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https://git.intern.spaceteamaachen.de/ALPAKA/sta-core.git
synced 2025-06-12 01:25:59 +00:00
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
#include <sta/devices/stm32/delay.hpp>
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#ifdef STA_PLATFORM_STM32
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#include <sta/devices/stm32/hal.hpp>
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#include <sta/devices/stm32/clocks.hpp>
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#include <sta/debug/assert.hpp>
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#include <sta/lang.hpp>
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namespace sta
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{
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void delayMs(uint32_t ms)
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{
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HAL_Delay(ms);
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}
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} // namespace sta
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#ifdef STA_STM32_DELAY_US_TIM
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#ifndef HAL_TIM_MODULE_ENABLED
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# error "STM32 HAL TIM module not enabled!"
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#endif // HAL_TIM_MODULE_ENABLED
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#include <tim.h>
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namespace sta
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{
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uint32_t gDelayUsMul = 1;
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bool isValidDelayUsTIM()
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{
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// Get PCLK multiplier for TIM clock
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uint32_t pclkMul = 1;
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switch (STA_STM32_DELAY_US_TIM.Init.ClockDivision)
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{
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case TIM_CLOCKDIVISION_DIV1:
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pclkMul = 1;
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break;
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case TIM_CLOCKDIVISION_DIV2:
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pclkMul = 2;
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break;
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case TIM_CLOCKDIVISION_DIV4:
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pclkMul = 4;
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break;
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default:
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STA_ASSERT(false);
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STA_UNREACHABLE();
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}
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// Calculate TIM clock frequency
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uint32_t clkFreq = pclkMul * STA_STM32_GET_HANDLE_PCLK_FREQ_FN(STA_STM32_DELAY_US_TIM)();
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// Calculate update frequency based on prescaler value
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uint32_t prescaler = (STA_STM32_DELAY_US_TIM.Init.Prescaler) ? STA_STM32_DELAY_US_TIM.Init.Prescaler : 1;
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uint32_t updateFreq = clkFreq / prescaler;
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gDelayUsMul = updateFreq / 1000000;
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// TIM must have at least microsecond precision (>= 1 MHz frequency)
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return (updateFreq >= 1000000);
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}
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void delayUs(uint32_t us)
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{
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// Check if the specified timer is usable for microsecond delays.
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STA_ASSERT(isValidDelayUsTIM());
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__HAL_TIM_SET_COUNTER(&STA_STM32_DELAY_US_TIM, 0);
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while (__HAL_TIM_GET_COUNTER(&STA_STM32_DELAY_US_TIM) < us * gDelayUsMul);
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}
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} // namespace sta
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#endif // STA_STM32_DELAY_US_TIM
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#endif // STA_PLATFORM_STM32
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