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[cm3] fix doxygen for systick_get_value, add systick_get_reload

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Fix the reload value in the examples:
to get a SysTick interrupt every N clock pulses: set reload to N-1
see http://infocenter.arm.com/help/topic/com.arm.doc.dui0552a/BGBEEJHC.html#BABGACGG
This commit is contained in:
Felix Ruess 2013-02-19 19:22:49 +01:00
parent 46263e90b4
commit 3ef44bff54
13 changed files with 36 additions and 13 deletions
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3
examples/stm32/f1/lisa-m-1/can/can.c
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@ -91,7 +91,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c
View File

@ -241,7 +241,8 @@ static void hid_set_config(usbd_device *usbd_dev, u16 wValue)
#endif
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
systick_set_reload(100000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(99999);
systick_interrupt_enable();
systick_counter_enable();
}

3
examples/stm32/f1/lisa-m-2/can/can.c
View File

@ -91,7 +91,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c
View File

@ -223,7 +223,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/obldc-strip/can/can.c
View File

@ -75,7 +75,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 8000000/8000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(8000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(7999);
systick_interrupt_enable();

3
examples/stm32/f1/obldc-strip/systick/systick.c
View File

@ -68,7 +68,8 @@ int main(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 8000000/8000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(8000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(7999);
systick_interrupt_enable();

3
examples/stm32/f1/obldc/can/can.c
View File

@ -79,7 +79,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/obldc/systick/systick.c
View File

@ -77,7 +77,8 @@ int main(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/other/systick/systick.c
View File

@ -62,7 +62,8 @@ int main(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/other/usb_hid/usbhid.c
View File

@ -238,7 +238,8 @@ static void hid_set_config(usbd_device *usbd_dev, u16 wValue)
#endif
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
systick_set_reload(100000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(99999);
systick_interrupt_enable();
systick_counter_enable();
}

3
examples/stm32/f1/stm32-h103/usart_irq_printf/usart_irq_printf.c
View File

@ -222,7 +222,8 @@ void systick_setup(void)
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
systick_set_reload(9000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(8999);
systick_interrupt_enable();

3
examples/stm32/f1/stm32-h103/usb_hid/usbhid.c
View File

@ -236,7 +236,8 @@ static void hid_set_config(usbd_device *usbd_dev, u16 wValue)
#endif
systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
systick_set_reload(100000);
/* SysTick interrupt every N clock pulses: set reload to N-1 */
systick_set_reload(99999);
systick_interrupt_enable();
systick_counter_enable();
}

13
lib/cm3/systick.c
View File

@ -60,9 +60,20 @@ void systick_set_reload(u32 value)
@returns 24 bit reload value as u32.
*/
u32 systick_get_reload(void)
{
return (STK_LOAD & 0x00FFFFFF);
}
/*-----------------------------------------------------------------------------*/
/** @brief Get the current SysTick counter value.
@returns 24 bit current value as u32.
*/
u32 systick_get_value(void)
{
return STK_VAL;
return (STK_VAL & 0x00FFFFFF);
}
/*-----------------------------------------------------------------------------*/