void TIM4_IRQHandler(void) { if(TIM4->SR & 0X01) { TIM4->SR &= ~(1 << 0); count++; } }
时间: 2024-05-21 16:12:37 浏览: 17
(void TIM4_IRQHandler(void) {
if(TIM4->SR & TIM_SR_UIF) {
// UIF flag is set, indicating timer overflow
// Handle timer overflow event here
TIM4->SR &= ~TIM_SR_UIF; // Clear UIF flag
}
}
This is an interrupt service routine (ISR) for the TIM4 timer interrupt. It checks whether the Update Interrupt Flag (UIF) is set in the TIM4 status register (SR). If the flag is set, it means that the timer has overflowed and the ISR handles the timer overflow event.
The last line of the ISR clears the UIF flag by writing a 0 to it. This is important to prevent the ISR from being triggered again immediately after it has finished executing.
相关问题
void OscDispAutoMagic(unsigned char Data,u32 SizeX,u32 SizeY,u32 OffsetX,u32 OffsetY) { static u32 pos=0; static s32 x=0,y=0,z=0; static u32 id=0; #ifdef PWMlightMode if(id==0) { PAout(7)=0; #endif DAC->DHR12RD=MapData[LDcnt]; LDcnt++; if(LDcnt>=LDlen) { LDcnt=0; PAout(6)=0; } else PAout(6)=1; #ifdef PWMlightMode } else PAout(7)=1; id=(id+1)%2; #endif } u8 DispPoi=0; void TIM3_IRQHandler(void)//当 TIM3 定时器发生中断时,它会清除中断标志位,并以特定参数调用 OscDispAutoMagic 函数。 { if(TIM3->SR) { TIM3->SR=0; OscDispAutoMagic((u8)0,64,64,0,0); } } extern int Msg_PathFin; #define DPMax2 (MaxDots*2) extern u8 DotPath[DPMax2]; int main(void) { int i=0; //float x,y; Stm32_Clock_Init(9); //系统时钟设置 uart_init(72,115200); //串口初始化为115200 delay_init(72);//延时初始化 Timer3_Init(); Timer2_Init(); DAC_Init(); GPIOA->CRL&=0x00FFFFFF; GPIOA->CRL|=0x33000000; PAout(6)=0; PAout(7)=1; GPIOA->CRH&=0x00FFFFF0; GPIOA->CRH|=0x88000003; PAout(8)=1; MapData[0]=XYc_OutputInv(1000,1000); MapData[1]=XYc_OutputInv(1500,1000); MapData[2]=XYc_OutputInv(2000,1000); LDlen=3; delay_ms(5000); PAout(8)=1; while(1) { if(Msg_PathFin) { LDlen=3; for(i=0;i<Msg_PathFin;i++) { MapData[i]=XYc_Output(DotPath[2*i+1]24,DotPath[2i]*24); } if(Msg_PathFin>=MaxDots)LDlen=MaxDots; else if(Msg_PathFin>=3)LDlen=Msg_PathFin; else LDlen=Msg_PathFin+2; Msg_PathFin=0; } } } 修改代码,控制振镜XY改为控制振镜X,读取数组中值,当读取到1振镜x向左偏振,读到0振镜x向右偏转
根据你的要求,我修改了代码,使其只控制振镜X,并根据读取到的数组值决定振镜X偏转方向。以下是修改后的代码:
```cpp
void OscDispAutoMagic(unsigned char Data, u32 SizeX, u32 SizeY, u32 OffsetX, u32 OffsetY) {
static u32 pos = 0;
static s32 x = 0, y = 0, z = 0;
static u32 id = 0;
#ifdef PWMlightMode
if (id == 0) {
PAout(7) = 0;
}
#endif
if (DotPath[pos] == 1) { // 如果读取到1,振镜X向左偏转
x -= 24;
} else if (DotPath[pos] == 0) { // 如果读取到0,振镜X向右偏转
x += 24;
}
DAC->DHR12RD = XYc_Output(x, y);
pos = (pos + 1) % DPMax2;
#ifdef PWMlightMode
}
else PAout(7) = 1;
id = (id + 1) % 2;
#endif
}
u8 DispPoi = 0;
