/*
** Configures the SPI1 instance for communication.
*/
static void SPISetUp(void)
{
unsigned char dcs = 0x01;
unsigned int val = SIMO_SOMI_CLK_CS;
/* Resets the SPI */
SPIReset(SOC_SPI_1_REGS);
/* Brings SPI Out-of-Reset */
SPIOutOfReset(SOC_SPI_1_REGS);
/* Configures SPI in Master Mode */
SPIModeConfigure(SOC_SPI_1_REGS, SPI_MASTER_MODE);
/* Sets SPI Controller for 4-pin Mode with Chip Select */
SPIPinControl(SOC_SPI_1_REGS, 0, 0, &val);
/* Configures the Prescale bit in Data Format register. */
SPIClkConfigure(SOC_SPI_1_REGS, 150000000, 10000000,
SPI_DATA_FORMAT0);
/* Chip Select Default Pattern is Set To 1 in SPIDEF Register*/
SPIDefaultCSSet(SOC_SPI_1_REGS, dcs);
/* Configures SPI Data Format Register */
SPIConfigDataFmtReg(SPI_DATA_FORMAT0);
}
/*!
\brief closes an opened spi communication port
\param fd - file descriptor of an opened SPI channel
\return upon successful completion, the function shall return 0.
Otherwise, -1 shall be returned
\sa spi_Open
\note
\warning
*/
int spi_Close(Fd_t fd)
{
unsigned long ulBase = LSPI_BASE;
g_SpiFd = 0;
if(g_ucDMAEnabled)
{
//Simplelink_UDMADeInit();
#ifdef SL_PLATFORM_MULTI_THREADED
osi_InterruptDeRegister(INT_LSPI);
osi_MsgQDelete(&DMAMsgQ);
#else
SPIIntUnregister(ulBase);
g_cDummy = 0;
#endif
SPIFIFODisable(ulBase,SPI_RX_FIFO);
SPIFIFODisable(ulBase,SPI_TX_FIFO);
SPIDmaDisable(ulBase,SPI_RX_DMA);
SPIDmaDisable(ulBase,SPI_TX_DMA);
}
//Disable Chip Select
SPICSDisable(LSPI_BASE);
//Disable SPI Channel
SPIDisable(ulBase);
// Reset SPI
SPIReset(ulBase);
// Enable SPI Peripheral
PRCMPeripheralClkDisable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
return 0;
}
int main() {
DDRB = (1 << PB4);
DDRD |= (1 << PD2)|(1 << PD3);
sei();
initUSART();
initSPI();
initADC();
while(1){
if(PINB & (1 << PB2)) {
SPIReset();
}
}
}
/******************************************************************************
* Function: void CANInit//(void)
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: This function initializes the MCP2515.
*
*
* Note: None
*****************************************************************************/
void CANInit() {
unsigned char n, EEPROM_ver;
SPIReset(); //Wait state is in SPIReset() function
EEPROM_ver = EEPROMCRCCheck(0, 128);
//EEPROM_ver=0;
for (n = 0; n < 250; n++); //Wait anyway
//Set Config Mode and verify
//CANCTRL Register
if (EEPROM_ver) {
CANCTRL_byte = EEPROMBYTERead(CANCTRL);
}
/*
else
{
EEPROMBYTEWrite(CANCTRL,CANCTRL_byte);
}
*/
SET_CONFIG; //Set Configuration mode
CLEAR_OSM; //Not One-Shot-Mode
CLEAR_ABORT; //Clear ABAT bit
CLKOUT_ENABLED; //Enabled CLKOUT pin (will configure as SOF pin in CNF3)
if (!EEPROM_ver) {
EEPROMBYTEWrite(CANCTRL, CANCTRL_byte);
}
SPIByteWrite(CANCTRL, CANCTRL_byte); //Write to CANCTRL
//Verify Mode change
if ((SPIByteRead(CANSTAT)& 0xE0) != OPMODE_CONFIG)
SPIByteWrite(CANCTRL, CANCTRL_byte); //Try again
if (isUsbPowered) //Only if connected to USB. Traffic gen board doesn't process RX msgs
{
//Configure INTERRUPTS
if (EEPROM_ver) {
CANINTE_byte = EEPROMBYTERead(CANINTE);
}
/*
else
{
EEPROMBYTEWrite(CANINTE,CANINTE_byte);
}
*/
G_RXB_INT_ENABLED;
G_TXB_INT_ENABLED;
if (!EEPROM_ver) {
EEPROMBYTEWrite(CANINTE, CANINTE_byte);
