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