void InitSpiGpio()
{
#if DSP28_SPIA
InitSpiaGpio();
#endif // endif DSP28_SPIA
#if DSP28_SPIB
InitSpibGpio();
#endif // endif DSP28_SPIB
}
void main(void)
{
InitSysCtrl();
InitSpiaGpio();
Gpio_select();
/*
EALLOW;
SysCtrlRegs.WDCR = 0x00AF; // re-enable the watchdog
EDIS;
*/
DINT;
IER = 0x0000;
IFR = 0x0000;
InitPieCtrl();
InitPieVectTable();
InitAdc();
spi_fifo_init();
Setup_ePWM(); // ePWM
Setup_ADC(); // ADC setup
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.SPIRXINTA = &spiRxFifoIsr;
PieVectTable.SPITXINTA = &spiTxFifoIsr;
PieVectTable.SEQ1INT = &adc1_isr;
PieVectTable.EPWM1_INT = &ePWM1A_compare_isr;
EDIS; // This is needed to disable write to EALLOW protected registers
PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
PieCtrlRegs.PIEIER6.bit.INTx1 = 1; // Enable PIE Group 6, INT 1
PieCtrlRegs.PIEIER6.bit.INTx2 = 1; // Enable PIE Group 6, INT 2
PieCtrlRegs.PIEIER1.bit.INTx1 = 1; // adc1 (seq1 - pwm)
PieCtrlRegs.PIEIER3.bit.INTx1 = 1; // epwm1
IER |= 25; // Enable CPU INT6
EINT; // Enable Global Interrupts
ERTM;
while (1)
{
if (AdcRegs.ADCST.bit.INT_SEQ1 == 1) // ADC seq1 interrupt for pwm (at prd)
{
flag1 = 1;
AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
}
if (EPwm1Regs.ETFLG.bit.INT == 1) // epwm interrupt for pwm of second converter (at prd)
{
flag2 = 1;
EPwm1Regs.ETCLR.bit.INT = 1;
}
}
}
void InitSpiGpio()
{
InitSpiaGpio();
}
void init_SPI(void){
/*****************************************************/
/********* SPI *************************************/
EALLOW;
GpioCtrlRegs.GPAMUX1.bit.GPIO9 = 0;
GpioCtrlRegs.GPAMUX1.bit.GPIO10 = 0;
GpioCtrlRegs.GPAMUX1.bit.GPIO11 = 0;
GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 0;
GpioCtrlRegs.GPADIR.bit.GPIO6 = 1;
GpioCtrlRegs.GPADIR.bit.GPIO9 = 1;
GpioCtrlRegs.GPADIR.bit.GPIO10 = 1;
GpioCtrlRegs.GPADIR.bit.GPIO11 = 1;
GpioCtrlRegs.GPADIR.bit.GPIO22 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO6 = 1;
GpioDataRegs.GPASET.bit.GPIO9 = 1;
GpioDataRegs.GPASET.bit.GPIO10 = 1;
GpioDataRegs.GPASET.bit.GPIO11 = 1;
GpioDataRegs.GPASET.bit.GPIO22 = 1;
EDIS;
InitSpiaGpio();
EALLOW;
// SS for DAC7564
GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 0; // use GPIO19 for SS
GpioDataRegs.GPASET.bit.GPIO19 = 1; // enabled
GpioCtrlRegs.GPADIR.bit.GPIO19 = 1; // GPIO19 as output
EDIS;
SpiaRegs.SPICCR.bit.SPISWRESET = 0; // Put SPI in reset
SpiaRegs.SPICCR.bit.CLKPOLARITY = 0; // set for LS7366
SpiaRegs.SPICTL.bit.CLK_PHASE = 1;
SpiaRegs.SPICCR.bit.SPICHAR = 7; // set to transmitt 8 bits
SpiaRegs.SPICTL.bit.MASTER_SLAVE = 1;
SpiaRegs.SPICTL.bit.TALK = 1;
SpiaRegs.SPICTL.bit.SPIINTENA = 0;
SpiaRegs.SPISTS.all=0x0000;
SpiaRegs.SPIBRR = 39; // divide by 40 2.5 Mhz
SpiaRegs.SPIFFTX.bit.SPIRST = 1;
SpiaRegs.SPIFFTX.bit.SPIFFENA = 1;
SpiaRegs.SPIFFTX.bit.TXFIFO = 0;
SpiaRegs.SPIFFTX.bit.TXFFINTCLR = 1;
SpiaRegs.SPIFFRX.bit.RXFIFORESET = 0;
SpiaRegs.SPIFFRX.bit.RXFFOVFCLR = 1;
SpiaRegs.SPIFFRX.bit.RXFFINTCLR = 1;
