Hi,
I am using nRF5_SDK_12.3.0 and writing customized firmware based on uart example.
Everything works fine with the DK. Then I program the firmware to a nrf51822 module using the DK after modifying the board definition to fix my customized board.
My firmware will send out a start up message though uart after uart initiation. However, I can only capture that uart message if the customized board is connected with the DK.
Here is my initialization code:
#define RX_PIN_NUMBER UART_PIN_DISCONNECTED
#define TX_PIN_NUMBER 3
#define CTS_PIN_NUMBER UART_PIN_DISCONNECTED
#define RTS_PIN_NUMBER UART_PIN_DISCONNECTED
const app_uart_comm_params_t comm_params =
{
RX_PIN_NUMBER,
TX_PIN_NUMBER,
RTS_PIN_NUMBER,
CTS_PIN_NUMBER,
APP_UART_FLOW_CONTROL_DISABLED,
false,
UART_BAUDRATE_BAUDRATE_Baud115200
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_error_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
I have also tried to send message periodically as followings:
uart_tx_length = sprintf(uart_tx_buf, "START\r\n");
while(true)
{
nrf_delay_ms(250);
user_uart_write(uart_tx_buf, uart_tx_length);
}
where user_uart_write is as follows:
void user_uart_write(char *buf, uint8_t length)
{
for (uint32_t i = 0; i < length; i++)
{
while (app_uart_put(buf[i]) != NRF_SUCCESS);
}
}
It keep sending the "START\r\n" when connected to the DK and stop when I unplug the customized board from it.
Any idea what have I don't wrong?
