECK 0
#define LWIP_DHCP_DOES_ACD_CHECK 0
#ifndef NDEBUG
#define LWIP_DEBUG 1
#define LWIP_STATS 1
#define LWIP_STATS_DISPLAY 1
#endif
#define ETHARP_DEBUG LWIP_DBG_OFF
#define NETIF_DEBUG LWIP_DBG_OFF
#define PBUF_DEBUG LWIP_DBG_OFF
#define API_LIB_DEBUG LWIP_DBG_OFF
#define API_MSG_DEBUG LWIP_DBG_OFF
#define SOCKETS_DEBUG LWIP_DBG_OFF
#define ICMP_DEBUG LWIP_DBG_OFF
#define INET_DEBUG LWIP_DBG_OFF
#define IP_DEBUG LWIP_DBG_OFF
#define IP_REASS_DEBUG LWIP_DBG_OFF
#define RAW_DEBUG LWIP_DBG_OFF
#define MEM_DEBUG LWIP_DBG_OFF
#define MEMP_DEBUG LWIP_DBG_OFF
#define SYS_DEBUG LWIP_DBG_OFF
#define TCP_DEBUG LWIP_DBG_OFF
#define TCP_INPUT_DEBUG LWIP_DBG_OFF
#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
#define TCP_RTO_DEBUG LWIP_DBG_OFF
#define TCP_CWND_DEBUG LWIP_DBG_OFF
#define TCP_WND_DEBUG LWIP_DBG_OFF
#define TCP_FR_DEBUG LWIP_DBG_OFF
#define TCP_QLEN_DEBUG LWIP_DBG_OFF
#define TCP_RST_DEBUG LWIP_DBG_OFF
#define UDP_DEBUG LWIP_DBG_OFF
#define TCPIP_DEBUG LWIP_DBG_OFF
#define PPP_DEBUG LWIP_DBG_OFF
#define SLIP_DEBUG LWIP_DBG_OFF
#define DHCP_DEBUG LWIP_DBG_OFF
#define SYS_LIGHTWEIGHT_PROT 1 // Protection pour le multicore
#define MEMP_NUM_PBUF 32 // Augmenté pour les buffers
#define ICMP_TTL 255 // Augmenté pour la fiabilité
#endif /* __LWIPOPTS_H__ */

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#ifndef MOTION_CONTROL_H
#define MOTION_CONTROL_H
#include <stdint.h>
#include "motors.h"
typedef struct motion_control_data_t {
int16_t angle;
int8_t x_axis_speed;
int8_t y_axis_speed;
uint8_t servo_motors_pos[NB_SERVO_MOTORS];
} motion_control_data_t;
// Init values for motion control
void init_motion_control(void);
// Update motion control buffer from motion control data and gyro data
void i2c_update_motion_control(void);
// Update servo motors from motion control data
void i2c_update_servo_motors(void);
#endif // MOTION_CONTROL_H

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#ifndef MOTORS_H
#define MOTORS_H
#include <pico/types.h>
#define I2C_MOTION_CONTROLLER_ADDRESS 0x09
// Motors
typedef enum motors_enum_t {
MOTOR1,
MOTOR2,
MOTOR3,
MOTOR4,
NB_MOTORS
} motors_enum_t;
typedef struct motor_def_t {
uint pwm_pin;
uint dir1_pin;
uint dir2_pin;
uint8_t buffer_reg;
} motor_def_t;
extern const motor_def_t MOTORS_DEFS[];
// Servo Motors
typedef enum {
SERVO_MOTOR1,
SERVO_MOTOR2,
SERVO_MOTOR3,
SERVO_MOTOR4,
NB_SERVO_MOTORS
} servo_motors_enum_t;
typedef struct {
uint pwm_pin;
uint open_pos;
uint close_pos;
uint8_t buffer_reg_and_payload_byte;
} servo_motor_def_t;
extern const servo_motor_def_t SERVO_MOTORS_DEFS[];
// Send [motor] to [value] through i2c to motion controller
void i2c_set_motor(motors_enum_t motor, int8_t value);
// Get [motor] speed from motion controller through i2c
int8_t i2c_get_motor(motors_enum_t motor);
// Set [servo motor] to [value] through i2c
void i2c_set_servo_motor(servo_motors_enum_t servo_motor, uint8_t value);
// Get [servo motor] value from i2c
uint8_t i2c_get_servo_motor(servo_motors_enum_t servo_motor);
#endif // MOTORS_H

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#ifndef ROBOT_H
#define ROBOT_H
#include <stdbool.h>
#include "gyro.h"
#include "motion_control.h"
typedef struct robot_t {
gyro_data_t gyro_data;
motion_control_data_t motion_control_data;
bool is_running;
double delta_time_ms;
} robot_t;
extern robot_t robot;
// Init all robot's components
int robot_init(void);
// Handle inputs and outputs
void robot_handle_inputs_outputs(void);
// Deinit all robot's components
void robot_deinit(void);
#endif // ROBOT_H

