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Merge pull request #124 from juribeparada/master 

Better way for sampling frequency calculation for MMDVM-Pi
nxdn
Jonathan Naylor 2017-10-16 09:23:58 +01:00 committed by GitHub
parent 9cfbdebc7b 2279162db5
commit 8d7b4ef84d
1 changed files with 3 additions and 2 deletions
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5
IOSTM.cpp
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@ -642,12 +642,13 @@ void CIO::startInt()
// TIM2 output frequency // TIM2 output frequency
#if defined(EXTERNAL_OSC) && !defined(STM32F4_PI) #if defined(EXTERNAL_OSC) && !defined(STM32F4_PI)
timerInitStructure.TIM_Prescaler = (uint16_t) ((EXTERNAL_OSC/(2*SAMP_FREQ)) - 1); timerInitStructure.TIM_Prescaler = (uint16_t) ((EXTERNAL_OSC/(2*SAMP_FREQ)) - 1);
timerInitStructure.TIM_Period = 1;
#else #else
timerInitStructure.TIM_Prescaler = (uint16_t) ((SystemCoreClock/(4*SAMP_FREQ)) - 1); timerInitStructure.TIM_Prescaler = (uint16_t) ((SystemCoreClock/(6*SAMP_FREQ)) - 1);
timerInitStructure.TIM_Period = 2;
#endif #endif
timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up; timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
timerInitStructure.TIM_Period = 1;
timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1; timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
timerInitStructure.TIM_RepetitionCounter = 0; timerInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &timerInitStructure); TIM_TimeBaseInit(TIM2, &timerInitStructure);