void timerInit(uint8_t timer, int freqHz) {
// Enable interrupts for the timer (but not any of the timer updates yet)
nvicEnable(TIMER_MAP[timer].IRQn, 2);
timerInitHelper(timer, 1, TIMER_PERIOD(freqHz));
TIM_Cmd(TIMER_MAP[timer].TIMx, ENABLE);
}
void pinTimerInit(uint8_t pin) {
uint8_t timer = PIN_MAP[pin].timer;
nvicEnable(TIMER_MAP[timer].IRQn, 2);
// Use the frequency set using analogWriteFrequency
timerInitHelper(timer, 1, TIMER_PERIOD(TIMER_MAP[timer].freqHz));
TIM_Cmd(TIMER_MAP[timer].TIMx, ENABLE);
// FIXME: Advanced timers need to be specified in variant.cpp
// isAdvancedTimer() ir something
// http://www.disca.upv.es/aperles/arm_cortex_m3/curset/STM32F4xx_DSP_StdPeriph_Lib_V1.0.1/html/group___t_i_m___group4.html
#if defined(SERIES_STM32F4xx)
if (TIMER_MAP[timer].TIMx == TIM1) {
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
#endif
#if defined(SERIES_STM32F30x)
if (IS_TIM_LIST6_PERIPH(TIMER_MAP[timer].TIMx)) {
TIM_CtrlPWMOutputs(TIMER_MAP[timer].TIMx, ENABLE);
}
#endif
}
inline uint64_t usec() {
return (uint64_t)(1000000 * sec)
+ (MSEC_PER_SEC * msec)
+ (TIMER_PERIOD(USR_TIMER_FREQ) - MSS_TIM1_get_current_value()) / 50;
// TimVal * TimPeriod (us) / TimReloadVal
}
