printf only sends a single byte?

[Peter]

I'm attempting to use the app_trace module. I've set it up as follows:

int main(void)
{	
    // Setup tracing. Also sets up UART.
    app_trace_init();

    app_trace_log("Starting...\r\n");

I'm using PuTTY to connect (to COM5 in my case) with the following parameters: Speed: 115200 Data bits: 8 Stop bits: 1 Parity: None Flow control: None

These should match the settings that the trace module uses in the 7.1 SDK.

My issue is that app_trace_log() sends only a single byte over the serial line ("S" in my case). Any other calls to app_trace_log() also send only the first byte of the string.

[Peter]

"You have to check which kind of app_uart you have linked to your project. App_trace requires app_uart_fifo.c"

Wojciech Jasko posted that solution as a comment in another question. I'm not sure if it solved the original poster's problem, but it answers this question here.

In Keil uVision, you can choose the FIFO version of UART by going to Manage Run-Time Environment->nRF_Driver->app_uart and chose "Fifo" for the variant drop-down.

[hawk]

yes, you must use app_uart_fifo.c, not app_uart.c, it had better modfiy the document of nordic nrf51.