Here is my problem. I want to disable uart when there is no data coming into MCU. I used IO LotoHi event to enable uart Rx. After finish data receiving, I disable Uart. And before I send data via uart, I enable UART. After sending, I disable it. But based on devzone.nordicsemi.com/.../ Things just do not work well.
void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action){
BLE_LOG("IO INT\r\n");
**NRF_UART0->TASKS_STARTRX = 1;**
}
In the uart_event_handler function, at the end of data receiving, I disabled Rx
void uart_init(void)
{
uint32_t err_code;
const app_uart_comm_params_t comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
.baud_rate = UART_BAUDRATE_BAUDRATE_Baud9600
};
APP_UART_FIFO_INIT(&comm_params,
UART_BUF_SIZE,
UART_BUF_SIZE,
uart_event_handler,
APP_IRQ_PRIORITY_LOW,
err_code);
APP_ERROR_CHECK(err_code);
}
void uart_event_handler(app_uart_evt_t *p_app_uart_event){
uint8_t temp;
static uint8_t index = 0;
static uint8_t msg[UART_BUF_SIZE + 1] = {0x00};
switch(p_app_uart_event->evt_type)
{
case APP_UART_DATA_READY:
UNUSED_VARIABLE(app_uart_get(&msg[index]));
index++;
if ((msg[index - 1] == '\n') || (index >= (UART_BUF_SIZE)))
{
memset(uart_msg, 0, sizeof(uint8_t) * (UART_BUF_SIZE + 1));
memcpy(uart_msg, msg, index);
uart_len = index - 1;
index = 0;
is_uart_ok = true;
**NRF_UART0->TASKS_STOPRX = 1;**
}
break;
......
this did not work normally.
If I use app_uart_close() to replace NRF_UART0->TASKS_STOPRX = 1 and uart_init() to replace NRF_UART0->TASKS_STARTRX = 1 MCU just restart.
