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Init

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This commit is contained in:
Bruno Rybársky
2025-04-04 04:48:13 +02:00
commit 2790bfa772
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46
main/hw/ccs811.c Normal file
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#include "ccs811.h"
#define CONFIG_FREERTOS_HZ 100
i2c_device_config_t CCS811_DEV_CFG = {
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
.device_address = 0x5A,
.scl_speed_hz = 100000,
};
i2c_master_dev_handle_t CCS811_DEV_HANDLE;
void ccs811_init()
{
ESP_ERROR_CHECK(i2c_master_bus_add_device(i2c0_bus_hdl, &CCS811_DEV_CFG, &CCS811_DEV_HANDLE));
mcp23018_set_pin(MCP23018_DEV_HANDLE, MCP_CCS811_WAKE, 0);
mcp23018_set_pin(MCP23018_DEV_HANDLE, MCP_CCS811_POWER, 1);
vTaskDelay(10 / portTICK_PERIOD_MS);
uint8_t reset_seq[4] = {0x11, 0xE5, 0x72, 0x8A};
i2c_write_register(CCS811_DEV_HANDLE, 0xFF, reset_seq, sizeof(reset_seq)); //Reset
vTaskDelay(10 / portTICK_PERIOD_MS);
uint8_t status;
uint16_t version;
i2c_read_register_8(CCS811_DEV_HANDLE, 0x00, &status);
i2c_read_register_16(CCS811_DEV_HANDLE, 0x24, &version);
ESP_LOGW(TAG_CCS, "CCS811 status: %d, version: %d", status, version);
i2c_write_register(CCS811_DEV_HANDLE, 0xF4, NULL, 0); //start
vTaskDelay(10 / portTICK_PERIOD_MS);
i2c_write_register_8(CCS811_DEV_HANDLE, 0x10, 0x0001); // MODE 1 interrupts vypnuté
i2c_read_register_8(CCS811_DEV_HANDLE, 0x00, &status);
i2c_read_register_16(CCS811_DEV_HANDLE, 0x24, &version);
ESP_LOGW(TAG_CCS, "CCS811 status: %d, version: %d", status, version);
}
esp_err_t ccs811_get_data(uint16_t * eCO2, uint16_t * tvoc)
{
uint8_t ccsResult[8];
esp_err_t ret = i2c_read_register(CCS811_DEV_HANDLE, 0x05, ccsResult, 8);
if (ret == ESP_OK)
{
*eCO2 = (ccsResult[0] << 8) | ccsResult[1];
*tvoc = (ccsResult[2] << 8) | ccsResult[3];
ESP_LOGI(TAG_CCS, "CCS Status: %d, Error %d", ccsResult[4], ccsResult[5]);
}
return ret;
}