}
SPIByteWrite(CANINTE, CANINTE_byte);
}
//Use RXnBF pins as interrupts on RX //(BFPCTRL register)
RXB0BF_PIN_INT;
RXB1BF_PIN_INT;
SPIByteWrite(BFPCTRL, BFPCTRL_byte);
//Configure TXnRTS pins as RTS pins
TXRTSCTRL_byte = 0x07;
SPIByteWrite(TXRTSCTRL, TXRTSCTRL_byte);
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXB0CTRL);
SPIByteWrite(RXB0CTRL, DataArray[0]);
DataArray[0] = EEPROMBYTERead(RXB1CTRL);
SPIByteWrite(RXB1CTRL, DataArray[0]);
} else {
DataArray[0] = 0;
SPIByteWrite(RXB0CTRL, DataArray[0]);
SPIByteWrite(RXB1CTRL, DataArray[0]);
EEPROMBYTEWrite(RXB0CTRL, DataArray[0]);
EEPROMBYTEWrite(RXB1CTRL, DataArray[0]);
}
//Configure MASKS
DataArray[0] = 0x00;
DataArray[1] = 0x00;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXM0SIDH);
DataArray[1] = EEPROMBYTERead(RXM0SIDL);
DataArray[2] = EEPROMBYTERead(RXM0EID8);
DataArray[3] = EEPROMBYTERead(RXM0EID0);
} else {
EEPROMDataWrite(RXM0SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXM0SIDH, 4, DataArray); //RX Mask 0
DataArray[0] = 0x00;
DataArray[1] = 0x00;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXM1SIDH);
DataArray[1] = EEPROMBYTERead(RXM1SIDL);
DataArray[2] = EEPROMBYTERead(RXM1EID8);
DataArray[3] = EEPROMBYTERead(RXM1EID0);
} else {
EEPROMDataWrite(RXM1SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXM1SIDH, 4, DataArray); //RX Mask 1
//SPISeqWrite(RXB0CTRL, 1, 0); //RXB0 Control JM
//SPISeqWrite(RXB1CTRL, 1, 0); //RXB1 Control JM
//Configure FILTERS
//Will RX standard messages into RXB0 and extended into RXB1
DataArray[0] = 0x00;
DataArray[1] = 0x00;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF0SIDH);
DataArray[1] = EEPROMBYTERead(RXF0SIDL);
DataArray[2] = EEPROMBYTERead(RXF0EID8);
DataArray[3] = EEPROMBYTERead(RXF0EID0);
} else {
EEPROMDataWrite(RXF0SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF0SIDH, 4, DataArray);
//SPIByteWrite(RXF0SIDL, 0x00); //Clearing EXIDE... the rest is "don't care"
DataArray[0] = 0x00;
DataArray[1] = 0x00;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF1SIDH);
DataArray[1] = EEPROMBYTERead(RXF1SIDL);
DataArray[2] = EEPROMBYTERead(RXF1EID8);
DataArray[3] = EEPROMBYTERead(RXF1EID0);
} else {
EEPROMDataWrite(RXF1SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF1SIDH, 4, DataArray);
//SPIByteWrite(RXF1SIDL, 0x00); //Clearing EXIDE... the rest is "don't care" //JM
DataArray[0] = 0x00;
DataArray[1] = 0x08;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF2SIDH);
DataArray[1] = EEPROMBYTERead(RXF2SIDL);
DataArray[2] = EEPROMBYTERead(RXF2EID8);
DataArray[3] = EEPROMBYTERead(RXF2EID0);
} else {
EEPROMDataWrite(RXF2SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF2SIDH, 4, DataArray);
//SPIByteWrite(RXF2SIDL, 0x08); //Setting EXIDE... the rest is "don't care"
DataArray[0] = 0x00;
DataArray[1] = 0x08;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF3SIDH);
DataArray[1] = EEPROMBYTERead(RXF3SIDL);
DataArray[2] = EEPROMBYTERead(RXF3EID8);
DataArray[3] = EEPROMBYTERead(RXF3EID0);
} else {
EEPROMDataWrite(RXF3SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF3SIDH, 4, DataArray);
//SPIByteWrite(RXF3SIDL, 0x08); //Setting EXIDE... the rest is "don't care" //JM
