/*
* @brief Writes data into the specified accelerometer register.
*
* @param addr specifies where the register is
* @param data to be written into the register
* @returns void
*/
void accelerometer_write_register(uint8 addr, uint8 data) {
uint32 buffer;
SPISelectDevice(SPI_ACCELEROMETER);
MAP_SSIDataPut(SSI0_BASE, ACCEL_WRITE_BIT | (addr & 0x3F));
MAP_SSIDataGet(SSI0_BASE, &buffer);
MAP_SSIDataPut(SSI0_BASE, data);
MAP_SSIDataGet(SSI0_BASE, &buffer);
SPIDeselect();
}
/*
* @brief Reads the accelerometer register from the specified address.
*
* @param addr specifies where the register is
* @returns the data contained in the register
*/
uint8 accelerometer_read_register(uint8 addr) {
uint32 buffer;
SPISelectDevice(SPI_ACCELEROMETER);
MAP_SSIDataPut(SSI0_BASE, ACCEL_READ_BIT | (addr & 0x3F));
MAP_SSIDataGet(SSI0_BASE, &buffer);
MAP_SSIDataPut(SSI0_BASE, 0x00);//dummy read
MAP_SSIDataGet(SSI0_BASE, &buffer);
SPIDeselect();
return (uint8) buffer;
}
//*****************************************************************************
//
// Internal helper function that sends a buffer of data to the TRF79x0, used
// by all the functions that need to send bytes.
//
//*****************************************************************************
void
SSITRF79x0GenericWrite(unsigned char const *pucBuffer, unsigned int uiLength)
{
uint32_t ulDummyData;
while(uiLength > 0)
{
//
// Write address/command/data and clear SSI register of dummy data.
//
MAP_SSIDataPut(TRF79X0_SSI_BASE, (unsigned long)*pucBuffer);
//
// Wait until the SSI Module is completed sending uiLength bytes to the SSI module.
//
while(SSIBusy(TRF79X0_SSI_BASE) == true);
MAP_SSIDataGet(TRF79X0_SSI_BASE, &ulDummyData);
//
// Post increment counters.
//
pucBuffer++;
uiLength--;
}
}
//*****************************************************************************
//
// Internal helper function that receives a buffer of data from the TRF79x0,
// used by all the functions that need to read bytes.
//
//*****************************************************************************
static void
SSITRF79x0GenericRead(unsigned char *pucBuffer, unsigned int uiLength)
{
uint32_t ulData;
while(uiLength > 0)
{
//
// Write dummy data for SSI clock and read data from SSI register.
//
MAP_SSIDataPut(TRF79X0_SSI_BASE, (unsigned long)SSI_NO_DATA);
//
// Wait until the SSI Module is completed sending uiLength bytes to the SSI module.
//
while(SSIBusy(TRF79X0_SSI_BASE) == true);
MAP_SSIDataGet(TRF79X0_SSI_BASE, &ulData);
// SSIDataGet(TRF79X0_SSI_BASE, &ulData);
//
// Read data into buffers and post increment counters.
//
*pucBuffer++ = (unsigned char)ulData;
uiLength--;
}
}
inline uint16_t enc28_SPISend(uint16_t ui16_rw) {
uint32_t ui32_rx_val;
MAP_SSIDataPut(ui32_SSIx, ui16_rw);
while(MAP_SSIBusy(SSI0_BASE));
MAP_SSIDataGet(ui32_SSIx, &ui32_rx_val);
return (uint16_t)ui32_rx_val;
}
/*
* @brief Reset the top board by transmitting a reset message to bottom board.
