发布时间 : 星期六 文章基于STM32的CAN总线的数据采集卡设计更新完毕开始阅读
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附录2
程序原代码：
#include \
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus; vu32 ret; /* for return of the interrupt handling */ volatile TestStatus TestRx; ErrorStatus HSEStartUpStatus;
TestStatus CAN_Polling(void); TestStatus CAN_Interrupt(void);
void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; // LED
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure CAN pin: RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure CAN pin: TX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinRemapConfig(GPIO_Remap1_CAN1, ENABLE ); //IO脚到 PB8，PB9
}
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重影射CAN
//系统中断管理
void NVIC_Configuration(void) { }
//配置系统时钟,使能各外设时钟 void RCC_Configuration(void) { }
//配置所有外设
SystemInit();
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); /* enabling interrupt */
NVIC_InitStructure.NVIC_IRQChannel=USB_LP_CAN1_RX0_IRQn;; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); #ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); #else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endif
/* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitTypeDef NVIC_InitStructure;
|RCC_APB2Periph_GPIOB , ENABLE );
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void Init_All_Periph(void) { }
int main(void) {
if (TestRx == FAILED) {
GPIO_SetBits(GPIOD, GPIO_Pin_11); } else {
GPIO_ResetBits(GPIOA, GPIO_Pin_1); } */
/* CAN transmit at 500Kb/s and receive by interrupt in loopback mode*/
TestRx = CAN_Interrupt();
/*
if (TestRx == FAILED) {
GPIO_ResetBits(GPIOA, GPIO_Pin_10); } else {
GPIO_ResetBits(GPIOA, GPIO_Pin_1); }
/* CAN transmit at 100Kb/s and receive by polling in loopback mode*/ TestRx = CAN_Polling(); Init_All_Periph(); RCC_Configuration(); GPIO_Configuration(); NVIC_Configuration();
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