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vasanthan
Joined: 18 Feb 2012
Posts: 3
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| LCD driver |
 Posted: Tue Apr 03, 2012 6:30 am |
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I am using PIC 16F887 and CCS-C compiler(version 4.093) plugin in MPLAB IDE. I've connected LCD to port D and it is working. I am using LCD.C driver to implement lcd functions in which LCD is configured as port access. Now i want to use pin 5 of port d for PWM (half bridge mode) which is already being used as LCD data pin. How do I change LCD data pin in driver ? What changes should I make in LCD.C in order to use pin D5 for PWM or to configure LCD using pin access ? I am not using pin D3. If I could use pin D3 for lcd data, can I use pin D5 for pwm ? How to do this ? I've attached LCD driver file and my code.
hardware connection details
port D
pin d0 connected to LCD enable
pin d1 connected to LCD RS
pin d2 connected to LCD R/W
pin d3 NOT USED
pin d4 connected to LCD data pin 4
pin d5 connected to LCD data pin 5
pin d6 connected to LCD data pin 6
pin d7 connected to LCD data pin 7
| Code: |
[b]LCD driver[/b]
///////////////////////////////////////////////////////////////////////////////
//// LCD.C ////
//// Driver for common LCD modules ////
Driver code deleted.
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++++++++++++++++++++++
CCS lcd driver code removed.
Reason: Forum rule #10:
10. Don't post the CCS example code or drivers.
Forum rules -
http://www.ccsinfo.com/forum/viewtopic.php?t=26245
- Forum Moderator
++++++++++++++++++++++
| Code: |
#include <16f887.h>
#device ADC=10
#use delay(clock=16000000)
#fuses HS, NOWDT, NOPROTECT, NOLVP
#use RS232(baud = 9600, xmit = PIN_C6, rcv = PIN_C7)
#include <lcd.c>
int16 temp_adc1;
float temp1;
int16 temp_adc2;
float temp2;
int16 volt_adc1;
float volt1;
int16 volt_adc2;
float volt2;
int16 crnt_adc1;
float crnt1;
int16 crnt_adc2;
float crnt2;
long pwmv_adc1;
void main()
{
lcd_init();
setup_adc(ADC_CLOCK_DIV_32);
while(1)
{
printf ( lcd_putc, "Battery Status\n" );
delay_ms(100); //print to lcd --- clear LCD --- lcd_putc("\f");
printf ("Battery Status vasanth\n\r" ); //print to serial com
delay_ms(100);
//temperature measurement
set_adc_channel(0); //read analog input from channel 0
delay_ms(10);
temp_adc1 = read_adc();
temp1 = 5.00*temp_adc1*100.00/1023.00; // = temp_adc*0.48828125;
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)temp1);
delay_ms (100); // printf(lcd_putc, "value = %lu \n",value);
lcd_putc(223); //this number 223 will display the degree sign
delay_ms (100);
lcd_putc('C');
delay_ms (10);
lcd_putc(" b1_temp");
delay_ms(100);
printf ("\n");
delay_ms (100);
printf ("%5.1f", (float)temp1);
delay_ms (100);
putc(223);
putc('C');
delay_ms (100);
puts(" b1_temp");
delay_ms (10);
printf ("\n\r");
delay_ms(100);
set_adc_channel(1); //read analog input from channel 1
delay_ms(10);
temp_adc2 = read_adc();
temp2 = temp_adc2*0.48828125;
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)temp2);
delay_ms (100);
lcd_putc(223); //this number 223 will display the degree sign
delay_ms (100);
lcd_putc('C');
delay_ms (100);
lcd_putc(" b2_temp");
delay_ms(100);
printf ("%5.1f", (float)temp2);
delay_ms (100);
putc(223);
putc('C');
delay_ms (100);
puts(" b2_temp");
delay_ms (100);
printf ("\n\r");
delay_ms(50);
//voltage measrement
set_adc_channel(2); //read analog input from channel 2
delay_ms(10);
volt_adc1 = read_adc();
volt1 = (volt_adc1*0.0048875855)+9;//(volt*5)/1023
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)volt1);
delay_ms (100);
lcd_putc('V');
delay_ms (100);
lcd_putc(" b1_volt");
delay_ms(1000);
printf ("%5.1f", (float)volt1);
