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LCD 16x2 Powertip And IR code grabber

 
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Kova



Joined: 06 May 2007
Posts: 35

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LCD 16x2 Powertip And IR code grabber
PostPosted: Mon Aug 24, 2009 11:31 am     Reply with quote
Hi all,

I bought this LCD 16x2: PC1602AR-GSO-A
I read on the Powertip homepage that the display has the ST7066U controller (http://www.powertip.com.tw/products_1.php?area_id=1170985616&area_name=Character%20LCD%20Module).
This site http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7066U says that: "The ST7066U has pin function compatibility with the HD44780, KS0066 and SED1278 that allows the user to easily replace it with an ST7066U"

So, I tested this display with a 18F4550 this is the code:
Code:
#include <18F4550.h>
#device adc=8
#use delay(clock=20000000,RESTART_WDT)
#fuses HS, BROWNOUT, BORV20, PUT, STVREN, NOLVP
#define LCD_ENABLE_PIN  PIN_E0                                    ////
#define LCD_RS_PIN      PIN_E1                                    ////
#define LCD_RW_PIN      PIN_E2                                    ////
#define LCD_DATA4       PIN_D4                                    ////
#define LCD_DATA5       PIN_D5                                    ////
#define LCD_DATA6       PIN_D6                                    ////
#define LCD_DATA7       PIN_D7 
#include "lcd.c"

void main() {
   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_psp(PSP_DISABLED);
   setup_spi(FALSE);
   setup_wdt(WDT_ON);
   setup_timer_0(RTCC_INTERNAL);
   setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
   setup_timer_2(T2_DISABLED,0,1);
   setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
   ext_int_edge(0,H_TO_L);
   enable_interrupts(INT_TIMER1);
   enable_interrupts(INT_EXT);
   enable_interrupts(global);

lcd_init(); //Initialise LCD
delay_ms(10);

lcd_putc("\fHello World\n");
lcd_putc("Line Number 2");

while(1);
}


Nothing happens Crying or Very sad

In Proteus with a LCD Hitachi the code works correctly Confused
I have also tried with this code: http://www.ccsinfo.com/forum/viewtopic.php?t=21290
With:
E0 -->RS
E1 -->Enable
E2 -->RW
Nothing, in Proteus works, on my circuit nope :(

I checked the circuit 100 times, seems ok!
On the RS pin I read 5V like in Proteus Sad

Somebody can help me?
Thanks a lot

Last edited by Kova on Wed Aug 26, 2009 3:22 am; edited 1 time in total
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Aug 24, 2009 11:50 am     Reply with quote
Quote:

enable_interrupts(INT_TIMER1);
enable_interrupts(INT_EXT);
enable_interrupts(global);

You are enabling interrupts without any interrupt routines. This will
cause the program to crash.

Quote:
setup_wdt(WDT_ON);

You are enabling the Watchdog Timer, but you don't have a restart_wdt()
line in your while() loop. This will cause the program to constantly reset.

Quote:
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_wdt(WDT_ON);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
ext_int_edge(0,H_TO_L);
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_EXT);
enable_interrupts(global);

You don't need this code. These modules are all disabled by default
upon power-on reset of the PIC. You don't need to do it again in code.
Delete all of the lines above.
Kova



Joined: 06 May 2007
Posts: 35

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PostPosted: Mon Aug 24, 2009 12:03 pm     Reply with quote
PCM programmer wrote:
You don't need this code. These modules are all disabled by default
upon power-on reset of the PIC. You don't need to do it again in code.
Delete all of the lines above.


