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EECA
Joined: 24 Jan 2012
Posts: 3
Location: FL
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| Help with turn on Issues with pic 12f506 |
 Posted: Tue Jan 24, 2012 8:14 pm |
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I have a project with the Pic 12F506 where I have three switch inputs and 8 outputs to 2 RGB LEDs (6 total), 1 White LED and 1 IR LED.
Inputs are in port B bits 5, 4 and 3, b0 is not used, b1 controls the IR and b2 controls the white LED, port c controls the RGBs. LEDs are not directly connected to the Pic they are switch by mosfets. with a 20K resistor GD
The program reads the switches. Pin B5 controls whether you have a IR or a Visible mode, and B4 and B3 control functions within the mode, white, green or any other.
The mode switch is usually set to 1 which means IR mode, before the PIC is even on.
But when I just turn on the IC there is a small blink of the white and RGB LEDs, that's not a problem if the mode is set to visual, but if is set to IR is a big issue, that blink is causing all sort of issues. There are two sensors, one for visual spectrum and other for IR, they are next to each other and I don't have access to them to be modified or do anything.
I have done some debounce routines to the initial read of the switch but no luck.
Its odd because if the unit goes off in the IR mode, the next time I turned it on there is no visible blink, but if the unit was off in the visual mode and then the mode switch is set to IR, when the pic is turned on I have the blink. It goes to IR almost immediately but still I have the visual blink which is not acceptable in the IR mode.
\any help will be very appreciated
_________________
The only thing i know is that i know nothing. |
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Tue Jan 24, 2012 8:52 pm |
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You'll have to show us your code along with the compiler version. A schematic would be nice.
some questions though...
? Do you have the correct value for the current limiting resistors ?
? Are the 'control ' switches pushbuttons? IF so what is the pullup/down value ? Any electronic debouncing or just software.
? proper value for _mclr pullup?
? proper value for xtal caps?
? power supply ? +5 with at lead 5x max current draw ? |
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EECA
Joined: 24 Jan 2012
Posts: 3
Location: FL
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| Posted: Wed Jan 25, 2012 4:54 pm |
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Temtronic,
Thanks a lot for your answer the code is below, this is version from which i have detected first the issues, is was compiled with:
CCS PCB C Compiler, Version 4.073, 16875, 25-Jan-12 17:23
and regarding your questions see below in Bold the answers:
? Do you have the correct value for the current limiting resistors ?
The LEDs are not driven by the pic they are connected to the Power Source then to a resistor and then a Mosfet to ground. the pic is connected to the gate of the mosfet and to a 20K resistor that goes to ground
? Are the 'control ' switches pushbuttons? IF so what is the pullup/down value ? Any electronic debouncing or just software.
No pushbuttons they are Normally Open reed switches, and you have VDD,a 200K Resistor, and the reed and ground, i'm taking the signal to the pic form the reed.
No electronic debouncing, i need it to be just software, at this moment i'm not allow to change hardware.
? proper value for _mclr pullup?
NOMCLR
Only reset when power is off
? proper value for xtal caps?
Running from the internal clock, not room in the PCB for XTAl and i only ended up with one pin not used
? power supply ? +5 with at lead 5x max current draw ?
I'm driving the circuit with a 4 amp 5V power source and my current is at the worst 250mA.
the problem shows when i'm switching from one state to another
but mostly when i just turn on the unit even though the switch of the IR is set to be on ir. it takes a blink and then is OK.
Anyway attached is the code, if you could take a look i'll appreciated.
