- /****************************************************************************
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V2.0
- * $Revision: 1 $
- * $Date: 14/10/01 5:10p $
- * [url=home.php?mod=space&uid=247401]@brief[/url] NUC230_240 Series CAN Driver Sample Code
- *
- * @note
- * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include <stdio.h>
- #include "NUC230_240.h"
- #define PLL_CLOCK 50000000
- /*---------------------------------------------------------------------------*/
- /* Function Declare */
- /*---------------------------------------------------------------------------*/
- extern char GetChar(void);
- void CAN_ShowMsg(STR_CANMSG_T* Msg);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Define global variables and constants */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Declare a CAN message structure */
- STR_CANMSG_T rrMsg;
- /*---------------------------------------------------------------------------------------------------------*/
- /* ISR to handle CAN interrupt event */
- /*---------------------------------------------------------------------------------------------------------*/
- void CAN_MsgInterrupt(CAN_T *tCAN, uint32_t u32IIDR)
- {
- if(u32IIDR == 1) {
- printf("Msg-0 INT and Callback\n");
- CAN_Receive(tCAN, 0, &rrMsg);
- CAN_ShowMsg(&rrMsg);
- }
- if(u32IIDR == 5 + 1) {
- printf("Msg-5 INT and Callback \n");
- CAN_Receive(tCAN, 5, &rrMsg);
- CAN_ShowMsg(&rrMsg);
- }
- if(u32IIDR == 31 + 1) {
- printf("Msg-31 INT and Callback \n");
- CAN_Receive(tCAN, 31, &rrMsg);
- CAN_ShowMsg(&rrMsg);
- }
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* CAN0 interrupt handler */
- /*---------------------------------------------------------------------------------------------------------*/
- void CAN0_IRQHandler(void)
- {
- uint32_t u8IIDRstatus;
- u8IIDRstatus = CAN0->IIDR;
- if(u8IIDRstatus == 0x00008000) { /* Check Status Interrupt Flag (Error status Int and Status change Int) */
- /**************************/
- /* Status Change interrupt*/
- /**************************/
- if(CAN0->STATUS & CAN_STATUS_RXOK_Msk) {
- CAN0->STATUS &= ~CAN_STATUS_RXOK_Msk; /* Clear RxOK status*/
- printf("RxOK INT\n") ;
- }
- if(CAN0->STATUS & CAN_STATUS_TXOK_Msk) {
- CAN0->STATUS &= ~CAN_STATUS_TXOK_Msk; /* Clear TxOK status*/
- printf("TxOK INT\n") ;
- }
- /**************************/
- /* Error Status interrupt */
- /**************************/
- if(CAN0->STATUS & CAN_STATUS_EWARN_Msk) {
- printf("EWARN INT\n") ;
- }
- if(CAN0->STATUS & CAN_STATUS_BOFF_Msk) {
- printf("BOFF INT\n") ;
- }
- } else if(u8IIDRstatus != 0) {
- printf("=> Interrupt Pointer = %d\n", CAN0->IIDR - 1);
- CAN_MsgInterrupt(CAN0, u8IIDRstatus);
- CAN_CLR_INT_PENDING_BIT(CAN0, ((CAN0->IIDR) - 1)); /* Clear Interrupt Pending */
- } else if(CAN0->WU_STATUS == 1) {
- printf("Wake up\n");
- CAN0->WU_STATUS = 0; /* Write '0' to clear */
- }
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* CAN0 interrupt handler */
- /*---------------------------------------------------------------------------------------------------------*/
- void CAN1_IRQHandler(void)
- {
- uint32_t u8IIDRstatus;
- u8IIDRstatus = CAN1->IIDR;
- if(u8IIDRstatus == 0x00008000) { /* Check Status Interrupt Flag (Error status Int and Status change Int) */
- /**************************/
- /* Status Change interrupt*/
- /**************************/