DataArray[0] = 0x00;
DataArray[1] = 0x08;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF4SIDH);
DataArray[1] = EEPROMBYTERead(RXF4SIDL);
DataArray[2] = EEPROMBYTERead(RXF4EID8);
DataArray[3] = EEPROMBYTERead(RXF4EID0);
} else {
EEPROMDataWrite(RXF4SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF4SIDH, 4, DataArray);
//SPIByteWrite(RXF4SIDL, 0x08); //Setting EXIDE... the rest is "don't care" //JM
DataArray[0] = 0x00;
DataArray[1] = 0x08;
DataArray[2] = 0x00;
DataArray[3] = 0x00;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(RXF5SIDH);
DataArray[1] = EEPROMBYTERead(RXF5SIDL);
DataArray[2] = EEPROMBYTERead(RXF5EID8);
DataArray[3] = EEPROMBYTERead(RXF5EID0);
} else {
EEPROMDataWrite(RXF5SIDH, &DataArray[0], 4);
}
SPISeqWrite(RXF5SIDH, 4, DataArray);
//SPIByteWrite(RXF5SIDL, 0x08); //Setting EXIDE... the rest is "don't care" //JM
//Configure TX BUFFER 0
DataArray[0] = 0xA3;
DataArray[1] = 0x09;
DataArray[2] = 0x12;
DataArray[3] = 0x34;
DataArray[4] = 0x04;
DataArray[5] = 0x00;
DataArray[6] = 0x01;
DataArray[7] = 0x02;
DataArray[8] = 0x03;
DataArray[9] = 0x04;
DataArray[10] = 0x05;
DataArray[11] = 0x06;
DataArray[12] = 0x07;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(TXB0SIDH);
DataArray[1] = EEPROMBYTERead(TXB0SIDL);
DataArray[2] = EEPROMBYTERead(TXB0EID8);
DataArray[3] = EEPROMBYTERead(TXB0EID0);
DataArray[4] = EEPROMBYTERead(TXB0DLC);
DataArray[5] = EEPROMBYTERead(TXB0D0);
DataArray[6] = EEPROMBYTERead(TXB0D1);
DataArray[7] = EEPROMBYTERead(TXB0D2);
DataArray[8] = EEPROMBYTERead(TXB0D3);
DataArray[9] = EEPROMBYTERead(TXB0D4);
DataArray[10] = EEPROMBYTERead(TXB0D5);
DataArray[11] = EEPROMBYTERead(TXB0D6);
DataArray[12] = EEPROMBYTERead(TXB0D7);
} else {
EEPROMDataWrite(TXB0SIDH, &DataArray, 13);
}
SPILoadTX(CAN_LD_TXB0_ID, 13, DataArray);
//Configure TX BUFFER 1
DataArray[0] = 0x22;
DataArray[1] = 0x00;
DataArray[2] = 0x64;
DataArray[3] = 0x68;
DataArray[4] = 0x02;
DataArray[5] = 0x00;
DataArray[6] = 0x11;
DataArray[7] = 0x22;
DataArray[8] = 0x33;
DataArray[9] = 0x44;
DataArray[10] = 0x55;
DataArray[11] = 0x66;
DataArray[12] = 0x77;
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(TXB1SIDH);
DataArray[1] = EEPROMBYTERead(TXB1SIDL);
DataArray[2] = EEPROMBYTERead(TXB1EID8);
DataArray[3] = EEPROMBYTERead(TXB1EID0);
DataArray[4] = EEPROMBYTERead(TXB1DLC);
DataArray[5] = EEPROMBYTERead(TXB1D0);
DataArray[6] = EEPROMBYTERead(TXB1D1);
DataArray[7] = EEPROMBYTERead(TXB1D2);
DataArray[8] = EEPROMBYTERead(TXB1D3);
DataArray[9] = EEPROMBYTERead(TXB1D4);
DataArray[10] = EEPROMBYTERead(TXB1D5);
DataArray[11] = EEPROMBYTERead(TXB1D6);
DataArray[12] = EEPROMBYTERead(TXB1D7);
} else {
EEPROMDataWrite(TXB1SIDH, &DataArray, 13);
}
SPILoadTX(CAN_LD_TXB1_ID, 13, DataArray);
//Configure TX BUFFER 2
DataArray[0] = 0xAA;
DataArray[1] = 0x03;
DataArray[2] = 0x33;
DataArray[3] = 0x33;
DataArray[4] = 0x08;
DataArray[5] = 0xAA;
DataArray[6] = 0xBB;
DataArray[7] = 0xCC;
DataArray[8] = 0xDD;
DataArray[9] = 0xEE;
DataArray[10] = 0xFF;
DataArray[11] = 0x0A;
DataArray[12] = 0x0B;
SPILoadTX(CAN_LD_TXB2_ID, 13, DataArray);
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(TXB2SIDH);
DataArray[1] = EEPROMBYTERead(TXB2SIDL);