Sure sorry, I writed the old code in the new those lines are disabled.
This is the code that I have tested:
Code:

#include <18F4550.h>
#device adc=8
#use delay(clock=20000000,RESTART_WDT)
#fuses HS, BROWNOUT, BORV20, PUT, STVREN, NOLVP
#define LCD_ENABLE_PIN  PIN_E0                                    ////
#define LCD_RS_PIN      PIN_E1                                    ////
#define LCD_RW_PIN      PIN_E2                                    ////
#define LCD_DATA4       PIN_D4                                    ////
#define LCD_DATA5       PIN_D5                                    ////
#define LCD_DATA6       PIN_D6                                    ////
#define LCD_DATA7       PIN_D7 
#include "lcd.c"

void main() {
   /*setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_psp(PSP_DISABLED);
   setup_spi(FALSE);
   setup_wdt(WDT_ON);
   setup_timer_0(RTCC_INTERNAL);
   setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
   setup_timer_2(T2_DISABLED,0,1);
   setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
   ext_int_edge(0,H_TO_L);
   enable_interrupts(INT_TIMER1);
   enable_interrupts(INT_EXT);
   enable_interrupts(global);*/

lcd_init(); //Initialise LCD
delay_ms(10);

lcd_putc("\fHello World\n");
lcd_putc("Line Number 2");

while(1);
}


Thanks PCM Wink
PCM programmer



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Posts: 21708

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PostPosted: Mon Aug 24, 2009 12:07 pm     Reply with quote
Is it now working ?

If not, then post what lcd driver you are using. Is it the Flex driver from
the Code library forum ? Or is it the CCS lcd.c driver ?

What is your compiler version ?
Kova



Joined: 06 May 2007
Posts: 35

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PostPosted: Wed Aug 26, 2009 3:17 am     Reply with quote
PCM programmer wrote:
Is it now working ?

If not, then post what lcd driver you are using. Is it the Flex driver from
the Code library forum ? Or is it the CCS lcd.c driver ?

What is your compiler version ?


Wow...now it works!
I don't not why but this LCD works only if the Vee pin is connected to Ground Confused (without any trimmer/pot)..Bohh...

Now I have another little problem Rolling Eyes
I want to capture the signal from an IR Decoder (TMFS5000).
I searched on the forum and I have found many projects, but I want only to capture the "time of the code".

I'm explain with the code Laughing
Code:

#include <18F4550.h>
#use delay(clock=20000000)
#fuses NOWDT,HS, PUT, NOPROTECT, BROWNOUT, MCLR, NOLVP, NOCPD
#define LCD_ENABLE_PIN  PIN_E1 //E0                             
#define LCD_RS_PIN      PIN_E0 //E1                               
#define LCD_RW_PIN      PIN_E2                                   
#define LCD_DATA4       PIN_D4                                   
#define LCD_DATA5       PIN_D5                                   
#define LCD_DATA6       PIN_D6                                   
#define LCD_DATA7       PIN_D7 
#include "lcd.c"

INT8  Counter=0;
INT16 time[32];
INT16 time2[32];
INT1  Received=0;
INT1  AltoBasso=0;
INT1  Falso=0;
INT1  Cicalino=0;


#int_EXT
void EXT_isr(void)
{
//It is necessary because when pic startup there is an interrupt
if (Falso==0)
{
set_timer1(0);
Falso=1;
return;
}

 time[counter]=get_timer1();
 set_timer1(0);
 counter++;
 
//Switch from High and Low
if (AltoBasso==0)
   {
      ext_int_edge(0,L_TO_H);
      AltoBasso=1;
   }
   else if (AltoBasso==1)
   {
      ext_int_edge(0,H_TO_L);
      AltoBasso=0;
   }

//Grab max 32 edge
  if (counter==32)
  {
   Received=1;
   disable_interrupts(INT_EXT);
  }
}

