void mbed_itm_init(void)
{
static bool do_init = true;
if (do_init) {
do_init = false;
itm_init();
/* Enable write access to ITM registers. */
ITM->LAR = ITM_ENABLE_WRITE;
/* Trace Port Interface Selected Pin Protocol Register. */
TPI->SPPR = (SWO_NRZ << TPI_SPPR_TXMODE_Pos);
/* Trace Port Interface Formatter and Flush Control Register */
TPI->FFCR = (1 << TPI_FFCR_TrigIn_Pos);
/* Data Watchpoint and Trace Control Register */
DWT->CTRL = (1 << DWT_CTRL_CYCTAP_Pos) |
(0xF << DWT_CTRL_POSTINIT_Pos) |
(0xF << DWT_CTRL_POSTPRESET_Pos) |
(1 << DWT_CTRL_CYCCNTENA_Pos);
/* Trace Privilege Register.
* Disable access to trace channel configuration from non-privileged mode.
*/
ITM->TPR = 0x0;
/* Trace Control Register */
ITM->TCR = (1 << ITM_TCR_TraceBusID_Pos) |
(1 << ITM_TCR_DWTENA_Pos) |
(1 << ITM_TCR_SYNCENA_Pos) |
(1 << ITM_TCR_ITMENA_Pos);
/* Trace Enable Register */
ITM->TER = SWO_STIMULUS_PORT;
}
}
int main(void)
{
/* Unbuffered standard IO */
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
#ifdef USE_ITM
itm_init();
printf("STM32F0xx Blinkenlights Demo\n");
#endif
xTaskCreate(blinky_task,
(signed portCHAR *) "blinkenlights",
configMINIMAL_STACK_SIZE,
NULL,
(tskIDLE_PRIORITY + 2),
NULL);
vTaskStartScheduler();
return 0;
}