PWM视频演示
视频地址：http://player.youku.com/player.php/sid/XODQ1MjUxNjI0/v.swf
#include "stm32_eval.h"
#include <stdio.h>
#define VREF 3.3
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
unsigned char i=0;
unsigned char count=0;
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*********************************/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
int Display[10]={ GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8,
GPIO_Pin_9|GPIO_Pin_12,
GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5,
GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_8|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12,
GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14,
GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14 };
void Dis_number(unsigned char i)
{
char one=0,ten=0;
one=i%10; ten=i/10;
GPIO_SetBits(GPIOB,GPIO_Pin_1);
GPIO_ResetBits(GPIOB,Display[one]);
delay_ms(10);
GPIO_ResetBits(GPIOB,GPIO_Pin_1);
GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);
GPIO_SetBits(GPIOB,GPIO_Pin_15);
GPIO_ResetBits(GPIOB,Display[ten]);
delay_ms(10);
GPIO_ResetBits(GPIOB,GPIO_Pin_15);
GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);
}
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
RCC_HSEConfig(RCC_HSE_OFF);
RCC_LSEConfig(RCC_LSE_OFF);
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); //72HMz
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
//SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);//蜂鸣器
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
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);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = BaudRate;//??????
USART_InitStructure.USART_BaudRate = BaudRate;//usart传输波比特
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或接收8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输1个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶失能
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收使能，发送使能
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;//始终低电平
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二边缘进行数据捕获
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟不从SCLK输出
USART_ClockInit(USART1, &USART_ClockInitStructure);//使能USART1时钟
USART_Init(USART1, &USART_InitStructure);//初始化USART1
USART_Cmd(USART1, ENABLE);//使能USART1外设
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能中断
USART_Cmd(USART1, ENABLE);
/* Configure four bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void GPIO_INIT()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void Iic1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
//PB6-I2C2_SCL PB7-I2C2_SDA PB10-I2C2_SCL PB11-I2C2_SDA
/* Configure IO connected to IIC*********************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;//配置I2C模式
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;//该参数只有在I2C工作在快速模式下有意义
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;//设置第一个设备自身地址
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;//使能应答
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;//地址为7位
I2C_InitStructure.I2C_ClockSpeed = 400000;//时钟速率 400KHZ
I2C_Cmd(I2C2, ENABLE);
I2C_Init(I2C2, &I2C_InitStructure);
I2C_AcknowledgeConfig(I2C2, ENABLE);
}
void I2C2_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)
{
while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C2,ENABLE);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C2, write_address);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C2, byte);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C2, ENABLE);
do
{
/* Send START condition */
I2C_GenerateSTART(I2C2, ENABLE);
/* Read I2C2 SR1 register */
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter);
}while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002));
/* Clear AF flag */
I2C_ClearFlag(I2C2, I2C_FLAG_AF);
/* STOP condition */
I2C_GenerateSTOP(I2C2, ENABLE);
}
unsigned char I2C2_ReadByte(unsigned char id, unsigned char read_address)
{
unsigned char temp;
while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){}
I2C_GenerateSTART(I2C2, ENABLE);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_Cmd(I2C2, ENABLE);
I2C_SendData(I2C2, read_address);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C2, ENABLE);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
I2C_AcknowledgeConfig(I2C2, DISABLE);
I2C_GenerateSTOP(I2C2, ENABLE);
while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));
temp = I2C_ReceiveData(I2C2);
I2C_AcknowledgeConfig(I2C2, ENABLE);
