BRNSystems/cardputerfw
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This commit is contained in:
Bruno Rybársky
2026-05-08 23:46:39 +02:00
parent 469177e5cb
commit 0a7e80a16a
9 changed files with 1855 additions and 144 deletions
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main/drivers/i2c.c
+17 -41
View File
@@ -1,4 +1,5 @@
#include "i2c.h"
#include "driver/i2c_types.h"
#include "esp_err.h"
#include <string.h>
@@ -17,71 +18,46 @@ void i2c_init(int sda, int scl) {
i2c_new_master_bus(&cfg, &bus);
}
esp_err_t i2c_write_reg(uint8_t addr, uint8_t reg, uint8_t val) {
esp_err_t i2c_write_reg(i2c_master_dev_handle_t dev, uint8_t reg, uint8_t val) {
uint8_t data[2] = {reg, val};
i2c_master_dev_handle_t dev;
i2c_device_config_t dev_cfg = {
.device_address = addr,
.scl_speed_hz = 400000,
};
i2c_master_bus_add_device(bus, &dev_cfg, &dev);
esp_err_t r = i2c_master_transmit(dev, data, 2, -1);
i2c_master_bus_rm_device(dev);
return r;
}
esp_err_t i2c_read_reg(uint8_t addr, uint8_t reg, uint8_t *val) {
i2c_master_dev_handle_t dev;
i2c_device_config_t dev_cfg = {
.device_address = addr,
.scl_speed_hz = 400000,
};
esp_err_t i2c_write_reg_multi(i2c_master_dev_handle_t dev, uint8_t reg, const uint8_t *data,
size_t len) {
i2c_master_bus_add_device(bus, &dev_cfg, &dev);
esp_err_t err;
// reg + payload
uint8_t buf[len + 1];
buf[0] = reg;
memcpy(&buf[1], data, len);
err = i2c_master_transmit(dev, buf, len + 1, -1);
return err;
}
esp_err_t i2c_read_reg(i2c_master_dev_handle_t dev, uint8_t reg, uint8_t *val) {
i2c_master_transmit_receive(dev, &reg, 1, val, 1, -1);
i2c_master_bus_rm_device(dev);
return ESP_OK;
}
esp_err_t i2c_read_multi(uint8_t addr, uint8_t reg, uint8_t *buf, int len) {
i2c_master_dev_handle_t dev;
i2c_device_config_t dev_cfg = {
.device_address = addr,
.scl_speed_hz = 400000,
};
i2c_master_bus_add_device(bus, &dev_cfg, &dev);
esp_err_t i2c_read_multi(i2c_master_dev_handle_t dev, uint8_t reg, uint8_t *buf, int len) {
i2c_master_transmit_receive(dev, &reg, 1, buf, len, -1);
i2c_master_bus_rm_device(dev);
return ESP_OK;
}
esp_err_t i2c_read_reg_multi(uint8_t addr, uint8_t reg, uint8_t *buf,
esp_err_t i2c_read_reg_multi(i2c_master_dev_handle_t dev, uint8_t reg, uint8_t *buf,
size_t len) {
i2c_master_dev_handle_t dev;
i2c_device_config_t cfg = {
.device_address = addr,
.scl_speed_hz = 400000,
};
esp_err_t err;
err = i2c_master_bus_add_device(bus, &cfg, &dev);
if (err != ESP_OK)
return err;
err = i2c_master_transmit_receive(dev, &reg, 1, buf, len, -1);
i2c_master_bus_rm_device(dev);
return err;
}