61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#include "i2c_maitre.h"
|
|
#include "hardware/gpio.h"
|
|
#include "hardware/i2c.h"
|
|
#include "pico/stdlib.h"
|
|
#include <stdio.h>
|
|
|
|
#define I2C_SDA_PIN 16
|
|
#define I2C_SCL_PIN 17
|
|
|
|
void i2c_maitre_init(void){
|
|
stdio_init_all();
|
|
i2c_init(i2c0, 100 * 1000);
|
|
|
|
gpio_set_function(I2C_SDA_PIN, GPIO_FUNC_I2C);
|
|
gpio_set_function(I2C_SCL_PIN, GPIO_FUNC_I2C);
|
|
|
|
gpio_set_function(6, GPIO_FUNC_NULL);
|
|
gpio_set_function(7, GPIO_FUNC_NULL);
|
|
|
|
}
|
|
|
|
/// @brief Pour l'instant bloquant, mais devrait passer en non bloquant bientôt
|
|
/// @param adresse_7_bits
|
|
/// @param
|
|
/// @return 0: en cours,
|
|
int i2c_lire_registre(char adresse_7_bits, char registre, char * reception, char len){
|
|
int statu;
|
|
char emission[1];
|
|
|
|
emission[0] = registre;
|
|
statu = i2c_write_blocking (i2c0, adresse_7_bits, emission, 1, 0);
|
|
if(statu == PICO_ERROR_GENERIC){
|
|
printf("I2C - Envoi registre Echec\n");
|
|
return I2C_ECHEC;
|
|
}
|
|
|
|
statu = i2c_read_blocking (i2c0, adresse_7_bits, reception, len, 0);
|
|
if(statu == PICO_ERROR_GENERIC){
|
|
printf("I2C - Lecture registre Echec\n");
|
|
return I2C_ECHEC;
|
|
}
|
|
|
|
return I2C_SUCCES;
|
|
}
|
|
|
|
int i2c_ecrire_registre(char adresse_7_bits, char registre, char valeur_registre){
|
|
int statu;
|
|
char emission[2];
|
|
|
|
emission[0] = registre;
|
|
emission[1] = valeur_registre;
|
|
statu = i2c_write_blocking (i2c0, adresse_7_bits, emission, 2, 0);
|
|
if(statu == PICO_ERROR_GENERIC){
|
|
printf("Erreur ecrire registre\n");
|
|
return I2C_ECHEC;
|
|
}
|
|
|
|
printf("i2c Registre %x, valeur %x\n", registre, valeur_registre);
|
|
|
|
return I2C_SUCCES;
|
|
} |