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added a delay check and updated README

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This commit is contained in:
Iveta 2024-04-20 15:58:36 +03:00
parent 7cc6108a40
commit 3fe276f19d
4 changed files with 11 additions and 2 deletions
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7
README.md
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@ -85,6 +85,13 @@ Configuration:
TIM time base must be started before using `sta::delayUs` by calling `sta::initHAL`.
When using the startup system task this is handled automatically.
Steps to enable delayUs:
* Include sta/devices/stm32/delay.hpp in the file where the delayUs function is called
* Enable a timer TIM in .ioc file with the settings: Slave Mode=Disable, Trigger Mode=Disable, Clock Source=Internal Clock, all other channels =Disable)
* Define STA_STM32_DELAY_US_TIM in App/Inc/sta/config.hpp as the timer handle (can be found in Core/Inc/tim.h). For TIM1, this would be htim1
* Do not use this timer for delays of over 1000 us; we have delayMs for that
## Interfaces

2
include/sta/devices/stm32/delay.hpp
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@ -44,7 +44,7 @@ namespace sta
*
* @param us Microseconds
*/
void delayUs(uint32_t us);
void delayUs(uint16_t us);
#endif // STA_STM32_DELAY_US_TIM

1
include/sta/devices/stm32/init.hpp
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@ -5,6 +5,7 @@
#ifndef STA_CORE_STM32_INIT_HPP
#define STA_CORE_STM32_INIT_HPP
#include <sta/devices/stm32/hal.hpp>
namespace sta
{

3
src/devices/stm32/delay.cpp
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@ -62,10 +62,11 @@ namespace sta
return (updateFreq >= 1000000);
}
void delayUs(uint32_t us)
void delayUs(uint16_t us)
{
// Check if the specified timer is usable for microsecond delays.
STA_ASSERT(isValidDelayUsTIM());
STA_ASSERT(us < 1000);
__HAL_TIM_SET_COUNTER(&STA_STM32_DELAY_US_TIM, 0);
while (__HAL_TIM_GET_COUNTER(&STA_STM32_DELAY_US_TIM) < us * gDelayUsMul);