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#ifndef UDP_CLIENT_H
#define UDP_CLIENT_H
#include <stdint.h>
#include <lwip/udp.h>
#define UDP_CLIENT_PORT 4243
#define BUFFER_SIZE 1024
// Message callback deffinition
typedef void (*message_callback_t)(uint8_t *payload, uint16_t len, const ip_addr_t *addr, uint16_t port);
// Data in here is used by the hardware
typedef struct udp_client_t {
struct udp_pcb *pcb; // Like this
ip_addr_t local_addr; // Or this
uint16_t local_port; // So don't remove them, even if they are not used explicitely in the program
uint8_t recv_buffer[BUFFER_SIZE]; // Please (Not even change their position)
message_callback_t message_callback;
} udp_client_t;
// Init udp client, set callback to NULL for the default callback
void udp_client_init(void);
// Exit udp client
void udp_client_exit(void);
#endif // UDP_CLIENT_H

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#ifndef UDP_BUFFER_H
#define UDP_BUFFER_H
#include <pico.h>
#include <stdint.h>
#include <lwip/udp.h>
#define UDP_PAYLOAD_ANGLE_L_BYTE 0x00
#define UDP_PAYLOAD_ANGLE_H_BYTE 0x01
#define UDP_PAYLOAD_X_AXIS_SPEED_BYTE 0x02
#define UDP_PAYLOAD_Y_AXIS_SPEED_BYTE 0x03
// Callback function for writing data when udp package received
void __not_in_flash_func(udp_client_message_handler)(uint8_t *payload, uint16_t len, const ip_addr_t *addr, u16_t port);
#endif // UDP_BUFFER_H

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#ifndef WIFI_OPERATOR_H
#define WIFI_OPERATOR_H
#define WIFI_OPERATOR_SSID "RiombotiqueAP"
#define WIFI_OPERATOR_PASSWORD "x4ptSLpPuJFcpzbLEhDoZ5J7dz"
void wifi_operator_init(void);
#endif // WIFI_OPERATOR_H

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/* *\
Copyrights 2025
Riombotique
\* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Code du RPI Pico principale gérant les differentes entrées-sorties. *
* Ce Pico est un maitre pilotant le gyroscope, l'internet et le motion controller.*
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "include/robot.h"
robot_t robot;
int main(void)
{
if(robot_init()) return -1;
while(robot.is_running)
{
robot_handle_inputs_outputs();
}
robot_deinit();
return 0;
}

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#include "include/motion_control.h"
#include <stdio.h>
#include <math.h>
#include "include/motors.h"
#include "include/robot.h"
#define GAIN_KD 10
void init_motion_control(void)
{
robot.motion_control_data.angle = 0;
robot.motion_control_data.x_axis_speed = 0;
robot.motion_control_data.y_axis_speed = 0;
}
void i2c_update_motion_control(void)
{
// Motion control work as follow :
// - Motors are rotated on-board at 45*.
// - we calculate the error of the targeted angle and the actual angle
// - First we estimate the targeted speed on irl board on X and Y axis
// - Then we calculate motors speed from targeted speed and the error
// - And we put limits because motors speed are send by i2c on 1 byte
float actual_angle = robot.gyro_data.x_angle - 45.0f;
float target_angle = (float)robot.motion_control_data.angle - 45.0f;
float target_angle_radian = target_angle / 180.0f * M_PI;
float error = target_angle - actual_angle;
if(error > 180) error -= 360;
if(error < -180) error += 360;
float correction = error * GAIN_KD;
float target_x_axis_speed = cosf(target_angle_radian) * robot.motion_control_data.x_axis_speed +
sinf(target_angle_radian) * robot.motion_control_data.y_axis_speed;
float target_y_axis_speed = cosf(target_angle_radian) * robot.motion_control_data.y_axis_speed -
sinf(target_angle_radian) * robot.motion_control_data.x_axis_speed;
int motor1_speed = target_x_axis_speed + (int)correction;
int motor2_speed = target_x_axis_speed - (int)correction;
int motor3_speed = target_y_axis_speed + (int)correction;
int motor4_speed = target_y_axis_speed - (int)correction;
if(motor1_speed > 127) motor1_speed = 127;
if(motor2_speed > 127) motor2_speed = 127;
if(motor3_speed > 127) motor3_speed = 127;
if(motor4_speed > 127) motor4_speed = 127;
if(motor1_speed < -128) motor1_speed = -128;
if(motor2_speed < -128) motor2_speed = -128;
if(motor3_speed < -128) motor3_speed = -128;
if(motor4_speed < -128) motor4_speed = -128;
i2c_set_motor(MOTOR1, motor1_speed);
i2c_set_motor(MOTOR2, motor2_speed);
i2c_set_motor(MOTOR3, motor3_speed);
i2c_set_motor(MOTOR4, motor4_speed);
}
void i2c_update_servo_motors(void)
{
for(servo_motors_enum_t actual_servo_motor = SERVO_MOTOR1; actual_servo_motor < NB_SERVO_MOTORS; actual_servo_motor++)
i2c_set_servo_motor(actual_servo_motor, robot.motion_control_data.servo_motors_pos[actual_servo_motor]);
}

