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M.Yasser
Joined: 26 Jul 2011
Posts: 9
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| Driving Nokia3310 Lcd |
 Posted: Fri Aug 05, 2011 4:08 pm |
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Hi,
I’m trying to write a string on Nokia3310 Lcd with no success.
I’m using CCS C under MPLAB v8.73. The microcontroller I’m using is 16f877A.
As you can see in the figure I’m using proteus to simulate the circuit. The driving code for the lcd is by Michel Bavin.
The Lcd library is :
| Code: | ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/*
Graphic LCD Nokia 3310 (LPH7779) routines v3
CCS compiler
by Michel Bavin 2004 --- [email protected] --- http://users.skynet.be/bk317494/ ---
august 29, 2004
*/
//driver library name:nokia_3310.c
// ex:
//
// ...
// nokia_init();
// ...
// nokia_gotoxy(0,0);
// printf(nokia_printchar,"test???");
// ...
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define nok_sclk PIN_D4
#define nok_sda PIN_D3
#define nok_dc PIN_D2
#define nok_cs PIN_D1
#define nok_res PIN_D0
char char_row,charsel,charpos,chardata; // for nokia_3310 lcd
int16 ddram;
char plot_value;
int32 plot_value32;
int32 plot_umsb,plot_lmsb,plot_ulsb,plot_llsb;
BYTE const TABLE5[240]= {0x00,0x00,0x00,0x00,0x00, // 20 space ASCII table for NOKIA LCD: 96 rows * 5 bytes= 480 bytes
0x00,0x00,0x5f,0x00,0x00, // 21 !
0x00,0x07,0x00,0x07,0x00, // 22 "
0x14,0x7f,0x14,0x7f,0x14, // 23 #
0x24,0x2a,0x7f,0x2a,0x12, // 24 $
0x23,0x13,0x08,0x64,0x62, // 25 %
0x36,0x49,0x55,0x22,0x50, // 26 &
0x00,0x05,0x03,0x00,0x00, // 27 '
0x00,0x1c,0x22,0x41,0x00, // 28 (
0x00,0x41,0x22,0x1c,0x00, // 29 )
0x14,0x08,0x3e,0x08,0x14, // 2a *
0x08,0x08,0x3e,0x08,0x08, // 2b +
0x00,0x50,0x30,0x00,0x00, // 2c ,
0x08,0x08,0x08,0x08,0x08, // 2d -
0x00,0x60,0x60,0x00,0x00, // 2e .
0x20,0x10,0x08,0x04,0x02, // 2f /
0x3e,0x51,0x49,0x45,0x3e, // 30 0
0x00,0x42,0x7f,0x40,0x00, // 31 1
0x42,0x61,0x51,0x49,0x46, // 32 2
0x21,0x41,0x45,0x4b,0x31, // 33 3
0x18,0x14,0x12,0x7f,0x10, // 34 4
0x27,0x45,0x45,0x45,0x39, // 35 5
0x3c,0x4a,0x49,0x49,0x30, // 36 6
0x01,0x71,0x09,0x05,0x03, // 37 7
0x36,0x49,0x49,0x49,0x36, // 38 8
0x06,0x49,0x49,0x29,0x1e, // 39 9
0x00,0x36,0x36,0x00,0x00, // 3a :
0x00,0x56,0x36,0x00,0x00, // 3b ;
0x08,0x14,0x22,0x41,0x00, // 3c <
0x14,0x14,0x14,0x14,0x14, // 3d =
0x00,0x41,0x22,0x14,0x08, // 3e >
0x02,0x01,0x51,0x09,0x06, // 3f ?