DataArray[2] = EEPROMBYTERead(TXB2EID8);
DataArray[3] = EEPROMBYTERead(TXB2EID0);
DataArray[4] = EEPROMBYTERead(TXB2DLC);
DataArray[5] = EEPROMBYTERead(TXB2D0);
DataArray[6] = EEPROMBYTERead(TXB2D1);
DataArray[7] = EEPROMBYTERead(TXB2D2);
DataArray[8] = EEPROMBYTERead(TXB2D3);
DataArray[9] = EEPROMBYTERead(TXB2D4);
DataArray[10] = EEPROMBYTERead(TXB2D5);
DataArray[11] = EEPROMBYTERead(TXB2D6);
DataArray[12] = EEPROMBYTERead(TXB2D7);
} else {
EEPROMDataWrite(TXB2SIDH, &DataArray, 13);
}
SPISeqRead(TXB1SIDH, 13, ReadArray);
//Configure BIT TIMING
SOF_ENABLED; //Start-of-Frame signal enabled. Will set when "SetBitTiming()" is called
if (EEPROM_ver) {
DataArray[0] = EEPROMBYTERead(CNF3); //Load array
DataArray[1] = EEPROMBYTERead(CNF2); //
DataArray[2] = EEPROMBYTERead(CNF1); //
SPISeqWrite(CNF3, 3, DataArray); //Write registers
} else {
SetBitTiming(CAN_125kbps); //Note, this function puts device in Normal Mode
}
//Set Normal Mode and verify
SET_NORMAL;
SPIByteWrite(CANCTRL, CANCTRL_byte); //Write to CANCTRL
old_CANCTRL = 0x00;
//EEPROMCRCWrite(0,128);
//Verify Mode change
if ((SPIByteRead(CANSTAT)& 0xE0) != OPMODE_NORMAL)
SPIByteWrite(CANCTRL, CANCTRL_byte); //Try again
}
/******************************************************************************
* Function: void ProcessIO
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: This function is a place holder for other user routines.
* It is a mixture of both USB and non-USB tasks.
*
* Note: None
*****************************************************************************/
void ProcessIO(void) {
unsigned char n, b, c, y;
int a;
// User Application USB tasks
if (!(isUsbPowered)) //Only generate traffic if NOT connected to USB
{
CheckLoadButton();
CANLoadTX();
return;
}
if ((usb_device_state < CONFIGURED_STATE) || (UCONbits.SUSPND == 1)) return;
//----- Read USB buffer if it has data from the host -----
if (HIDRxReport(inbuffer, 64)) // USB receive buffer has data
{
LED_RX_ON(); //Turn LED on
T0CONbits.TMR0ON = 1; //Start timer for TX LED on time
gTimeout = 0; //Reset timout
//---- CANmsgs: Check if host has requested CAN messages to be transmited
switch (inbuffer[u_CANmsgs]) // interpret command
{
case 0x00: // No messages are available
break;
case 0x01: // Message 1 is available
GetUSBData(m1_SIDH, 13, DataArray);
n = SPILoadTX(CAN_LOAD_TX, 13, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
break;
case 0x02: // Message 1 and 2 are available
//Message 1
GetUSBData(m1_SIDH, m1_DLC + 5, DataArray);
n = SPILoadTX(CAN_LOAD_TX, m1_DLC + 5, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
//Message 2
GetUSBData(m2_SIDH, m2_DLC + 5, DataArray);
n = SPILoadTX(CAN_LOAD_TX, m2_DLC + 5, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
break;
case 0x03: // Message 1, 2, and 3 are available
//Message 1
GetUSBData(m1_SIDH, m1_DLC + 5, DataArray);
n = SPILoadTX(CAN_LOAD_TX, m1_DLC + 5, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
//Message 2
GetUSBData(m2_SIDH, m2_DLC + 5, DataArray);
n = SPILoadTX(CAN_LOAD_TX, m2_DLC + 5, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
//Message 3
GetUSBData(m3_SIDH, m3_DLC + 5, DataArray);
n = SPILoadTX(CAN_LOAD_TX, m3_DLC + 5, DataArray);