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#include "include/motors.h"
#include <stdlib.h>
#include "include/i2c_master.h"
const motor_def_t MOTORS_DEFS[] = {
{0, 4, 5, 0x00},
{1, 6, 7, 0x01},
{2, 8, 9, 0x02},
{3, 10, 11, 0x03},
};
const servo_motor_def_t SERVO_MOTORS_DEFS[] = {
{12, 0, 25000, 0x04},
{13, 0, 25000, 0x05},
{14, 0, 25000, 0x06},
{15, 0, 25000, 0x07},
};
void i2c_set_motor(motors_enum_t motor, int8_t value)
{
const motor_def_t *MOTOR_DEF = &MOTORS_DEFS[motor];
uint8_t x = *(uint8_t *)&value;
uint8_t data[] = {MOTOR_DEF->buffer_reg, x};
i2c_master_write(I2C_MOTION_CONTROLLER_ADDRESS, data, 2);
}
int8_t i2c_get_motor(motors_enum_t motor)
{
const motor_def_t *MOTOR_DEF = &MOTORS_DEFS[motor];
uint8_t data;
i2c_master_read_reg(I2C_MOTION_CONTROLLER_ADDRESS, MOTOR_DEF->buffer_reg, &data, 1);
int8_t value = *(int8_t *)&data;
return value;
}
void i2c_set_servo_motor(servo_motors_enum_t servo_motor, uint8_t value)
{
const servo_motor_def_t *SERVO_MOTOR_DEF = &SERVO_MOTORS_DEFS[servo_motor];
uint8_t data[] = {SERVO_MOTOR_DEF->buffer_reg_and_payload_byte, value};
i2c_master_write(I2C_MOTION_CONTROLLER_ADDRESS, data, 2);
}
uint8_t i2c_get_servo_motor(servo_motors_enum_t servo_motor)
{
const servo_motor_def_t *servo_motor_def = &SERVO_MOTORS_DEFS[servo_motor];
uint8_t value;
i2c_master_read_reg(I2C_MOTION_CONTROLLER_ADDRESS, servo_motor_def->buffer_reg_and_payload_byte, &value, 1);
return value;
}

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#include "include/robot.h"
#include <pico/stdlib.h>
#include <pico/cyw43_arch.h>
#include <time.h>
#include <pico/mutex.h>
#include "include/i2c_master.h"
#include "include/udp_client.h"
#include "include/wifi_operator.h"
//#include "include/udp_fake_client.h"
auto_init_mutex(wifi_mutex);
int robot_init(void)
{
stdio_init_all();
if(cyw43_arch_init())
{
return -1;
}
cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
wifi_operator_init();
udp_client_init();
i2c_master_init();
if(init_gyro()) return -1;
gyro_calibrate();
init_motion_control();
robot.is_running = true;
return 0;
}
static inline void update_time(void)
{
static bool led_state = false;
static double last_time = 0.0;
double start_time = (double)clock() * 1000.0 / (double)CLOCKS_PER_SEC;
robot.delta_time_ms = start_time - last_time;
last_time = start_time;
static double elapsed_time = 0.0;
elapsed_time += robot.delta_time_ms;
if(elapsed_time >= 1000)
{
elapsed_time = 0;
mutex_enter_blocking(&wifi_mutex);
cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, led_state);
mutex_exit(&wifi_mutex);
led_state = !led_state;
}
}
void robot_handle_inputs_outputs(void)
{
mutex_enter_blocking(&wifi_mutex);
cyw43_arch_poll();
mutex_exit(&wifi_mutex);
update_time();
gyro_update();
i2c_update_motion_control();
i2c_update_servo_motors();
tight_loop_contents();
}
void robot_deinit(void)
{
//udp_client_exit();
i2c_master_deinit();
}

