【经验分享】STM32L0 串口uart通讯 USART1_IRQHandler

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STMCU小助手发布时间：2021-11-18 22:00

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文章简介:	使用stm32 cubx 生成工程后发现USART1_IRQHandler 中断不能进入。

使用stm32 cubx 生成工程后发现USART1_IRQHandler 中断不能进入。

下面这段代码进不去：

void USART1_IRQHandler(void)
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{
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/* USER CODE BEGIN USART1_IRQn 0 */
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/* USER CODE END USART1_IRQn 0 */" L: v6 i+ @3 f7 N) m, \
HAL_UART_IRQHandler(&huart1);
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/* USER CODE BEGIN USART1_IRQn 1 */# O2 E+ A- q) p. I4 g
HAL_UART_Receive_IT(&huart1, recive_buf, 10);# k4 k+ F& i5 H$ ?4 z" e% y+ [! u
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);- Q5 [( H" \, o2 A3 d# ? }4 F
/* USER CODE END USART1_IRQn 1 */
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}

复制代码

于是添加红色部分，能够进入中断，完成数据接收

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(uartHandle->Instance==USART1)* p0 `' m4 p9 U: ?2 C
{
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/* USER CODE BEGIN USART1_MspInit 0 */) H; p" t) @; o+ Z. Q1 g& P7 l, G
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/* USER CODE END USART1_MspInit 0 */# M* X% i# g S3 R* X- T
/* USART1 clock enable */
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__HAL_RCC_USART1_CLK_ENABLE();& W& x8 ]2 x% q5 r! t' i
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__HAL_RCC_GPIOA_CLK_ENABLE();
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX! W" K6 b. ^2 L6 I% A
PA10 ------> USART1_RX
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;3 |! @8 I6 O8 L0 x
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;5 m; S& J' ?3 [4 {' i
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Alternate = GPIO_AF4_USART1;* T) ^; w% G7 u8 b
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* USART1 interrupt Init */: q4 n) [5 y$ x T4 [! A
HAL_NVIC_SetPriority(USART1_IRQn, 3, 0);
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HAL_NVIC_EnableIRQ(USART1_IRQn);
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// SET_BIT(USART1->ICR, USART_ICR_TCCF); /* ȥԽTCע̍ΪԉҪ־ */
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// SET_BIT(USART1->RQR, USART_RQR_RXFRQ); /* ȥԽRXNEޓ˕Ҫ־ */
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// SET_BIT(USART1->CR1, USART_CR1_RXNEIE); /* ʹŜPE. RXޓ˜א׏ */
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/* USER CODE BEGIN USART1_MspInit 1 */. U1 G0 e z) L6 d! W0 X; r- o
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/* USER CODE END USART1_MspInit 1 */
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else if(uartHandle->Instance==USART2)
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/* USER CODE BEGIN USART2_MspInit 0 */, ?* [9 r+ l; i& Y9 ]+ } {! P2 @
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/* USER CODE END USART2_MspInit 0 */
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/* USART2 clock enable */) W9 K) k. P" J# s( E# V3 q
__HAL_RCC_USART2_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();9 P' B& N% J" ~* {$ L
/**USART2 GPIO Configuration % S1 p6 @) v# z# \
PA2 ------> USART2_TX
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PA3 ------> USART2_RX
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*/) P; l* M4 a) ^8 Y1 h7 \/ H+ u
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;0 F( U7 w9 E0 I+ o2 s/ W% s
GPIO_InitStruct.Alternate = GPIO_AF4_USART2;/ q1 |, y' _# W3 g- D/ J I
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);2 G# X# g6 x: I+ I
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/* USART2 interrupt Init */
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HAL_NVIC_SetPriority(USART2_IRQn, 3, 0);
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HAL_NVIC_EnableIRQ(USART2_IRQn);8 {. @! R f7 W. d3 K
/* USER CODE BEGIN USART2_MspInit 1 */" W+ a$ U0 O$ t0 ?: |0 m3 o
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SET_BIT(USART2->ICR, USART_ICR_TCCF); /* 清除TC发送完成标志*/- W, l0 m v9 t- t/ g+ G% f
SET_BIT(USART2->RQR, USART_RQR_RXFRQ); /*־清除RXNE接收标志*/7 c) J& u1 ~+ K5 ~0 i6 K% Y
SET_BIT(USART2->CR1, USART_CR1_RXNEIE); /* 使能PERX接收中断*/
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/* USER CODE END USART2_MspInit 1 */1 W+ R# C0 V% a' ]4 L0 m) n
}
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}