return temp;
}
void EXTIkeyS1_Config(void)
{
/* Enable GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PA.00 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
/* Connect EXTI0 Line to PA.00 pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);
/* Configure EXTI0 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line8;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI0 Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI9_5_IRQHandler(void) //s1
{
if(EXTI_GetITStatus(EXTI_Line8) != RESET)
{
i++;
I2C2_WriteByte(0xA0,0,i);
EXTI_ClearITPendingBit(EXTI_Line8);
}
}
int main(void)
{
RCC_Configuration();
USART_int(115200);
GPIO_INIT();
Iic1_Init();
EXTIkeyS1_Config();
printf(" config done...\r\n");
delay_ms(1000);
while(1)
{
count=I2C2_ReadByte(0xA0,0);
Dis_number(count);
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
IIC
SPI
#include <stm32f10x.h>
#include "stm32_eval.h"
#include <stdio.h>
#include "spi_flash.h"
#define VREF 3.3
#define TxBufferSize1 (countof(TxBuffer1) - 1)
#define RxBufferSize1 (countof(TxBuffer1) - 1)
#define countof(a) (sizeof(a) / sizeof(*(a)))
#define BufferSize (countof(Tx_Buffer)-1)
typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
#define FLASH_WriteAddress 0x00000
#define FLASH_ReadAddress FLASH_WriteAddress
#define FLASH_SectorToErase FLASH_WriteAddress
#define sFLASH_ID 0xEF3015 //W25X16
//#define sFLASH_ID 0xEF4015 //W25Q16
#define buff_size 16;
char rx_buff_count=0;
uint8_t Tx_Buffer[4096] ; //发送缓冲
uint8_t Rx_Buffer[BufferSize]; //接受缓冲
__IO uint32_t DeviceID = 0; //装置ID
__IO uint32_t FlashID = 0; //闪存ID
__IO TestStatus TransferStatus1 = FAILED; //状态测试
/**************延时函数*******************/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
void Delay(__IO uint32_t nCount);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
char *int_to_string(int number,char *strnum)//整形数据转换为字符型
{
int j=0,i=0,n=0;
char temp;
while(number>0)
{
*(strnum+j)=number%10+48;
j++;
number=number/10;
n++;
}
for(i=0;i<n/2;i++)
{
temp=*(strnum+j+i-n);
*(strnum+j+i-n)=*(strnum+j-i-1);
*(strnum+j-i-1)=temp;
}
strnum[n]='\0';
return strnum;
}
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_DeInit();//将RCC寄存器重设为缺省值
RCC_HSICmd(ENABLE);//使能内部高速晶振
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);//HSI晶振返回reset
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);//选择HSI作为系统时钟
RCC_HSEConfig(RCC_HSE_OFF);//HSE晶振关
RCC_LSEConfig(RCC_LSE_OFF);//LSE晶振关
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); // 72HMz
RCC_PLLCmd(ENABLE);//使能PLL状态
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);//ADC时钟=PCLK/4
RCC_PCLK2Config(RCC_HCLK_Div1);//APB2时钟=HCLK
RCC_PCLK1Config(RCC_HCLK_Div2);//APB1时钟=HCLK/2
RCC_HCLKConfig(RCC_SYSCLK_Div1);//AHB时钟=系统时钟
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//选择PLL作为系统时钟
while(RCC_GetSYSCLKSource() != 0x08);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);//关闭蜂鸣器
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
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);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = BaudRate;
USART_InitStructure.USART_BaudRate = BaudRate;//usart传输波比特
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或接收8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输1个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶失能
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收使能，发送使能
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;//始终低电平
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二边缘进行数据捕获
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟不从SCLK输出
USART_ClockInit(USART1, &USART_ClockInitStructure);//使能USART1时钟
USART_Init(USART1, &USART_InitStructure);//初始化USART1
USART_Cmd(USART1, ENABLE);//使能USART1外设
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能中断
USART_Cmd(USART1, ENABLE);
}
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while(BufferLength--)
{
if(*pBuffer1 != *pBuffer2)
{
return FAILED;
}
pBuffer1++;
pBuffer2++;
}
return PASSED;
}
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
void ADC_CONFIG(){
ADC_InitTypeDef ADC_InitStructure;
#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
/* ADCCLK = PCLK2/2 */
RCC_ADCCLKConfig(RCC_PCLK2_Div2);
#else
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
#endif
ADC_DeInit(ADC1);
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB, ENABLE);
/* Configure PB0 (ADC Channel14) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
}
int Get_ADC(){
