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sorasit46
Joined: 07 May 2007
Posts: 69
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| Can open ADC port full time? |
 Posted: Tue Mar 17, 2009 5:45 pm |
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Hi!
In 16F886, I use ANO & AN4 for capture 2 voltages( 0.2Volts & 1.5 Volts ). Can I turn on ANO & AN4 full time or every time I read ADC I must turn on and turn off. My project read as dynamic data. What way is correct? Now I destroy this port in 2-4 hours.
| Code: |
#include <16F886.h>
#device ADC=10
#define CLOCK_SP 4000000
#fuses hs,NOLVP,WDT,NOPROTECT,NOPUT,NOBROWNOUT,NOCPD,NOWRT,NODEBUG
#use delay (clock=CLOCK_SP)
#use fast_io(A)
#use fast_io(B)
#use fast_io(C)
#byte port_b=6
#byte OSCCON = 0x08F
#ROM 0x2100 = {0x00}
.
#define Vbat PIN_A0 // Input Analog AN0 Leg2,check Battery Voltages.
#define OverMo PIN_A5 // Input Analog AN4 Leg7,check motor drive current
#define Bz PIN_A3 // Output Buzzer Leg5
#define Fl PIN_C4 // Output Flash Leg15
.
#define Vbe 0.0048875855327468230694037145650049 // Vcc/ADC10 = (5/1023)
.
float Vreadch,Vm_ref
.
Void main()
{
OSCCON=0x60;
while ((OSCCON&0x4)!=0x4);
setup_ccp1(CCP_CAPTURE_FE); // Configure CCP1 to capturerise
setup_ccp2(CCP_OFF);
enable_interrupts(INT_CCP1); // Enable interrupt CCP1
enable_interrupts(GLOBAL); // All interrupts ON
setup_adc_ports(sAN0 | sAN4); // Fix Port AN0 & AN4 for ADC
setup_adc(adc_clock_internal);
setup_spi(FALSE);
enable_interrupts(INT_TIMER0); // enable interrupt timer0
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); // setup timer0 enabled
set_timer0(0); // set timer0
setup_timer_1(T1_DISABLED); // setup timer1 disabled
setup_timer_2(T2_DISABLED,0,1); // setup timer2 disabled
set_tris_a(0b00110001);
set_tris_b(0xF8);
set_tris_c(0b11101101);
setup_wdt(WDT_2304MS);
output_low(Bz);output_low(Fl);
while(1)
{
.
.
set_adc_channel(0);delay_us(10); // Read Analog input AN0 (channel=0)
Vreadch=read_adc();delay_us(10);
Vreadch =Vreadch*Vbe;
if (Vreadch < 1.5 ) output_high(Bz);
Out7seg(Vreadch); // LED 7 Segment 3 digits.
delay_ms(1000);output_low(Bz);restart_wdt();
.
set_adc_channel(4);delay_us(10); // Read Analog input AN4 (channel=4)
Vreadch=read_adc();delay_us(10);
Vreadch =Vreadch*Vbe;
if (Vreadch > 0.2 ) output_high(Fl);
Out7seg(Vreadch);delay_ms(1000);output_low(Fl);restart_wdt();
.
.
}
}
[/quote]
OR
[quote]
Void main()
{
.
.
setup_adc_ports(NO_ANALOGS); // Don't fix port for ADC
setup_adc(ADC_OFF); // Analog to digital off
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while(1)
{
.
.
setup_adc_ports(sAN0);setup_adc(adc_clock_internal); // Turn on ADC AN0
set_adc_channel(0);delay_us(10); // Read Analog input AN0 (channel=0)
Vreadch=read_adc();delay_us(10);
setup_adc_ports(no_analogs);setup_adc(adc_Off); // Don't fix ADC port, ADC off
Vreadch =Vreadch*Vbe;
if (Vreadch < 1.5 ) output_high(Bz);
Out7seg(Vreadch); // LED 7 Segment 3 digits.
delay_ms(1000);output_low(Bz);restart_wdt();
.
setup_adc_ports(sAN4);setup_adc(adc_clock_internal); // Turn on ADC AN4
set_adc_channel(4);delay_us(10); // Read Analog input AN4 (channel=4)
Vreadch=read_adc();delay_us(10);
setup_adc_ports(no_analogs);setup_adc(adc_Off); // Don't fix ADC port, ADC off
Vreadch =Vreadch*Vbe;
if (Vreadch > 0.2 ) output_high(Fl);
Out7seg(Vreadch);delay_ms(1000);output_low(Fl);restart_wdt();
.
.
}
}
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Regards
Last edited by sorasit46 on Tue Mar 17, 2009 6:03 pm; edited 1 time in total |
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sorasit46
Joined: 07 May 2007
Posts: 69
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| Posted: Tue Mar 17, 2009 5:59 pm |
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Why I can reprogram this destroy chip (verify after programming pass). I use EPIC Version 2.46 Beta. In fact this chip can not use ADC port.
regards |
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Sydney
Joined: 13 Feb 2009
Posts: 71
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| Posted: Wed Mar 18, 2009 4:51 pm |
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| You dont need to turn it off, but you need to read the datasheet as you are using adc_clock_internal, which you shouldnt be. |
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