Hi,
I amended the "adc_soc_epwm_cpu01" to include a serial communication interface (SCI) as in the showed codes below. I want to transmit the result of the Adc (AdcaResults) to the hyperterminal. the terminal work and I received the hello World and Conversion finished messages but It did't receive the adcaResults. I used an sprintf in order to store the interger in an string array but the terminal didn't receive anything.
May main question is what changes should I do to be able to transmit the adc results.
my second question, where should I place the sending message as I tried two places, one is highlighted in the red color and the other in green in the adc_isr. both places at the moment are not sending the message. however, the one in the isr makes the conversion results incorrect.
many thanks for your help
regards
/
// Included Files
//
#include "F28x_Project.h"
//#include "stdio.h"
//
// Function Prototypes
//
void ConfigureADC(void);
void ConfigureEPWM(void);
void SetupADCEpwm(Uint16 channel);
interrupt void adca1_isr(void);
//interrupt void adcb1_isr(void);
//interrupt void adcd1_isr(void);
void scia_echoback_init(void);
void scia_fifo_init(void);
void scia_xmit(int a);
void scia_msg(char *msg);
//void scia_sprintfmsg(int *msg); // I added this line
//
// Defines
//
#define RESULTS_BUFFER_SIZE 64
//#define ADC_SAMPLE_PERIOD 0x1000 // 1999 = 50 kHz sampling w/ 100 MHz ePWM clock
//
// Globals
//
Uint16 AdcaResults[RESULTS_BUFFER_SIZE];
float32 AdcaResults1[RESULTS_BUFFER_SIZE];
//Uint16 AdcbResults[RESULTS_BUFFER_SIZE];
//Uint16 AdcdResults[RESULTS_BUFFER_SIZE];
Uint16 resultsIndex;
Uint16 resultsIndex1;
//Uint16 LoopCount; // from sci example
volatile Uint16 bufferFull;
volatile Uint16 bufferFull1;
char sprintf_msg[5];
int z;
char *msg;
void main(void)
{
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xD_SysCtrl.c file.
//
InitSysCtrl();
//
// Step 2. Initialize GPIO:
// This example function is found in the F2837xD_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
//
InitGpio(); // Skipped for this example
//
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
//
DINT;
//
// Initialize the 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 F2837xD_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 F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
//
InitPieVectTable();
//
// Map ISR functions
//
EALLOW;
PieVectTable.ADCA1_INT = &adca1_isr; //function for ADCA interrupt 1
// PieVectTable.ADCB1_INT = &adcb1_isr; //function for ADCB interrupt 1
// PieVectTable.ADCD1_INT = &adcd1_isr; //function for ADCD interrupt 1
EDIS;
//
// Configure the ADC and power it up
//
ConfigureADC();
//
// Configure the ePWM
//
ConfigureEPWM();
//
// Setup the ADC for ePWM triggered conversions on channel 0
//
SetupADCEpwm(0);
//
// Enable global Interrupts and higher priority real-time debug events:
//
IER |= M_INT1; //Enable group 1 interrupts
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
//
// Initialize results buffer
//
for(resultsIndex = 0; resultsIndex < RESULTS_BUFFER_SIZE; resultsIndex++)
{
AdcaResults[resultsIndex] = 0;
// AdcbResults[resultsIndex] = 0;
// AdcdResults[resultsIndex] = 0;
// sprintf(sprintf_msg,"%d",AdcaResults[resultsIndex]);
// scia_msg(sprintf_msg);
}
resultsIndex = 0;
bufferFull = 0;
for(resultsIndex1 = 0; resultsIndex1 < RESULTS_BUFFER_SIZE; resultsIndex1++)
{
AdcaResults1[resultsIndex1] = 0;
// AdcbResults[resultsIndex] = 0;
// AdcdResults[resultsIndex] = 0;
// sprintf(sprintf_msg,"%d",AdcaResults[resultsIndex]);
// scia_msg(sprintf_msg);
}
resultsIndex1 = 0;
bufferFull1 = 0;
//
// enable PIE interrupt
//
PieCtrlRegs.PIEIER1.bit.INTx1 = 1;
// PieCtrlRegs.PIEIER1.bit.INTx2 = 1;
// PieCtrlRegs.PIEIER1.bit.INTx6 = 1;
//
// For this example, only init the pins for the SCI-A port.
// GPIO_SetupPinMux() - Sets the GPxMUX1/2 and GPyMUX1/2 register bits
// GPIO_SetupPinOptions() - Sets the direction and configuration of the GPIOS
// These functions are found in the F2837xD_Gpio.c file.