| Code: | #include <16F506.h>
#use delay(clock=4000000)
#fuses NOMCLR,NOPROTECT,NOWDT,INTRC_IO,IOSC4
#define SW1_IN1 PIN_B5
#define SW2_IN1 PIN_B4
#define SW3_IN1 PIN_B3
#define WHT_OUT PIN_B1
#define IR_OUT PIN_B2
#define GRN1_OUT PIN_C0
#define RED1_OUT PIN_C1
#define BLU1_OUT PIN_C2
#define GRN2_OUT PIN_C5
#define RED2_OUT PIN_C4
#define BLU2_OUT PIN_C3
void output_low(void) // Turn off all LEDS
{
output_low(WHT_OUT);
output_low(IR_OUT);
output_low(RED1_OUT);
output_low(GRN1_OUT);
output_low(BLU1_OUT);
output_low(RED2_OUT);
output_low(GRN2_OUT);
output_low(BLU2_OUT);
}
void main(void)
{
//Variables Definitions
unsigned int8 i;
int1 SW1_IN;
int1 SW2_IN;
int1 SW3_IN;
//initialization
//ADC set Up
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
//set_adc_channel(0);
// Ports set up
// setup_vref(false);
setup_comparator(NC_NC_NC_NC);
setup_counters(RTCC_INTERNAL,DISABLE_PULLUPS | DISABLE_WAKEUP_ON_CHANGE);
SW1_IN=input(SW1_IN1);
SW2_IN=input(SW2_IN1);
SW3_IN=input(SW3_IN1);
while(TRUE)
{
delay_ms(3);
SW1_IN=input(SW1_IN1);
SW2_IN=input(SW2_IN1);
SW3_IN=input(SW3_IN1);
if(SW3_IN==1) // Does the Process below for SW1_IN = High (switch is on Mode A Up)(no visual output only IR)
{
output_low(WHT_OUT); //this was place here to reinforce a no white light
if(SW1_IN==1) // Does the Process below for SW1_IN = High (switch is on function 1 or 2)
{
output_low(WHT_OUT);
if (SW2_IN==1)// Does the Process below for SW2_IN = High (switch is on function 2)
{
output_low(WHT_OUT);
for(i=0;i<25;i++) // this for is for the section of time the IR will be on
{
output_high(IR_OUT); // turn on the IR LED for the time set as on
delay_ms(8);
output_low(IR_OUT); // turn off the LEDs
delay_ms(2);
}
output_low(IR_OUT); // turn off the LEDs
delay_ms(500);
}
else // Does the Process below for SW2_IN = High (switch is on Function 1)
{
output_low(WHT_OUT);
for(i=0;i<25;i++) // this for is for the section of time the IR will be on
{
output_high(IR_OUT); // turn on the IR LED for the time set as on
delay_us(50);
output_low(IR_OUT); // turn off the LEDs
delay_us(9950);
}
output_low(IR_OUT); // turn off the LEDs
delay_ms(500);
}
}
else // Does the Process below for SW1_IN = Low (switch is on function 0)
{
output_low();
}
}
else // Does the Process below for SW3_IN = Low (switch is on Mode B Down)(visual ouput)
{
if(SW1_IN==1) // Does the Process below for SW1_IN = High (switch is on function 1 or 2)
{
if (SW2_IN==1)// Does the Process below for SW2_IN = High (switch is on function 2)
{
for(i=0;i<5;i++) // this for is for the section of time the WHT and GRN will be on
{
output_high(WHT_OUT); // turn on the LED for the time set as on
output_high(GRN1_OUT);
output_high(GRN2_OUT);
delay_us(300);
output_high(WHT_OUT); // turn off the LEDs
output_low(GRN1_OUT);
output_low(GRN2_OUT);
delay_us(9700);
}
for(i=0;i<20;i++) // this for is for the section of time the GRN will be on
{
output_low(WHT_OUT); // turn on the LED for the time set as on
output_high(GRN1_OUT);
output_high(GRN2_OUT);
delay_us(300);
output_low(WHT_OUT); // turn off the LEDs
output_low(GRN1_OUT);
output_low(GRN2_OUT);
delay_us(9700);
}
for(i=0;i<75;i++) // this for is for the section of time the LED's will be off
{
output_low(WHT_OUT); // turn off the LED for the time set as on
output_high(GRN1_OUT);
output_high(GRN2_OUT);
delay_us(300);
output_low(WHT_OUT); // turn off the LEDs
output_low(GRN1_OUT);
output_low(GRN2_OUT);
delay_us(9700);
}
}
else // Does the Process below for SW2_IN = High (switch is on Function 1)
{
output_low(WHT_OUT);
output_high(GRN1_OUT); // turn off the LED for the time set as on
output_high(GRN2_OUT);
delay_us(300);
output_low(GRN1_OUT); // turn off the LEDs
output_low(GRN2_OUT);
delay_us(9700);
}
}
else // Does the Process below for SW1_IN = Low (switch is on function 0)
{
output_low();
}
}
}// Close While
}// Close Main
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Thanks again
_________________
The only thing i know is that i know nothing. |
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EECA
Joined: 24 Jan 2012
Posts: 3
Location: FL
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| Latest Revision of code, still issues there |
| Posted: Fri Jan 27, 2012 1:19 pm |
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This is the latest code version. I changed to a switch/case, in "case" I was missing any interim state while the switch are moving from one place to another.
I also include the debounce routines. Any help will be appreciated. I don't understand why the visual LED are turning on during switch transitions. The effect is worse at start, but happens also during on condition when changing sw2.