* @return void
*/
void hardReset() {
uint32 data, i;
uint8 MSP430MessageOut[MSP430_MSG_LENGTH];
// Set up bottomboard SPI channel
SPIConfigureDevice(SPI_MSP430);
SPISelectDeviceISR(SPI_MSP430);
// Pack reset message
for (i = 0; i < MSP430_CODE_LENGTH; i++) {
MSP430MessageOut[i] = MSP430Code[i];
}
for (i = MSP430_CODE_LENGTH; i < MSP430_MSG_LENGTH; i ++) {
MSP430MessageOut[i] = 0;
}
MSP430MessageOut[MSP430_CMD_COMMAND_IDX] = MSP430_CMD_COMMAND_RESET;
MSP430MessageOut[MSP430_CMD_CHECKSUM_IDX] = MSP430_CMD_COMMAND_RESET;
// Send reset message. Syncing is done on the bottomboard side
while (1) {
for (i = 0; i < MSP430_MSG_LENGTH; i++) {
MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)MSP430MessageOut[i]);
MAP_SSIDataGet(SSI0_BASE, &data);
systemDelay(1);
}
}
}
uint8_t spiTransfer(uint8_t data)
{
uint32_t ret;
MAP_SSIDataPut(SSI2_BASE, data);
MAP_SSIDataGet(SSI2_BASE, &ret);
return (uint8_t) (ret & 0xFF);
}
uint8_t spi_transferByte(uint8_t data){
unsigned long rxdata;
MAP_SSIDataPut(SSI0_BASE,data);
MAP_SSIDataGet(SSI0_BASE,&rxdata);
return (rxdata&0xFF);
}
/*
* private function
*/
int32 accelerometer_read_register_16(uint8 addr) {
uint32 data_low;
uint32 data_high;
int32 value;
SPISelectDevice(SPI_ACCELEROMETER);
MAP_SSIDataPut(SSI0_BASE, ACCEL_READ_BIT | ACCEL_ADDR_INC_BIT | (addr & 0x3F));
MAP_SSIDataGet(SSI0_BASE, &data_low);
MAP_SSIDataPut(SSI0_BASE, 0x00);
MAP_SSIDataGet(SSI0_BASE, &data_low);
MAP_SSIDataPut(SSI0_BASE, 0x00);
MAP_SSIDataGet(SSI0_BASE, &data_high);
SPIDeselect();
value = (int32)((int16)((uint16)data_high << 8) | ((uint16)data_low));
// need to manually sign extend because this stupid complier does not
if (value & 0x8000) {
value |= 0xFFFF0000;
}
return value;
}
/*
* @brief Cancels all selections. Then immediately sends a byte of 0xFF.
*
* Makes all SPI devices inactive. Then immediately sends a byte of 0xFF.
* @returns void
*/
void SPIDeselectSynchronous(void) {
// do the actual deselect
SPIDeselectISR();
//Send a 0xFF byte
//Load up the data and send it
uint32 rcvdat;
MAP_SSIDataPut(SSI0_BASE, 0xFF); /* Write the data to the tx fifo */
MAP_SSIDataGet(SSI0_BASE, &rcvdat); /* flush data read during the write */
// wait until the last transfer is finished
volatile uint16 i = 0;
while (MAP_SSIBusy(SSI0_BASE)) {
i++;
if (i > SPI_MAX_XFER_IRQ_DELAY) {
return;
}
}
}
uint8_t spi_send(uint8_t c) {
unsigned long val;
MAP_SSIDataPut(SSI2_BASE, c);
MAP_SSIDataGet(SSI2_BASE, &val);
return (uint8_t)val;
}
spi_data_type platform_spi_send_recv( unsigned id, spi_data_type data )
{
MAP_SSIDataPut( spi_base[ id ], data );
MAP_SSIDataGet( spi_base[ id ], &data );
return data;
}
/*
* @brief MSP430 Boot Loader Handler
*
* This method sends bytes periodically to the MSP430 to handle the boot loader function
* It transmits bytes about every 32us, which is about as fast as the MSP430 can Handle
* @returns void
*/
void msp430BSLHandler(){
uint32 data;
// clear the timer interrupt for the next time
