TM_DELAY

Delay library for STM32Fxxx devices - http://stm32f4-discovery.com/2015/07/hal-library-3-delay-for-stm32fxxx/. More...

Modules
	TM_DELAY_Macros
	Library defines.
	TM_DELAY_Typedefs
	Library Typedefs.
	TM_DELAY_Variables
	Library variables.
	TM_DELAY_Functions
	Library Functions.

Detailed Description

Delay library for STM32Fxxx devices - http://stm32f4-discovery.com/2015/07/hal-library-3-delay-for-stm32fxxx/.

Milliseconds delay

Milliseconds delay range is done using Systick interrupts which are made each 1ms. Interrupt handler Systick_Handler() function can be found in project file stm32fxxx_it.c file which should call HAL_IncTick(). This function is build in HAL drivers, but has weak parameter which means it can be replaced. It is replaced in TM_DELAY library.

Microseconds delay

Microseconds delay range is done using DWT cycle counter to get maximum possible accuracy in 1us delay range. This delay is not supported on STM32F0xx series, because Cortex-M0 does not have DWT section built-in.

Software timers

As mentioned in Milliseconds delay section, library has active Systick timer, which makes interrupt every 1 ms. This allows you also, to make software timers, which has resolution of 1 ms. I've added some support functions for software timers.

The main idea of software timers is that when timer reaches zero (timers are down-counters), callback function is called where user can do its work which should be done periodically, or only once if needed. Check TM_DELAY_Timer_Functions group with all functions which can be used for timers.

Changelog

 Version 1.0
  - First release

Dependencies

 - STM32Fxxx HAL
 - defines.h