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stm32f1: Serial should have a higher irq priority than timers 

It's possible for the code to stay in the timer irq for up to 100ms,
so serial irqs should have a higher irq priority to prevent them from
being starved.  (The timer code disables irqs during event dispatch,
so serial irqs would only be permitted between events anyway.)

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-10-03 11:55:08 -04:00
parent d32506bd2e
commit 1302514ea8
2 changed files with 2 additions and 3 deletions
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2
src/stm32f1/serial.c
View File

@ -29,8 +29,8 @@ serial_init(void)
LL_USART_SetHWFlowCtrl(USART1, LL_USART_HWCONTROL_NONE);
LL_USART_SetTransferDirection(USART1, LL_USART_DIRECTION_TX_RX);
LL_USART_EnableIT_RXNE(USART1);
NVIC_SetPriority(USART1_IRQn, 0);
NVIC_EnableIRQ(USART1_IRQn);
NVIC_SetPriority(USART1_IRQn, 1);
LL_USART_Enable(USART1);
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA);

3
src/stm32f1/timer.c
View File

@ -8,7 +8,6 @@
#include "autoconf.h"
#include "board/misc.h" // timer_from_us
#include "stm32f1xx.h"
#include "stm32f1xx.h"
#include "stm32f1xx_ll_bus.h"
#include "stm32f1xx_ll_tim.h"
#include "command.h" // shutdown
@ -96,8 +95,8 @@ timer_init(void)
LL_TIM_SetAutoReload(TIM2, 0xFFFF);
LL_TIM_EnableIT_CC1(TIM2);
LL_TIM_CC_EnableChannel(TIM2, LL_TIM_CHANNEL_CH1);
NVIC_SetPriority(TIM2_IRQn, 2);
NVIC_EnableIRQ(TIM2_IRQn);
NVIC_SetPriority(TIM2_IRQn, 0);
timer_kick();
timer_reset();
LL_TIM_EnableCounter(TIM2);