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| Author |
Message |
anilmanisingh
Joined: 31 Mar 2011
Posts: 6
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| low batt adc |
 Posted: Fri Apr 10, 2015 4:00 am |
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Hello everyone.
I want to start my switch count when the battery is above 4 volt and switch on the led. If battery is less than 4 volt switch one led at PORT C5.
But I am unable to do so.
Please help me.
| Code: |
#include <18F4520.h>
#device adc=8
#fuses INTRC_IO, BROWNOUT, PUT, NOWDT
#use delay(clock=4M)
#define BUTTON_PIN PIN_B0 // This pin must have a pull-up.
#define DEBOUNCE_PERIOD_IN_MS 10
#define DEBOUNCE_COUNT 2
void wait_for_keypress(void);
//==================================
void wait_for_keypress(void)
{
char count;
// First, wait for the button to be released. With the debounce
// values as given above, the button must be in the "up" state
// for two consecutive readings, spaced 10 ms apart.
count = 0;
while(TRUE)
{
if(input(BUTTON_PIN) == 1)
count++;
else
count = 0;
if(count == DEBOUNCE_COUNT)
break;
delay_ms(DEBOUNCE_PERIOD_IN_MS);
}
// Now that the button is up, wait until the user presses it.
// In order for the keypress to be considered valid, based
// on the debounce values listed at the beginning of the
// program, the button must be held down for two consecutive
// readings, spaced 10 ms apart.
count = 0;
while(TRUE)
{
if(input(BUTTON_PIN) == 0)
count++;
else
count = 0;
if(count == DEBOUNCE_COUNT)
break;
delay_ms(DEBOUNCE_PERIOD_IN_MS);
}
}
//====================================
void main()
{
int8 count,result;
port_b_pullups(TRUE);
count = 0;
setup_adc_ports(ALL_ANALOG);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
delay_us(20);
while(TRUE)
{
result = read_adc();
if(result<=68) //battery less than 4v
{
output_high(PIN_C5);
}
else if (result>=68 && result<=68 ) //battery above 4v
{
output_low(PIN_C5);
wait_for_keypress();
count++;
if (count > 4) count = 1;
{
if (count==1)
{
output_C(0b00000010);
delay_ms(500);
}
else if (count==2)
{
output_C(0b00000110);
delay_ms(500);
}
else if (count==3)
{
output_C(0b00001010);
delay_ms(500);
}
else if (count==4)
{
output_C(0b00000000);
delay_ms(500);
}
}
}
}
}
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++++++++++++++++++
Code block added.
- Forum Moderator
++++++++++++++++++ |
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temtronic
Joined: 01 Jul 2010
Posts: 9178
Location: Greensville,Ontario
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| Posted: Fri Apr 10, 2015 4:55 am |
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first... please use the 'code' button when posting code, it'll mke it a LOT easier to read / debug your code.
2. this statement..
if (result>=68 && result<=68 )
Play 'computer' and see what happens....
Jay |
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