0x32,0x49,0x79,0x41,0x3e, // 40 @
0x7e,0x11,0x11,0x11,0x7e, // 41 A
0x7f,0x49,0x49,0x49,0x36, // 42 B
0x3e,0x41,0x41,0x41,0x22, // 43 C
0x7f,0x41,0x41,0x22,0x1c, // 44 D
0x7f,0x49,0x49,0x49,0x41, // 45 E
0x7f,0x09,0x09,0x09,0x01, // 46 F
0x3e,0x41,0x49,0x49,0x7a, // 47 G
0x7f,0x08,0x08,0x08,0x7f, // 48 H
0x00,0x41,0x7f,0x41,0x00, // 49 I
0x20,0x40,0x41,0x3f,0x01, // 4a J
0x7f,0x08,0x14,0x22,0x41, // 4b K
0x7f,0x40,0x40,0x40,0x40, // 4c L
0x7f,0x02,0x0c,0x02,0x7f, // 4d M
0x7f,0x04,0x08,0x10,0x7f, // 4e N
0x3e,0x41,0x41,0x41,0x3e // 4f O
};
BYTE const TABLE6[240]= {0x7f,0x09,0x09,0x09,0x06, // 50 P
0x3e,0x41,0x51,0x21,0x5e, // 51 Q
0x7f,0x09,0x19,0x29,0x46, // 52 R
0x46,0x49,0x49,0x49,0x31, // 53 S
0x01,0x01,0x7f,0x01,0x01, // 54 T
0x3f,0x40,0x40,0x40,0x3f, // 55 U
0x1f,0x20,0x40,0x20,0x1f, // 56 V
0x3f,0x40,0x38,0x40,0x3f, // 57 W
0x63,0x14,0x08,0x14,0x63, // 58 X
0x07,0x08,0x70,0x08,0x07, // 59 Y
0x61,0x51,0x49,0x45,0x43, // 5a Z
0x00,0x7f,0x41,0x41,0x00, // 5b [
0x02,0x04,0x08,0x10,0x20, // 5c
0x00,0x41,0x41,0x7f,0x00, // 5d
0x04,0x02,0x01,0x02,0x04, // 5e
0x40,0x40,0x40,0x40,0x40, // 5f
0x00,0x01,0x02,0x04,0x00, // 60
0x20,0x54,0x54,0x54,0x78, // 61 a
0x7f,0x48,0x44,0x44,0x38, // 62 b
0x38,0x44,0x44,0x44,0x20, // 63 c
0x38,0x44,0x44,0x48,0x7f, // 64 d
0x38,0x54,0x54,0x54,0x18, // 65 e
0x08,0x7e,0x09,0x01,0x02, // 66 f
0x0c,0x52,0x52,0x52,0x3e, // 67 g
0x7f,0x08,0x04,0x04,0x78, // 68 h
0x00,0x44,0x7d,0x40,0x00, // 69 i
0x20,0x40,0x44,0x3d,0x00, // 6a j
0x7f,0x10,0x28,0x44,0x00, // 6b k
0x00,0x41,0x7f,0x40,0x00, // 6c l
0x7c,0x04,0x18,0x04,0x78, // 6d m
0x7c,0x08,0x04,0x04,0x78, // 6e n
0x38,0x44,0x44,0x44,0x38, // 6f o
0x7c,0x14,0x14,0x14,0x08, // 70 p
0x08,0x14,0x14,0x18,0x7c, // 71 q
0x7c,0x08,0x04,0x04,0x08, // 72 r
0x48,0x54,0x54,0x54,0x20, // 73 s
0x04,0x3f,0x44,0x40,0x20, // 74 t
0x3c,0x40,0x40,0x20,0x7c, // 75 u
0x1c,0x20,0x40,0x20,0x1c, // 76 v
0x3c,0x40,0x30,0x40,0x3c, // 77 w
0x44,0x28,0x10,0x28,0x44, // 78 x
0x0c,0x50,0x50,0x50,0x3c, // 79 y
0x44,0x64,0x54,0x4c,0x44, // 7a z
0x00,0x08,0x36,0x41,0x00, // 7b
0x00,0x00,0x7f,0x00,0x00, // 7c
0x00,0x41,0x36,0x08,0x00, // 7d
0x10,0x08,0x08,0x10,0x08, // 7e
0x78,0x46,0x41,0x46,0x78 // 7f
};
//
void nokia_init(void);
void nokia_write_command(char bytefornokia_command);
void nokia_write_data(char bytefornokia_data);
void nokia_write_dorc(char bytefornokia);
void nokia_gotoxy(int8 xnokia, int8 ynokia);
void nokia_erase_y(int8 ynokia);
void nokia_erase_x(int8 xnokia);
void nokia_printchar(int8 cvar);
void nokia_clean_ddram(void);
void table_to_nokialcd(void);
void nokia_plot(int8 xnokia,int8 plot_value8);
void nokia_write_data_inv(char bytefornokia_data_inv);
void nokia_clear_screen(void);
void nokia_clear_xy(int8 xnokia, int8 ynokia);
void nokia_print_uparrow(void);
void nokia_print_downarrow(void);
void nokia_print_leftarrow(void);
void nokia_print_rightarrow(void);
void nokia_print_degree(void);
void nokia_print_lowbatdegree(void);
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_init(void)
{
output_high(nok_dc); // bytes are stored in the display data ram, address counter, incremented automatically
output_high(nok_cs); // chip disabled
output_low(nok_res); // reset chip during 250ms
delay_ms(10); // works with less.....
