Use T5 Peripheral Interfaces

This topic describes how to use the T5 peripheral interfaces.

GPIOs

The following figure shows the hardware wiring:

Output level

Initialization

OPERATE_RET tuya_ai_toy_GPIO20_init(void)
{
    OPERATE_RET rt = OPRT_OK;

    TUYA_GPIO_BASE_CFG_T cfg;
    cfg.mode = TUYA_GPIO_PULLDOWN;
    cfg.direct = TUYA_GPIO_OUTPUT;
    cfg.level = TUYA_GPIO_LEVEL_LOW;
    TAL_PR_DEBUG("GPIO %d initialized", TUYA_GPIO_NUM_20);
    tkl_gpio_init(TUYA_GPIO_NUM_20, &cfg);

    return rt;
}

TUYA_GPIO_NUM_20 output level

The GPIO is used for output. The sample code is as follows:

tkl_gpio_write(TUYA_GPIO_NUM_20, 1); // P20 outputs high level
tkl_gpio_write(TUYA_GPIO_NUM_20, 0); // P20 outputs low level

Input level

The GPIO reads external level. The sample code is as follows:

app_key_init(para.reset_key_pin);

Serial port

The following figure shows the pinout of the development board. uart0 corresponds to P10 and P11.

Sample code

You can refer to the following sample code to implement data transmission/reception via UART.

// Transmit and receive
void my_uart_rx_callback_task(VOID_T *args) {
    char buff[256] = {0};
    int read_uart_len ;
    while(1)
    {
        read_uart_len = tal_uart_get_rx_data_size(TUYA_UART_NUM_0);
        if (read_uart_len > 0 && read_uart_len <= 256)
        {
            //Receive
            tal_uart_read(TUYA_UART_NUM_0, buff,read_uart_len);

            //Print
            TAL_PR_HEXDUMP_DEBUG("read uart:",buff,read_uart_len);

            char str[read_uart_len + 1];
            for (int i = 0; i < read_uart_len; i++) {
                str[i] = ((char*)buff)[i];
            }

            str[read_uart_len] = '\0';
            tkl_log_output("UART received data: %s\n", str);

            // Transmit
            char data[] = {0x01,0x02,0x03,0x05,0x08};
            int len = sizeof(data) / sizeof(data[0]); //
            tal_uart_write(TUYA_UART_NUM_0, (const unsigned char *)data, len);


        }
    }

}
void user_uart_demo(void)
{
    TAL_UART_CFG_T cfg;
    memset(&cfg, 0, sizeof(TAL_UART_CFG_T));
    cfg.base_cfg.baudrate = 115200;
    cfg.base_cfg.databits = TUYA_UART_DATA_LEN_8BIT;
    cfg.base_cfg.parity = TUYA_UART_PARITY_TYPE_NONE;
    cfg.base_cfg.stopbits = TUYA_UART_STOP_LEN_1BIT;
    cfg.rx_buffer_size = 256;

    tal_uart_init(TUYA_UART_NUM_0, &cfg);

    OPERATE_RET rt = OPRT_OK;
    THREAD_HANDLE uart_task_handle;
    THREAD_CFG_T thread_cfg = {
        .thrdname = "uart_task",
        .priority = THREAD_PRIO_5,
        .stackDepth = 4096
    };
    TUYA_CALL_ERR_LOG(tal_thread_create_and_start(&uart_task_handle, NULL, NULL, my_uart_rx_callback_task, NULL, &thread_cfg));

}