#int_TIMER1
void TIMER1_isr(void)
{
counter=0;
}

void AzzeraCode(void)
{
int i=0;
   for(i=0;i<32;i=i+1)
   {
   time[i]=0;
   }
}

void write_long_to_eeprom(int8 addr, int16 data)
{
 int8 i2;

 for(i2 = 0; i2 < 2; i2++)
     write_eeprom(addr + i2, *((int8*)&data + i2) ) ;
}

int16 read_long_from_eeprom(int8 addr)
{
int8 i2;
int16 data;

for(i2 = 0; i2 < 2; i2++)
   *((int8*)&data + i2) = read_eeprom(addr + i2);

return(data);
}

void main()
{
   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
   setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
   setup_timer_2(T2_DISABLED,0,1);
   ext_int_edge(0,H_TO_L);
   enable_interrupts(INT_EXT);
   enable_interrupts(INT_TIMER1);
   enable_interrupts(GLOBAL);
   
   lcd_init(); //Initialise LCD
   delay_ms(250);
   
   lcd_putc("\fHello\n");
   
   while(1)
   {
    int ct=0;
    int contatore=0;
   
    if(Received==1)
      {         
         counter = 0;
         Received = 0;

     if(cicalino==0)
     {
       for(ct=0;ct<32;ct=ct+1)
         {
            write_long_to_eeprom(ct*2, time[ct]);
            lcd_putc("Write\n");
         }
              for(ct=0;ct<32;ct=ct+1)
            {
               time2[ct] = read_long_from_eeprom(ct*2);
               lcd_putc("\fRead\n");
            }
      cicalino=1;
     }
     
     else if (cicalino==1)
     {
         for(ct=1;ct<32;ct=ct+1)
         {   
          if ( abs((time[ct]-time2[ct])) < 300) //Threshold
            {
              contatore = contatore +1;
            }
         }
         
         if (contatore >28) //Good?
            {
            lcd_putc("\fCorrect\n");
            }
         else
            {
            lcd_putc("\fNot Correct\n");
            }
         contatore = 0;
        }
       
       AzzeraCode();
       enable_interrupts(INT_EXT);
      }

   }
}


The problem is that when I grab a "same code" the time of each edge is always different!!!

P.S.
In the absence of IR light, the output of the decoder is normally high.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Aug 26, 2009 11:54 am     Reply with quote
Describe the incoming signal to the PIC. What is the frequency and
the duty cycle ? Or, if it's an irregular pulse stream, then what is the
minimum pulse width? Post a link to a document that shows a timing
diagram of the pulses, if possible.
Kova



Joined: 06 May 2007
Posts: 35

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PostPosted: Wed Aug 26, 2009 12:03 pm     Reply with quote
PCM programmer wrote:
Describe the incoming signal to the PIC. What is the frequency and
the duty cycle ? Or, if it's an irregular pulse stream, then what is the
minimum pulse width? Post a link to a document that shows a timing
diagram of the pulses, if possible.


It's an irregular pulse stream, because I want to grab only one button from a generic remote controller.

The user push a button on the remote, the MCU grabs the code (the time of each pulse), saves the timing and associates a task.
So when the user push another time the button, the MCU reads the timing code and it compares with the timing saved in memory and if it's correct starts the task.

I don't know in advice the protocol used by the user's remote controller.
Do you think that is it possible to do that?

Thanks PCM for the help
Kova



Joined: 06 May 2007
Posts: 35

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PostPosted: Fri Aug 28, 2009 4:49 am     Reply with quote
Arghh Nothing
I have used another IR Detector (TSOP1138...active LOW)..But nothing!!
It doesn't work correctly :(...The code is no always recognized
I write another code but..nope :( not work

Code:

#include <18F4550.h>
#device adc=8
#use delay(clock=20000000,RESTART_WDT)
#fuses HS, BROWNOUT, BORV20, PUT, STVREN, NOLVP

