we have an app where we use a nRF52-DK board (with the 52832 chip) as a serial to BLE interface. We connect to the board using the USB UART channel. The interface IC on the board is flashed with binary j-link-ob-sam3u128-v2-nordicsemi-170724.bin
We have flow control on the interface enabled, parity off, baud rate 115200
The issue we see is that if we power cycle the DK and send a short binary packet, the complete packet is received. However if we use the RESET button on the DK, the first byte is NOT received by the nRF52832. This happens consistently and even when several seconds pass between the reset and sending the serial data.
Is this a known issue, is there some step that we need to do after a reset?
Thanks. UART INIT code follows.
void uart_init(void)
{
ret_code_t err_code;
app_uart_comm_params_t const 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_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_LOW,
err_code);
APP_ERROR_CHECK(err_code);
}
