Switch SDK Debug Console to UART

deniscollis — Thu, 04 Jan 2018 22:05:46 GMT

Environment: MCUXpresso, K81 target, Segger J-Link debug probe,

Reference: MCUXpresso IDE and Semihosting

With Semihosting the printf output appears in the MCUXpresso Console, as expected. However, when I switch to UART (Quick Settings -> SDK Debug Console -> UART Console) no output is seen on the LPUART. With UART selected, no output is sent to the MCUXpresso Console, as expected.

I have checked that the SDK_DEBUGCONSOLE define is correctly set (Quick Settings -> Defined Symbols).

I have also checked that the LPUART settings (In my case this is LPUART2 on PTD2/3.) are good.

BTW, LPUART Debug output works just fine with my projects on IAR EWARM, so I know the physical HW is OK.

Re: Switch SDK Debug Console to UART

deniscollis — Thu, 04 Jan 2018 22:58:12 GMT

Oops! Found the problem, it is not directly related to the routing of the debug console. It's about printf(). The code uses DEBUG_PRINT(), defined as follows:

define DEBUG_PRINT(fmt, ...) printf("%s: " fmt, __FUNCTION__, ##__VA_ARGS__)

I.e. it uses printf instead of PRINTF. (Only PRINTF will work as it's defined as DbgConsole_Printf)

topic Switch SDK Debug Console to UART in MCUXpresso SDK

Switch SDK Debug Console to UART

Re: Switch SDK Debug Console to UART