I am an STM32 newbie. I recently got an STM32F429 Discovery dev board which I have been playing around with. Currently I'm trying to figure out how to use the debugging functions of this M4 Cortex, specifically the SWV ones.
I used STM32CubeMX to generate a project and then modified the main.c files infinite loop as follows to blink an LED on and off every 2 seconds and to printf a message to the console.
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while (1)
{
HAL_GPIO_TogglePin(GPIOG,GPIO_PIN_13);
HAL_Delay(2000);
printf("hello");
}When I run the debug it programs the board fine. I followed the steps in this http://blog.atollic.com/cortex-m-debugging-printf-redirection-to-a-debugger-console-using-swv/itm-part-1 article which explains how to setup printf redirect to the console however I can't get it to do so. When I step through my code and get to that printf("hello") line it just skips over it like it doesn't exist and nothing is printed to the console.
I've attached a picture of my debug settings and below I have placed the modified version of int _write which resides in my syscalls.c file. I also have "#include "stm32f4xx.h" in that file.
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int _write(int32_t file, uint8_t *ptr, int32_t len)
{
int i=0;
for(i=0 ; i<len ; i++)
ITM_SendChar((*ptr++));
return len;
errno = ENOSYS;
return -1;
}
I would greatly appreciate if anyone could assist me in getting the printf to console to work.