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- 积分
- 2795
- 金钱
- 2795
- 注册时间
- 2015-12-30
- 在线时间
- 343 小时
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1金钱
使用PA2,PA3做为功能脚,发现串口发送串口助手一直收不到数据,使用串口助手给单片机发送,单片机能正确的接收,是哪里的问题?
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = bound;//2¨ìØÂêéèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8λêy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí£Ö1λ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæżD£Ñéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·¢Ä£ê½
USART_Init(USART2, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
USART_Cmd(USART2, ENABLE); //ê1Äü′®¿ú1
USART_ClearFlag(USART2, USART_FLAG_TC);
#if EN_USART2_RX
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//¿aÆôÏà1ØÖD¶Ï
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//′®¿ú1ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇàÕ¼óÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //×óóÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡¢
#endif
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