LAUNCHXL-CC1310: How to printf() to the console or serial port using ITM?

Hi Ki-Soo,

We connected SWV port to the UART-TX port on LAUNCHXL-CC1352P1  board (which is IOID_13), started capturing from the Event Analysis (Tools->Code Analysis->Event Analysis) in debug mode and set the baud rate of the serial receiver application over than 4000000. After these steps we got the printouts in real-time, which is great. Is it possible to capture automatically (by write some code or script) without clicking on capture each time?

The code we used in TI Drivers empty project for LAUNCHXL-CC1352P1 board is below:

/*
 *  ======== empty.c ========
 */

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>

/* Board Header file */
#include "Board.h"

/*
 *  ======== mainThread ========
 */

const unsigned ITM_BASE_ADDRESS = 0xE0000000;
const unsigned ITM_NUM_PORTS = 32;
const unsigned NUM_TRIALS = 2;

typedef volatile unsigned* ITM_port_t;

void delay(unsigned num_loops)
{
  unsigned i;
  for (i=0; i<num_loops; i++)
  {
      asm (" NOP");
  }
}

void port_wait(ITM_port_t port)
{
    delay(10);
    /* Wait while fifo ready */
    while (*port == 0);
}

/* Send a nul terminated string to the port */
void ITM_put_string(ITM_port_t port, const char* data)
{
    unsigned datapos  = 0;
    unsigned portpos  = 0;
    unsigned portdata = 0;

    while('\0' != data[datapos])
    {
        port_wait(port);
        portdata = 0;

        /* Get the next 4 bytes of data */
        for (portpos=0; portpos<4; ++portpos) {
            portdata |= data[datapos] << (8*portpos);
            if ('\0' != data[datapos]) {
                ++datapos;
            }
        }

        /* Write the next 4 bytes of data */
        *port = portdata;
    }
}

/* Send a 32 bit value to the port */
void ITM_put_32(ITM_port_t port, unsigned data)
{
    port_wait(port);
    *port = data;
}

/* Send a 16 bit value to the port */
void ITM_put_16(ITM_port_t port, unsigned short data)
{
    /* Cast port for 16-bit data */
    volatile unsigned short* myport = (volatile unsigned short*)port;
    port_wait(port);
    *myport = data;
}

/* Send a 8 bit value to the port */
void ITM_put_08(ITM_port_t port, unsigned char data)
{
    /* Cast port for 8-bit data */
    volatile unsigned char* myport = (volatile unsigned char*)port;
    port_wait(port);
    *myport = data;
}

void *mainThread(void *arg0)
{
    IOCPortConfigureSet(IOID_13, IOC_PORT_MCU_SWV, IOC_STD_OUTPUT);

    /* 1 second delay */
    uint32_t time = 1;

    /* Call driver init functions */
    GPIO_init();

    /* Configure the LED pin */
    GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Turn on user LED */
    GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);

    while (1) {
        sleep(time);
//        delay(100);
        GPIO_toggle(Board_GPIO_LED0);
        ITM_put_string((ITM_port_t)ITM_BASE_ADDRESS, "hello world\n\r");
    }
}

We'll try to do the same for LAUNCHXL-CC1310 and other boards for the future use.

Regards