SERIAL PORT RECEIVE

[Dev1]

Hello, 

I have nrf52 and configure uart0 for connection with external device. 
I have configured it as NRF_SERIAL_MODE_DMA and  set irq_handler .receive NRF_SERIAL_EVENT_DRV_ERR event.

Please help to fix issue.
Thanks in advance!

[Dev1]

Sorry for mistakes I have wrote from mobile.
I have received NRF_SERIAL_EVENT_DRV_ERR  event in handler.

[Jørgen Holmefjord]

Please post code showing how you configure UART and how you send/receive data.

[Dev1]

Hi ,
I am receiving/transmitting by nrf_serial_read/nrf_serial_write functions

Bellow are configuration of serial:

static void serial_event_handler(struct nrf_serial_s const * p_serial,
nrf_serial_event_t event) 
{
switch (event)
{
case NRF_SERIAL_EVENT_TX_DONE:
break;
case NRF_SERIAL_EVENT_RX_DATA:
{
ret_code_t ret;
char c;
//Read one char from queue
ret = nrf_queue_read(p_serial->p_ctx->p_config->p_queues->p_rxq, &c, sizeof(c));
//printf('%c\r\n', c);
//Echo char back to port
//(void)nrf_serial_write(p_serial, &c, sizeof(c), NULL, 0);
}
break;
case NRF_SERIAL_EVENT_DRV_ERR:

break;
case NRF_SERIAL_EVENT_FIFO_ERR:
printf("Error\r\n");
break;
default:
break;
}

}
#define OP_QUEUES_SIZE 3
#define APP_TIMER_PRESCALER NRF_SERIAL_APP_TIMER_PRESCALER


#define RBP_UARTE0_RX_PIN_NUMBER NRF_GPIO_PIN_MAP(0,RX_PIN)
#define RBP_UARTE0_TX_PIN_NUMBER NRF_GPIO_PIN_MAP(0,TX_PIN)
#define RBP_UARTE0_CTS_PIN_NUMBER NRF_UART_PSEL_DISCONNECTED
#define RBP_UARTE0_RTS_PIN_NUMBER NRF_UART_PSEL_DISCONNECTED
#define RBP_UARTE0_HWFC false



NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uart0_drv_config,
RBP_UARTE0_RX_PIN_NUMBER,
RBP_UARTE0_TX_PIN_NUMBER,
RBP_UARTE0_RTS_PIN_NUMBER,
RBP_UARTE0_CTS_PIN_NUMBER,
RBP_UARTE0_HWFC,
NRF_UART_PARITY_EXCLUDED,
NRF_UART_BAUDRATE_115200,
UART_DEFAULT_CONFIG_IRQ_PRIORITY);




#define SERIAL_FIFO_TX_SIZE 1024
#define SERIAL_FIFO_RX_SIZE 1024
NRF_SERIAL_QUEUES_DEF(serial0_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE);


#define SERIAL_BUFF_TX_SIZE 1
#define SERIAL_BUFF_RX_SIZE 1

NRF_SERIAL_BUFFERS_DEF(serial0_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE);


NRF_SERIAL_CONFIG_DEF(serial0_config, NRF_SERIAL_MODE_DMA,
&serial0_queues, &serial0_buffs, nrf_serial_event_t, NULL);

NRF_SERIAL_UART_DEF(serial0_uart, 0);

[Jørgen Holmefjord]

Can you try debugging the application, set a breakpoint inside the NRF_DRV_UART_EVT_ERROR case in uart_event_handler (line 161 in nrf_serial.c), and check what the error_mask is set to (p_event->data.error.error_mask)?