SpiaRegs.SPIFFRX.bit.RXFFIL = 5;
SpiaRegs.SPIFFRX.bit.RXFFIENA = 0;
SpiaRegs.SPIFFCT.all=0x00;
SpiaRegs.SPIPRI.bit.FREE = 1;
SpiaRegs.SPIPRI.bit.SOFT = 0;
SpiaRegs.SPICCR.bit.SPISWRESET = 1; // Pull the SPI out of reset
SpiaRegs.SPIFFTX.bit.TXFIFO=1;
SpiaRegs.SPIFFRX.bit.RXFIFORESET=1;
SpiaRegs.SPIFFRX.bit.RXFFIL = 1;
GpioDataRegs.GPACLEAR.bit.GPIO9 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO10 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO11 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO22 = 1;
SpiaRegs.SPITXBUF = ((unsigned)0x20)<<8; // CLR COUNT all four chips
while (SpiaRegs.SPIFFRX.bit.RXFFST != 1) {}
GpioDataRegs.GPASET.bit.GPIO9 = 1;
GpioDataRegs.GPASET.bit.GPIO10 = 1;
GpioDataRegs.GPASET.bit.GPIO11 = 1;
GpioDataRegs.GPASET.bit.GPIO22 = 1;
SPIbyte1 = SpiaRegs.SPIRXBUF;
SpiaRegs.SPIFFRX.bit.RXFFIL = 2;
GpioDataRegs.GPACLEAR.bit.GPIO9 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO10 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO11 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO22 = 1;
SpiaRegs.SPITXBUF = ((unsigned)0x88)<<8; // WR to MDR0
SpiaRegs.SPITXBUF = ((unsigned)0x83)<<8;
while (SpiaRegs.SPIFFRX.bit.RXFFST != 2) {}
GpioDataRegs.GPASET.bit.GPIO9 = 1;
GpioDataRegs.GPASET.bit.GPIO10 = 1;
GpioDataRegs.GPASET.bit.GPIO11 = 1;
GpioDataRegs.GPASET.bit.GPIO22 = 1;
SPIbyte1 = SpiaRegs.SPIRXBUF;
SPIbyte2 = SpiaRegs.SPIRXBUF;
SpiaRegs.SPIFFRX.bit.RXFFIL = 2;
GpioDataRegs.GPACLEAR.bit.GPIO9 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO10 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO11 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO22 = 1;
SpiaRegs.SPITXBUF = ((unsigned)0x90)<<8; // WR MDR0
SpiaRegs.SPITXBUF = 0x00<<8;
while (SpiaRegs.SPIFFRX.bit.RXFFST != 2) {}
GpioDataRegs.GPASET.bit.GPIO9 = 1;
GpioDataRegs.GPASET.bit.GPIO10 = 1;
GpioDataRegs.GPASET.bit.GPIO11 = 1;
GpioDataRegs.GPASET.bit.GPIO22 = 1;
SPIbyte1 = SpiaRegs.SPIRXBUF;
SPIbyte2 = SpiaRegs.SPIRXBUF;
SpiaRegs.SPICTL.bit.SPIINTENA = 1;
SpiaRegs.SPIFFRX.bit.RXFFOVFCLR = 1;
SpiaRegs.SPIFFRX.bit.RXFFINTCLR = 1;
SpiaRegs.SPIFFRX.bit.RXFFIENA = 1;
/********* SPI *************************************/
/*****************************************************/
// SPI
PieCtrlRegs.PIEACK.all = PIEACK_GROUP6; // Acknowledge interrupt to PIE
PieCtrlRegs.PIEIER6.bit.INTx1 = 1; //Enable PIE 6.1 interrupt
}
void main(void)
{
//Enable peripheral clocks and other things
//F2837xD_SysCtrl.c
InitSysCtrl();
EALLOW;
GpioCtrlRegs.GPAMUX1.all = 0x00000000; // All GPIO
GpioCtrlRegs.GPAMUX2.all = 0x00000000; // All GPIO
GpioCtrlRegs.GPBMUX1.all = 0x00000000; // All GPIO
GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF; // All outputs
GpioCtrlRegs.GPBDIR.all = 0x00001FFF; // All outputs
EDIS;
//InitGpio();
//initalize GPIO
InitSpiaGpio();
DINT;
InitPieCtrl();
// Disable CPU __interrupts and clear all CPU __interrupt flags:
