CCS/TMS320F28377S: SCI ISN'T PROPERLY WORKING

eeddii,

Can please give a description on your problem?

Please make sure to include any screenshots, if any.

Thanks,

Vince Rodriguez

Hi
Yes , of course . SCI-A TXDA is making wrong signal instead of to display ADC.RESULT values as I want . I want to see in LCD monitor voltage sensor values through SCI-A TXDA connection . To do this I used ASCII format . Here the code main is :


/*
* main.c
*
* Created on: 2017. 5. 11.
*
*/

#include "F28x_Project.h"
#include "math.h"
#include "main.h"
#include <string.h>

extern interrupt void adca1_isr(void);
extern void InitEPwm(void);
extern void ConfigureADC(void);
extern void Gpio_setup(void);

extern void InitSci(void);
extern void InitSpi(void);
extern void OUT_Display(void);

extern void Function_Init(void);
extern void Value_Init(void);
extern void Control_filter_Init(void);

extern void FULL_SYSTEM_DISABLE(void);
void Sys_Init(void);

extern void Write_mode(char mode);
extern void GLcd_Clear(char n);
extern void GLcd_Glayer(char n);
extern void GLcd_Cursor_OnOff(char mode);
extern void GLcd_Cursor_mode(char mode);
extern void BL_OnOff(char mode);
extern void GLcd_FontStyle(void);

extern void ValuetoAsii(long value, int digit, int fract, char *str, char zero_fill);
extern void GLcd_Out(char *data, char num);
extern void GLcd_Text_Loc(const char x, const char y);



///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void MemCopy(Uint16 *SourceAddr, Uint16* SourceEndAddr, Uint16* DestAddr)
{
while(SourceAddr < SourceEndAddr)
{
*DestAddr++ = *SourceAddr++;
}
return;
}

void main(void)
{
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xS_SysCtrl.c file.
//
InitSysCtrl();
InitGpio();
DINT;

EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;

InitPieCtrl();

IER = 0x0000;
IFR = 0x0000;

EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;

InitPieVectTable();

DELAY_US(1000);
ConfigureADC();
Sys_Init();

Function_Init();
Value_Init();
Control_filter_Init();

EALLOW;
PieVectTable.ADCA1_INT = &adca1_isr;
EDIS;

PieCtrlRegs.PIEIER1.bit.INTx1 = 1;
PieCtrlRegs.PIEIER9.bit.INTx1 = 1; // PIE Group 9, INT1, SCI RX Interrupt
PieCtrlRegs.PIEIER9.bit.INTx2 = 1; // PIE Group 9, INT2, SCI TX Interrupt

IER |= M_INT1; //Enable group 1 interrupts // EPWM and ADC int...
IER |= M_INT3;

PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
PieCtrlRegs.PIEACK.all = 0xFFFF;

EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM

while (1)
// for (;;)
{
OUT_Display(); // LCD displaying part
}
}

void Sys_Init(void)
{
Gpio_setup();
InitEPwm();
InitSci();
InitSpi();

Write_mode(0);
GLcd_Clear(0);
GLcd_Glayer(2);

GLcd_Cursor_OnOff(0);
GLcd_Cursor_mode(0);
BL_OnOff(1);
}

void InitSci(void)
{
#define USE_SCIA 1
#define USE_SCIB 0
#define USE_SCIC 0
#define USE_SCID 0

#if USE_SCIA
Scia();
Sciagpio();

#endif

#if USE_SCIB
Scib();
#endif

#if USE_SCIC
Scic();
#endif

#if USE_SCID
Scid();
#endif
}

#if USE_SCIA
void Scia(void)
{ SCIA_EN = 2;
// Note: Clocks were turned on to the SCIA peripheral in the InitSysCtrl() function SCICHAR
SciaRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback, No parity,8 char bits, async mode, idle-line protocol
SciaRegs.SCICTL1.all = 0x0003;
SciaRegs.SCICTL2.all = 0x0003;

// SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
// SCIA at 9600 baud
// @LSPCLK = 50 MHz (200 MHz SYSCLK) HBAUD = 0x02 and LBAUD = 0x8B.
SciaRegs.SCIHBAUD.all = 0x02;
SciaRegs.SCILBAUD.all = 0x145;///325 decimal

SciaRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
}
#endif

void Sciagpio(void)
{
GpioCtrlRegs.GPCPUD.bit.GPIO84 = 0; // Enable pullup on GPIO84
GpioCtrlRegs.GPCGMUX2.bit.GPIO84 = 1; // GPIO84 = peripheral out
GpioCtrlRegs.GPCMUX2.bit.GPIO84 = 1; // GPIO84 = SCI TXDA
GpioCtrlRegs.GPCDIR.bit.GPIO84 = 1; // GPIO84 = output

