Fix access to the DWT peripheral for STM32 HAL (#12434)

Access to the DWT peripheral for the `CYCCNT` register needs to happen before `main()`. The code needs to be called after the setup of the system clocks, so the right place is between the `premain()` and `main()` function of the STM32 Arduino core.

This patch moves the DWT access code to a new function, which is then placed between `premain()` and `main()`.
This commit is contained in:
Nils Hasenbanck 2018-11-18 08:30:46 +01:00 committed by Scott Lahteine
parent 7f225b9421
commit 5a4fd8e0a6

View file

@ -78,14 +78,20 @@ uint16_t HAL_adc_result;
// Public functions // Public functions
// -------------------------------------------------------------------------- // --------------------------------------------------------------------------
// HAL initialization task
void HAL_init(void) {
// Needed for DELAY_NS() / DELAY_US() on CORTEX-M7 // Needed for DELAY_NS() / DELAY_US() on CORTEX-M7
#if (defined(__arm__) || defined(__thumb__)) && __CORTEX_M == 7 #if (defined(__arm__) || defined(__thumb__)) && __CORTEX_M == 7
// HAL pre-initialization task
// Force the preinit function to run between the premain() and main() function
// of the STM32 arduino core
__attribute__((constructor (102)))
void HAL_preinit() {
enableCycleCounter(); enableCycleCounter();
}
#endif #endif
// HAL initialization task
void HAL_init(void) {
FastIO_init(); FastIO_init();
#if ENABLED(SDSUPPORT) #if ENABLED(SDSUPPORT)