I must be missing something here!!!
| Code: |
#include <16F506.h>
#use delay(clock=4000000)
#fuses NOMCLR,NOPROTECT,NOWDT,INTRC_IO,IOSC4
//#use standard_io(B)
#define SW1_IN1 PIN_B5
#define SW2_IN1 PIN_B4
#define SW3_IN1 PIN_B3
#define WHT_OUT PIN_B1
#define IR_OUT PIN_B2
#define GRN1_OUT PIN_C0
#define RED1_OUT PIN_C1
#define BLU1_OUT PIN_C2
#define GRN2_OUT PIN_C5
#define RED2_OUT PIN_C4
#define BLU2_OUT PIN_C3
void outputlow(void)
{
unsigned int8 portB;
unsigned int8 portC;
portB=0b00000000;
portC=0b00000000;
output_b(portB);
output_c(portC);
}
void Output_IR(void)
{
unsigned int8 portB;
unsigned int8 portC;
portB=0b00000100;
portC=0b00000000;
output_b(portB);
output_c(portC);
}
void Output_GRN(void)
{
unsigned int8 portB;
unsigned int8 portC;
portB=0b00000000;
portC=0b00100001;
output_b(portB);
output_c(portC);
}
void Output_WHT_GRN(void)
{
unsigned int8 portB;
unsigned int8 portC;
portB=0b00000010;
portC=0b00100001;
output_b(portB);
output_c(portC);
}
int1 debounce_sw1(void)
{
unsigned int8 i;
int1 temp;
temp = 0;
temp = input(SW1_IN1);
for (i=0;i<25;i++)
{
delay_ms(1);
if (temp==input(SW1_IN1))
{
temp=input(SW1_IN1);
}
else
{
i=0;
temp=input(SW1_IN1);
}
}
return (temp);
}
int1 debounce_sw2(void)
{
unsigned int8 i;
int1 temp;
temp = 0;
temp = input(SW2_IN1);
for (i=0;i<5;i++)
{
delay_ms(1);
if (temp==input(SW2_IN1))
{
temp=input(SW2_IN1);
}
else
{
i=0;
temp=input(SW2_IN1);
}
}
return (temp);
}
int1 debounce_sw3(void)
{
unsigned int8 i;
int1 temp;
temp = 0;
temp = input(SW3_IN1);
for (i=0;i<5;i++)
{
delay_ms(1);
if (temp==input(SW3_IN1))
{
temp=input(SW3_IN1);
}
else
{
i=0;
temp=input(SW3_IN1);
}
}
return (temp);
}
void main(void)
{
//Variables Definitions
unsigned int8 i;
unsigned char switches;
int1 SW1_IN;
int1 SW2_IN;
int1 SW3_IN;
//initialization
//set_tris_b(0x07); //0000 0111 seting port_B as outputs
//set_tris_c(0x3f); //0011 1111 seting port_C as outputs
//ADC set Up
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
//set_adc_channel(0);
// Ports set up
// setup_vref(false);
setup_comparator(NC_NC_NC_NC);
setup_counters(RTCC_INTERNAL,DISABLE_PULLUPS | DISABLE_WAKEUP_ON_CHANGE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_64);
outputlow();
delay_ms(20);
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
switches = 0;
outputlow();
while(TRUE)
{
switches = 0;
switches |= SW3_IN << 0;
switches |= SW2_IN << 1;
switches |= SW1_IN << 2;
switch(switches)
{
case 0b00000100:
for(i=0;i<25;i++) // this for is for the section of time the GRN will be on
{
Output_GRN();
delay_us(300);
outputlow();
delay_ms(97/10);
}
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
break;
case 0b00000101:
for(i=0;i<25;i++) // this for is for the section of time the IR will be on
{
Output_IR();
delay_us(50); //output_high(IR_OUT); // turn on the IR LED for the time set as on
outputlow();
delay_ms(199/20); //output_low(IR_OUT); // turn off the LEDs
}
outputlow();
delay_ms(500);
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
break;
case 0b00000110:
for(i=0;i<5;i++) // this for is for the section of time the WHT and GRN will be on
{
Output_WHT_GRN();
delay_us(300);
outputlow();
delay_ms(97/10);
}
for(i=0;i<20;i++) // this for is for the section of time the WHT and GRN will be on
{
Output_GRN();
delay_us(300);
outputlow();
delay_ms(97/10);
}
for(i=0;i<75;i++) // this for is for the section of time the LED's will be off
{
Output_GRN();
delay_us(300);
outputlow();
delay_ms(97/10);
}
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
break;
case 0b00000111:
for(i=0;i<25;i++) // this for is for the section of time the IR will be on
{
Output_IR(); // turn on the IR LED for the time set as on
delay_ms(8);
outputlow(); // turn off the LEDs
delay_ms(2);
}
outputlow();
delay_ms(500); //output_low(IR_OUT); // turn off the LEDs
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
break;
default:
SW3_IN = debounce_sw3();
SW2_IN = debounce_sw2();
SW1_IN = debounce_sw1();
outputlow();
break;
}
}// Close While
}// Close Main |
_________________
The only thing i know is that i know nothing. |
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