定時器
extern u8 flag_200ms,timex;
extern vu16 USART3_RX_STA;
extern vu16 USART1_RX_STA;
void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
flag_200ms++;
timex=1;
TIM_ClearITPendingBit(TIM3, TIM_IT_Update );
}
}
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
USART3_RX_STA|=1<<15;
TIM_ClearITPendingBit(TIM2, TIM_IT_Update );
TIM_Cmd(TIM2, DISABLE);
}
}
void TIM4_IRQHandler(void)
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
{
USART1_RX_STA|=1<<15;
TIM_ClearITPendingBit(TIM4, TIM_IT_Update );
TIM_Cmd(TIM4, DISABLE);
}
}
void TIM2_Int_Init(u16 arr,u16 psc)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE );
TIM_Cmd(TIM1,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_Int_Init(u16 arr,u16 psc)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE );
TIM_Cmd(TIM3,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM4_Int_Init(u16 arr,u16 psc)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE );
TIM_Cmd(TIM4,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
串口1的配置
u8 USART1_RX_BUF[USART1_MAX_RECV_LEN];
u8 USART1_TX_BUF[USART1_MAX_SEND_LEN];
vu16 USART1_RX_STA=0;
void USART1_IRQHandler(void)
{
u8 Res;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Res =USART_ReceiveData(USART1);
while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);
USART_SendData(USART3,Res);
if((USART1_RX_STA&(1<<15))==0)
{
if(USART1_RX_STA<USART1_MAX_RECV_LEN)
{
TIM_SetCounter(TIM2,0);
if(USART1_RX_STA==0)
{
TIM_Cmd(TIM2,ENABLE);
}
USART1_RX_BUF[USART1_RX_STA++]=Res;
}else
{
USART1_RX_STA|=1<<15;
}
}
}
}
void usart_init(u32 bound)
{
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
USART_DeInit(USART1);
//USART1_TX PA9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//USART1_RX PA10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//????ê?è?
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = bound;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
//éè???D??ó??è??
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM4_Int_Init(2000-1,7200-1);
USART1_RX_STA=0;
TIM_Cmd(TIM4,DISABLE);
}
串口3的配置
u8 USART3_RX_BUF[USART3_MAX_RECV_LEN];
u8 USART3_TX_BUF[USART3_MAX_SEND_LEN];
vu16 USART3_RX_STA=0;
void USART3_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
{
res =USART_ReceiveData(USART3);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,res);
if((USART3_RX_STA&(1<<15))==0)
{
if(USART3_RX_STA<USART3_MAX_RECV_LEN)
{
TIM_SetCounter(TIM2,0);
if(USART3_RX_STA==0)
{
TIM_Cmd(TIM2,ENABLE);
}
USART3_RX_BUF[USART3_RX_STA++]=res;
}else
{
USART3_RX_STA|=1<<15;
}
}
}
}
void usart3_init(u32 bound)
{
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
USART_DeInit(USART3);
//USART3_TX PB10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB10
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure); //3?ê??ˉPB10
//USART3_RX PB11
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = bound;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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(USART3, &USART_InitStructure); /
USART_Cmd(USART3, ENABLE);
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM2_Int_Init(2000-1,7200-1);
USART3_RX_STA=0;
TIM_Cmd(TIM2,DISABLE);
}
int main(void)
{
delay_init();
LED_Init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
TIM3_Int_Init(2000,7200);//200ms
usart_init(115200);
usart3_init(115200);
while(1)
{
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