output_high(nok_res);
nokia_write_command(0x21); // set extins extended instruction set
nokia_write_command(0xc2); // Vop v1: 0xc8 (for 3V)// v2: 0xa0 (for 3V) // v3: 0xc2 (2v6-5v) ********************************************************************************************************************
nokia_write_command(0x13); // bias
nokia_write_command(0x20); // horizontal mode from left to right, X axe are incremented automatically , 0x22 for vertical addressing ,back on normal instruction set too
nokia_write_command(0x09); // all on
nokia_clean_ddram(); // reset DDRAM, otherwise the lcd is blurred with random pixels
nokia_write_command(0x08); // mod control blank change (all off)
nokia_write_command(0x0c); // mod control normal change
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_clean_ddram(void)
{
nokia_gotoxy(0,0); // 84*6=504 clear LCD
for (ddram=504;ddram>0;ddram--){nokia_write_data(0x00);}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_write_command(char bytefornokia_command)
{
output_low(nok_dc); // byte is a command it is read with the eight SCLK pulse
output_low(nok_cs); // chip enabled
nokia_write_dorc(bytefornokia_command);
output_high(nok_cs); // chip disabled
}
/////////////////////////////////////////////////////////////////////////////////
void nokia_write_data(char bytefornokia_data)
{
output_high(nok_dc);
output_low(nok_cs); // chip enabled
nokia_write_dorc(bytefornokia_data);
output_high(nok_cs); // chip disabled
}
//////////////////////////////////////////////////////////////////////////////////
void nokia_write_dorc(char bytefornokia) // serial write data or command subroutine
{
char caa;
for (caa=8;caa>0;caa--) {
output_low(nok_sclk);
// delay_us(2);
if ((bytefornokia&0x80)==0){output_low(nok_sda);}
else {output_high(nok_sda);}
output_high(nok_sclk);
bytefornokia=bytefornokia<<1;
}
}
//////////////////////////////////////////////////////////////////////////////////
void nokia_gotoxy(int8 xnokia, int8 ynokia) // Nokia LCD 3310 Position cursor
{
nokia_write_command(0x40|(ynokia&0x07)); // Y axe initialisation: 0100 0yyy
nokia_write_command(0x80|(xnokia&0x7f)); // X axe initialisation: 1xxx xxxx
}
//////////////////////////////////////////////////////////////////////////////////
void nokia_erase_y(int8 ynokia)
{
nokia_gotoxy(0,ynokia);
printf(nokia_printchar," ");
}
//////////////////////////////////////////////////////////////////////////////////
void nokia_erase_x(int8 xnokia)
{
char column;
for (column=0;column!=6;column++){
nokia_gotoxy(xnokia,column);
nokia_write_data(0x00);
nokia_write_data(0x00);
nokia_write_data(0x00);
nokia_write_data(0x00);
nokia_write_data(0x00);
nokia_write_data(0x00);
}
}
//////////////////////////////////////////////////////////////////////////////////
void nokia_printchar(int8 cvar) // Write 1 character to LCD
{
charsel=cvar;
table_to_nokialcd();
}
//////////////////////////////////////////////////////////////////////////////////
void table_to_nokialcd(void) // extract ascii from tables & write to LCD
{
if (charsel<0x20)return;
if (charsel>0x7f)return;
for (char_row=0;char_row<5;char_row++) { // 5 bytes
if (charsel<0x50){charpos=(((charsel&0xff)-0x20)*5);chardata=TABLE5[(charpos+char_row)];} // use TABLE5
else if (charsel>0x4f){charpos=(((charsel&0xff)-0x50)*5);chardata=TABLE6[(charpos+char_row)];} // use TABLE6
nokia_write_data(chardata); // send data to nokia
}
nokia_write_data(0x00); // 1 byte (always blank)
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_plot(int8 xnokia,int8 plot_value8)
{
char i;
plot_value32=0;
