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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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components/driver/i2c/i2c_master.c
+2 -29
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@@ -35,7 +35,6 @@
#include "freertos/idf_additions.h"
static const char *TAG = "i2c.master";
static _lock_t s_i2c_bus_acquire;
#define DIM(array) (sizeof(array)/sizeof(*array))
#define I2C_ADDRESS_TRANS_WRITE(device_address) (((device_address) << 1) | 0)
@@ -785,39 +784,13 @@ esp_err_t i2c_new_master_bus(const i2c_master_bus_config_t *bus_config, i2c_mast
ESP_RETURN_ON_FALSE(bus_config, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
ESP_RETURN_ON_FALSE((bus_config->i2c_port < SOC_I2C_NUM || bus_config->i2c_port == -1), ESP_ERR_INVALID_ARG, TAG, "invalid i2c port number");
ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(bus_config->sda_io_num) && GPIO_IS_VALID_GPIO(bus_config->scl_io_num), ESP_ERR_INVALID_ARG, TAG, "invalid SDA/SCL pin number");
bool bus_occupied = false;
bool bus_found = false;
i2c_master = heap_caps_calloc(1, sizeof(i2c_master_bus_t) + 20 * sizeof(i2c_transaction_t), I2C_MEM_ALLOC_CAPS);
ESP_RETURN_ON_FALSE(i2c_master, ESP_ERR_NO_MEM, TAG, "no memory for i2c master bus");
_lock_acquire(&s_i2c_bus_acquire);
if (i2c_port_num == -1) {
for (int i = 0; i < SOC_I2C_NUM; i++) {
bus_occupied = i2c_bus_occupied(i);
if (bus_occupied == false) {
ret = i2c_acquire_bus_handle(i, &i2c_master->base, I2C_BUS_MODE_MASTER);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "acquire bus failed");
_lock_release(&s_i2c_bus_acquire);
goto err;
}
bus_found = true;
i2c_port_num = i;
break;
}
}
ESP_GOTO_ON_FALSE((bus_found == true), ESP_ERR_NOT_FOUND, err, TAG, "acquire bus failed, no free bus");
} else {
ret = i2c_acquire_bus_handle(i2c_port_num, &i2c_master->base, I2C_BUS_MODE_MASTER);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "acquire bus failed");
_lock_release(&s_i2c_bus_acquire);
goto err;
}
}
_lock_release(&s_i2c_bus_acquire);
ESP_GOTO_ON_ERROR(i2c_acquire_bus_handle(i2c_port_num, &i2c_master->base, I2C_BUS_MODE_MASTER), err, TAG, "I2C bus acquire failed");
i2c_port_num = i2c_master->base->port_num;
i2c_hal_context_t *hal = &i2c_master->base->hal;
i2c_master->base->scl_num = bus_config->scl_io_num;