Cytron Technical Forum

by **PICTRAIL** » Thu Jan 27, 2011 10:17 am

Hi, i bought PR29 prototype board from cytron last year november and i downloaded the sample code from online which worked perfectly until december. Early this year i formated my PC after which i needed to install new MPLAB, PIC2KIT and Hitech C Compiler. Again i downloaded same sample source code from http://www.cytron.com.my/viewProduct.ph ... !!!In9pIY= to test my device. The problem now is that my LCD is powered but i can't see any message whereas it works on simulation with RealPic.

Is anyone going through same problem? What be the likely solution... Somebody kindly help.

Regards,
Ebby.

by **ABSF** » Thu Jan 27, 2011 11:05 am

PICTRAIL WROTE:i bought PR29 prototype board from cytron last year november and i downloaded the sample code from online which worked perfectly until december.

Early this year i formated my PC after which i needed to install new MPLAB, PIC2KIT and Hitech C Compiler. Again i downloaded same sample source code to test my device. The problem now is that my LCD is powered but i can't see any message whereas it works on simulation with RealPic.

Regards,
Ebby.

OK, PR29 is a fingerprint attendance system using '876A, right?

What problem did you face in December, when it was not working properly?

What did you see on the LCD early this year after you loaded in the program? A flashing cursor or dark rectangles?

What do you mean by "works on simlation with RealPic"? Is "RealPic" some kind of PIC simulation program?

Allen

by **PICTRAIL** » Thu Jan 27, 2011 9:31 pm

Hi Allen,
Yes! PR29 is a fingerprint attendance system.
In december there was no problem the device worked perfectly. I was able to see message on LCD.
After reinstalling MPLAB and PIC2KIT this year, i can only see dark rectangles on the first row of the 2x16 LCD.
I meant when i run software simulation to check the code, i use a software called "REALPIC" to check if there is error with my hex file but it works well and perform according to my program.
The main error now is that if i load same hex file into my program, i will only see dark rectangle. I tried with 2 different PIC.

Thanks for your anticipated assistance.

Ebby.

by **ABSF** » Fri Jan 28, 2011 12:13 am

After reinstalling MPLAB and PIC2KIT this year, i can only see dark rectangles on the first row of the 2x16 LCD.

Since I dont have any experience using PR#29. I will base my trouble-shooting using the schematics and the User Manual.

The Fingerprint device is connected to UART, and the PC (GUI) is connected to another UART. With these 2 disconnected, you should be able to get a message on the LCD screen when the power is up, right? Then the message will prompt you to choose either "User Mode" or "Admin Mode". On the schematics, the LCD to PIC connections are straight forward using PB for data and RC4 & RC5 for E and RS.

There are 3 possibilities that would cause no disply on LCD. 1. software code 2. PIC 16F876 3. LCD itself.

Since you have already tested the software using a simulator, you can rule out possibility #1.

Then I would confirm that the PIC is good. To do this I would use the PICKit2 to confirm. Did you program the PIC successfully with the "success message" from the PICKit2 ? If the answer is YES, then what is left is the LCD itself. I would confirm that the contrast preset is good using an ohm meter? I read from one of the thread that a faulty preset of the SK40C could cause problems on the LCD too. If that is still OK, I would suspect that the LCD itself is faulty. Do you have another LCD to confirm?

You can also use another program from SK40C to test the LCD. The program was for 16F877 and it uses RD0-7 for data and RB 4 & 5 for RS and E. So you need to modify it slightly in order to use it to test your LCD.

Whether you have formated the PC or not doesnt afftect much on the working of PR29 as long as your PICKIT2 programmer is working and the original HEX file is OK.

Allen

by **PICTRAIL** » Fri Jan 28, 2011 1:16 pm

Thanks Allen,
I've tried everything you mentioned but the problem still persist. I tried with both PR29 evaluation kit and likewise SK40C only thing i can see is Rectangle Boxes on the first row of my 2x16 LCD. I even tried to adjust the contrast but nothing shows... It's really frustrating.

by **ABSF** » Fri Jan 28, 2011 4:08 pm

You mean that you have changed the LCD?

If the LCD is changed and you still have the same problem. It is highly possible that the continuity between the 10 wires of LCD to the PIC RB and RC4&5 is opened somewhere. May be a dry joint at the PIC socket or at the LCD. I have the some problem with my LCD when I first used it with my SK40C. After I soldered the LCD pins again, the fault was gone.