TimerIntClear(TIMER1_BASE, TIMER_TIMB_TIMEOUT);
if(spiState == SPI_STATE_DESELECT){
SPIDeselectISR();
spiState = SPI_STATE_XMIT;
MAP_TimerLoadSet(TIMER1_BASE, TIMER_B, MSP430_BSL_BYTE_PERIOD);
MAP_TimerEnable(TIMER1_BASE, TIMER_B);
} else if(spiState == SPI_STATE_XMIT){
//get ready to transmit and set spiState to deselect soon
SPISelectDeviceISR(SPI_MSP430);
spiState = SPI_STATE_DESELECT;
MAP_TimerLoadSet(TIMER1_BASE, TIMER_B, MSP430_BSL_DESELECT_PERIOD);
MAP_TimerEnable(TIMER1_BASE, TIMER_B);
switch(armState){
case ARM_STATE_SYNC: {
uint32 i; // short delay to make sure the bottomboard is ready
for (i = 0; i < 10000; i++);
// Send a ready message and wait for a response that the MSP is also ready
armMessage = (ARM_MSG_VALID_MSG_BITS | ARM_MSG_READY_BIT);
MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)armMessage);
MAP_SSIDataGet(SSI0_BASE, &data);
if((uint8)data == (MSP430_MSG_VALID_MSG_BITS | MSP430_MSG_READY_BIT)) {
armState = ARM_STATE_INIT_TRANSMISSION_1;
} else {
// Failure this time, try again
armState = ARM_STATE_SYNC;
}
break;
}
case ARM_STATE_INIT_TRANSMISSION_1:
// Send the message that we want to start
armMessage = (ARM_MSG_VALID_MSG_BITS | ARM_MSG_NEW_TRANS_BIT);
MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)armMessage);
MAP_SSIDataGet(SSI0_BASE, &data);
// Get the response
armState = ARM_STATE_INIT_TRANSMISSION_2;
break;
case ARM_STATE_INIT_TRANSMISSION_2:
// Get the response back, data that is sent is junk
armMessage = (ARM_MSG_VALID_MSG_BITS | ARM_MSG_READY_BIT);
MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)armMessage);
MAP_SSIDataGet(SSI0_BASE, &data);
if((uint8)data == (MSP430_MSG_VALID_MSG_BITS | MSP430_MSG_CONFIRM_BIT)){
// Toggle the Blinky LED
blinkyLEDToggleState = !blinkyLEDToggleState;
blinkyLedSet(blinkyLEDToggleState);
//the last transmission was validated. We need to set up a new section of data for TX
if(transmissionState == BSL_VALID_TRANSMISSION){
if(dataIndex == MSP430_PROGRAM[currentSection].MSP430_SECTION_SIZE){
// the previous data transmission included the last portion of the previous data section
// so we need to increment the currentSection variable to indicate we are now on the next
// data section
currentSection++;
dataStartAddress = MSP430_PROGRAM[currentSection].MSP430_SECTION_ADDRESS;
dataIndex = 0;
} else {
//The previous data transmission left off somewhere in the middle of a large chunk of data.
dataStartAddress = MSP430_PROGRAM[currentSection].MSP430_SECTION_ADDRESS + dataIndex;
}
} else if(transmissionState == BSL_INVALID_TRANSMISSION){
//last section of data failed validation. Bring dataIndex back to the starting address
//of previous section for retransmission
dataIndex = 0;
transmissionState = BSL_VALID_TRANSMISSION;
}
// Calculate the length of the data to send
if((dataIndex + 64) > MSP430_PROGRAM[currentSection].MSP430_SECTION_SIZE){
//we cannot construct another transmission of 64 bytes so we need to make the message
//end at the end of section of data.