#define LCD_ENABLE_PIN  PIN_E1 //E0                               ////
#define LCD_RS_PIN      PIN_E0 //E1                               ////
#define LCD_RW_PIN      PIN_E2                                    ////
#define LCD_DATA4       PIN_D4                                    ////
#define LCD_DATA5       PIN_D5                                    ////
#define LCD_DATA6       PIN_D6                                    ////
#define LCD_DATA7       PIN_D7 
#include "lcd.c"

unsigned INT32 time[32] = {0};
unsigned INT32 time2[32] = {0};
INT1  falso=0;
INT1  cicalino=0;

unsigned int8 rx_state = 0;
unsigned int32 timer_at_start, timer_at_end, low_time, timer_at_mid, period;
int1 data_avail = FALSE, caught_rise = TRUE;

#int_TIMER1
void TIMER1_isr(void) {
}

#int_EXT
void ext_isr(void) {
   if (caught_rise) { // this is a rising edge
      time[rx_state] = get_timer1();
     set_timer1(0);
      caught_rise = FALSE;
      rx_state++;
      ext_int_edge(0,H_TO_L);   
   }
   else { // this is a falling edge
      time[rx_state] = get_timer1();
      set_timer1(0);
     caught_rise = TRUE;
      ext_int_edge(0,L_TO_H);
      rx_state++;     
   }

   if (rx_state == 32) {
       disable_interrupts(INT_EXT);
       delay_ms(250);
       rx_state = 0;
       data_avail = TRUE;
   }
}

void AzzeraCode(void)
{
int i=0;
   for(i=0;i<32;i=i+1)
   {
   time[i]=0;
   }
}

void write_long_to_eeprom(int32 addr, unsigned int32 data)
{
 int8 i2;

 for(i2 = 0; i2 < 4; i2++)
     write_eeprom(addr + i2, *((int8*)&data + i2) ) ;
}

int32 read_long_from_eeprom(int32 addr)
{
int8 i2;
unsigned int32 data;

for(i2 = 0; i2 < 4; i2++)
   *((int8*)&data + i2) = read_eeprom(addr + i2);

return(data);
}

void main()
{
   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_psp(PSP_DISABLED);
   setup_spi(FALSE);
   setup_wdt(WDT_ON);
   setup_timer_0(RTCC_INTERNAL);
   setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
   setup_timer_2(T2_DISABLED,0,1);
   setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
   ext_int_edge(0,L_TO_H);
   enable_interrupts(INT_TIMER1);
   enable_interrupts(INT_EXT);
   enable_interrupts(global); 
   set_tris_e(0x00);
   set_tris_c(0xff);
   port_b_pullups(FALSE);
   set_tris_b(0xff);
   
   lcd_init();
   delay_ms(250);
   lcd_putc("\fHello World\n");
   rx_state = 0;
   
   while(TRUE)
   {
    int ct=0;
    int contatore=0;
    restart_wdt();
   
   if (data_avail)
   {
       data_avail = FALSE;

       if(cicalino==0)
      {
          for(ct=0;ct<32;ct=ct+1)
         {
            write_long_to_eeprom(ct*4, time[ct]);
            lcd_putc("Scritto\n");
         }
            for(ct=0;ct<32;ct=ct+1)
         {
            time2[ct] = read_long_from_eeprom(ct*4);
            lcd_putc("\fLetto\n");
         }
        cicalino=1;
        }
     
        else if (cicalino==1)
        {
          for(ct=1;ct<32;ct=ct+1)
         {   
          if ( ((time[ct]-time2[ct]) < 150) || ((time2[ct]-time[ct]) < 150) )
            {
              contatore = contatore +1;
            }
         }
         if (contatore >30)
            {
         printf(lcd_putc,"\fCORRETTO = %u", contatore);
            }
         else
            {
         printf(lcd_putc,"\fNON CORRETTO = %u", contatore);
            }
         contatore = 0;
       }
 
      AzzeraCode();
      rx_state = 0;
     delay_ms(250);
     lcd_putc("\fWaiting");
      enable_interrupts(INT_EXT);

   }
   
}
}


Crying or Very sad Crying or Very sad Crying or Very sad
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Aug 28, 2009 3:55 pm     Reply with quote
Describe the timing of the incoming signal completely.
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