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#include "include/udp_client.h"
#include <stdio.h>
#include "include/udp_payload.h"
udp_client_t udp_client;
static inline void __not_in_flash_func(handle_receive)(struct pbuf *p, const ip_addr_t *addr, u16_t port)
{
if(p->len >= 2)
{
uint8_t *payload = (uint8_t *)p->payload;
uint16_t len = p->len;
udp_client.message_callback(payload, len, addr, port);
}
pbuf_free(p);
}
static void __not_in_flash_func(udp_receive_callback)(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
{
udp_client_t *udp_client_received_data = (udp_client_t *)arg;
handle_receive(p, addr, port);
}
// Default callback func
static void __not_in_flash_func(default_message_callback)(uint8_t *payload, uint16_t len, const ip_addr_t *addr, uint16_t port)
{
//printf("Received: len=%d from %s:%d\n", len, ipaddr_ntoa(addr), port);
//for(uint i = 0; i < len; i++) printf("payload[%d]=%d | ", i, payload[i]);
//puts("\n");
printf(">Robot angle : %d\n", (int16_t)((payload[UDP_PAYLOAD_ANGLE_H_BYTE] << 8) | payload[UDP_PAYLOAD_ANGLE_L_BYTE]));
printf(">Robot x speed : %d\n", (int8_t)payload[UDP_PAYLOAD_X_AXIS_SPEED_BYTE]);
printf(">Robot y speed : %d\n", (int8_t)payload[UDP_PAYLOAD_Y_AXIS_SPEED_BYTE]);
}
void udp_client_init(void)
{
//udp_client.message_callback = udp_client_message_handler;
udp_client.message_callback = default_message_callback;
udp_client.pcb = udp_new();
if(udp_client.pcb == NULL)
{
puts("Error creating UDP client");
return;
}
udp_recv(udp_client.pcb, udp_receive_callback, &udp_client);
err_t err = udp_bind(udp_client.pcb, IP_ADDR_ANY, UDP_CLIENT_PORT);
if(err != ERR_OK)
{
printf("Erreur bind UDP client: %d\n", err);
return;
}
printf("UDP client started on port %d\n", UDP_CLIENT_PORT);
}
void udp_client_exit(void)
{
if(udp_client.pcb)
{
udp_remove(udp_client.pcb);
udp_client.pcb = NULL;
}
}

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#include "include/udp_payload.h"
#include "include/motors.h"
#include "include/robot.h"
void __not_in_flash_func(udp_client_message_handler)(uint8_t *payload, uint16_t len, const ip_addr_t *addr, u16_t port)
{
if(len != 16) return;
robot.motion_control_data.angle = ((payload[UDP_PAYLOAD_ANGLE_H_BYTE] << 8) | payload[UDP_PAYLOAD_ANGLE_L_BYTE]);
robot.motion_control_data.x_axis_speed = payload[UDP_PAYLOAD_X_AXIS_SPEED_BYTE];
robot.motion_control_data.y_axis_speed = payload[UDP_PAYLOAD_Y_AXIS_SPEED_BYTE];
for(servo_motors_enum_t actual_servo_motor = SERVO_MOTOR1; actual_servo_motor < NB_SERVO_MOTORS; actual_servo_motor++)
{
const servo_motor_def_t *SERVO_MOTOR_DEF = &SERVO_MOTORS_DEFS[actual_servo_motor];
robot.motion_control_data.servo_motors_pos[actual_servo_motor] = payload[SERVO_MOTOR_DEF->buffer_reg_and_payload_byte];
}
}

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#include "include/wifi_operator.h"
#include <stdio.h>
#include <pico/cyw43_arch.h>
#include <lwip/netif.h>
#include <lwip/ip4_addr.h>
void wifi_operator_init(void)
{
// Mode client
cyw43_arch_enable_sta_mode();
// Désactiver le mode d'économie d'énergie
cyw43_wifi_pm(&cyw43_state, CYW43_NO_POWERSAVE_MODE);
// Afficher les paramètres de connexion
printf("Tentative de connexion à: SSID='%s'\n", WIFI_OPERATOR_SSID);
// Configuration IP
ip4_addr_t ip, netmask, gateway;
IP4_ADDR(&ip, 192, 168, 128, 2);
IP4_ADDR(&netmask, 255, 255, 255, 0);
IP4_ADDR(&gateway, 192, 168, 128, 1);
// Configuration réseau avant connexion
netif_set_up(netif_default);
netif_set_addr(netif_default, &ip, &netmask, &gateway);
puts("Configuration IP effectuée");
int connection_return = 1;
// Tentativs de connexion
do
{
puts("Tentative de connexion au réseau Wi-Fi...");
connection_return = cyw43_arch_wifi_connect_timeout_ms(WIFI_OPERATOR_SSID, WIFI_OPERATOR_PASSWORD, CYW43_AUTH_WPA2_AES_PSK, 10000);
if(connection_return)
{
const char *error_description;
switch(connection_return)
{
case -1:
error_description = "General error";
break;
case -2:
error_description = "Point d'accès non trouvé";
break;
case -3:
error_description = "Incorrect password";
break;
default:
error_description = "Unknow error";
}
printf("Error: WiFi can't be connected - Error code: %d - %s\n", connection_return, error_description);
}
}
while(connection_return);
// Configuration de l'interface réseau
if(!netif_default)
{
puts("Error: WiFi interface isn't accessible");
return;
}
netif_set_up(netif_default);
netif_set_link_up(netif_default);
netif_set_addr(netif_default, &ip, &netmask, &gateway);
puts("Connexion successfully etablished !");
}

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{
"env": {
"myDefaultIncludePath": [
"${env:PICO_SDK_PATH}/src/**/include/",
"${workspaceFolder}/build/generated/pico_base/"
],
"myCompilerPath": "/usr/bin/arm-none-eabi-gcc"
},
"configurations": [
{
"name": "Linux",
"intelliSenseMode": "linux-gcc-arm",
"includePath": [
"${myDefaultIncludePath}",
"${workspaceFolder}/build/"
],
"compilerPath": "/usr/bin/arm-none-eabi-gcc",
"cStandard": "c11",
"cppStandard": "c++17",
"browse": {
"path": [
"${workspaceFolder}"
],
"limitSymbolsToIncludedHeaders": true,
"databaseFilename": ""
},
"configurationProvider": "ms-vscode.cmake-tools"
}
],
"version": 4
}