dataLength = MSP430_PROGRAM[currentSection].MSP430_SECTION_SIZE - dataIndex;
} else {
dataLength = 64;
}
// Set up the data fields
setupData[0] = dataLength;
setupData[1] = (uint8)(dataStartAddress >> 8);
setupData[2] = (uint8)(dataStartAddress);
checksum = calcMessageChecksum(setupData, 0, 3);
setupData[3] = (uint8)(checksum >> 8);
setupData[4] = (uint8)checksum;
setupIndex = 0;
armState = ARM_STATE_SETUP_TRANSMISSION;
} else {
/*
* @brief Expansion0 MSP430 board ISR
*
* @returns void
*/
uint8 expand0BoardISR() {
uint32 data, i;
uint32 timerLoadPeriod;
uint8 checksum;
long val;
static uint8 gripperData = 0;
TimerIntClear(TIMER1_BASE, TIMER_TIMB_TIMEOUT);
// Multiplex outputs (gripper/radio), set delay
if (MSPSPIState == MSPSPI_STATE_XMIT_BYTE) {
radioIntDisable();
SPISelectDeviceISR(SPI_EXPAND0);
timerLoadPeriod = MSP430_SPI_DESELECT_PERIOD;
} else if (MSPSPIState == MSPSPI_STATE_DESELECT_SPI) {
SPIDeselectISR();
radioIntEnable();
timerLoadPeriod = (MSP430_SPI_BYTE_PERIOD);
}
MAP_TimerLoadSet(TIMER1_BASE, TIMER_B, timerLoadPeriod);
MAP_TimerEnable(TIMER1_BASE, TIMER_B);
// Transmit a byte or just switch state
if (MSPSPIState == MSPSPI_STATE_XMIT_BYTE) {
// Pack message
if (expand0MessageIdx == 0) {
// Grab next message from buffer
if (!expand0MessageOutBufLock) {
memcpy(expand0MessageOut, expand0MessageOutBuf, EXPAND0_MSG_LENGTH);
}
}
// Rotate received buffer
shiftBuffer(expand0MessageIn, EXPAND0_MSG_LENGTH);
// Put data into the transmit buffer
val = MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)expand0MessageOut[expand0MessageIdx]);
// Retrieve the received byte
MAP_SSIDataGet(SSI0_BASE, &data);
// Put byte the the end of the received buffer
expand0MessageIn[EXPAND0_MSG_LENGTH - 1] = data;
//Integrity checking
if (expand0MessageIdx == 0) {
// Checkcode
for (i = 0; i < EXPAND0_CODE_LENGTH; i++) {
if (expand0MessageIn[i] != expand0Code[i])
break;
}
if (i == EXPAND0_CODE_LENGTH) {
// Checksum
checksum = messageChecksum(expand0MessageIn, EXPAND0_CODE_LENGTH, EXPAND0_MSG_LENGTH);
if (checksum == expand0MessageIn[EXPAND0_MSG_LENGTH - 1]) {
// Avoid loading from buffer if the buffer is updating
if (!expand0MessageInBufLock) {
memcpy(expand0MessageInBuf, expand0MessageIn, EXPAND0_MSG_LENGTH);
}
} else {
// Fail checksum
if (showError) {cprintf("Gsum ");}
}
} else {
// Fail checkcode
if (showError) {cprintf("Gcod ");}
}
// Toggle MSP boards, regardless of result
MSPSelect = MSP_BOTTOM_BOARD_SEL;
}
// Increment index, wrap back to 0 if it exceeds the range
expand0MessageIdx++;
if (expand0MessageIdx >= EXPAND0_MSG_LENGTH) {
expand0MessageIdx = 0;
}
// Toggle states
MSPSPIState = MSPSPI_STATE_DESELECT_SPI;
} else if (MSPSPIState == MSPSPI_STATE_DESELECT_SPI) {
// Toggle states
MSPSPIState = MSPSPI_STATE_XMIT_BYTE;
}
return 0;
}
uint8 bottomBoardISR() {
uint32 data, i;
uint32 timerLoadPeriod;
uint8 checksum;
long val;
TimerIntClear(TIMER1_BASE, TIMER_TIMB_TIMEOUT);
// Multiplex SPI (bottomboard/radio)
if (MSPSPIState == MSPSPI_STATE_XMIT_BYTE) {
radioIntDisable();
SPISelectDeviceISR(SPI_MSP430);
timerLoadPeriod = MSP430_SPI_DESELECT_PERIOD;
} else if (MSPSPIState == MSPSPI_STATE_DESELECT_SPI) {
SPIDeselectISR();
radioIntEnable();
if (bootloaderSet && MSP430MessageIdx == 0) {
// Deselect but then set the boot-loader to operate.