- if(CAN1->STATUS & CAN_STATUS_RXOK_Msk) {
- CAN1->STATUS &= ~CAN_STATUS_RXOK_Msk; /* Clear RxOK status*/
- printf("RxOK INT\n") ;
- }
- if(CAN1->STATUS & CAN_STATUS_TXOK_Msk) {
- CAN1->STATUS &= ~CAN_STATUS_TXOK_Msk; /* Clear TxOK status*/
- printf("TxOK INT\n") ;
- }
- /**************************/
- /* Error Status interrupt */
- /**************************/
- if(CAN1->STATUS & CAN_STATUS_EWARN_Msk) {
- printf("EWARN INT\n") ;
- }
- if(CAN1->STATUS & CAN_STATUS_BOFF_Msk) {
- printf("BOFF INT\n") ;
- }
- } else if(u8IIDRstatus != 0) {
- printf("=> Interrupt Pointer = %d\n", CAN1->IIDR - 1);
- CAN_MsgInterrupt(CAN1, u8IIDRstatus);
- CAN_CLR_INT_PENDING_BIT(CAN1, ((CAN1->IIDR) - 1)); /* Clear Interrupt Pending */
- } else if(CAN1->WU_STATUS == 1) {
- printf("Wake up\n");
- CAN1->WU_STATUS = 0; /* Write '0' to clear */
- }
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset message interface parameters */
- /*---------------------------------------------------------------------------------------------------------*/
- void CAN_ResetIF(CAN_T *tCAN, uint8_t u8IF_Num)
- {
- if(u8IF_Num > 1)
- return;
- tCAN->IF[u8IF_Num].CREQ = 0x0; // set bit15 for sending
- tCAN->IF[u8IF_Num].CMASK = 0x0;
- tCAN->IF[u8IF_Num].MASK1 = 0x0; // useless in basic mode
- tCAN->IF[u8IF_Num].MASK2 = 0x0; // useless in basic mode
- tCAN->IF[u8IF_Num].ARB1 = 0x0; // ID15~0
- tCAN->IF[u8IF_Num].ARB2 = 0x0; // MsgVal, eXt, xmt, ID28~16
- tCAN->IF[u8IF_Num].MCON = 0x0; // DLC
- tCAN->IF[u8IF_Num].DAT_A1 = 0x0; // data0,1
- tCAN->IF[u8IF_Num].DAT_A2 = 0x0; // data2,3
- tCAN->IF[u8IF_Num].DAT_B1 = 0x0; // data4,5
- tCAN->IF[u8IF_Num].DAT_B2 = 0x0; // data6,7
- }
- /*---------------------------------------------------------------------------*/
- /* Show Message Function */
- /*---------------------------------------------------------------------------*/
- void CAN_ShowMsg(STR_CANMSG_T* Msg)
- {
- uint8_t i;
- /* Show the message information */
- printf("Read ID=0x%X, Type=%s, DLC=%d, Data=", Msg->Id, Msg->IdType ? "EXT" : "STD", Msg->DLC);
- for(i = 0; i < Msg->DLC; i++)
- printf("%X,", Msg->Data[i]);
- printf("\n\n");
- }
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Enable Internal RC 22.1184MHz clock */
- CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);
- /* Waiting for Internal RC clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);
- /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
- CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
- /* Enable external XTAL 12MHz clock */
- CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);
- /* Waiting for external XTAL clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);
- /* Set core clock as PLL_CLOCK from PLL */
- CLK_SetCoreClock(PLL_CLOCK);
- /* Enable UART module clock */
- CLK_EnableModuleClock(UART0_MODULE);
- /* Enable CAN module clock */
- CLK_EnableModuleClock(CAN0_MODULE);
- //CLK_EnableModuleClock(CAN1_MODULE);
- /* Select UART module clock source */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_PLL, CLK_CLKDIV_UART(1));
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set GPB multi-function pins for UART0 RXD and TXD */
- SYS->GPB_MFP &= ~(SYS_GPB_MFP_PB0_Msk | SYS_GPB_MFP_PB1_Msk);
- SYS->GPB_MFP |= SYS_GPB_MFP_PB0_UART0_RXD | SYS_GPB_MFP_PB1_UART0_TXD;
- /* Set PD multi-function pins for CANTX0, CANRX0 */
- SYS->GPD_MFP &= ~(SYS_GPD_MFP_PD6_Msk | SYS_GPD_MFP_PD7_Msk);