void TIM3_IRQHandler(void) {
if (TIM3->SR) {
TIM3->SR = 0;
OscDispAutoMagic((u8)0, 64, 64, 0, 0);
}
}
extern int Msg_PathFin;
#define DPMax2 (MaxDots*2)
extern u8 DotPath[DPMax2];
int main(void) {
int i = 0;
Stm32_Clock_Init(9);
uart_init(72, 115200);
delay_init(72);
Timer3_Init();
Timer2_Init();
DAC_Init();
GPIOA->CRL &= 0x00FFFFFF;
GPIOA->CRL |= 0x33000000;
PAout(6) = 0;
PAout(7) = 1;
GPIOA->CRH &= 0x00FFFFF0;
GPIOA->CRH |= 0x88000003;
PAout(8) = 1;
MapData[0] = XYc_OutputInv(1000, 1000);
MapData[1] = XYc_OutputInv(1500, 1000);
MapData[2] = XYc_OutputInv(2000, 1000);
LDlen = 3;
delay_ms(5000);
PAout(8) = 1;
while (1) {
if (Msg_PathFin) {
LDlen = 3;
for (i = 0; i < Msg_PathFin; i++) {
if (DotPath[2 * i] == 1) { // 如果读取到1,振镜X向左偏转
MapData[i] = XYc_Output(DotPath[2 * i + 1] * 24, x);
} else if (DotPath[2 * i] == 0) { // 如果读取到0,振镜X向右偏转
MapData[i] = XYc_Output(DotPath[2 * i + 1] * 24, x);
}
}
if (Msg_PathFin >= MaxDots) LDlen = MaxDots;
else if (Msg_PathFin >= 3) LDlen = Msg_PathFin;
else LDlen = Msg_PathFin + 2;
Msg_PathFin = 0;
}
}
}
```
请注意,我只根据你提供的要求修改了代码中涉及振镜X控制的部分,其他部分保持不变。请在实际使用时进行适当的调整和测试。
帮我写一个用stm32接收HC-SR04超声波模块的数据的代码
以下是一个使用STM32接收HC-SR04超声波模块数据的示例代码:
```c
#include "stm32f10x.h"
#define TRIG_PIN GPIO_Pin_8
#define TRIG_PORT GPIOA
#define ECHO_PIN GPIO_Pin_0
#define ECHO_PORT GPIOB
void TIM3_IRQHandler(void)
{
static uint32_t start_time = 0;
static uint32_t end_time = 0;
static uint8_t capture_done = 0;
static uint32_t distance = 0;
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)
{
if (!capture_done)
{
start_time = TIM_GetCapture1(TIM3);
capture_done = 1;
TIM_SetCounter(TIM3, 0);
}
else
{
end_time = TIM_GetCapture1(TIM3);
capture_done = 0;
distance = (end_time - start_time) / 58;
}
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
}
}
void HC_SR04_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = TRIG_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(TRIG_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = ECHO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(ECHO_PORT, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 71;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x0;
TIM_ICInit(TIM3, &TIM_ICInitStructure);
TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int main(void)
{
HC_SR04_Init();
while (1)
{
GPIO_SetBits(TRIG_PORT, TRIG_PIN);
Delay(10);
GPIO_ResetBits(TRIG_PORT, TRIG_PIN);
Delay(100);
printf("Distance: %d cm\n", distance);
}
}
```
其中,`HC_SR04_Init()`函数用于初始化GPIO和TIM3,使其能够与HC-SR04超声波模块通信。`TIM3_IRQHandler()`函数用于捕获TIM3的输入捕获事件,并计算出超声波的传播时间和距离。在主函数中,通过向TRIG引脚发送一个10us的高电平来触发超声波发射,然后等待100ms后读取距离数据。可以根据实际需要调整发射和等待时间。
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