Allen

by **shiyan** » Fri Jan 28, 2011 10:38 pm

ABSF WROTE:You mean that you have changed the LCD?
If the LCD is changed and you still have the same problem. It is highly possible that the continuity between the 10 wires of LCD to the PIC RB and RC4&5 is opened somewhere. May be a dry joint at the PIC socket or at the LCD. I have the some problem with my LCD when I first used it with my SK40C. After I soldered the LCD pins again, the fault was gone.
Allen

Woh... changed the LCD already and still have problem on getting message? Might be connection problem like allen said. I did it before too. If possible, check the connection using multimeter, use the continuity check, pin by pin, refer to the schematic. Starting from RS, R/W, E, DB7......DB0.

Good luck

by **PICTRAIL** » Sat Jan 29, 2011 12:25 pm

Thank you so much everyone... At last i got it....
The problem was with PIN declaration in MPLAB program. PIN connection on hardware was different from the declared PINs in the program.

My next problem is with GLCD. Can someone tell me the function of ChipSet 1 and ChipSet 2. i dont really understand how i can use it with PIC16F877A.

Program below is for PIC18F452 (Cytron PR21). Please how can i modify this to be used for PIC16F877A.
Thanks for your kind support. I wish you all GONG XI FA CAI.

CODE: SELECT_ALL_CODE: //=========================================================================================== // Author :CYTRON TECHNOLOGIES // Project :DIY Project(PR21-Gaming with Accerlerometer) // Project description :Use PIC18F452 microcontroller together with the ADXL330 // accelerometer to measure the gravity force and DS-LCD-TG12864B-03 // Graphical LCD (GLCD) for display. //=========================================================================================== //=========================================================================================== // Include //=========================================================================================== #include <p18f452.h> //============================================================================================ // Configuration //============================================================================================ #pragma config OSC = HSPLL, OSCS = ON #pragma config PWRT = OFF #pragma config BOR = OFF #pragma config WDT = OFF #pragma config CCP2MUX = OFF #pragma config LVP = OFF //configuration for the microcontroller //=========================================================================================== // Define //============================================================================================ #define lcd_data LATD //LCD 8-bit data PORT #define rst LATCbits.LATC4 #define rs LATCbits.LATC5 //RS pin of the LCD display #define rw LATCbits.LATC6 //R/W pin of the LCD display #define e LATCbits.LATC7 //E pin of the LCD display #define psb LATCbits.LATC3 #define b_light LATCbits.LATC2 //backlight of the LCD display (1 to on backlight) #define buzzer LATCbits.LATC0 //buzzer (1 to on buzzer) #define sw1 PORTBbits.RB0 //button (active low) #define sw2 PORTBbits.RB1 //button (active low) #define z_axis PORTAbits.RA0 #define y_axis PORTAbits.RA1 #define x_axis PORTAbits.RA2 #define preset PORTAbits.RA4 #define st LATBbits.LATB2 #define channel0 0b10000001 // Configuration for read ADC channel 0 (RA0) #define channel1 0b10001001 // Configuration for read ADC channel 1 (RA1) #define channel2 0b10010001 // Configuration for read ADC channel 2 (RA2) //============================================================================================== // variable //============================================================================================== int xaxis ,yaxis, zaxis,p; int x_off,y_off,z_off; char d_data, d_data1; char p_x,p_y; unsigned int sens = 500; signed long x_velo=0,y_velo=0,x_dis=0,y_dis=0,last_x=0,last_y=0; char test[] = {"testing0"}; char cali [] = {" CALIBRATE... 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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 } }; //===================================================================================== //Icon graphic data //===================================================================================== rom char icon [8] = { 0x00,0x18,0x3C,0x7E,0x7E,0x3C,0x18,0x00}; //===================================================================================== // function prototype (every function must have a function prototype) //===================================================================================== void init(void); void delay(unsigned long data); void send_config(unsigned char data); void lcd_read(char x, char y); void send_char(unsigned char data); void lcd_goto(unsigned char data); void lcd_clr(void); void send_string(const char *s); void