ecan.rar_DSP28335 CAN_DSP28335 eCAN_dsp28335 can_ecan_使用DSP2833

// TI File $Revision: /main/8 $ // Checkin $Date: August 10, 2007 09:04:27 $ //########################################################################### // // FILE: Example_2833xECanBack2Back.c // // TITLE: DSP2833x eCAN Back-to-back transmission and reception in // SELF-TEST mode // // ASSUMPTIONS: // // This program requires the DSP2833x header files. // // This progrm uses the peripheral's self test mode. // Other then boot mode configuration, no other hardware configuration // is required. // // As supplied, this project is configured for "boot to SARAM" // operation. The 2833x Boot Mode table is shown below. // For information on configuring the boot mode of an eZdsp, // please refer to the documentation included with the eZdsp, // // $Boot_Table: // // GPIO87 GPIO86 GPIO85 GPIO84 // XA15 XA14 XA13 XA12 // PU PU PU PU // ========================================== // 1 1 1 1 Jump to Flash // 1 1 1 0 SCI-A boot // 1 1 0 1 SPI-A boot // 1 1 0 0 I2C-A boot // 1 0 1 1 eCAN-A boot // 1 0 1 0 McBSP-A boot // 1 0 0 1 Jump to XINTF x16 // 1 0 0 0 Jump to XINTF x32 // 0 1 1 1 Jump to OTP // 0 1 1 0 Parallel GPIO I/O boot // 0 1 0 1 Parallel XINTF boot // 0 1 0 0 Jump to SARAM <- "boot to SARAM" // 0 0 1 1 Branch to check boot mode // 0 0 1 0 Boot to flash, bypass ADC cal // 0 0 0 1 Boot to SARAM, bypass ADC cal // 0 0 0 0 Boot to SCI-A, bypass ADC cal // Boot_Table_End$ // // DESCRIPTION: // // This test transmits data back-to-back at high speed without // stopping. // The received data is verified. Any error is flagged. // MBX0 transmits to MBX16, MBX1 transmits to MBX17 and so on.... // This program illustrates the use of self-test mode // //########################################################################### // Original Author H.J. // // $TI Release: DSP2833x Header Files V1.01 $ // $Release Date: September 26, 2007 $ //########################################################################### #include "DSP2833x_Device.h" // DSP2833x Headerfile Include File #include "DSP2833x_Examples.h" // DSP2833x Examples Include File // Prototype statements for functions found within this file. void mailbox_check(int32 T1, int32 T2, int32 T3); void mailbox_read(int16 i); // Global variable for this example Uint32 ErrorCount; Uint32 PassCount; Uint32 MessageReceivedCount; Uint32 TestMbox1 = 0; Uint32 TestMbox2 = 0; Uint32 TestMbox3 = 0; void main(void) { Uint16 j; // eCAN control registers require read/write access using 32-bits. Thus we // will create a set of shadow registers for this example. These shadow // registers will be used to make sure the access is 32-bits and not 16. struct ECAN_REGS ECanbShadow; // Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl(); // Step 2. Initalize GPIO: // This example function is found in the DSP2833x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio(); // Skipped for this example // For this example, configure CAN pins using GPIO regs here // This function is found in DSP2833x_ECan.c InitECanGpio(); // Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interrupts DINT; // Initialize PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl(); // Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000; // Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example. This is useful for debug purposes. // The shell ISR routines are found in DSP2833x_DefaultIsr.c. // This function is found in DSP2833x_PieVect.c. InitPieVectTable(); // Step 4. Initialize all the Device Peripherals: // This function is found in DSP2833x_InitPeripherals.c // InitPeripherals(); // Not required for this example // Step 5. User specific code, enable interrupts: MessageReceivedCount = 0; ErrorCount = 0; PassCount = 0; // eCAN control registers require 32-bit access. // If you want to write to a single bit, the compiler may break this // access into a 16-bit access. One solution, that is presented here, // is to use a shadow register to force the 32-bit access. // Read the entire register into a shadow register. This access // will be 32-bits. Change the desired bit and copy the value back // to the eCAN register with a 32-bit write. // Configure the eCAN RX and TX pins for eCAN transmissions EALLOW; ECanbShadow.CANTIOC.all = ECanbRegs.CANTIOC.all; ECanbShadow.CANTIOC.bit.TXFUNC = 1; ECanbRegs.CANTIOC.all = ECanbShadow.CANTIOC.all; ECanbShadow.CANRIOC.all = ECanbRegs.CANRIOC.all; ECanbShadow.CANRIOC.bit.RXFUNC = 1; ECanbRegs.CANRIOC.all = ECanbShadow.CANRIOC.all; EDIS; // Disable all Mailboxes // Since this write is to the entire register (instead of a bit // field) a shadow register is not required. ECanbRegs.CANME.all = 0; // Mailboxs can be written to 16-bits or 32-bits at a time // Write to the MSGID field of TRANSMIT mailboxes MBOX0 - 15 ECanbMboxes.MBOX0.MSGID.all = 0x9555AAA0; ECanbMboxes.MBOX1.MSGID.all = 0x9555AAA1; ECanbMboxes.MBOX2.MSGID.all = 0x9555AAA2; ECanbMboxes.MBOX3.MSGID.all = 0x9555AAA3; ECanbMboxes.MBOX4.MSGID.all = 0x9555AAA4; ECanbMboxes.MBOX5.MSGID.all = 0x9555AAA5; ECanbMboxes.MBOX6.MSGID.all = 0x9555AAA6; ECanbMboxes.MBOX7.MSGID.all = 0x9555AAA7; ECanbMboxes.MBOX8.MSGID.all = 0x9555AAA8; ECanbMboxes.MBOX9.MSGID.all = 0x9555AAA9; ECanbMboxes.MBOX10.MSGID.all = 0x9555AAAA; ECanbMboxes.MBOX11.MSGID.all = 0x9555AAAB; ECanbMboxes.MBOX12.MSGID.all = 0x9555AAAC; ECanbMboxes.MBOX13.MSGID.all = 0x9555AAAD; ECanbMboxes.MBOX14.MSGID.all = 0x9555AAAE; ECanbMboxes.MBOX15.MSGID.all = 0x9555AAAF; // Write to the MSGID field of RECEIVE mailboxes MBOX16 - 31 ECanbMboxes.MBOX16.MSGID.all = 0x9555AAA0; ECanbMboxes.MBOX17.MSGID.all = 0x9555AAA1; ECanbMboxes.MBOX18.MSGID.all = 0x9555AAA2; ECanbMboxes.MBOX19.MSGID.all = 0x9555AAA3; ECanbMboxes.MBOX20.MSGID.all = 0x9555AAA4; ECanbMboxes.MBOX21.MSGID.all = 0x9555AAA5; ECanbMboxes.MBOX22.MSGID.all = 0x9555AAA6; ECanbMboxes.MBOX23.MSGID.all = 0x9555AAA7; ECanbMboxes.MBOX24.MSGID.all = 0x9555AAA8; ECanbMboxes.MBOX25.MSGID.all = 0x9555AAA9; ECanbMboxes.MBOX26.MSGID.all = 0x9555AAAA; ECanbMboxes.MBOX27.MSGID.all = 0x9555AAAB; ECanbMboxes.MBOX28.MSGID.all = 0x9555AAAC; ECanbMboxes.MBOX29.MSGID.all = 0x9555AAAD; ECanbMboxes.MBOX30.MSGID.all = 0x9555AAAE; ECanbMboxes.MBOX31.MSGID.all = 0x9555AAAF; // Configur