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feat(i2c_slave): Add new implementation and API for I2C slave

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This commit is contained in:
Cao Sen Miao
2023-10-24 18:44:49 +08:00
parent ca32e5268b
commit 8d639492f2
27 changed files with 1046 additions and 141 deletions
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48
components/driver/i2c/i2c_common.c
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@@ -37,7 +37,7 @@ typedef struct i2c_platform_t {
static i2c_platform_t s_i2c_platform = {}; // singleton platform
esp_err_t i2c_acquire_bus_handle(i2c_port_num_t port_num, i2c_bus_handle_t *i2c_new_bus, i2c_bus_mode_t mode)
static esp_err_t s_i2c_bus_handle_aquire(i2c_port_num_t port_num, i2c_bus_handle_t *i2c_new_bus, i2c_bus_mode_t mode)
{
#if CONFIG_I2C_ENABLE_DEBUG_LOG
esp_log_level_set(TAG, ESP_LOG_DEBUG);
@@ -76,15 +76,41 @@ esp_err_t i2c_acquire_bus_handle(i2c_port_num_t port_num, i2c_bus_handle_t *i2c_
return ret;
}
bool i2c_bus_occupied(i2c_port_num_t port_num)
static bool i2c_bus_occupied(i2c_port_num_t port_num)
{
return s_i2c_platform.buses[port_num] != NULL;
}
esp_err_t i2c_acquire_bus_handle(i2c_port_num_t port_num, i2c_bus_handle_t *i2c_new_bus, i2c_bus_mode_t mode)
{
bool bus_occupied = false;
bool bus_found = false;
esp_err_t ret = ESP_OK;
_lock_acquire(&s_i2c_platform.mutex);
if (s_i2c_platform.buses[port_num]) {
bus_occupied = true;
if (port_num == -1) {
for (int i = 0; i < SOC_I2C_NUM; i++) {
bus_occupied = i2c_bus_occupied(i);
if (bus_occupied == false) {
ret = s_i2c_bus_handle_aquire(i, i2c_new_bus, mode);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "acquire bus failed");
_lock_release(&s_i2c_platform.mutex);
return ret;
}
bus_found = true;
port_num = i;
break;
}
}
ESP_RETURN_ON_FALSE((bus_found == true), ESP_ERR_NOT_FOUND, TAG, "acquire bus failed, no free bus");
} else {
ret = s_i2c_bus_handle_aquire(port_num, i2c_new_bus, mode);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "acquire bus failed");
}
}
_lock_release(&s_i2c_platform.mutex);
return bus_occupied;
return ret;
}
esp_err_t i2c_release_bus_handle(i2c_bus_handle_t i2c_bus)
@@ -205,12 +231,8 @@ esp_err_t i2c_common_set_pins(i2c_bus_handle_t handle)
.pull_up_en = handle->pull_up_enable ? GPIO_PULLUP_ENABLE : GPIO_PULLUP_DISABLE,
.pin_bit_mask = 1ULL << handle->sda_num,
};
#if CONFIG_IDF_TARGET_ESP32
// on esp32, must enable internal pull-up
sda_conf.pull_up_en = GPIO_PULLUP_ENABLE;
#endif
ESP_RETURN_ON_ERROR(gpio_config(&sda_conf), TAG, "config GPIO failed");
ESP_RETURN_ON_ERROR(gpio_set_level(handle->sda_num, 1), TAG, "i2c sda pin set level failed");
ESP_RETURN_ON_ERROR(gpio_config(&sda_conf), TAG, "config GPIO failed");
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[handle->sda_num], PIN_FUNC_GPIO);
esp_rom_gpio_connect_out_signal(handle->sda_num, i2c_periph_signal[port_id].sda_out_sig, 0, 0);
esp_rom_gpio_connect_in_signal(handle->sda_num, i2c_periph_signal[port_id].sda_in_sig, 0);
@@ -224,12 +246,8 @@ esp_err_t i2c_common_set_pins(i2c_bus_handle_t handle)
.pull_up_en = handle->pull_up_enable ? GPIO_PULLUP_ENABLE : GPIO_PULLUP_DISABLE,
.pin_bit_mask = 1ULL << handle->scl_num,
};
#if CONFIG_IDF_TARGET_ESP32
// on esp32, must enable internal pull-up
scl_conf.pull_up_en = GPIO_PULLUP_ENABLE;
#endif
ESP_RETURN_ON_ERROR(gpio_config(&scl_conf), TAG, "config GPIO failed");
ESP_RETURN_ON_ERROR(gpio_set_level(handle->scl_num, 1), TAG, "i2c scl pin set level failed");
ESP_RETURN_ON_ERROR(gpio_config(&scl_conf), TAG, "config GPIO failed");
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[handle->scl_num], PIN_FUNC_GPIO);
esp_rom_gpio_connect_out_signal(handle->scl_num, i2c_periph_signal[port_id].scl_out_sig, 0, 0);
esp_rom_gpio_connect_in_signal(handle->scl_num, i2c_periph_signal[port_id].scl_in_sig, 0);