From 4a39c8cd53eb1509e5b39d45f18220d3ae0d3410 Mon Sep 17 00:00:00 2001 From: Jason Smith Date: Sun, 1 Nov 2020 01:39:30 -0700 Subject: [PATCH] Get STM32 clock rates from framework (#19978) Co-authored-by: Scott Lahteine --- Marlin/src/HAL/STM32/timers.cpp | 14 +++++++++----- Marlin/src/HAL/STM32/timers.h | 3 ++- Marlin/src/pins/stm32f4/pins_RUMBA32_common.h | 1 - 3 files changed, 11 insertions(+), 7 deletions(-) diff --git a/Marlin/src/HAL/STM32/timers.cpp b/Marlin/src/HAL/STM32/timers.cpp index b708c4bda..442aa74d1 100644 --- a/Marlin/src/HAL/STM32/timers.cpp +++ b/Marlin/src/HAL/STM32/timers.cpp @@ -68,26 +68,23 @@ #endif #ifdef STM32F0xx - #define MCU_TIMER_RATE (F_CPU) // Frequency of timer peripherals #define MCU_STEP_TIMER 16 #define MCU_TEMP_TIMER 17 #elif defined(STM32F1xx) - #define MCU_TIMER_RATE (F_CPU) #define MCU_STEP_TIMER 4 #define MCU_TEMP_TIMER 2 #elif defined(STM32F401xC) || defined(STM32F401xE) - #define MCU_TIMER_RATE (F_CPU / 2) #define MCU_STEP_TIMER 9 #define MCU_TEMP_TIMER 10 #elif defined(STM32F4xx) || defined(STM32F7xx) - #define MCU_TIMER_RATE (F_CPU / 2) #define MCU_STEP_TIMER 6 // STM32F401 has no TIM6, TIM7, or TIM8 #define MCU_TEMP_TIMER 14 // TIM7 is consumed by Software Serial if used. #endif #ifndef HAL_TIMER_RATE - #define HAL_TIMER_RATE MCU_TIMER_RATE + #define HAL_TIMER_RATE GetStepperTimerClkFreq() #endif + #ifndef STEP_TIMER #define STEP_TIMER MCU_STEP_TIMER #endif @@ -115,6 +112,13 @@ HardwareTimer *timer_instance[NUM_HARDWARE_TIMERS] = { nullptr }; // Public functions // ------------------------ +uint32_t GetStepperTimerClkFreq() { + // Timer input clocks vary between devices, and in some cases between timers on the same device. + // Retrieve at runtime to ensure device compatibility. Cache result to avoid repeated overhead. + static uint32_t clkfreq = timer_instance[STEP_TIMER_NUM]->getTimerClkFreq(); + return clkfreq; +} + // frequency is in Hertz void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) { if (!HAL_timer_initialized(timer_num)) { diff --git a/Marlin/src/HAL/STM32/timers.h b/Marlin/src/HAL/STM32/timers.h index 5515219ea..de762794e 100644 --- a/Marlin/src/HAL/STM32/timers.h +++ b/Marlin/src/HAL/STM32/timers.h @@ -57,7 +57,8 @@ // TODO: get rid of manual rate/prescale/ticks/cycles taken for procedures in stepper.cpp #define STEPPER_TIMER_RATE 2000000 // 2 Mhz -#define STEPPER_TIMER_PRESCALE ((HAL_TIMER_RATE)/(STEPPER_TIMER_RATE)) +extern uint32_t GetStepperTimerClkFreq(); +#define STEPPER_TIMER_PRESCALE (GetStepperTimerClkFreq() / (STEPPER_TIMER_RATE)) #define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs #define PULSE_TIMER_RATE STEPPER_TIMER_RATE diff --git a/Marlin/src/pins/stm32f4/pins_RUMBA32_common.h b/Marlin/src/pins/stm32f4/pins_RUMBA32_common.h index 9a6a16516..eee0094ea 100644 --- a/Marlin/src/pins/stm32f4/pins_RUMBA32_common.h +++ b/Marlin/src/pins/stm32f4/pins_RUMBA32_common.h @@ -47,7 +47,6 @@ #define STEP_TIMER 10 #define TEMP_TIMER 14 -#define HAL_TIMER_RATE F_CPU // // Limit Switches