//
GPIO_SetupPinMux(28, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(28, GPIO_INPUT, GPIO_PUSHPULL);
GPIO_SetupPinMux(29, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(29, GPIO_OUTPUT, GPIO_ASYNC);
scia_fifo_init(); // Initialize the SCI FIFO
scia_echoback_init(); // Initialize SCI for echoback
msg = "\r\n\n\nHello World!\n\0";
scia_msg(msg);
int values[5] = {'1', '2', '2', '5', '6'}; // I added lines 185 - 192
for (z=0; z<5 ;z++) {
int num = values[z];
scia_xmit(num);
}
msg = "\r\nYou will enter a character, and the DSP will echo it back! \n\0";
scia_msg(msg);
//
// sync ePWM
//
EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1;
//
//take conversions indefinitely in loop
//
do
{
//
//start ePWM
//
EPwm1Regs.ETSEL.bit.SOCAEN = 1; //enable SOCA
EPwm1Regs.TBCTL.bit.CTRMODE = 0; //unfreeze, and enter up count mode
//
//wait while ePWM causes ADC conversions, which then cause interrupts,
//which fill the results buffer, eventually setting the bufferFull
//flag
//
while(!bufferFull);
bufferFull = 0; //clear the buffer full flag
while(!bufferFull1);
bufferFull = 0; //clear the buffer full flag
//
//stop ePWM
//
EPwm1Regs.ETSEL.bit.SOCAEN = 0; //disable SOCA
EPwm1Regs.TBCTL.bit.CTRMODE = 3; //freeze counter
//
//at this point, AdcaResults[] contains a sequence of conversions
//from the selected channel
//
sprintf(sprintf_msg,"%d",AdcaResults);
scia_msg(sprintf_msg);
msg = "\r\n\n\nConversion finished!\n\0";
scia_msg(msg);
//
//software breakpoint, hit run again to get updated conversions
//
asm(" ESTOP0");
//InitSci(AdcaResults);
}while(1);
}
//
// ConfigureADC - Write ADC configurations and power up the ADC for both
// ADC A and ADC B
//
void ConfigureADC(void)
{
EALLOW;
//
//write configurations
//
AdcaRegs.ADCCTL2.bit.PRESCALE = 6; //set ADCCLK divider to /4
AdcSetMode(ADC_ADCA, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
//
//Set pulse positions to late
//
AdcaRegs.ADCCTL1.bit.INTPULSEPOS = 1;
//
//power up the ADC
//
AdcaRegs.ADCCTL1.bit.ADCPWDNZ = 1;
//
//delay for 1ms to allow ADC time to power up
//
DELAY_US(1000);
EDIS;
}
//
// ConfigureEPWM - Configure EPWM SOC and compare values
//
void ConfigureEPWM(void)
{
EALLOW;
// Assumes ePWM clock is already enabled
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 0x0800; // Set compare A value to 2048 counts, it was 0x0800
EPwm1Regs.TBPRD = 0x1000; // Set period to 4096 counts, it was 0x1000
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // freeze counter
EDIS;
}
//
// SetupADCEpwm - Setup ADC EPWM acquisition window
//
void SetupADCEpwm(Uint16 channel)
{
Uint16 acqps;
//
//determine minimum acquisition window (in SYSCLKS) based on resolution
//
if(ADC_RESOLUTION_12BIT == AdcaRegs.ADCCTL2.bit.RESOLUTION)
{
acqps = 14; //75ns
}
else //resolution is 16-bit
{
acqps = 63; //320ns
}
//
//Select the channels to convert and end of conversion flag
//
EALLOW;
AdcaRegs.ADCSOC0CTL.bit.CHSEL = channel; //SOC0 will convert pin A0
AdcaRegs.ADCSOC0CTL.bit.ACQPS = acqps; //sample window is 100 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; //trigger on ePWM1 SOCA/C
AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 0; //end of SOC0 will set INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1; //enable INT1 flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //make sure INT1 flag is cleared
EDIS;
}
//
// adca1_isr - Read ADC Buffer in ISR
//
interrupt void adca1_isr(void)
{
AdcaResults[resultsIndex++] =AdcaResultRegs.ADCRESULT0 / 500;
if(RESULTS_BUFFER_SIZE <= resultsIndex)
{
resultsIndex = 0;
bufferFull = 1;
// InitSci(AdcaResults);
}
//sprintf(sprintf_msg,"%d",AdcaResults);
// msg = "\r\n\n\nHello Hayder!\n\0";
//scia_msg(sprintf_msg);
AdcaResults1[resultsIndex1++] = (float32) AdcaResultRegs.ADCRESULT0 * (float32)(3/1096);
if(RESULTS_BUFFER_SIZE <= resultsIndex1)
{
resultsIndex1 = 0;
bufferFull1 = 1;
}
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //clear INT1 flag
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
//
// scia_echoback_init - Test 1,SCIA DLB, 8-bit word, baud rate 0x000F,
// default, 1 STOP bit, no parity
//
void scia_echoback_init()
{
//
// Note: Clocks were turned on to the SCIA peripheral
// in the InitSysCtrl() function
//
SciaRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
SciaRegs.SCICTL1.all = 0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.all = 0x0003;
SciaRegs.SCICTL2.bit.TXINTENA = 1;
SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
//
// SCIA at 9600 baud
// @LSPCLK = 50 MHz (200 MHz SYSCLK) HBAUD = 0x02 and LBAUD = 0x8B.
// @LSPCLK = 30 MHz (120 MHz SYSCLK) HBAUD = 0x01 and LBAUD = 0x86.
//
SciaRegs.SCIHBAUD.all = 0x0002;
SciaRegs.SCILBAUD.all = 0x008B;
SciaRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
}
//
// scia_xmit - Transmit a character from the SCI
//
void scia_xmit(int a)
{
while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}
SciaRegs.SCITXBUF.all =a;
}
//
// scia_msg - Transmit message via SCIA
//
void scia_msg(char * msg)
{
int i;
i = 0;
while(msg[i] != '\0')
{
scia_xmit(msg[i]);
i++;
}
}
// scia_fifo_init - Initialize the SCI FIFO
//
void scia_fifo_init()
{
SciaRegs.SCIFFTX.all = 0xE040;
SciaRegs.SCIFFRX.all = 0x2044;
SciaRegs.SCIFFCT.all = 0x0;
}