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{
"files.associations": {
"*.md": "markdown",
"binary_info.h": "c",
"i2c.h": "c",
"time.h": "c",
"stdlib.h": "c",
"robot.h": "c",
"stdio.h": "c",
"i2c_buffer.h": "c",
"motors.h": "c"
}
}

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{
"tasks": [
{
"type": "shell",
"command": "cd build; cmake ../; make",
"label": "CMake in build/",
"problemMatcher": [],
"group": {
"kind": "build",
"isDefault": false
}
},
{
"type": "shell",
"command": "cd build; cmake ../; make Flash",
"label": "CMake & Make & Flash",
"problemMatcher": [],
"group": {
"kind": "build",
"isDefault": true
}
}
],
"version": "2.0.0"
}

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cmake_minimum_required(VERSION 3.13)
include(pico_sdk_import.cmake)
project(motion_controller C CXX ASM)
set(CMAKE_C_STNDARD 11)
set(CMAKE_CXX_STANDARD 17)
set(PICO_EXAMPLES_PATH ${PROJECT_SOURCE_DIR})
pico_sdk_init()
add_executable(motion_controller
src/main.c
src/robot.c
src/motors.c
src/i2c_slave.c
src/i2c_buffer.c
)
target_link_libraries(motion_controller
hardware_i2c
hardware_pwm
hardware_uart
pico_stdlib
)
pico_enable_stdio_usb(motion_controller 1)
pico_enable_stdio_uart(motion_controller 1)
pico_add_extra_outputs(motion_controller)
add_custom_target(Flash
DEPENDS motion_controller
COMMAND sudo picotool load -f ${PROJECT_BINARY_DIR}/motion_controller.uf2
)

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Motion controler code for the RPI Pico (RP2040)
===============================================
This project is a motion controller firmware for the RPI Pico (RP2040), designed for plug-and-play use with modular code and a clear architecture.
I2C description
-----------------------------------------------
The robots I2C communication works as follows:
* Send the device address + R/W bit (to select read or write mode).
* Send the target register address (to read from or write to).
* Read or write the register data. Multiple registers can be read/written sequentially, with the address auto-incrementing after each operation.
This firmware is coded to be a slave when adressed. Its address is **0x09** which you can change if there is any conflict whit other hardware.
|Adress |R/W|Description |Encoding |
|-------|:-:|-------------------------------|:-----------------:|
| 0x00 | W | Speed motor 1 |**-128** - **127** |
| 0x01 | W | Speed motor 2 |**-128** - **127** |
| 0x02 | W | Speed motor 3 |**-128** - **127** |
| 0x03 | W | Speed motor 4 |**-128** - **127** |
| 0x04 | W | Servo 1 position selection | **0** - **1** |
| 0x05 | W | Servo 2 position selection | **0** - **1** |
| 0x06 | W | Servo 3 position selection | **0** - **1** |
| 0x07 | W | Servo 4 position selection | **0** - **1** |
Motors communication description
-----------------------------------------------
Motors are «connected» to their respective I2C buffer address.
To control a motor you need to write data to its adress of the form :
>```C
>int8_t speed;
>```
Value goes from **-128** to **127**.
Servo motors communication description
-----------------------------------------------
Servo motors are «connected» to their respective I2C buffer address.
To control a servo motor you need to write data to its adress of the form :
>```C
>uint8_t close;
>```
Value is 0 or 1 for the open pos or the close pos.
Pinout description
-----------------------------------------------
|Pin |Description |GPIO Type |
|----|----------------------------------|-----------|
| 0 | Motor1 Speed | PWM |
| 1 | Motor2 Speed | PWM |
| 2 | Motor3 Speed | PWM |
| 3 | Motor4 Speed | PWM |
| 4 | Motor1 Dir1 | OUTPUT |
| 5 | Motor1 Dir2 | OUTPUT |
| 6 | Motor2 Dir1 | OUTPUT |
| 7 | Motor2 Dir2 | OUTPUT |
| 8 | Motor3 Dir1 | OUTPUT |
| 9 | Motor3 Dir2 | OUTPUT |
| 10 | Motor4 Dir1 | OUTPUT |
| 11 | Motor5 Dir2 | OUTPUT |
| 12 | Servo1 Angle | PWM |
| 13 | Servo2 Angle | PWM |
| 14 | Servo3 Angle | PWM |
| 15 | Servo4 Angle | PWM |
| 21 | I2C Bus SDA | I2C |
| 20 | I2C Bus SCL | I2C |

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# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
include(FetchContent)
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
)
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
else ()
message(FATAL_ERROR
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
)
endif ()
endif ()
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
if (NOT EXISTS ${PICO_SDK_PATH})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif ()
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif ()
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
include(${PICO_SDK_INIT_CMAKE_FILE})