lcd_xy(unsigned char x,unsigned char y); void d_graphic(char k); void clr_graphic(void); void d_icon(int x,int y); void freespace(void); void friction(void); void box(void); void calibrate(void); unsigned int read_adc(char config); //================================================================================== // main function (main fucntion of the program) //=================================================================================== void main(void) { //assign variable unsigned char i=0,database; unsigned char data[10]; unsigned int m,j; init(); d_graphic(0); //display cytron logo delay(300000); //delay for pic display // display claibrating messages send_config(0b00110000); //set to function set configuration lcd_clr(); //clear the lcd send_string(cali); //display string lcd_goto (8); //cursor at 3rd character line send_string(mssg1); //display string mssg1 lcd_goto(24); //cursor at 4th character line send_string(mssg2); //display string mssg2 while(sw1); //wait for button pushed while(!sw1); //wait for button release calibrate(); //taking the current force as reference for flat plane lcd_clr(); //clear the lcd lcd_goto(1); //cursor at 3rd character, 1st character line send_string(mssg3); //display string mssg3 lcd_goto(17); //cursor at 3rd character, 2st character line send_string(mssg4); //display string mssg4 lcd_goto(0); //cursor at 1st character, 1st character line send_char(0x10); //display symbol arrow m =0 ; //set the variable 0 while(1) //loop forever { if (!sw1) //if sw1 is pressed, increase mode { while(!sw1); //wait until sw1 is release m++; //increament m if (m>1) m=0; //if m more than 1 , clear m if (m==1) //if m is 1 { lcd_goto(0); //cursor at 1st line send_char(' '); //space 1st and 2nd character , 1st line lcd_goto(16); //cursor at 2nd line send_char(0x10); //display arrow at 2nd charater, 2nd line } else { lcd_goto(0); //cursor at 1st line send_char(0x10); //display arrow at 2nd charater, 1st line lcd_goto(16); //cursor at 2nd line send_char(' '); //space 1st and 2nd character , 2nd line } } else if (!sw2) //if sw is pressed { while(!sw2); //wait until sw2 is released lcd_clr(); //clear all character clr_graphic(); //clear all graphic // 16 bit timer initial status and start timer TMR0H = 194; // value for timer reach overflow in 50 ms for clock 10MIPS TMR0L = 246; T0CONbits.TMR0ON = 1; //start timer while(1) //loop forever { if (INTCONbits.TMR0IF==1) //if timer over flow ( occur every 50 ms) // to update data every 50 ms { INTCONbits.TMR0IF==0; //clear the flag bit TMR0H=194; //value for timer reach overflow in 50 ms for clock 10MIPS TMR0L=246; if (m==1) friction(); //if mode is 1 , the do calculation friction, else do calculation freespace. else freespace(); //update the data ( required for more accurate intergration ( faster, more accurate )) i++; //increment variable i } if (i==10) //if i reach ten ( around 500 ms) update the icon position { if((x_dis/sens >60)||(x_dis/sens<-60)||(y_dis/sens>28)||(y_dis/sens<-28)) //if the icon position not in range of glcd { //mean 'the ball drop out from glcd' d_graphic(1); //display graphic delay(300000); //dealy for display the graphic d_graphic(2); //display another graphic delay(300000); while(1); } d_icon(60-(x_dis/sens),28+(y_dis/sens)); //display icon at updated x,y position i=0; //clear the variable i } } } } } //============================================================================== //initialization //=============================================================================================================================== void init() { //set I/O input output TRISD = 0b00000000; //configure PORTB I/O direction TRISC = 0b00000000; //configure PORTC I/O direction TRISB = 0b00000011; TRISA = 0b00111111; //configure PORTA I/O direction // ADC configuration ADCON1 = 0b11000011; //set all portA as Analog Input, right justified //Timer 0 configuration T0CON = 0b00000100; //prescale 1: 32 // setup for pwm //For controlling back light PR2 = 255; T2CON = 0b00000100; //prescale 1: CCP1CON = 0b00001100; //Configuration for pwm CCP2CON = 0b00001100; //configure lcd rst = 0; rst = 1; delay (100000); psb = 1; //basic instruction config send_config(0b00110000); //function set lcd_clr(); //clear display at lcd send_config(0b00000010); //lcd return to home send_config(0b00000110); //entry mode-cursor increase 1 send_config(0b00001100); //display on, cursor off and cursor blink off //set initial condition send_config(0b00110100); //extended function set send_config(0b00000010); send_config(0b00000100); send_config(0b00110000); //function set lcd_clr(); //clear lcd CCPR1L = 50; //set the brightness of the back lcd } // functions //=============================================================================================================================== void