- SYS->GPD_MFP = SYS_GPD_MFP_PD6_CAN0_RXD | SYS_GPD_MFP_PD7_CAN0_TXD;
- /* Set PA multi-function pins for CANTX1, CANRX1 */
- // SYS->GPA_MFP &= ~(SYS_GPA_MFP_PA10_Msk | SYS_GPA_MFP_PA11_Msk);
- // SYS->GPA_MFP = SYS_GPA_MFP_PA10_CAN1_TXD | SYS_GPA_MFP_PA11_CAN1_RXD;
- // SYS->ALT_MFP &= ~(SYS_ALT_MFP_PA10_Msk | SYS_ALT_MFP_PA11_Msk);
- // SYS->ALT_MFP |= SYS_ALT_MFP_PA10_CAN1_TXD | SYS_ALT_MFP_PA11_CAN1_RXD;
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- void UART0_Init()
- {
- /* Reset IP */
- SYS_ResetModule(UART0_RST);
- /* Configure UART0 and set UART0 Baudrate */
- UART_Open(UART0, 115200);
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* Disable CAN Clock and Reset it */
- /*---------------------------------------------------------------------------------------------------------*/
- void CAN_STOP(void)
- {
- /* Disable CAN0 Clock and Reset it */
- SYS_ResetModule(CAN0_RST);
- CLK_DisableModuleClock(CAN0_MODULE);
- /* Disable CAN1 Clock and Reset it */
- SYS_ResetModule(CAN1_RST);
- CLK_DisableModuleClock(CAN1_MODULE);
- }
- /*----------------------------------------------------------------------------*/
- /* Some description about how to create test environment */
- /*----------------------------------------------------------------------------*/
- void Note_Configure()
- {
- printf("\n\n");
- printf("+--------------------------------------------------------------------------+\n");
- printf("| About CAN sample code configure |\n");
- printf("+--------------------------------------------------------------------------+\n");
- printf("| The sample code provide a simple sample code for you study CAN |\n");
- printf("| Before execute it, please check description as below |\n");
- printf("| |\n");
- printf("| 1.CAN_TX and CAN_RX should be connected to your CAN transceiver |\n");
- printf("| 2.Using two module board and connect to the same CAN BUS |\n");
- printf("| 3.Check the terminal resistor of bus is connected |\n");
- printf("| 4.Using UART0 as print message port |\n");
- printf("| |\n");
- printf("| |--------| |-----------| CANBUS |-----------| |--------| |\n");
- printf("| | |------>| |<--------->| |<------| | |\n");
- printf("| | |CAN_TX | CAN | CAN_H | CAN |CAN_TX | | |\n");
- printf("| | NUC2XX | |Transceiver| |Transceiver| | NUC2XX | |\n");
- printf("| | |<------| |<--------->| |------>| | |\n");
- printf("| | |CAN_RX | | CAN_L | |CAN_RX | | |\n");
- printf("| |--------| |-----------| |-----------| |--------| |\n");
- printf("| | | |\n");
- printf("| | | |\n");
- printf("| V V |\n");
- printf("| UART0 UART0 |\n");
- printf("|(print message) (print message) |\n");
- printf("+--------------------------------------------------------------------------+\n");
- }
- /*----------------------------------------------------------------------------*/
- /* Set the CAN speed */
- /*----------------------------------------------------------------------------*/
- void SelectCANSpeed(CAN_T *tCAN)
- {
- uint32_t unItem;
- int32_t i32Err = 0;
- printf("Please select CAN speed you desired\n");
- printf("[0] 1000Kbps\n");
- printf("[1] 500Kbps\n");
- printf("[2] 250Kbps\n");
- printf("[3] 125Kbps\n");
- printf("[4] 100Kbps\n");
- printf("[5] 50Kbps\n");
- unItem = GetChar();
- printf("%c\n", unItem);
- if(unItem == '1')
- i32Err = CAN_Open(tCAN, 500000, CAN_NORMAL_MODE);//Set target baud-rate and operation mode.