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#include "include/i2c_buffer.h"
#include "include/robot.h"
#include "include/motors.h"
void __not_in_flash_func(i2c_slave_buffer_handler)(i2c_slave_event_t event)
{
switch(event)
{
case I2C_SLAVE_RECEIVE: // master has written some data
if(!robot.i2c_buffer.buffer_reg_written)
{
// writes always start with the memory address
robot.i2c_buffer.buffer_reg = i2c_slave_read_byte();
robot.i2c_buffer.buffer_reg_written = true;
}
else
{
// save into memory
robot.i2c_buffer.buffer[robot.i2c_buffer.buffer_reg] = i2c_slave_read_byte();
robot.i2c_buffer.buffer_reg++;
}
break;
case I2C_SLAVE_REQUEST: // master is requesting data
// load from memory
i2c_slave_write_byte(robot.i2c_buffer.buffer[robot.i2c_buffer.buffer_reg]);
robot.i2c_buffer.buffer_reg++;
break;
case I2C_SLAVE_FINISH: // master has signalled Stop / Restart
robot.i2c_buffer.buffer_reg_written = false;
break;
default:
break;
}
}
void update_motors_from_buffer(void)
{
for(motors_enum_t actual_motor = MOTOR1; actual_motor < NB_MOTORS; actual_motor++)
{
const motor_def_t *motor_def = &MOTORS_DEFS[actual_motor];
motor_set(actual_motor, robot.i2c_buffer.buffer[motor_def->buffer_reg]);
}
}
void update_servo_motors_from_buffer(void)
{
for(servo_motors_enum_t actual_servo_motor = SERVO_MOTOR1; actual_servo_motor < NB_SERVO_MOTORS; actual_servo_motor++)
{
const servo_motor_def_t *servo_motor_def = &SERVO_MOTORS_DEFS[actual_servo_motor];
servo_motor_set(actual_servo_motor, robot.i2c_buffer.buffer[servo_motor_def->buffer_reg]);
}
}

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/*
* Copyright (c) 2021 Valentin Milea <valentin.milea@gmail.com>
*
* SPDX-License-Identifier: MIT
*/
#include "include/i2c_slave.h"
#include <pico/stdlib.h>
#include <hardware/irq.h>
#include "include/i2c_buffer.h"
static bool transfer_in_progress;
static inline void finish_transfer(void)
{
if(transfer_in_progress)
{
i2c_slave_buffer_handler(I2C_SLAVE_FINISH);
transfer_in_progress = false;
}
}
static void __not_in_flash_func(i2c_slave_irq_handler)(void)
{
i2c_hw_t *hw = i2c_get_hw(I2C_SLAVE_INSTANCE);
uint32_t intr_stat = hw->intr_stat;
if(intr_stat == 0)
{
return;
}
if(intr_stat & I2C_IC_INTR_STAT_R_TX_ABRT_BITS)
{
hw->clr_tx_abrt;
finish_transfer();
}
if(intr_stat & I2C_IC_INTR_STAT_R_START_DET_BITS)
{
hw->clr_start_det;
finish_transfer();
}
if(intr_stat & I2C_IC_INTR_STAT_R_STOP_DET_BITS)
{
hw->clr_stop_det;
finish_transfer();
}
if(intr_stat & I2C_IC_INTR_STAT_R_RX_FULL_BITS)
{
transfer_in_progress = true;
i2c_slave_buffer_handler(I2C_SLAVE_RECEIVE);
}
if(intr_stat & I2C_IC_INTR_STAT_R_RD_REQ_BITS)
{
hw->clr_rd_req;
transfer_in_progress = true;
i2c_slave_buffer_handler(I2C_SLAVE_REQUEST);
}
}
void i2c_slave_init(void)
{
// Init GPIO pins
gpio_set_function(I2C_SLAVE_SDA_PIN, GPIO_FUNC_I2C);
gpio_set_function(I2C_SLAVE_SCL_PIN, GPIO_FUNC_I2C);
// Note: The I2C slave does clock stretching implicitly after a RD_REQ, while the Tx FIFO is empty.
// There is also an option to enable clock stretching while the Rx FIFO is full, but we leave it
// disabled since the Rx FIFO should never fill up (unless i2c_slave.handler() is way too slow).
i2c_set_slave_mode(I2C_SLAVE_INSTANCE, true, I2C_SLAVE_ADDRESS);
i2c_hw_t *hw = i2c_get_hw(I2C_SLAVE_INSTANCE);
// unmask necessary interrupts
hw->intr_mask = I2C_IC_INTR_MASK_M_RX_FULL_BITS | I2C_IC_INTR_MASK_M_RD_REQ_BITS | I2C_IC_RAW_INTR_STAT_TX_ABRT_BITS | I2C_IC_INTR_MASK_M_STOP_DET_BITS | I2C_IC_INTR_MASK_M_START_DET_BITS;
// enable interrupt for current core
uint num = I2C0_IRQ + i2c_get_index(I2C_SLAVE_INSTANCE);
irq_set_exclusive_handler(num, i2c_slave_irq_handler);
irq_set_enabled(num, true);
}
void i2c_slave_deinit(void)
{
uint num = I2C0_IRQ + i2c_get_index(I2C_SLAVE_INSTANCE);
irq_set_enabled(num, false);
irq_remove_handler(num, i2c_slave_irq_handler);
i2c_set_slave_mode(I2C_SLAVE_INSTANCE, false, 0);
transfer_in_progress = false;
i2c_hw_t *hw = i2c_get_hw(I2C_SLAVE_INSTANCE);
hw->intr_mask = I2C_IC_INTR_MASK_RESET;
}