msp430BSLInit();
bootloaderSet = FALSE;
} else {
timerLoadPeriod = MSP430_SPI_BYTE_PERIOD;
}
}
// Set delay
MAP_TimerLoadSet(TIMER1_BASE, TIMER_B, timerLoadPeriod);
MAP_TimerEnable(TIMER1_BASE, TIMER_B);
// Transmit message to bottomboard
if (MSPSPIState == MSPSPI_STATE_XMIT_BYTE) {
// Pack new message at the beginning of each cycle
if (MSP430MessageIdx == 0) {
// Pack code
for (i = 0; i < MSP430_CODE_LENGTH; i++) {
MSP430MessageOut[i] = MSP430Code[i];
}
// Build and pack payload
switch (msp430SystemGetCommandMessage()) {
case MSP430_CMD_COMMAND_NORMAL:
blinkySystemBuildMessage(&MSP430MessageOut[MSP430_CMD_SYSTEM_LED_IDX]);
buttonsBuildMessage(&MSP430MessageOut[MSP430_CMD_BUTTONS_IDX]);
ledsBuildMessage(&MSP430MessageOut[MSP430_CMD_LED_IDX]);
break;
case MSP430_CMD_COMMAND_REPROGRAM:
bootloaderSet = TRUE;
break;
default:
// Do nothing for shutdown or reset
break;
}
msp430SystemCommandBuildMessage(&MSP430MessageOut[MSP430_CMD_COMMAND_IDX]);
MSP430MessageOut[MSP430_CMD_CHECKSUM_IDX] = messageChecksum(MSP430MessageOut, MSP430_CODE_LENGTH, MSP430_MSG_LENGTH);
}
// Shift receive buffer
shiftBuffer(MSP430MessageIn, MSP430_MSG_LENGTH);
// Put data into the transmit buffer
val = MAP_SSIDataPutNonBlocking(SSI0_BASE, (uint32)MSP430MessageOut[MSP430MessageIdx]);
if (val == 0) {
SPIBusError_SSIDataPutNonBlocking = 1;
}
// Retrieve the received byte
MAP_SSIDataGet(SSI0_BASE, &data);
// Put byte the the end of the receive buffer
MSP430MessageIn[MSP430_MSG_LENGTH - 1] = data;
// Check to see if we have a complete message, with correct code and checksum
if (MSP430MessageIdx == 0) {
// Checkcode
for (i = 0; i < MSP430_CODE_LENGTH; i++) {
if (MSP430MessageIn[i] != MSP430Code[i])
break;
}
if (i == MSP430_CODE_LENGTH) {
// Checksum
checksum = messageChecksum(MSP430MessageIn, MSP430_CODE_LENGTH, MSP430_MSG_LENGTH);
if (checksum == MSP430MessageIn[MSP430_MSG_LENGTH - 1]) {
// Process incoming message
bumpSensorsUpdate(MSP430MessageIn[MSP430_MSG_BUMPER_IDX]);
accelerometerUpdate(&MSP430MessageIn[MSP430_MSG_ACCEL_START_IDX]);
gyroUpdate(&MSP430MessageIn[MSP430_MSG_GYRO_START_IDX]);
systemBatteryVoltageUpdate(MSP430MessageIn[MSP430_MSG_VBAT_IDX]);
systemUSBVoltageUpdate(MSP430MessageIn[MSP430_MSG_VUSB_IDX]);
systemPowerButtonUpdate(MSP430MessageIn[MSP430_MSG_POWER_BUTTON_IDX]);
systemMSPVersionUpdate(MSP430MessageIn[MSP430_MSG_VERSION_IDX]);
reflectiveSensorsUpdate(&MSP430MessageIn[MSP430_MSG_REFLECT_START_IDX]);
if((MSP430MessageIn[MSP430_MSG_VERSION_IDX] != 0) && (!systemMSP430CommsValid)) {
systemMSP430CommsValid = TRUE;
}
} else {
checksumFailure++;
// Fail checksum
if (showError) {cprintf("Bsum ");}
}
} else {
// Fail checkcode
if (showError) {cprintf("Bcod ");}
}
// Toggle MSP boards, regardless of result
if (expand0En) {
MSPSelect = MSP_EXPAND0_BOARD_SEL;
}
}
// Increment index, wrap back to 0 if it exceeds the range
MSP430MessageIdx++;
if (MSP430MessageIdx >= MSP430_MSG_LENGTH) {
MSP430MessageIdx = 0;
}
// Toggle states
MSPSPIState = MSPSPI_STATE_DESELECT_SPI;
} else if (MSPSPIState == MSPSPI_STATE_DESELECT_SPI) {
// Toggle states
MSPSPIState = MSPSPI_STATE_XMIT_BYTE;
}
return 0;
}