// plot_value32|=1; // unremark this if you want dotgraph instead of bargraph
for (i=0;i!=plot_value8;i++){
plot_value32|=1; // remark this if you want dotgraph instead of bargraph
plot_value32<<=1;
}
plot_value32|=2; // bottom line is always filled
plot_llsb=(plot_value32&0xff);
plot_ulsb=((plot_value32>>8)&0xff);
plot_lmsb=((plot_value32>>16)&0xff);
plot_umsb=((plot_value32>>24)&0xff);
nokia_gotoxy(xnokia,1);
nokia_write_data_inv(plot_umsb);
nokia_gotoxy(xnokia,2);
nokia_write_data_inv(plot_lmsb);
nokia_gotoxy(xnokia,3);
nokia_write_data_inv(plot_ulsb);
nokia_gotoxy(xnokia,4);
nokia_write_data_inv(plot_llsb);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_write_data_inv(char bytefornokia_data_inv)
{
char caa;
output_high(nok_dc);
output_low(nok_cs); // chip enabled
for (caa=8;caa>0;caa--) {
output_low(nok_sclk);
delay_us(2);
if ((bytefornokia_data_inv&0x01)==0){output_low(nok_sda);}
else {output_high(nok_sda);}
output_high(nok_sclk);
bytefornokia_data_inv=bytefornokia_data_inv>>1;
}
output_high(nok_cs); // chip disabled
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_clear_screen(void)
{
nokia_erase_y(0);
nokia_erase_y(1);
nokia_erase_y(2);
nokia_erase_y(3);
nokia_erase_y(4);
nokia_erase_y(5);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_clear_xy(int8 xnokia, int8 ynokia)
{
nokia_gotoxy(xnokia,ynokia);
nokia_printchar(" ");
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void nokia_print_uparrow(void)
{
nokia_write_data(0x04);
nokia_write_data(0x02);
nokia_write_data(0x7f);
nokia_write_data(0x02);
nokia_write_data(0x04);
nokia_write_data(0x00);
}
//
void nokia_print_downarrow(void)
{
nokia_write_data(0x10);
nokia_write_data(0x20);
nokia_write_data(0x7f);
nokia_write_data(0x20);
nokia_write_data(0x10);
nokia_write_data(0x00);
}
//
void nokia_print_leftarrow(void)
{
nokia_write_data(0x08);
nokia_write_data(0x1c);
nokia_write_data(0x2a);
nokia_write_data(0x08);
nokia_write_data(0x08);
nokia_write_data(0xf8);
}
//
void nokia_print_rightarrow(void)
{
nokia_write_data(0x08);
nokia_write_data(0x08);
nokia_write_data(0x2a);
nokia_write_data(0x1c);
nokia_write_data(0x08);
nokia_write_data(0x00);
}
//
void nokia_print_degree(void)
{
nokia_write_data(0x00);
nokia_write_data(0x06);
nokia_write_data(0x09);
nokia_write_data(0x09);
nokia_write_data(0x06);
nokia_write_data(0x00);
// nokia_printchar(" ");
}
//
void nokia_print_lowbatdegree(void)
{
nokia_write_data(0x00);
nokia_write_data(0x06);
nokia_write_data(0x0f);
nokia_write_data(0x0f);
nokia_write_data(0x06);
nokia_write_data(0x00);
// nokia_printchar(" ");
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
The test prog i'm writing is:
| Code: | #include "16F877A.h"
#use delay(clock=8000000)
#include "nokia_3310.c"
void main()
{
NOKIA_INIT();
NOKIA_GOTOXY(1,1);
printf(nokia_printchar,"M.Yasser");
NOKIA_GOTOXY(20,10);
PRINTF(NOKIA_PRINTCHAR,"A Test!!");
printF(nokia_printchar,"NOKIA 3310 LCD");
while(1); |
The Lcd display's nothing (blank).
Can anybody tell me what is wrong please?
Regards. |
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temtronic
Joined: 01 Jul 2010
Posts: 9244
Location: Greensville,Ontario
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| Posted: Fri Aug 05, 2011 6:26 pm |
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Well the biggest error is in using Proteus ! Simulation is NOT the real world. I may sound like an old record but Proteus is FULL of bugs, errors, faulty drcs...
Unless you can Debug Proteus (the actual code NOT what is generated)you best get some real chips,a breadboard and learn by doing.