beep(void) //short beep function { buzzer=1; //on buzzer delay(10000); //short delay buzzer=0; //off buzzer delay(10000); //short delay } //calculation for freespace //=============================================================================================================================== void freespace(void) { xaxis=read_adc(channel0); //read the force acting on x axis yaxis=read_adc(channel1); //reat the force acting on y axis xaxis-=x_off; //offset with value obtain before game start yaxis-=y_off; //offset with value obtain before game start if (((last_x-xaxis)==1)||((xaxis-last_x)==1)) xaxis=0; //filter noise if (((last_y-yaxis)==1)||((last_y-yaxis)==-1)) yaxis=0; //filter noise x_velo+=xaxis/2; //intergrate the force resultance velocity y_velo+=yaxis/2; //intergrate the force resultance velocity x_dis+=x_velo; //intergrate the velocity resultance distance y_dis+=y_velo; //intergrate the velocity resultance distance } //calculation for constant friction ( //=============================================================================================================================== void friction(void) { xaxis=read_adc(channel0); //read the force acting on x axis yaxis=read_adc(channel1); //reat the force acting on y axis xaxis-=x_off; //offset with value obtain before game start yaxis-=y_off; //offset with value obtain before game start if (((last_x-xaxis)==1)||((xaxis-last_x)==1)) xaxis=0; //filter noise if (((last_y-yaxis)==1)||((last_y-yaxis)==-1)) yaxis=0; //filter noise x_velo+=xaxis/2; //intergrate the force resultance velocity y_velo+=yaxis/2; //intergrate the force resultance velocity if(x_velo>0) x_velo--; //decreace the velocity ( making like having friction force ) else if (x_velo<0) x_velo++; if(y_velo>0) y_velo--; else if (y_velo<0) y_velo++; x_dis += x_velo; //intergrate the velocity resultance distance y_dis += y_velo; //intergrate the velocity resultance distance } // ADC function //=============================================================================================================================== unsigned int read_adc(char config) { unsigned short i; unsigned long result ,result_temp=0; ADCON0 = config; delay(1000); // delay after changing configuration for(i=20;i>0;i-=1) //looping 200 times for getting average value { ADCON0bits.GO = 1; //ADGO is the bit 2 of the ADCON0 register while(ADCON0bits.GO==1); //ADC start, ADGO=0 after finish ADC progress result=ADRESH; result=result<<8; //shift to left for 8 bit result=result|ADRESL; //10 bit result from ADC result_temp+=result; } result = result_temp/20; //getting average value ADCON0bits.ADON = 0; //adc module is shut off return result; } void calibrate(void) { x_off = read_adc(channel0); //read x_axis accelero value and save as offset y_off = read_adc(channel1); //read x_axis accelero value and save as offset z_off = read_adc(channel2); //read x_axis accelero value and save as offset } // LCD function // Config function //=============================================================================================================================== void delay(unsigned long data) //delay function, the delay time { //depend on the given value for( ;data>0;data-=1); } void send_config(unsigned char data) //send lcd configuration { rw=0; //set lcd to write mode rs=0; //set lcd to configuration mode lcd_data=data; //lcd data port = data e=1; //pulse e to confirm the data delay(20); e=0; delay(20); } void send_char(unsigned char data) //send lcd character { rw=0; //set lcd to write mode rs=1; //set lcd to display mode lcd_data=data; //lcd data port = data e=1; //pulse e to confirm the data delay(20); e=0; delay(20); } // char function (make sure is in basic function before use lcd function) //=============================================================================================================================== void lcd_goto(unsigned char data) //set the location of the lcd cursor { send_config(0x80+data); // ----------------------------------------------------- // | |00|01|02|03|04|05|06|07| | //1 location can store 2 character // | |17|18|19|...........|15| | // | |09|10|11|...........|23| | // | |24|.................