if (n == CAN_LD_TXB0_ID) //if TX0 is loaded
{
RTS0_2515_LOW();
RTS0_2515_HIGH();
} else if (n == CAN_LD_TXB1_ID) //if TX1 is loaded
{
RTS1_2515_LOW();
RTS1_2515_HIGH();
} else if (n == CAN_LD_TXB2_ID) //if TX2 is loaded
{
RTS2_2515_LOW();
RTS2_2515_HIGH();
}
break;
case 0x04: //--FUTURE-- Message 1, 2, 3, and 4 are available
break;
default: // unrecognized or null command
;
}// END switch: inbuffer[u_CANmsgs]
//---- CANCTRL: Write to the CANCTRL register if changed
if (inbuffer[u_CANCTRL] != old_CANCTRL) //If host sent new CANCTRL value
{
SPIByteWrite(CANCTRL, inbuffer[u_CANCTRL]); //Write to CANCTRL
EEPROMBYTEWrite(CANCTRL, inbuffer[u_CANCTRL]);
EEPROMCRCWrite(0, 128);
old_CANCTRL = inbuffer[u_CANCTRL]; //
outbuffer[u_CANSTAT] = SPIByteRead(CANSTAT);
while ((outbuffer[u_CANSTAT] & 0xE0) != (inbuffer[u_CANCTRL] & 0xE0))//if didn't change modes yet
{
outbuffer[u_CANSTAT] = SPIByteRead(CANSTAT);
}
UserFlag.USBsend = 1; //Set flag so will send USB message
}
//---- SPI: SPI command from host
if (inbuffer[u_SPI]) //If host sent SPI command (non-zero)
{
switch (inbuffer[u_SPI]) {
case CAN_RESET: //
SPIReset();
CANInit();
break;
case CAN_READ: //
if (!UserFlag.USBQueue) // If previous message is queued
{
outbuffer[u_SPI] = CAN_READ; //Send back to host
outbuffer[u_REG] = inbuffer[u_REG]; //Send back to host
outbuffer[u_DATA] = SPIByteRead(inbuffer[u_REG]); //Send back to host
}
UserFlag.USBsend = 1; //Set flag so will send USB message
UserFlag.USBQueue = 1; //Indicates msg is queued, but not sent
break;
case CAN_WRITE: //
//outbuffer[u_SPI] = 0; //Send back to host //JM
SPIByteWrite(inbuffer[u_REG], inbuffer[u_DATA]);
EEPROMBYTEWrite(inbuffer[u_REG], inbuffer[u_DATA]);
EEPROMCRCWrite(0, 128);
break;
case CAN_RTS: //
SPI_RTS(inbuffer[u_DATA]);
break;
case CAN_RD_STATUS: //
outbuffer[u_DATA] = SPIReadStatus();
UserFlag.USBsend = 1; //Set flag so will send USB message
break;
case FIRMWARE_VER_RD:
memmove(&outbuffer[u_STATUS], firmware_version, sizeof (firmware_version));
outbuffer[u_STATUS + sizeof (firmware_version)] = 0;
UserFlag.USBsend = 1; //Set flag so will send USB message
break;
default: // unrecognized or null command
;
}// END switch: inbuffer[u_SPI]
}
}//END if (HIDRxReport(inbuffer, 1)
//---- Check RXnBF pins and service messages as needed ---
switch (CheckCANRX()) // Check if CAN message received
{
case 0x01: // Message in RXB0 (Msgs in this buffer are Standard)
SPIReadRX(CAN_RD_START_RXB0SIDH, 13, ReadArray);
LoadUSBString(ReadArray);
break;
case 0x02: // Message in RXB1 (Msgs in this buffer are Extended)
SPIReadRX(CAN_RD_START_RXB1SIDH, 13, ReadArray);
LoadUSBString(ReadArray);
break;
case 0x03: // Message in RXB0 and RXB1
SPIReadRX(CAN_RD_START_RXB0SIDH, 13, ReadArray);
LoadUSBString(ReadArray);
SPIReadRX(CAN_RD_START_RXB1SIDH, 13, ReadArray);
LoadUSBString(ReadArray);
break;
default: // unrecognized or null command
;
}// END switch: CheckCANRX()
//---- The following turns off the TX and RX USB indicator LEDs after some time
//Inst. cycle = 200 ns; TMR0IF sets every 51 us
if (INTCONbits.TMR0IF) {
TimerCounter++;
if (!TimerCounter) //if rolled over, set flag. User code will handle the rest.
