SYSTICK

This module contains low level functions for systick usage. More...

Files
file	stm32f103cb_systick.h
	Header file for stm32f103cb SYSTICK.

Macros
#define	SYSTICK   27
	This is a dummy define so that USB_coms() can use systick as a timer option.

Functions
mcu_error	SYSTICK_setup (uint32_t timeout, void(*handler)(void))
	Sets up systick and handler. More...
mcu_error	SYSTICK_timeout (uint32_t timeout)
	Change the systick timeout value. More...
void	SYSTICK_handler (void(*handler)(void))
	Sets the handler called on interrupt event. More...
uint32_t	SYSTICK_count (void)
	Get the current clock value. More...
void	SYSTICK_stop (void)
	Stop the systick counter. More...
void	SYSTICK_start (void)
	Start the systick counter. More...

Detailed Description

This module contains low level functions for systick usage.

Author

Stuart Ianna

Version

0.1

Date

June 2018

Copyright

GNU GPLv3

Warning

None

Bug:

Todo:

Compilers

• arm-none-eabi-gcc (15:4.9.3+svn231177-1) 4.9.3 20150529 (prerelease)

Example Usage

#include <stm32f103cb_core.h>

void flash(void);

int main(void)
{

    //Enable LED pin
    pinSetup(GPIO_DO,PORTC,PIN13);

    //Setup systick timeout and handler, handler must be void(*handler)(void)
    SYSTICK_setup(500000,&flash);

    //Done
    while (1);

    return 0;
}

//This gets called on systick timeout
void flash(void){

    pinToggle(PORTC,PIN13);
}

Function Documentation

uint32_t SYSTICK_count

(

void

)

Get the current clock value.

Returns

The current value of the clock.

Definition at line 91 of file stm32f103cb_systick.c.

void SYSTICK_handler

(

void(*)(void)

handler

)

Sets the handler called on interrupt event.

Parameters

handler

The function to be called on interrupt event

Returns

none

Definition at line 78 of file stm32f103cb_systick.c.

mcu_error SYSTICK_setup	(	uint32_t	timeout,
		void(*)(void)	handler
	)

Sets up systick and handler.

This function checks if the timeout value specified is possible, defaults to ..... if not.

Parameters

timeout	The desired timeout in microseconds
handler	The function to be called on interrupt event

Returns

Error code define by mcu_error, SYSTICK_NOERROR if no error, SYSTICK_TOSHORT if timeout value is too small

Definition at line 23 of file stm32f103cb_systick.c.

void SYSTICK_start

(

void

)

Start the systick counter.

Systick counter must have been set up with SYSTICK_setup() before this is used.

Returns

The current value of the clock.

Definition at line 102 of file stm32f103cb_systick.c.

void SYSTICK_stop

(

void

)

Stop the systick counter.

Returns

The current value of the clock.

Definition at line 108 of file stm32f103cb_systick.c.

mcu_error SYSTICK_timeout

(

uint32_t

timeout

)

Change the systick timeout value.

This function checks if the timeout value specified is possible, defaults to ..... if not.

Parameters

timeout

The desired timeout in microseconds

Returns

Error code define by mcu_error, SYSTICK_NOERROR if no error, SYSTICK_TOOLONG if timeout value is too small

Definition at line 33 of file stm32f103cb_systick.c.