|31| | // ----------------------------------------------------- } void lcd_clr(void) //clear the lcd { send_config(0x01); delay(600); } void send_string(const char *s) //send a string to display in the lcd { unsigned char i=0; while (s && *s)send_char (*s++); } void function( char data) //1 for extention , 0 for basic * must off graphic before go back basic function { send_config(0x30 |data << 2); } // graphic function ( make sure in extention function before use grapchic funcion ) //=============================================================================================================================== // CGRAM map for GLCD Display // y x (column ) // row | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | // 0 0 |UB |LB | | | | | | | | // 1 1 | | | | | | | | | // 2 2 | | | | | | | | | // 3 3 | | | | | | | | | // ' | | | | | | | | | // ' | | | | | | | | | // ' | | | | | | | | | // 31 31 |_______|___|___|___|___|___|___|___| // | 8 | 9 |10 |11 |12 |13 |14 |15 | // 32 0 |UB |LB | | | | | | | | // 33 1 | | | | | | | | | // 34 2 | | | | | | | | | // 35 3 | | | | | | | | | // ' | | | | | | | | | // ' | | | | | | | | | // ' | | | | | | | | | // 63 31 | | | | | | | | | // UB - upper byte , LB - lower byte // To write an LB, UB must wrote first. // display an icon at position x,y void d_icon(int x,int y) //display first bit of 8x8 icon at x,y position { char i,j; if (p_x%16 <8) //if x position is on upper byte of 16 bit { for (j=0;j<8;j++) //repeat for 8 vertical line { lcd_xy(p_x/16,(p_y+j)%64); //go to the location and y is re-adjust after adding j ( > 64 after adding j ) send_char(0); //send upperbyte with shifting according to the x position send_char(0); //send lowerbyte with shifting according to the x position } } else { for (j=0;j<8;j++) { lcd_xy(p_x/16,(p_y+j)%64); //go to the location and y is re-adjust after adding j ( > 64 after adding j ) send_char (0); //send dummy data to the upperbyte send_char(0); //send lowerbyte data with shifting according to the x position if(p_x/16 == 7) lcd_xy(0,p_y+j); send_char(0); //send upperbyte of the next 'x' with shifting according to the x position } } if (x%16 <8) //if x position is on upper byte of 16 bit { for (j=0;j<8;j++) //repeat for 8 vertical line { lcd_xy(x/16,(y+j)%64); //go to the location and y is re-adjust after adding j ( > 64 after adding j ) send_char(icon[j]>> x%8); //send upperbyte with shifting according to the x position send_char(icon[j]<< (8-x%8)); //send lowerbyte with shifting according to the x position } } else { for (j=0;j<8;j++) { lcd_xy(x/16,(y+j)%64); //go to the location and y is re-adjust after adding j ( > 64 after adding j ) send_char (0); //send dummy data to the upperbyte send_char(icon[j]>> x%8); //send lowerbyte data with shifting according to the x position if(x/16 == 7) lcd_xy(0,y+j); send_char(icon[j]<< (8-x%8)); //send upperbyte of the next 'x' with shifting according to the x position } } p_x = x; //save as previous location p_y= y; //save as previous location } void lcd_xy(unsigned char x,unsigned char y) //set the xy position for graphic { if( y >= 32) { //if vertical more or equal 32 send_config(0x80+y-32); //adjust the vertical line send_config(0x80+x+8); //for more detail refer GDRAM in user manual } else { send_config(0x80+y); //vertical (Y) max 63 send_config(0x80+x); //horizontal (X) max 8 (horizontal is divided by 16 bit data (represented in 2 bytes)) } } // display the picture according to the data array defined //=============================================================================================================================== void d_graphic(char k) { unsigned int i,j,y; send_config(0b00111100); //set to extention mode nad graphic off y = 0b10000000; //set y as vertical configuration for(j = 0; j <32 ; j++) //32 line { send_config(y++); //increase line send_config(0b10000000); //set add back to 0 for(i=0;i<16;i++)send_char(graphic[k][i+j*16]); //display first half for(i=0;i<16;i++)send_char(graphic[k][i+512+j*16]); //display second half **since the x add is increased more than 7. See CGRAM map above or refer user manual for CGRAM map for more detail. } send_config(0b00111110); //set to extention mode and graphic on } // clear all the graphic //=============================================================================================================================== void clr_graphic() { unsigned int i,j,y; send_config (0b00111100); //set to extention mode and graphic off y = 0b10000000; //set y as vertical configuration for(j = 0; j <32 ; j++) //32 line { send_config(y++); //increase line send_config(0b10000000); //set add back to 0 for(i=0;i<32;i++)send_char(0); //clear all } send_config(0b00111110); //set to extention mode and graphic on }

by **ABSF** » Sun Jan 30, 2011 8:34 am

My next problem is with GLCD. Can someone tell me the function of ChipSet 1 and ChipSet 2. i dont really understand how i can use it with PIC16F877A.

What ChipSet 1 & 2 are you refering to? I can't find them in the C codes and the schematics of PR21.
A little more explanation is needed.

Allen

by **Brian Griffin** » Sun Jan 30, 2011 11:56 am

If I'm not mistaken, the "Chipset 1" and "Chipset 2" refers to the halves of the screen. You must know that the casual KS0108 have 8 x (8 rows * 64 pixels) on the left, and the same one on the right side of the screen.

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