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Aurbo
Joined: 07 Apr 2008
Posts: 49
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| Clock/Temp code for 16F628 output_high/low problem |
 Posted: Mon Sep 29, 2008 10:24 am |
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Greetings again.
I cannot get the led's attached to Pin_B4 to function. I've tried changing the high/low states several times but the led's remain on.
Any clues?
| Code: | //================================================
// DIGITAL thermometer project
// Compiler : CCS V 3.222
//================================================
#include <16F628.h>
#use delay(clock=4000000)
#fuses NOWDT,XT, NOPUT, PROTECT,NOLVP,NOMCLR,NOLVP // for 628
//#fuses NOWDT,XT, NOPUT, PROTECT // for 84a
#include <ds1820.c>
#define DS1307_SDA PIN_A2
#define DS1307_SCL PIN_A3
#use i2c(master, sda=DS1307_SDA, scl=DS1307_SCL)
byte CONST MAP1[10]={0xFA,0x30,0xD9,0x79,0X33,0x6B,0xEB,0x38,0xFB,0x7B};
byte CONST MAP2[10]={0xDE,0x18,0xCD,0x5D,0X1B,0x57,0xD7,0x1c,0xDF,0x5F};
byte sec,min,hour;
byte fs_flag;
#define EXP_OUT_LATCH PIN_B7
#define EXP_OUT_CLOCK PIN_B3
#define EXP_OUT_DO PIN_B5
#define EXP_OUT_CLEAR PIN_B6
#define colon PIN_B4
#define DEC PIN_B1
#define INC PIN_B2
BYTE buff[9], sensor, n,temp,temp_dec,RES;
BYTE D_SHIFT;
//==========================
// initial DS1307
//==========================
void init_DS1307()
{
output_float(DS1307_SCL);
output_float(DS1307_SDA);
}
//==========================
// write data one byte to
// DS1307
//==========================
void write_DS1307(byte address, BYTE data)
{
short int status;
i2c_start();
i2c_write(0xd0);
i2c_write(address);
i2c_write(data);
i2c_stop();
i2c_start();
status=i2c_write(0xd0);
while(status==1)
{
i2c_start();
status=i2c_write(0xd0);
}
}
//==========================
// read data one byte from DS1307
//==========================
BYTE read_DS1307(byte address)
{
BYTE data;
i2c_start();
i2c_write(0xd0);
i2c_write(address);
i2c_start();
i2c_write(0xd1);
data=i2c_read(0);
i2c_stop();
return(data);
}
//=================================
// WRITE DATA TO 6B595
//=================================
void write_expanded_outputs(BYTE *D)
{
BYTE i;
for(i=1;i<=8;++i)
{ // Clock out bits from the eo array
if ((D & 0x80)==0)
output_low(EXP_OUT_DO);
else
output_high(EXP_OUT_DO);
D=D<<1;
output_high(EXP_OUT_CLOCK);
output_low(EXP_OUT_CLOCK);
}
}
//=================================
// show temperature
//=================================
void show_temp()
{
int8 count;
output_high(colon);
for (count=0;count<8;count++) // blink temperature 8 times
{
output_low(EXP_OUT_LATCH);
sensor=0; // DS1820 CONNECT TO PIN A0
init_ds1820(sensor);
write_ds1820_one_byte(0xcc, sensor); // skip ROM
write_ds1820_one_byte(0x44, sensor); // perform temperature conversion
while (read_ds1820_one_byte(sensor)==0xff); // wait for conversion complete
init_ds1820(sensor);
write_ds1820_one_byte(0xcc, sensor); // skip ROM
write_ds1820_one_byte(0xbe, sensor); // read the result
for (n=0; n<9; n++) // read 9 bytes but, use only one byte
{
buff[n]=read_ds1820_one_byte(sensor); // read DS1820
}
temp=buff[0]>>1;
if ((buff[0] & 0x1)==1)
temp_dec=5;
else
temp_dec=0;
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
D_SHIFT=0xE1; // show 'C
write_expanded_outputs(D_SHIFT);
RES=TEMP%10;
D_SHIFT=MAP1[RES];
write_expanded_outputs(D_SHIFT);
RES=TEMP/10;
if (RES==0)
D_SHIFT=0x00;
else
D_SHIFT=MAP1[RES];
write_expanded_outputs(D_SHIFT);
output_high(EXP_OUT_LATCH);
delay_ms(500);
output_low(EXP_OUT_LATCH);
for (n=1;n<=4;n++)
{
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
}
output_high(EXP_OUT_LATCH);
delay_ms(500);
}
}
//=================================
// show time 1
//=================================
void show_time1()
{
byte m;
output_low(EXP_OUT_LATCH);
output_low(colon);
min=read_ds1307(1);
hour=read_ds1307(2);
m=min & 0x0F;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
swap(min);
m=min & 0x07;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
m=hour & 0x0F;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
swap(hour);
m=hour & 0x03;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
output_high(EXP_OUT_LATCH);
swap(min);
swap(hour);
}
//=================================
// check switch
//=================================
void check_sw()
{
byte j;
if (fs_flag!=0)
{
if (!input(INC))
{
if (fs_flag==1)
{
min=read_ds1307(1);
min++;
j=min & 0x0F;
if (j>=0x0A) min=min+0x06;
