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Changing code in i2c_master, added function for read specific registers

This commit is contained in:
Ulysse Cura 2025-05-07 20:35:08 +02:00
parent aa0000a02a
commit 768e112d52
2 changed files with 28 additions and 12 deletions
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28
main controller code/src/i2c_master.c
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@ -1,17 +1,31 @@
#include "include/i2c_master.h" #include "include/i2c_master.h"
inline void i2c_master_send(uint8_t address, const uint8_t *src, size_t len) #include <pico/stdlib.h>
#include <hardware/i2c.h>
void i2c_master_init(void)
{ {
i2c_write_blocking_until(I2C_MASTER_INSTANCE, address, src, len, false, I2C_MASTER_MAX_TIMEOUT); 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);
} }
inline void i2c_master_receive(uint8_t address, uint8_t *dst, size_t len) inline void i2c_master_write(uint8_t address, const uint8_t *src, size_t len)
{ {
i2c_read_blocking_until(I2C_MASTER_INSTANCE, address, dst, len, false, I2C_MASTER_MAX_TIMEOUT); i2c_write_blocking(I2C_MASTER_INSTANCE, address, src, len, false);
} }
inline void i2c_master_send_receive(uint8_t address, uint8_t *data, size_t len) inline void i2c_master_read(uint8_t address, uint8_t *dst, size_t len)
{ {
i2c_write_blocking_until(I2C_MASTER_INSTANCE, address, data, len, true, I2C_MASTER_MAX_TIMEOUT); i2c_read_blocking(I2C_MASTER_INSTANCE, address, dst, len, false);
i2c_master_receive(address, data, len); }
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);
} }

12
main controller code/src/include/i2c_master.h
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@ -6,13 +6,15 @@
#define I2C_MASTER_SDA_PIN 4 #define I2C_MASTER_SDA_PIN 4
#define I2C_MASTER_SCL_PIN 5 #define I2C_MASTER_SCL_PIN 5
#define I2C_MASTER_INSTANCE i2c0 #define I2C_MASTER_INSTANCE i2c0
#define I2C_MASTER_MAX_TIMEOUT 10000 #define I2C_MASTER_BAUD_RATE 100 * 1000
// Init master i2c
void i2c_master_init(void);
// Send [src] of [len] to [address] and close communication // Send [src] of [len] to [address] and close communication
void i2c_master_send(uint8_t address, const uint8_t *src, size_t len); void i2c_master_write(uint8_t address, const uint8_t *src, size_t len);
// Receive [dst] of [len] from [address] and close communication // Receive [dst] of [len] from [address] and close communication
void i2c_master_receive(uint8_t address, uint8_t *dst, size_t len); void i2c_master_read(uint8_t address, uint8_t *dst, size_t len);
// Send [data] of [len] to [address], receive [data] of [len] from [address] and close communication // Send [reg] and receive data in [dst] and close communition
void i2c_master_send_receive(uint8_t address, uint8_t *data, size_t len); void i2c_master_read_reg(uint8_t address, uint8_t reg, uint8_t *dst, size_t len);
#endif // I2C_MASTER_H #endif // I2C_MASTER_H