delay_ms (100);
putc('V');
delay_ms (100);
puts(" b1_volt");
delay_ms (100);
printf ("\n\r");
delay_ms(50);
if(volt1<=10.5)
output_high(PIN_B2);
else
output_low(PIN_B2);
set_adc_channel(5); //read analog input from channel 5
delay_ms(10);
volt_adc2 = read_adc();
volt2 = (volt_adc2*0.0048875855)+9;//(volt*5)/1023
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)volt2);
delay_ms (100);
lcd_putc('V');
delay_ms (100);
lcd_putc(" b2_volt");
delay_ms(100);
printf ("%5.1f", (float)volt2);
delay_ms (100);
putc('V');
delay_ms (100);
puts(" b2_volt");
delay_ms (100);
printf ("\n\r");
delay_ms(50);
if(volt2<=10.5)
output_high(PIN_B3);
else
output_low(PIN_B3);
// current measurement
set_adc_channel(3); //read analog input from channel 3
delay_ms(10);
crnt_adc1 = read_adc();
crnt1 = crnt_adc1*0.0048875855;//(volt*5)/1023
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)crnt1);
delay_ms (100);
lcd_putc('A');
delay_ms (100);
lcd_putc(" b1_crnt");
delay_ms(100);
printf ("%5.1f", (float)crnt1);
delay_ms (100);
putc('A');
delay_ms (100);
puts(" b1_crnt");
delay_ms (100);
printf ("\n\r");
delay_ms(50);
set_adc_channel(6); //read analog input from channel 6
delay_ms(10);
crnt_adc2 = read_adc();
crnt2 = crnt_adc2*0.0048875855;//(volt*5)/1023
lcd_gotoxy(1,2);
printf ( lcd_putc,"%5.1f", (float)crnt2);
delay_ms (100);
lcd_putc('A');
delay_ms (100);
lcd_putc(" b2_crnt");
delay_ms(100);
printf ("%5.1f", (float)crnt2);
delay_ms (100);
putc('A');
delay_ms (100);
puts(" b2_crnt");
delay_ms (100);
printf ("\n\r");
delay_ms(50);
//pwm value
/*set_adc_channel(4); //read analog input from channel 4
delay_ms(10);
set_tris_c(0xff);
pwmv_adc1 = read_adc();
lcd_gotoxy(1,2);
printf ( lcd_putc,"pwm_v= %lu",pwmv_adc1);// or set adc=8 and get using %x for int8 pwmv_adc1
delay_ms(100);
setup_ccp1(CCP_PWM);
setup_timer_2(T2_DIV_BY_4,255,16);
set_tris_c(0x00);
set_pwm1_duty(pwmv_adc1); //Change the duty cycle
delay_ms(100);
printf (" pwm_v = %lu",pwmv_adc1);
delay_ms (100);
printf ("\n\r");
delay_ms(50);*/
}
} |
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temtronic
Joined: 01 Jul 2010
Posts: 9245
Location: Greensville,Ontario
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| Posted: Tue Apr 03, 2012 6:56 am |
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quickest,easiest solution...
..download the 'flex_lcd' driver from the code library...
It allows you to setup almost any PIC I/O pin for LCD use. |
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Mike Walne
Joined: 19 Feb 2004
Posts: 1785
Location: Boston Spa UK
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| LCD driver |
| Posted: Tue Apr 03, 2012 8:23 am |
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Or you could configure LCD bits as:-
pin d0 connected to LCD data pin 4
pin d1 connected to LCD data pin 5
pin d2 connected to LCD data pin 6
pin d3 connected to LCD data pin 7
pin d4 connected to LCD enable
pin d5 NOT USED
pin d6 connected to LCD RS
pin d7 connected to LCD R/W
You've now made d5 free for the pwm, and you're keeping the data pins together as a nibble.
You'll should only have to change the structure definition, pin I/O maps, and code where you handle data.
Mike |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Apr 03, 2012 4:07 pm |
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| Quote: | void main()
{
lcd_init();
setup_adc(ADC_CLOCK_DIV_32);
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You left out the line for setup_adc_ports(). You need it, so you can
specify which i/o pin should be enabled for Analog Input. Look in the
16F887.h file for a list of suitable parameters (sAN0, sAN1, etc.). |
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