/* ADC1 regular channel configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_55Cycles5);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
return ADC_GetConversionValue(ADC1);
}
void SPI_TEST()
{
int i=0;
int ADValue = 0;
float Volt=0.00;
char shuzu[100];
for(i=0;i<5;i++){
ADValue = Get_ADC();
Volt = VREF*ADValue/4095;
printf("===============================\r\n");
printf("The ADC value is:%d\r\n",ADValue);
printf("The Volt is:%f V\r\n",Volt);
delay_ms(500);
}
printf("\r\n这是一个2M SPI总线flash(W25X16)测试 \r\n");
SPI_FLASH_Init();
/* Get SPI Flash Device ID */
DeviceID = SPI_FLASH_ReadDeviceID();
Delay( 200 );
/* Get SPI Flash ID */
FlashID = SPI_FLASH_ReadID();
printf("\r\n FlashID is 0x%X, Manufacturer Device ID is 0x%X\r\n", FlashID, DeviceID);
/* Check the SPI Flash ID */
if (FlashID == sFLASH_ID) /* #define sFLASH_ID 0xEF3015 */
{
printf("\r\n 检测到华邦flash W25X16 !\r\n");
/* Erase SPI FLASH Sector to write on */
SPI_FLASH_SectorErase(FLASH_SectorToErase);
/*写缓存并发送*/
SPI_FLASH_BufferWrite(Tx_Buffer, FLASH_WriteAddress, BufferSize);
printf("\r\n写入的数据是:%s \r\t", Tx_Buffer);
/* 读出刚才写入的数据*/
SPI_FLASH_BufferRead(Rx_Buffer, FLASH_ReadAddress, BufferSize);
printf("\r\n读出的数据是:%s \r\n", Rx_Buffer);
TransferStatus1 = Buffercmp(Tx_Buffer, Rx_Buffer, BufferSize);
if( PASSED == TransferStatus1 )
{
printf("\r\n 2M SPI总线flash(W25X16)测试成功!\n\r");
}
else
{
printf("\r\n 2M SPI总线flash(W25X16)测试失败!\n\r");
}
}// if (FlashID == sFLASH_ID)
else
{
printf("\r\n 未检测到 W25X16 ID!\n\r");
}
SPI_Flash_PowerDown();
printf("\r\n=================================================\n\r");
}
int main(void)
{
RCC_Configuration();
USART_int(115200);
ADC_CONFIG();
printf(" config done...\r\n");
Get_ADC();
delay_ms(1000);
while(1){
SPI_TEST();
delay_ms(1000);
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
时钟滴答
#include "stm32f10x.h"
#include "stm32_eval.h"
#include <stdio.h>
volatile int flag;
//板子已将PC12脚接到18B20
#define Set_B20() GPIO_SetBits(GPIOC, GPIO_Pin_12) //关上PC12
#define Reset_B20() GPIO_ResetBits(GPIOC, GPIO_Pin_12) //打开PC12
#define Read_B20() GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12) //读PC12
unsigned char Error_Flag=0;
unsigned char zf=0;
/*延时函数 微秒*/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*延时函数 毫秒*/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
void SysTick_Configuration(void)
{
/*==========此次作业的部分===========*/
if (SysTick_Config(48000)) //SysTick配置。48000/48ms=1ms
/*===================================*/
{
while (1);
}
NVIC_SetPriority(SysTick_IRQn, 0x0); //SysTick中断优先级
}
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
RCC_HSEConfig(RCC_HSE_OFF);
RCC_LSEConfig(RCC_LSE_OFF);
/*==========此次作业的部分===========*/
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6); // PLLMul_X就是X的倍数，即8*6=48HMz
/*===================================*/
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
// SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
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);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = BaudRate;//??????
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//???????8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1
USART_InitStructure.USART_Parity = USART_Parity_No;//????
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????none
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//??????????
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
void delay_18b20(u32 nus) //18B20时序要求严格精确，为18B20写的延时函数
{
u16 i; //这个函数写的貌似是1us
while(nus--) //nus每减一次，i减12次
for(i=12;i>0;i--);
}
void Init18B20(void)
{
u8 aa=0;
u8 count =0;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //打开PC时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //选中管脚12
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; //开漏输出
GPIO_Init(GPIOC, &GPIO_InitStructure);
Set_B20() ; //拉高
delay_18b20(1);
//一、复位：至少480us的低电平信号，当18b20接收到此信号后会回发芯片一个存在脉冲
Reset_B20(); //拉低
delay_18b20(480);
//二、存在脉冲：将数据单总线拉高，接收存在脉冲，通信双方达成基本协议，双方开始数据通信
Set_B20(); //拉高
delay_18b20(480);
count=0;
aa=Read_B20(); //aa为读得的温度、
/*=====我觉得下面这几句用来统计18B20出现错误的次数，次数到99次的时候报错======*/
while(!aa && count<100) //如果温度值和count数都大于100时
{
aa=Read_B20(); //再次读温度值
count++; //发生错误了，数值+1
}
if(count>=99) //如果发生错误的次数大于99次，那么报错，标志位为1
Error_Flag=1;
else
Error_Flag=0; //报错次数未达到99次，正常工作
}
//读一个字节
unsigned char Read18B20(void)//读18b20里的数据，由于是单数据总线，需要一位一位地读
{
unsigned char i=0;
unsigned char date=0;
u8 tempp;
for(i=8;i>0;i--)//循环8次
{
Reset_B20(); //拉低读数
date>>=1; //右移一位
delay_18b20(1);
Set_B20(); //拉高
