第一次用STM32串口多机通讯，不能成功唤醒，求指教
原理图就不贴了，就是两片STM32通过485连接，一主一从。设想是子机设定好地址后主机发送地址帧唤醒串口中断，然后接收后面的地址帧。实测发现无法唤醒。求指点原因。程序如下：
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USART1 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_9b;//多发送一位，TB9
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_ReceiverWakeUpCmd(USART1,ENABLE);//进入静默模式
USART_WakeUpConfig(USART1,USART_WakeUp_AddressMark);//设置唤醒模式为地址唤醒
/* 使能串口1接收中断 */
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//接收中断
{
...
}
}
int main(void)
{
...
USART1_Config(void)
USART_SetAddress(USART1,0x03);
...
}
发送部分：
void MasterToSlave_HandShake(unsigned char iSlaveID)
{
RS485BUS_Write;//485总线写状态
MasterToSlaveSendBuff=0x5a;
MasterToSlaveSendBuff=0xa5;
MasterToSlaveSendBuff=4;
MasterToSlaveSendBuff=0x10;
MasterToSlaveSendBuff=0x01;
MasterToSlaveSendBuff=iSlaveID;
MasterToSlaveSendBuff=0x01;
MasterToSlaveSendBuff=0x02;
MasterToSlaveSendLength=8;
MasterToSlaveSendCurrentByte=0;
MasterToSlave_SendStatus=MasterToSlave_SendStatus_Sending;
USART_SendData(USART1, (unsigned int)(MasterToSlaveSendBuff)|0x0100);//地址帧，TB9=1
USART_ITConfig(USART1, USART_IT_TC, ENABLE);//开发送中断
} 自顶一下，电路等各方面都没问题的，屏蔽了子机进入静默状态的语句就可以正常接收 qaya 发表于 2017-3-13 08:55
自顶一下，电路等各方面都没问题的，屏蔽了子机进入静默状态的语句就可以正常接收 ...
(引用自2楼)
串口的地址标记唤醒，第一个字节是地址，后面紧跟着数据，数据传送是不是只能传送小于128的，因为数据Bit7置位后，无法收到数据
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