时钟配置3 s% d h1 z, x1 U1 {7 t
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TIM配置
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3s一次中断0 z" o# y0 _0 ?6 z. S
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中断配置! d" k% q8 U8 u8 D3 ^
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开启
6 d7 g9 ^7 O' S, e/ \ - HAL_TIM_Base_Start_IT(&htim1);
复制代码- 任务中的临界区# I2 B7 B5 F% T: O# c# L0 w
- static void vTaskLED(void *pvParameters)
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- uint8_t data[]="LED";
& W) Y' J; \5 B. ^, t } - taskENTER_CRITICAL(); /* 进入临界区 */
* v& j+ f k6 }* b9 X; g k" R - HAL_UART_Transmit(&huart1,data,sizeof(data),0xff);
% c6 V4 g( ?) V t8 A - taskEXIT_CRITICAL(); /* 退出临界区 */
" O8 }8 T/ v; R* ^3 q. Y/ x: @ - HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_5);
' b5 d! O8 j# I7 w7 w - vTaskDelay(500);# s. C) b4 w( w3 o! Z+ r: y& \
- }
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复制代码- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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- if(htim->Instance==TIM1)5 a, m: z. u1 m$ Y
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- uint8_t data[]="TIM1 Interrupt";. U4 x& w# ^( i$ ?2 J) l# _" P; a
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- HAL_UART_Transmit(&huart1,data,sizeof(data),0xff);
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- }
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带有FreeRTOS
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8 I6 n- X! w+ i9 l4 v- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)( O, F5 q; p( a( j1 h
- {
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- BaseType_t xYieldRequired;
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- uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR(); /* 进入临界区*/) l9 U; V7 Z" q: q2 z- K
- {
q5 f3 L" n( H( [, j. k - /* 用户可以在这里添加临界段代码,我们这里暂时未用到*/; F2 w% y! s8 j# @$ {* c! M2 `
- if(htim->Instance==TIM1)
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/ U- N, c- o+ A. C6 R! e - uint8_t data[]="TIM1 Interrupt";
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5 j, h( O" `. x. a, _ |% H - HAL_UART_Transmit(&huart1,data,sizeof(data),0xff);. S: L2 L5 T5 [# g* N1 y: B, w
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- portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ); /* 退出临界区*/
/ K/ t+ E) z4 z - /** 恢复挂起任务*/( K9 _3 {# c& z/ g4 M3 F( t
- xYieldRequired = xTaskResumeFromISR(xHandleTaskLED);) S& \# y" O0 r% z6 }
- /* 退出中断后是否需要执行任务切换*/1 s% v; X! B/ \4 O3 v9 K# a+ Y* c7 Z4 X
- if( xYieldRequired == pdTRUE )9 k9 _8 }' R) W3 Y, h. _
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- portYIELD_FROM_ISR(xYieldRequired);7 e% t1 g3 Z% x
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- }
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