delay_18b20(1);
tempp=Read_B20(); // tempp为读得的温度
if(tempp)
date|=0x80;
delay_18b20(60);
}
return(date);
}
void Write18B20(unsigned char date) //写一个字节
{
unsigned char i=0;
for (i=8; i>0; i--)
{
Reset_B20();
delay_18b20(1);
if(date & 0x01)
{
Set_B20();
}
else
{ Reset_B20();}
delay_18b20(60);
date>>=1;
Set_B20();
delay_18b20(1);
}
delay_18b20(15);
}
float Read_T()//
{
unsigned char TUp,TDown;
unsigned char fTemp;
u8 TT=0;
float Temp = 0;
Init18B20();
Write18B20(0xcc); // 跳过读取序列号
Write18B20(0x44); //
Init18B20();
Write18B20(0xcc); //
Write18B20(0xbe); //
TDown = Read18B20(); //低8位
TUp = Read18B20(); //高8位
if(TUp>0x7f)
{
TDown=~TDown;
TUp=~TUp+1;
TUp/=8;
zf=1;
}
else
zf=0;
fTemp=TDown&0x0f;
TUp<<=4;
TDown>>=4;
TT=TUp|TDown;
Temp=TT+(float)fTemp/16;
return(Temp);
}
int main(void)
{
int i;
unsigned char ID1[8]; //定义一个用于18b20id读取和存放的数组
RCC_Configuration();
USART_int(115200);
SysTick_Configuration();
/*==========此次作业的部分===========*/
Init18B20 (); //初始化DS18B20
Write18B20(0x33); //写入“读取序列号”命令
delay_18b20 (15);
for(i=0;i<8;i++)
{
ID1[i]=Read18B20(); //读取18b20发回的64位地址
}
/*===================================*/
printf(" config done...\r\n");
delay_ms(1000);
while(1)
{
/*==========此次作业的部分===========*/
if(flag == 300){ //300us读一次id
printf("The id is:");
for(i=0;i<8;i++)
{
printf("%u",ID1[i]);
if(i==7){printf("\r\n"); }
}
}
/*===================================*/
if(flag == 500){ //500us读一次温度
printf("The Temperature is:%f\r\n",Read_T());
}
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
#include "stm32f10x.h"
#include "misc.h"
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void TIM2_Configuration(void);
void TIM3_Configuration(void);
void TIM7_Configuration(void);
int main(void)
{
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
TIM2_Configuration();
TIM3_Configuration();
TIM7_Configuration();
while (1) {
;
}
}
void TIM2_Configuration(void)
{
/*每0.5s发生一次更新事件(进入中断服务程序) */
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 17999;
TIM_TimeBaseStructure.TIM_Prescaler = 1999;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_ARRPreloadConfig(TIM2, DISABLE);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM2, ENABLE);
}
void TIM3_Configuration(void)
{
/*每1s发生一次更新事件(进入中断服务程序)*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 35999;
TIM_TimeBaseStructure.TIM_Prescaler = 1999;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//计数方式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化
TIM_ClearFlag(TIM3, TIM_FLAG_Update);//清除更新标志位
TIM_ARRPreloadConfig(TIM3, DISABLE);//预装载寄存器的内容被立即上传到影子寄存器上
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);//使能中断源
TIM_Cmd(TIM3, ENABLE);//使能
}
void TIM7_Configuration(void)
{
/*每1.5s发生一次更新事件(进入中断服务程序)*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 53999;
TIM_TimeBaseStructure.TIM_Prescaler = 1999;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM7, TIM_FLAG_Update);
TIM_ARRPreloadConfig(TIM7, DISABLE);
TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM7, ENABLE);
}
void RCC_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SystemInit();
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM7, ENABLE);
/* GPIOC clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);//使能PD时钟，使能IO时钟
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);//蜂鸣器
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the TIM2 gloabal Interrupt*/
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the TIM3 gloabal Interrupt*/
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the TIM7 gloabal Interrupt*/
NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
#include "stm32f10x_it.h"
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {
/* Clear TIM2 update interrupt */
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
GPIO_WriteBit(GPIOC, GPIO_Pin_0|GPIO_Pin_1, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_0|GPIO_Pin_1)));
}
}
void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {
/* Clear TIM3 update interrupt */
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
GPIO_WriteBit(GPIOC, GPIO_Pin_2|GPIO_Pin_3, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_2|GPIO_Pin_3)));
}
}
void TIM7_IRQHandler(void)
{
if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET) {
/* Clear TIM7 update interrupt */
TIM_ClearITPendingBit(TIM7, TIM_IT_Update);
GPIO_WriteBit(GPIOC,GPIO_Pin_4|GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_4|GPIO_Pin_7)));
}
}
定时器 tim3定时闪烁led
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