From 3ef44bff54e6f5e94b89bbd8afb5243075b668a0 Mon Sep 17 00:00:00 2001 From: Felix Ruess Date: Tue, 19 Feb 2013 19:22:49 +0100 Subject: [cm3] fix doxygen for systick_get_value, add systick_get_reload 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 --- examples/stm32/f1/lisa-m-2/can/can.c | 3 ++- examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'examples/stm32/f1/lisa-m-2') diff --git a/examples/stm32/f1/lisa-m-2/can/can.c b/examples/stm32/f1/lisa-m-2/can/can.c index 3ca01cf..01d65c3 100644 --- a/examples/stm32/f1/lisa-m-2/can/can.c +++ b/examples/stm32/f1/lisa-m-2/can/can.c @@ -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(); diff --git a/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c b/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c index dd2e221..7c53b8d 100644 --- a/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c +++ b/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c @@ -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(); -- cgit v1.2.3