If you do that, then you'll very,very quickly learn that the 'schematic' that Proteus allows will NEVER work in the real world.
'Little' details like power supply issues, floating pins,no crystal, no bypass caps....ALL add up to hardware that can never function.
As to the 'driver' code...who says it actually works with your LCD AND your PIC ? Again, several lines come to mind, far too many to list here...
But to start off, you don't have a 'fuses' line after the processor include. |
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M.Yasser
Joined: 26 Jul 2011
Posts: 9
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| Posted: Fri Aug 05, 2011 8:19 pm |
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Hi temtronic,
Thank you for your fast reply. As far as I know fuses should be set in the part when it is programmed and it does not affect the compilation. However the project wizard takes care of the fuses, I think. See the figure below.
| Quote: | | ...then you'll very,very quickly learn that the 'schematic' that Proteus allows will NEVER work in the real world. |
yes, I’m aware of that.
| Quote: | | As to the 'driver' code...who says it actually works with your LCD AND your PIC ? |
I reviewed the code, and it seems that it’s ok, I hope.
| Quote: | | several lines come to mind, far too many to list here... |
I’m learning please try to.
Regards. |
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temtronic
Joined: 01 Jul 2010
Posts: 9244
Location: Greensville,Ontario
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| Posted: Sat Aug 06, 2011 5:07 am |
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Really, fuses should be in your program after the # device. While you can set them with the programmer interface,if written into the PIC program it would be very clear(to others) that you have LowVoltage Programming fuse set.
Having LVP set can cause you a LOT of problems when the PIC is actually programmed and in use.Unless you really have a low voltage programmer(99% aren't) then you should set the option to NOLVP.
I would suggest cutting code for the 'Hello World' test and be sure the PIC and a texttype LCD work fine.That simple program will check out 99% of the hardware,programmer,etc.
Be aware that the 877 is a 5 volt device, the Nokia a 3.3 device so you WILL require logic level translation between the two.proteus , of course, won't tell you this , and if you wire it up according to Proteus you'll destroy the LCD.... |
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M.Yasser
Joined: 26 Jul 2011
Posts: 9
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| Posted: Sat Aug 06, 2011 12:38 pm |
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Hi temtronic,
Your comment was very helpful;
| Quote: | | Be aware that the 877 is a 5 volt device, the Nokia a 3.3 device so you WILL require logic level translation between the two. |
I managed to get it work; I only removed the 3.3v and replaced it with VDD. Since it’s only a simulation the LCD will not be fried. In real circuit I will use 3.3v; the purpose from using simulation for me is to check the correctness of the code.
Warm regards.  |
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temtronic
Joined: 01 Jul 2010
Posts: 9244
Location: Greensville,Ontario
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| Posted: Sat Aug 06, 2011 12:45 pm |
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I'm glad you got it to work, at least as a simulation. As you are now aware Proteus did not allow the LCD Vdd to be 3.3V, so really Proteus fried your simulated LCD !!
Had it been the real world, you would have fried it ($$$$).
The point I'm making is that you cannot trust Proteus to be 100% correct. There are other errors in the schematic that Proteus allows in the simulation that would have stopped the hardware from running properly, so remember just because it 'worked' on the screen doesn't mean it will with real chips !! |
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sresam89
Joined: 15 Mar 2012
Posts: 20
Location: India
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| Posted: Sun Mar 25, 2012 3:58 am |
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| M.Yasser wrote: | Hi temtronic,
Your comment was very helpful;
| Quote: | | Be aware that the 877 is a 5 volt device, the Nokia a 3.3 device so you WILL require logic level translation between the two. |
I managed to get it work; I only removed the 3.3v and replaced it with VDD. Since it’s only a simulation the LCD will not be fried. In real circuit I will use 3.3v; the purpose from using simulation for me is to check the correctness of the code.
Warm regards. |
hello yasser have are you done with this project?
if you have constructed the real hardware how did you manage to get the 3.3 level transistions? or did u just use 5v directly from Uc? |
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sresam89
Joined: 15 Mar 2012
Posts: 20
Location: India
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| un stable contrast |
| Posted: Sun Mar 25, 2012 2:48 pm |
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hello M.Yasser
your code came out well and indeed helpful.
just one problem with my hardware is my contrast is not getting stabilized its gets off upon every reset and takes quite large time to display still full contrast is not achieved. |
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