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#ifndef I2C_BUFFER_H
#define I2C_BUFFER_H
#include <stdint.h>
#include "i2c_slave.h"
typedef struct i2c_buffer_t {
uint8_t buffer[256];
uint8_t buffer_reg;
bool buffer_reg_written;
} i2c_buffer_t;
// I2c slave buffer handler for writing and reading data to the buffer
void __not_in_flash_func(i2c_slave_buffer_handler)(i2c_slave_event_t event);
// Update motors from the data in the i2c buffer
void update_motors_from_buffer(void);
// Update servo motors from the data in the i2c buffer
void update_servo_motors_from_buffer(void);
#endif // I2C_BUFFER_H

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/*
* Copyright (c) 2021 Valentin Milea <valentin.milea@gmail.com>
*
* SPDX-License-Identifier: MIT
*/
#ifndef I2C_SLAVE_H
#define I2C_SLAVE_H
#include <hardware/i2c.h>
#define I2C_SLAVE_SDA_PIN 21
#define I2C_SLAVE_SCL_PIN 20
#define I2C_SLAVE_INSTANCE i2c0
#define I2C_SLAVE_ADDRESS 0x09
typedef enum i2c_slave_event_t {
I2C_SLAVE_RECEIVE, // < Data from master is available for reading. Slave must read from Rx FIFO.
I2C_SLAVE_REQUEST, // < Master is requesting data. Slave must write into Tx FIFO.
I2C_SLAVE_FINISH, // < Master has sent a Stop or Restart signal. Slave may prepare for the next transfer.
} i2c_slave_event_t;
static inline uint8_t i2c_slave_read_byte(void)
{
i2c_hw_t *hw = i2c_get_hw(I2C_SLAVE_INSTANCE);
assert(hw->status & I2C_IC_STATUS_RFNE_BITS); // Rx FIFO must not be empty
return (uint8_t)hw->data_cmd;
}
static inline void i2c_slave_write_byte(uint8_t value)
{
i2c_hw_t *hw = i2c_get_hw(I2C_SLAVE_INSTANCE);
assert(hw->status & I2C_IC_STATUS_TFNF_BITS); // Tx FIFO must not be full
hw->data_cmd = value;
}
// Init I2C with default parameters
void i2c_slave_init(void);
// Deinit I2C with default parameters
void i2c_slave_deinit(void);
#endif // I2C_SLAVE_H

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#ifndef MOTORS_H
#define MOTORS_H
#include <pico/stdlib.h>
// Motors
typedef enum motors_enum_t {
MOTOR1,
MOTOR2,
MOTOR3,
MOTOR4,
NB_MOTORS
} motors_enum_t;
typedef struct motor_def_t {
uint pwm_pin;
uint dir1_pin;
uint dir2_pin;
uint8_t buffer_reg;
} motor_def_t;
extern const motor_def_t MOTORS_DEFS[];
// Servo Motors
typedef enum {
SERVO_MOTOR1,
SERVO_MOTOR2,
SERVO_MOTOR3,
SERVO_MOTOR4,
NB_SERVO_MOTORS
} servo_motors_enum_t;
typedef struct {
uint pwm_pin;
uint open_pos;
uint close_pos;
uint8_t buffer_reg;
} servo_motor_def_t;
extern const servo_motor_def_t SERVO_MOTORS_DEFS[];
// Init all motors defined in the MOTORS_DEF array
void init_motors(void);
// Init all servo motors defined in the SERVO_MOTORS_DEF array
void init_servo_motors(void);
// Set [motor] to 0
void motor_zero(motors_enum_t motor);
// Set [motor] in motor_enum_t at [value] between -127 and 128
void motor_set(motors_enum_t motor, int8_t value);
// Set servo motor to its open pos
void servo_motor_zero(servo_motors_enum_t servo_motor);
// Set servo to its close pos if [close] else open pos
void servo_motor_set(servo_motors_enum_t servo_motor, bool close);
#endif // MOTORS_H

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#ifndef ROBOT_H
#define ROBOT_H
#include "i2c_buffer.h"
typedef struct robot_t {
i2c_buffer_t i2c_buffer;
bool is_running;
double delta_time_ms;
} robot_t;
extern robot_t robot;
// Init all robot's components
void robot_init(void);
// Handle inputs and outputs
void robot_handle_inputs_outputs(void);
// Deinit all robot's components
void robot_deinit(void);
#endif // ROBOT_H