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW; //This is needed to write to EALLOW protected registers
ClkCfgRegs.LOSPCP.bit.LSPCLKDIV = 0x5; //LSPCLK (200 Mhz)/10
//-----------------------------------------------------------------------------------
//Instantiate CPU timer control
//CPU timer interrupt services in prototype phase
EALLOW;
PieVectTable.TIMER0_INT = &cpu_timer0_isr;
PieVectTable.TIMER1_INT = &cpu_timer1_isr;
PieVectTable.TIMER2_INT = &cpu_timer2_isr;
EDIS; //This is needed to disable write to EALLOW protected registers
InitCpuTimers();
// Configure CPU-Timer 0, 1, and 2 to interrupt every second:
// 200MHz CPU Freq, 1 second Period (in uSeconds)
ConfigCpuTimer(&CpuTimer0, 200, 100000);
ConfigCpuTimer(&CpuTimer1, 200, 10000000);
ConfigCpuTimer(&CpuTimer2, 200, 1000000);
// To ensure precise timing, use write-only instructions to write to the entire register. Therefore, if any
// of the configuration bits are changed in ConfigCpuTimer and InitCpuTimers (in F2837xD_cputimervars.h), the
// below settings must also be updated.
CpuTimer0Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
CpuTimer1Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
CpuTimer2Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
// Enable CPU int1 which is connected to CPU-Timer 0, CPU int13
// which is connected to CPU-Timer 1, and CPU int 14, which is connected
// to CPU-Timer 2:
IER |= M_INT1;
IER |= M_INT13;
IER |= M_INT14;
// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
//Enable interrupts
//End CPU timer configuration
//-----------------------------------------------------------------------------------
spi_init();
spi_fifo();
output_high();
DELAY_US(1000000);
LTC_wakeup();
/*
//LTC ADCV read voltage functions here ---
//Note: Additional ADC readings may be possible i.e Sum of Measurement cells,
LTC_refon_set();
LTC_ADC_clear();
//LTC_ADC_conversion();
//----------------------------------------
//need to somehow clear receive buffer
SpiaRegs.SPIFFRX.bit.RXFFOVFCLR = 1;
//LTC_read_voltages_123();
//LTC_read_voltages_456();
//LTC_read_voltages_789();
//LTC_read_voltages_10_11_12();
//LTC_UVOV_get_flags();
//ready_rxbuf();
//read_voltage_from_receive_buffer();
//receive_all_data();
//LTC_read_UVOV_flags();
//read_voltage_from_receive_buffer();
//Uint16 checker[6] = {rdata[0], rdata[1], rdata[2], rdata[3], rdata[4], rdata[5]};
//Uint16 PEC_check = LTC_pec_calc(checker, 6);
*/
//------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
for(;;) //infinite loop
{
//incorporate a regular LTC_wakeup procedure (< 2.0 seconds)
//incorporate a regular LTC pulse signal (< 1.5 seconds)
//It is important to regularly pulse wake up and pulse signals to the
//LTC6804-2 and LTC3300 boards so that the Watchdog Timer does not expire
//LTC6804-2 ADC reference ON
//LTC3300 72 pulse cycle of an execute command repeatedly operating
}
}
void SPI_Init() {
InitSpiaGpio();
InitSPIConfig();
}
