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/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
RCC_Configuration(); // System Clocks Configuration
NVIC_Configuration(); // NVIC Configuration
GPIO_Configuration(); // GPIO ports pins Configuration
TestRx = CAN_Polling(); // CAN transmit at 100Kb/s and receive by polling in loopback mode
if (TestRx == FAILED) {
GPIO_SetBits(GPIOC, GPIO_Pin_4); // Turn on led connected to PC.08 pin (LD3)
}
else {
GPIO_SetBits(GPIOC, GPIO_Pin_6); // Turn on led connected to PC.06 pin (LD1)
}
while (1) { }
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
RCC_DeInit(); /* RCC system reset(for debug purpose) */
RCC_HSEConfig(RCC_HSE_ON); /* Enable HSE */
HSEStartUpStatus = RCC_WaitForHSEStartUp(); /* Wait till HSE is ready */
if(HSEStartUpStatus == SUCCESS) {
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); /* Enable Prefetch Buffer */
RCC_HCLKConfig(RCC_SYSCLK_Div1); /* HCLK = SYSCLK */
RCC_PCLK2Config(RCC_HCLK_Div1); /* PCLK2 = HCLK */
RCC_PCLK1Config(RCC_HCLK_Div2); /* PCLK1 = HCLK/2 */
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE); /* Select HSE as system clock source */
while(RCC_GetSYSCLKSource() != 0x04) { // Wait till HSE is used as system clock source
}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); /* GPIOA and GPIOC clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN, ENABLE); /* CAN Periph clock enable */
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configures the different GPIO ports.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure); /* Configure PC.06, PC.07, PC.08 and PC.09 as Output push-pull */
/* Enable the USART2 Pins Software Remapping */
GPIO_PinRemapConfig(GPIO_Remap2_CAN, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOD, &GPIO_InitStructure); /* Configure CAN pin: RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure); /* Configure CAN pin: TX */
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures the NVIC and Vector Table base address.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); /* Set the Vector Table base location at 0x20000000 */
#else /* VECT_TAB_FLASH */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); /* Set the Vector Table base location at 0x08000000 */
#endif
/* enabling interrupt */
NVIC_InitStructure.NVIC_IRQChannel=USB_LP_CAN_RX0_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*******************************************************************************
* Function Name : CAN_Polling
* Description : Configures the CAN and transmit and receive by polling
* Input : None
* Output : None
* Return : PASSED if the reception is well done, FAILED in other case
*******************************************************************************/
TestStatus CAN_Polling(void)
{
u8 Error;
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
CanTxMsg TxMessage;
u32 i = 0;
u8 TransmitMailbox;
/* CAN register init */
CAN_DeInit();
CAN_StructInit(&CAN_InitStructure);
/* CAN cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal; // CAN_Mode_LoopBack
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_8tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_7tq;
CAN_InitStructure.CAN_Prescaler = 5;
Error = CAN_Init(&CAN_InitStructure);
if (Error == 0)
return FAILED;
/* CAN filter init */
CAN_FilterInitStructure.CAN_FilterNumber = 0;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0; //0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
/* transmit */
TxMessage.StdId = 0x18;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = 8;
TxMessage.Data[0] = 0x40;
TxMessage.Data[1] = 0x40;
TxMessage.Data[2] = 0x45;
TxMessage.Data[3] = 0x51;
TxMessage.Data[4] = 0x52;
TxMessage.Data[5] = 0x65;
TxMessage.Data[6] = 0x61;
TxMessage.Data[7] = 0x64; // @@EQRead
TransmitMailbox = CAN_Transmit(&TxMessage);
i = 0;
while((CAN_TransmitStatus(TransmitMailbox) != CANTXOK) && (i != 0xFF)) {
i++;
}
return PASSED; // Test Passed
}
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