CCS/AWR1843BOOST: Different between GPIO_setConfig() and Pinmux_Set_FuncSel() when configuring GPIO and the purpose of BIOS in the project

Part Number: AWR1843BOOST

Tool/software: Code Composer Studio

Hi everyone,

First, my code is shown below:

#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <math.h>

#include <ti/drivers/soc/soc.h>
#include <ti/drivers/esm/esm.h>
#include <ti/drivers/gpio/gpio.h>
#include <ti/drivers/pinmux/pinmux.h>
#include <ti/common/sys_common.h>

int main(void)
{
    int32_t         errCode;
    SOC_Handle     socHandle;
    SOC_Cfg         socCfg;

    /* Initialize the ESM: Don’t clear errors as TI RTOS does it */
    ESM_init(0U);

    /* Initialize the SOC confiugration: */
    memset ((void *)&socCfg, 0, sizeof(SOC_Cfg));

    /* Populate the SOC configuration: */
    socCfg.clockCfg = SOC_SysClock_INIT;
    socCfg.mpuCfg = SOC_MPUCfg_CONFIG;

    /* require to unhalt the DSS if this core is available in selected device */
    socCfg.dssCfg = SOC_DSSCfg_UNHALT;

    /* Initialize the SOC Module: This is done as soon as the application is started
     * to ensure that the MPU is correctly configured.*/
    socHandle = SOC_init (&socCfg, &errCode);
    if (socHandle == NULL)
    {
        return -1;
    }

    /* Configure GPIO */
    GPIO_init ();
    GPIO_setConfig(SOC_XWR18XX_GPIO_2, GPIO_CFG_OUTPUT);
    GPIO_write (SOC_XWR18XX_GPIO_2, 1U);

    while(1)
    {

    }
}

As you can see, in this code, the GPIO_setConfig(SOC_XWR18XX_GPIO_2, GPIO_CFG_OUTPUT); function is used for configuring GPIO and it works. In all the sample code that I have referred , however, I see that the functions Pinmux_Set_FuncSel() and Pinmux_Set_OverrideCtrl() are used. I trying to follow the sample code but it didn't work. Could you please clarify the different between GPIO_setConfig() and Pinmux_Set_FuncSel()?

In addition, in the code above, the BIOS_start() function is not used. I would like to know if BIOS is important in AWR1843 projects. Beside that, is it true that if we want to use BIOS_start() function, we have to comment out the ESM_init() function?

Thanks for your concern!