Simplified getting timerClock

src/main/drivers/pwm_output_dshot.c

@@ -139,7 +139,7 @@ void pwmDigitalMotorHardwareConfig(const timerHardware_t *timerHardware, uint8_t
         RCC_ClockCmd(timerRCC(timer), ENABLE);
         TIM_Cmd(timer, DISABLE);
 
-        TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)((SystemCoreClock / timerClockDivisor(timer) / getDshotHz(pwmProtocolType)) - 1);
+        TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)((timerClock(timer) / getDshotHz(pwmProtocolType)) - 1);
         TIM_TimeBaseStructure.TIM_Period = MOTOR_BITLENGTH;
         TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
         TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

src/main/drivers/pwm_output_dshot_hal.c

@@ -123,7 +123,7 @@ void pwmDigitalMotorHardwareConfig(const timerHardware_t *timerHardware, uint8_t
     RCC_ClockCmd(timerRCC(timer), ENABLE);
 
     motor->TimHandle.Instance = timerHardware->tim;
-    motor->TimHandle.Init.Prescaler = (SystemCoreClock / timerClockDivisor(timer) / getDshotHz(pwmProtocolType)) - 1;
+    motor->TimHandle.Init.Prescaler = (timerClock(timer) / getDshotHz(pwmProtocolType)) - 1;;
     motor->TimHandle.Init.Period = MOTOR_BITLENGTH;
     motor->TimHandle.Init.RepetitionCounter = 0;
     motor->TimHandle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

src/main/drivers/timer.c

@@ -850,10 +850,10 @@ uint16_t timerGetPrescalerByDesiredMhz(TIM_TypeDef *tim, uint16_t mhz)
     if ((uint32_t)(mhz * 1000000) > (SystemCoreClock / timerClockDivisor(tim))) {
         return 0;
     }
-    return (uint16_t)(round((SystemCoreClock / timerClockDivisor(tim) / (mhz * 1000000)) - 1));
+    return (uint16_t)(round((timerClock(tim) / (mhz * 1000000)) - 1));
 }
 
 uint16_t timerGetPeriodByPrescaler(TIM_TypeDef *tim, uint16_t prescaler, uint32_t hertz)
 {
-    return ((uint16_t)((SystemCoreClock / timerClockDivisor(tim) / (prescaler + 1)) / hertz));
+    return ((uint16_t)((timerClock(tim) / (prescaler + 1)) / hertz));
 }

src/main/drivers/timer.h

@@ -181,6 +181,7 @@ void timerStart(void);
 void timerForceOverflow(TIM_TypeDef *tim);
 
 uint8_t timerClockDivisor(TIM_TypeDef *tim);
+uint32_t timerClock(TIM_TypeDef *tim);
 
 void configTimeBase(TIM_TypeDef *tim, uint16_t period, uint8_t mhz);  // TODO - just for migration
 

src/main/drivers/timer_stm32f10x.c

@@ -49,3 +49,9 @@ uint8_t timerClockDivisor(TIM_TypeDef *tim)
     UNUSED(tim);
     return 1;
 }
+
+uint32_t timerClock(TIM_TypeDef *tim)
+{
+    UNUSED(tim);
+    return SystemCoreClock;
+}

src/main/drivers/timer_stm32f30x.c

@@ -41,3 +41,9 @@ uint8_t timerClockDivisor(TIM_TypeDef *tim)
     UNUSED(tim);
     return 1;
 }
+
+uint32_t timerClock(TIM_TypeDef *tim)
+{
+    UNUSED(tim);
+    return SystemCoreClock;
+}

src/main/drivers/timer_stm32f4xx.c

@@ -91,3 +91,15 @@ uint8_t timerClockDivisor(TIM_TypeDef *tim)
         return 2;
     }
 }
+
+uint32_t timerClock(TIM_TypeDef *tim)
+{
+#if defined (STM32F40_41xxx)
+    if (tim == TIM8) return SystemCoreClock;
+#endif
+    if (tim == TIM1 || tim == TIM9 || tim == TIM10 || tim == TIM11) {
+        return SystemCoreClock;
+    } else {
+        return SystemCoreClock / 2;
+    }
+}

src/main/drivers/timer_stm32f7xx.c

@@ -80,3 +80,9 @@ uint8_t timerClockDivisor(TIM_TypeDef *tim)
     UNUSED(tim);
     return 1;
 }
+
+uint32_t timerClock(TIM_TypeDef *tim)
+{
+    UNUSED(tim);
+    return SystemCoreClock;
+}