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STM32L0 - Add patch done previously on these devices. This solves MBED_24 test.

pull/3213/head
bcostm 2016-10-26 17:30:46 +02:00
parent a2e686b82c
commit 589500642a
1 changed files with 25 additions and 0 deletions
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25
targets/TARGET_STM/stm_us_ticker_16b.c
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@ -68,7 +68,32 @@ uint32_t us_ticker_read()
tim_it_update = 0; // Clear TIM_IT_UPDATE event flag
#if defined(TARGET_STM32L0)
volatile uint16_t cntH_old, cntH, cntL;
do {
// For some reason on L0xx series we need to read and clear the
// overflow flag which give extra time to propelry handle possible
// hiccup after ~60s
if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1OF) == SET) {
__HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1OF);
}
cntH_old = SlaveCounter;
if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
cntH_old += 1;
}
cntL = TIM_MST->CNT;
cntH = SlaveCounter;
if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
cntH += 1;
}
} while(cntH_old != cntH);
// Glue the upper and lower part together to get a 32 bit timer
counter = (uint32_t)(cntH << 16 | cntL);
#else
counter = TIM_MST->CNT + (uint32_t)(SlaveCounter << 16); // Calculate new time stamp
#endif
if (tim_it_update == 1) {
return tim_it_counter; // In case of TIM_IT_UPDATE return the time stamp that was calculated in timer_irq_handler()