- else if(unItem == '2')
- i32Err = CAN_Open(tCAN, 250000, CAN_NORMAL_MODE);
- else if(unItem == '3')
- i32Err = CAN_Open(tCAN, 125000, CAN_NORMAL_MODE);
- else if(unItem == '4')
- i32Err = CAN_Open(tCAN, 100000, CAN_NORMAL_MODE);
- else if(unItem == '5')
- i32Err = CAN_Open(tCAN, 50000, CAN_NORMAL_MODE);
- else
- i32Err = CAN_Open(tCAN, 1000000, CAN_NORMAL_MODE);
- if(i32Err < 0)
- printf("Set CAN bit rate is fail\n");
- else
- printf("Real baud-rate value(bps): %d\n", i32Err);
- }
- /*----------------------------------------------------------------------------*/
- /* Test Menu */
- /*----------------------------------------------------------------------------*/
- void TestItem(void)
- {
- printf("\n");
- printf("+------------------------------------------------------------------ +\n");
- printf("| Nuvoton CAN BUS DRIVER DEMO |\n");
- printf("+-------------------------------------------------------------------+\n");
- printf("| |\n");
- printf("| Receive a message by normal mode |\n");
- printf("| |\n");
- printf("+-------------------------------------------------------------------+\n");
- }
- /*----------------------------------------------------------------------------*/
- /* Send Rx Msg by Normal Mode Function (With Message RAM) */
- /*----------------------------------------------------------------------------*/
- void Test_NormalMode_Rx(CAN_T *tCAN)
- {
- if(CAN_SetRxMsg(tCAN, MSG(0), CAN_STD_ID, 0x7FF) == FALSE) {
- printf("Set Rx Msg Object failed\n");
- return;
- }
- if(CAN_SetRxMsg(tCAN, MSG(5), CAN_EXT_ID, 0x12345) == FALSE) {
- printf("Set Rx Msg Object failed\n");
- return;
- }
- if(CAN_SetRxMsg(tCAN, MSG(31), CAN_EXT_ID, 0x7FF01) == FALSE) {
- printf("Set Rx Msg Object failed\n");
- return;
- }
- /*Choose one mode to test*/
- #if 1
- /* Polling Mode */
- while(1) {
- while(tCAN->IIDR == 0); /* Wait IDR is changed */
- printf("IDR = %x\n", tCAN->IIDR);
- CAN_Receive(tCAN, tCAN->IIDR - 1, &rrMsg); /* Get the message */
- CAN_ShowMsg(&rrMsg); /* Show the message object */
- }
- #else
- /* INT Mode */
- CAN_EnableInt(tCAN, CAN_CON_IE_Msk); /* Enable CAN interrupt and corresponding NVIC of CAN */
- NVIC_SetPriority(CAN0_IRQn, (1 << __NVIC_PRIO_BITS) - 2); /* Install CAN call back functions */
- NVIC_SetPriority(CAN1_IRQn, (1 << __NVIC_PRIO_BITS) - 2);
- NVIC_EnableIRQ(CAN0_IRQn);
- NVIC_EnableIRQ(CAN1_IRQn);
- printf("Wait Msg\n");
- printf("Enter any key to exit\n");
- GetChar();
- #endif
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* MAIN function */
- /*---------------------------------------------------------------------------------------------------------*/
- int main(void)
- {
- CAN_T *tCAN;
- tCAN = (CAN_T *) CAN0;
- //tCAN = (CAN_T *) CAN1;
- /* Unlock protected registers */
- SYS_UnlockReg();
- /* Init System, IP clock and multi-function I/O */
- SYS_Init();
- /* Lock protected registers */
- SYS_LockReg();
- /* Init UART0 for printf */
- UART0_Init();
- /*---------------------------------------------------------------------------------------------------------*/
- /* SAMPLE CODE */
- /*---------------------------------------------------------------------------------------------------------*/
- // /* Set GPB12 to control CAN transceiver for Nuvoton board */
- // PB12 = 0;
- /* Some description about how to create test environment */
- Note_Configure();
- /* Configuring the Bit Timing */
- SelectCANSpeed(tCAN);
- /* Test Menu */
- TestItem();
- printf("Receive a message by normal mode\n\n");
- /* Send Rx Msg by Normal Mode Function (With Message RAM) */
- Test_NormalMode_Rx(tCAN);
- /* Disable CAN */
- CAN_Close(tCAN);
- /* Disable CAN Clock and Reset it */
- CAN_STOP();
- while(1);
- }
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