How to read data from UART RX interrupt? (SDK 17.0.2)

[M333_TW]

Hi

I want to receive data through UART RX interrupt.

--> An interruption occurs to notify me when one character(byte) is received, and i store it to my memory buffer

The example project I used is "examples/peripheral/uart/main.c"

But this example seems to have only polling mode way.

How can I use the interrupt method to receive data one character by character?

Can you give me some example? 

thanks!!

uart initi:

const app_uart_comm_params_t comm_params = {    RX_PIN_NUMBER,    TX_PIN_NUMBER,    RTS_PIN_NUMBER,    CTS_PIN_NUMBER,    UART_HWFC,    false,    #if defined (UART_PRESENT)    NRF_UART_BAUDRATE_115200    #else    NRF_UARTE_BAUDRATE_115200    #endif }; APP_UART_FIFO_INIT(&comm_params,    UART_RX_BUF_SIZE,    UART_TX_BUF_SIZE,    uart_error_handle,    APP_IRQ_PRIORITY_LOWEST,    err_code);

while loop

while (true) {    uint8_t cr;    while (app_uart_get(&cr) != NRF_SUCCESS);    while (app_uart_put(cr) != NRF_SUCCESS);    if (cr == 'q' || cr == 'Q')    {    printf("tick1 = %d\r\n", nrf_drv_rtc_counter_get(&rtc));    } }

[Henry_Chou]

Applay as this

static 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, //APP_UART_FLOW_CONTROL_ENABLED,
.use_parity = false,
.baud_rate = UART_BAUDRATE_BAUDRATE_Baud115200
};

APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);

APP_ERROR_CHECK(err_code);
}

void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[128];
static uint8_t index = 0;

switch (p_event->evt_type)
{
/**@snippet [Handling data from UART] */
case APP_UART_DATA_READY:
//UNUSED_VARIABLE(app_uart_get(&data_array[index]));
app_uart_get(&data_array[index]);
index++;

if ((data_array[index - 1] == '\n') || (index >=127))
{
data_array[index]=0;
index = 0;
memcpy(uart_rx_buff,data_array,sizeof(data_array));
}
break;
/**@snippet [Handling data from UART] */
case APP_UART_COMMUNICATION_ERROR:
APP_ERROR_HANDLER(p_event->data.error_communication);
break;

case APP_UART_FIFO_ERROR:
APP_ERROR_HANDLER(p_event->data.error_code);
break;

default:
break;
}
}

[M333_TW]

thanks for your help!

its working after changing the initial settings.

[Henry_Chou]

But the handler is not included the RX data timeout procedure. You have to apply the RTC timer handler for timeout by your own.

[MMD]

I entered the code you said but nothing will be executed. Can you help? thank you