TMDX654IDKEVM: Baremetal UART driver doesn't print and questions in general

Hello,

I got the TMDX654IDKEVM. I want to run a baremetal application on the ARM Cortex-A53 (Compute Cluster) of the processor on the board.

I found the Processor Development Kit () and was able to integrate libraries and headers into my project.

The code I have is the following:

#define SOC_AM65XX
//#define NON_JTAG_BOOT

#include <stdio.h>

#include "board/board.h"
#include "am65xx_idk/include/board_cfg.h"
#include "drv/uart/soc/UART_soc.h"
#include "drv/uart/UART.h"

/**
 * main.c
 */
int main(void)
{
    printf("Starting driver test!\n");
    /**************************************************************************/
    /* INIT BOARD */
    Board_initCfg boardCfg;
    boardCfg =
#ifdef NON_JTAG_BOOT
            BOARD_INIT_MODULE_CLOCK |
            BOARD_INIT_PINMUX_CONFIG |
#endif
            BOARD_INIT_UART_STDIO;

    Board_STATUS status = 0;
    printf("Initializing Board...\n");
    status = Board_init(boardCfg);
    if(status != BOARD_SOK)
    {
        printf("!BOARD_SOK. Exiting.\n");
        return 1;
    }
    printf("BOARD_SOK\n");

    /**************************************************************************/
    /* INIT UART*/
    UART_HwAttrs uart_cfg = {0};
    UART_socGetInitCfg(0, &uart_cfg);
    UART_socSetInitCfg(0, &uart_cfg);

    UART_init();
    /**************************************************************************/
    /* USE UART */
    UART_Handle handle;
    UART_Params params;
    UART_Params_init(&params);
    params.baudRate = 115200;
    handle = UART_open(0, &params);
    if (!handle)
    {
        printf("UART did not open...\n");
    }

    int cnt = 20;
    for(int i = 0; i < cnt; i++)
    {
        const unsigned char hello[] = "Hello World\n";
        int ret = UART_write(handle, hello, sizeof(hello));
        printf("[%d] The UART wrote %d bytes\n", i+1, ret);
    }

    /**************************************************************************/
    printf("Done driver test!\n");
	return 0;
}

The project strucute looks like this:

where the file linker_a53.lds file is from the PDK

• <PDK INSTALL PATH>/packages/ti/build/am65xx/linker_a53.lds

The drivers and other abstraction layers, which were needed to build the project successfully were here: 

• C:\ti\pdk_am65xx_08_02_00_21\packages\ti
• C:\ti\pdk_am65xx_08_02_00_21\packages\ti\drv
• C:\ti\pdk_am65xx_08_02_00_21\packages\ti\drv\uartC:\ti\pdk_am65xx_08_02_00_21\packages\ti\drv\uart