{
LED_TX_OFF(); //Turn LED off
LED_RX_OFF(); //Turn LED off
T0CONbits.TMR0ON = 0; //Start timer for TX LED on time
TimerCounter = 0xFE;
gTimeout = 1; //Reset timout
}
INTCONbits.TMR0IF = 0;
}
//------ Load USB Data to be transmitted to the host --------
if (UserFlag.MCP_RXBn | UserFlag.USBsend) {
if (!mHIDTxIsBusy()) {
HIDTxReport(outbuffer, 64);
outbuffer[0] = 0x00; //PKR$$$ Need this??
UserFlag.MCP_RXBn = 0; //clear flag
UserFlag.USBsend = 0; //clear flag
UserFlag.USBQueue = 0; //Clear message queue
LED_TX_ON(); //Turn LED on
T0CONbits.TMR0ON = 1; //Start timer for TX LED on time
gTimeout = 0; //Reset timout
outbuffer[u_SPI] = 0x00; //clear back to 00h so host doesn't detect "SPI response"
USB_ptr = 0xFF; //Point to location 0xFF
outbuffer[u_CANmsgs] = 0x00; //Clear message status
}
}
}//end ProcessIO
/*!
\brief open spi communication port to be used for communicating with a SimpleLink device
Given an interface name and option flags, this function opens the spi communication port
and creates a file descriptor. This file descriptor can be used afterwards to read and
write data from and to this specific spi channel.
The SPI speed, clock polarity, clock phase, chip select and all other attributes are all
set to hardcoded values in this function.
\param ifName - points to the interface name/path. The interface name is an
optional attributes that the simple link driver receives
on opening the device. in systems that the spi channel is
not implemented as part of the os device drivers, this
parameter could be NULL.
\param flags - option flags
\return upon successful completion, the function shall open the spi channel and return
a non-negative integer representing the file descriptor.
Otherwise, -1 shall be returned
\sa spi_Close , spi_Read , spi_Write
\note
\warning
*/
Fd_t spi_Open(char *ifName, unsigned long flags)
{
unsigned long ulBase;
//NWP master interface
ulBase = LSPI_BASE;
//Enable MCSPIA2
PRCMPeripheralClkEnable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
//Disable Chip Select
SPICSDisable(ulBase);
//Disable SPI Channel
SPIDisable(ulBase);
// Reset SPI
SPIReset(ulBase);
//
// Configure SPI interface
//
SPIConfigSetExpClk(ulBase,PRCMPeripheralClockGet(PRCM_LSPI),
SPI_IF_BIT_RATE,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_32));
if(PRCMPeripheralStatusGet(PRCM_UDMA))
{
g_ucDMAEnabled = (HWREG(UDMA_BASE + UDMA_O_CTLBASE) != 0x0) ? 1 : 0;
}
else
{
g_ucDMAEnabled = 0;
}
#ifdef SL_CPU_MODE
g_ucDMAEnabled = 0;
#endif
if(g_ucDMAEnabled)
{
memset(g_ucDinDout,0xFF,sizeof(g_ucDinDout));
//g_ucDout[0]=0xFF;
//Simplelink_UDMAInit();
// Set DMA channel
cc_UDMAChannelSelect(UDMA_CH12_LSPI_RX);
cc_UDMAChannelSelect(UDMA_CH13_LSPI_TX);
SPIFIFOEnable(ulBase,SPI_RX_FIFO);
SPIFIFOEnable(ulBase,SPI_TX_FIFO);
SPIDmaEnable(ulBase,SPI_RX_DMA);
SPIDmaEnable(ulBase,SPI_TX_DMA);
SPIFIFOLevelSet(ulBase,1,1);
#if defined(SL_PLATFORM_MULTI_THREADED)
osi_InterruptRegister(INT_LSPI, (P_OSI_INTR_ENTRY)DmaSpiSwIntHandler,INT_PRIORITY_LVL_1);
SPIIntEnable(ulBase,SPI_INT_EOW);
osi_MsgQCreate(&DMAMsgQ,"DMAQueue",sizeof(int),1);
#else
IntRegister(INT_LSPI,(void(*)(void))DmaSpiSwIntHandler);
IntPrioritySet(INT_LSPI, INT_PRIORITY_LVL_1);
IntEnable(INT_LSPI);
SPIIntEnable(ulBase,SPI_INT_EOW);
g_cDummy = 0x0;
#endif
}
SPIEnable(ulBase);
g_SpiFd = 1;
return g_SpiFd;
}