if (min>=0x60) min=0;
write_ds1307(1,min);
}
else
{
hour=read_ds1307(2);
hour++;
j=hour & 0x0F;
if (j>=0x0A) hour=hour+0x06;
if (hour>=0x24) hour=0;
write_ds1307(2,hour);
}
show_time1();
}
if (!input(DEC))
{
if (fs_flag==1)
{
min=read_ds1307(1);
if (min!=0)
{
min--;
j=min & 0x0F;
if (j>=0x0A) min=min-0x06;
}
else min=0x59;
write_ds1307(1,min);
}
else
{
hour=read_ds1307(2);
if (hour!=0)
{
hour--;
j=hour & 0x0F;
if (j>=0x0A) hour=hour-0x06;
}
else hour=0x23;
write_ds1307(2,hour);
}
show_time1();
}
}
}
//=================================
// show time
//=================================
void show_time(byte fs)
{
byte m;
output_low(EXP_OUT_LATCH);
output_low(colon);
min=read_ds1307(1);
hour=read_ds1307(2);
m=min & 0x0F;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
swap(min);
m=min & 0x07;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
m=hour & 0x0F;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
swap(hour);
m=hour & 0x03;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
output_high(EXP_OUT_LATCH);
swap(min);
swap(hour);
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
//delay_ms(500);
if (fs==0)
{
output_high(colon);
//delay_ms(500);
}
else
{
if (fs==1)
{
output_high(colon);
output_low(EXP_OUT_LATCH);
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
m=hour & 0x0F;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
swap(hour);
m=hour & 0x03;
D_SHIFT=MAP1[m];
write_expanded_outputs(D_SHIFT);
output_high(EXP_OUT_LATCH);
//delay_ms(500);
}
else
{
output_high(colon);
output_low(EXP_OUT_LATCH);
m=min & 0x0F;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
swap(min);
m=min & 0x07;
D_SHIFT=MAP2[m];
write_expanded_outputs(D_SHIFT);
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
D_SHIFT=0x00;
write_expanded_outputs(D_SHIFT);
output_high(EXP_OUT_LATCH);
//delay_ms(500);
}
}
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
delay_ms(100);
check_sw();
}
#int_EXT
void EXT_isr()
{
fs_flag++;
if (fs_flag>=3) fs_flag=0;
delay_ms(100);
}
//=====================================
// main program start here
//=====================================
void main(void)
{
byte u;
delay_ms(5);
port_b_pullups(true);
output_low(EXP_OUT_CLEAR);
delay_us(10);
output_high(EXP_OUT_CLEAR);
for(RES=0;RES<80;RES++)
{
sensor=0; // DS1820 CONNECT TO PIN A0
init_ds1820(sensor);
write_ds1820_one_byte(0xcc, sensor); // skip ROM
write_ds1820_one_byte(0x44, sensor); // perform temperature conversion
while (read_ds1820_one_byte(sensor)==0xff); // wait for conversion complete
init_ds1820(sensor);
write_ds1820_one_byte(0xcc, sensor); // skip ROM
write_ds1820_one_byte(0xbe, sensor); // read the result
for (n=0; n<9; n++) // read 9 bytes but, use only one byte
{
buff[n]=read_ds1820_one_byte(sensor); // read DS1820
}
}
init_ds1307();
u=read_ds1307(0);
sec=u & 0x7F;// enable RTC
write_ds1307(0,sec); // set second to 00 and enable clock(bit7=0)
output_low(EXP_OUT_CLOCK);
fs_flag=0;
ext_int_edge(H_TO_L); // init interrupt triggering for button press
enable_interrupts(INT_EXT);
enable_interrupts(GLOBAL);
while(true)
{
disable_interrupts(INT_EXT);
if (fs_flag==0)
{
show_temp();
}
enable_interrupts(INT_EXT);
for (u=0;u<20;u++)
{
show_time(fs_flag);
}
}
} //end of main program
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Sep 29, 2008 2:56 pm |
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Make a test program that tests the one thing that you want to look at.
Make the program be as simple as possible. Example:
This program will blink the "colon" LED once per second.
| Code: |
#include <16F628.h>
#fuses XT, NOWDT, NOPROTECT, PUT, BROWNOUT, NOLVP
#use delay(clock=4000000)
#define COLON PIN_B4
//===================
void main()
{
while(1)
{
output_high(COLON);
delay_ms(500);
output_low(COLON);
delay_ms(500);
}
}
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Aurbo
Joined: 07 Apr 2008
Posts: 49
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| Posted: Mon Sep 29, 2008 3:54 pm |
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Thanks PCM
I ran a test program and B4 was still non-functional.
Removed the Transistor, and it worked after re-wiring that section.
Replaced the transistor with its opposite counterpart, swapping the NPN for a PNP and its now working.
The circuit component was identified incorrectly on the schematic.
My next step is to get the DS1307 to count DOWN instead of UP. |
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