Hello,
Hello,
I am experiencing the same issues as these individuals : https://community.st.com/t5/stm32-mcus-products/stm32h757-swo-debug-error/m-p/738531#M265220
When I launch my debug with SWO enabled, I encounter errors upon launch, and if the errors are not displayed, the prints do not works, even though I have already used them on other projects with other processors and they worked.
I have follow instructions to activate sw (enable two, set clock, set prescaler, use ITM console, ...)
my print function is :
int __io_putchar(int ch)
{
ITM_SendChar(ch);
return(ch);
}
But I have the error, so I try lot of things,
* change cables and PC port
* change my PC (Mac and Windows) (STM32CubeIDE 1.18.0)
* set script to set sw register, in Debug Configurations > startup > Run commands
* set by my self swo pin (see below)
* do my own swo_init function called in main after GPIO init (see below)
Nothing works, can someone help me ?
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = 1 << SWO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF0_SWJ;
HAL_GPIO_Init(SWO_PORT, &GPIO_InitStruct);
}
static void SWO_Init(uint32_t coreClockHz, uint32_t swoSpeedHz)
{
// Enable TRACECLK (optional depending on family)
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
// Unlock ITM
ITM->LAR = 0xC5ACCE55;
// Enable ITM and stimulus port 0
ITM->TCR = ITM_TCR_ITMENA_Msk | ITM_TCR_SYNCENA_Msk | ITM_TCR_TSENA_Msk | ITM_TCR_SWOENA_Msk;
ITM->TER = 0x1; // Enable stimulus port 0
// Configure DWT
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
// Configure TPIU
TPI->ACPR = (coreClockHz / swoSpeedHz) - 1; // Set SWO speed
TPI->SPPR = 0x00000001; // NRZ / UART protocol
TPI->FFCR = 0x00000100; // Disable formatting
TPI->CSPSR = 1; // Port size = 1 bit
}