GpioCtrlRegs.GPCPUD.bit.GPIO85 = 0; // Enable pullup on GPIO85
GpioCtrlRegs.GPCGMUX2.bit.GPIO85 = 1; // GPIO85 = SCI RXDA
GpioCtrlRegs.GPCMUX2.bit.GPIO85 = 1; // GPIO84 = SCI RXDA
GpioCtrlRegs.GPCDIR.bit.GPIO85 = 0; // GPIO85 = input
}
} //// END OF MAIN()

//////// THIS IS LCD DISPLAYING PARTS ///////////////////////
#include "F28x_Project.h"
#include "main.h"
#include "math.h"
#include "stdio.h"
#include "string.h"

#pragma CODE_SECTION(OUT_Display, ".TI.ramfunc");

void ValuetoAsii(long value, int digit, int fract, char *str, char zero_fill);
void GLcd_Out(char *data, char num);
void GLcd_Text_Loc(char x, char y);
void OUT_Display(void);



extern int16 AD_RESULT_A[16], AD_RESULT_B[16];
char cValue[10],LCD_LINE_COUNT=0;
Uint16 LCD_MODE = 0, V_dcc_ref = 1542;
int32_t dataOut32;


///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


void OUT_Display(void)
{
switch(LCD_MODE)
{
case 0:
LCD_LINE_COUNT=0;
GLcd_Text_Loc(0, LCD_LINE_COUNT);
GLcd_Out("AD0 :", 6);
ValuetoAsii((long)AD_RESULT_A[0], 4, 0, cValue, 0); // AD_RESULT_A[0] = ADC voltage sensor
GLcd_Out(cValue, 4);

GLcd_Out(" AD1 :", 6);
ValuetoAsii((long)AD_RESULT_A[1], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD2 :", 6);
ValuetoAsii((long)AD_RESULT_A[2], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD3 :", 6);
ValuetoAsii((long)AD_RESULT_A[3], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

// Line2 Display
LCD_LINE_COUNT++;
GLcd_Text_Loc(0, LCD_LINE_COUNT);
GLcd_Out("AD4 :", 6);
ValuetoAsii((long)AD_RESULT_A[4], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD5 :", 6);
ValuetoAsii((long)AD_RESULT_A[5], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD6 :", 6);
ValuetoAsii((long)AD_RESULT_A[6], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD7 :", 6);
ValuetoAsii((long)AD_RESULT_A[7], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

// Line3 Display
LCD_LINE_COUNT++;
GLcd_Text_Loc(0, LCD_LINE_COUNT);
GLcd_Out("AD8 :", 5);
ValuetoAsii((long)AD_RESULT_A[8], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD9 :", 6);
ValuetoAsii((long)AD_RESULT_A[9], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD10:", 6);
ValuetoAsii((long)AD_RESULT_A[10], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);

GLcd_Out(" AD11:", 6);
ValuetoAsii((long)AD_RESULT_A[11], 4, 0, cValue, 0);
GLcd_Out(cValue, 4);
break;
}}

void GLcd_Text_Loc(const char x, const char y)
{ // GLcd_Text_Loc(0, LCD_LINE_COUNT);
char data[5];
data[0] = 0x1B;
data[1] = 0x4C;
data[2] = 0x4F;
data[3] = x; // x 좌표(0 ~ 39)
data[4] = y; // y 좌표(0 ~ 14)
GLcd_Out(data, 5);
}

void GLcd_Out(char *data, char num)
{
char ctemp, i;
for(i=0; i<num; i++){
ctemp = *data++;
SciaRegs.SCITXBUF.all = ctemp;
while(SciaRegs.SCICTL2.bit.TXRDY!= 1) { } // wait for XRDY =1 for empty stateTXDT
}
}
// End of file
//

eeddii,

From looking at the LCD monitor, i do not believe that decimal to ASCII conversion is the only problem.

Here are some debug steps I would perform to see if we can isolate the problem.

1. Check what kind of packet format you need to be sending the LCD monitor. You might need to send more than just the ASCII character.
2. Set a breakpoint inside your ASCII conversion function, and check to make sure you are converting to ASCII correctly.

Let me know how that goes.

Thanks,

Vince Rodriguez

eeddii,

when you set your breakpoint was the value of the the ASCII conversion function the correct value?