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/* *\
Copyrights 2025
Riombotique
\* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Code du RPI Pico gérant les different Actionneurs. *
* Ce Pico est un esclave piloté par le Pico Principal. *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <stdbool.h>
#include "include/robot.h"
robot_t robot;
int main(void)
{
robot_init();
while(robot.is_running)
{
robot_handle_inputs_outputs();
}
robot_deinit();
return 0;
}

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#include "include/motors.h"
#include <pico/stdlib.h>
#include <hardware/pwm.h>
const motor_def_t MOTORS_DEFS[] = {
{0, 4, 5, 0x00},
{1, 6, 7, 0x01},
{2, 9, 8, 0x02},
{3, 11, 10, 0x03},
};
const servo_motor_def_t SERVO_MOTORS_DEFS[] = {
{12, 0, 25000, 0x04},
{13, 0, 25000, 0x05},
{14, 0, 25000, 0x06},
{15, 0, 25000, 0x07},
};
// Init all motors defined in the MOTORS_DEF array
void init_motors(void)
{
for(motors_enum_t actual_motor = MOTOR1; actual_motor < NB_MOTORS; actual_motor++)
{
const motor_def_t *motor_def = &MOTORS_DEFS[actual_motor];
// Init PWM
const uint SLICE_NUM = pwm_gpio_to_slice_num(motor_def->pwm_pin);
gpio_set_function(motor_def->pwm_pin, GPIO_FUNC_PWM);
pwm_set_wrap(SLICE_NUM, 128);
pwm_set_enabled(SLICE_NUM, true);
// Init dir pins
gpio_init(motor_def->dir1_pin);
gpio_set_dir(motor_def->dir1_pin, GPIO_OUT);
gpio_init(motor_def->dir2_pin);
gpio_set_dir(motor_def->dir2_pin, GPIO_OUT);
motor_zero(actual_motor);
}
}
// Init all servo motors defined in the SERVO_MOTORS_DEF array
void init_servo_motors(void)
{
for(servo_motors_enum_t actual_servo_motor = SERVO_MOTOR1; actual_servo_motor < NB_SERVO_MOTORS; actual_servo_motor++)
{
const servo_motor_def_t *servo_motor_def = &SERVO_MOTORS_DEFS[actual_servo_motor];
// Init PWM //
const uint SLICE_NUM = pwm_gpio_to_slice_num(servo_motor_def->pwm_pin);
gpio_set_function(servo_motor_def->pwm_pin, GPIO_FUNC_PWM);
pwm_set_wrap(SLICE_NUM, 25000);
pwm_set_clkdiv(SLICE_NUM, 100);
pwm_set_enabled(SLICE_NUM, true);
servo_motor_zero(actual_servo_motor);
}
}
// Set [motor] to 0
void motor_zero(motors_enum_t motor)
{
const motor_def_t *motor_def = &MOTORS_DEFS[motor];
// Set PWM to zero
pwm_set_gpio_level(motor_def->pwm_pin, 0);
// Set dir pins to false
gpio_put(motor_def->dir1_pin, false);
gpio_put(motor_def->dir2_pin, false);
}
// Set [motor] in motor_enum_t at [value] between -128 and 127 (for this config)
void motor_set(motors_enum_t motor, int8_t value)
{
const motor_def_t *motor_def = &MOTORS_DEFS[motor];
if(value < 0)
{
gpio_put(motor_def->dir1_pin, true);
gpio_put(motor_def->dir2_pin, false);
value = -value;
}
else if(value > 0)
{
gpio_put(motor_def->dir1_pin, false);
gpio_put(motor_def->dir2_pin, true);
}
else
{
gpio_put(motor_def->dir1_pin, false);
gpio_put(motor_def->dir2_pin, false);
}
pwm_set_gpio_level(motor_def->pwm_pin, (uint16_t)value);
}
// Set servo motor to its open pos
void servo_motor_zero(servo_motors_enum_t servo_motor)
{
const servo_motor_def_t *servo_motor_def = &SERVO_MOTORS_DEFS[servo_motor];
// Set PWM to zero //
pwm_set_gpio_level(servo_motor_def->pwm_pin, servo_motor_def->open_pos);
}
// Set servo to its close pos if [close] else open pos
void servo_motor_set(servo_motors_enum_t servo_motor, bool close)
{
const servo_motor_def_t *servo_motor_def = &SERVO_MOTORS_DEFS[servo_motor];
// Set PWM to zero //
pwm_set_gpio_level(servo_motor_def->pwm_pin, close ? servo_motor_def->close_pos : servo_motor_def->open_pos);
}

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#include "include/robot.h"
#include <pico/stdlib.h>
#include "include/motors.h"
#include "include/i2c_slave.h"
void robot_init(void)
{
stdio_init_all();
init_motors();
init_servo_motors();
i2c_slave_init();
robot.is_running = true;
}
void robot_handle_inputs_outputs(void)
{
update_motors_from_buffer();
}
void robot_deinit(void)
{
i2c_slave_deinit();
}