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jov_damo86
Joined: 29 Nov 2007
Posts: 9
Location: Sarrat, Ilocos Norte,Philippines
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| counting on a 7 segment display (please help!) |
 Posted: Thu Nov 29, 2007 3:45 am |
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please any code for PIC16f877A to display a simple counting 0-9 and then reset on portB using 7 segment display.
i really appreciate any help for this project!
thank you!  |
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Eugeneo
Joined: 30 Aug 2005
Posts: 155
Location: Calgary, AB
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jov_damo86
Joined: 29 Nov 2007
Posts: 9
Location: Sarrat, Ilocos Norte,Philippines
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| Posted: Thu Nov 29, 2007 4:39 am |
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Thanks a lot but i need for C language using CCS C compiler!
your contribution help me a lot!
God Bless! |
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Eugeneo
Joined: 30 Aug 2005
Posts: 155
Location: Calgary, AB
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| Posted: Thu Nov 29, 2007 4:47 am |
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Feel free to use this code.
It uses 6x7 segment LED display
SPI input
| Code: |
#include <16F818.H>
#use delay(clock=8000000)
//////// Fuses: LP,XT,HS,EC_IO,INTRC_IO,INTRC,RC_IO,RC,WDT,NOWDT,PUT,NOPUT
//////// Fuses: MCLR,NOMCLR,BROWNOUT,NOBROWNOUT,LVP,NOLVP,CPD,NOCPD,WRT
//////// Fuses: NOWRT,DEBUG,NODEBUG,CCPB2,CCPB3,PROTECT,NOPROTECT
#fuses INTRC_IO,NOPROTECT,NOWDT,PUT,NOLVP,NOMCLR,NOWRT,NODEBUG,BROWNOUT,CCPB3
#byte OSCCON = 0x8F
#bit CCP1IF = 0x0C.2
// Clock mode=1 for Address B
#define Display_type 0 // Normal mode=0 for address A
#if Display_type==0
#define SLAVE_ADDRESS 'A'
#endif
#if Display_type==1
#define SLAVE_ADDRESS 'B'
#endif
#define SEGMENT_MODE 2 // 1=NPN OR 2=PNP
struct HighLow
{
char l;
char h;
};
union hl
{
long L;
struct HighLow hl;
};
// 0-A
// ********
// 5-F* *1-B
// * 6-G *
// ********
// 4-E* *2-C
// * 3-D *
// ********
//
//0123456789_- //
byte CONST LED_MAP[13] =
{0b11000000,0b11111001,0b10100100,0b10110000,0b10011001,0b10010010
,0b10000010,0b11111000,0b10000000,0b10010000,0b11110111,0b10111111,0b11111111};
#define SEG_A PIN_A0
#define SEG_B PIN_A1
#define SEG_C PIN_A2
#define SEG_D PIN_A3
#define SEG_E PIN_A4
#define SEG_F PIN_A6
#define SEG_G PIN_A7
//#define DIG_1 PIN_B6
//#define DIG_2 PIN_B7
//#define DIG_3 PIN_B0
//#define DIG_4 PIN_B5
//#define DIG_5 PIN_B3
//#define DIG_6 PIN_B5
#define DIG_1 PIN_B5
#define DIG_2 PIN_B3
#define DIG_3 PIN_B6
#define DIG_4 PIN_B0
#define DIG_5 PIN_B7
//#define DIG_6 PIN_B5
#if SEGMENT_MODE==1 //NPN
#define SEG_A_ON output_low(SEG_A)
#define SEG_B_ON output_low(SEG_B)
#define SEG_C_ON output_low(SEG_C)
#define SEG_D_ON output_low(SEG_D)
#define SEG_E_ON output_low(SEG_E)
#define SEG_F_ON output_low(SEG_F)
#define SEG_G_ON output_low(SEG_G)
#define SEG_A_OFF output_high(SEG_A)
#define SEG_B_OFF output_high(SEG_B)
#define SEG_C_OFF output_high(SEG_C)
#define SEG_D_OFF output_high(SEG_D)
#define SEG_E_OFF output_high(SEG_E)
#define SEG_F_OFF output_high(SEG_F)
#define SEG_G_OFF output_high(SEG_G)
#define DIG_1_ON output_high(DIG_1);
#define DIG_2_ON output_high(DIG_2);
#define DIG_3_ON output_high(DIG_3);
#define DIG_4_ON output_high(DIG_4);
#define DIG_5_ON output_high(DIG_5);
#define DIG_6_ON output_high(DIG_6);
#define DIG_1_OFF output_low(DIG_1);
#define DIG_2_OFF output_low(DIG_2);
#define DIG_3_OFF output_low(DIG_3);
#define DIG_4_OFF output_low(DIG_4);
#define DIG_5_OFF output_low(DIG_5);
#define DIG_6_OFF output_low(DIG_6);
#endif
#if SEGMENT_MODE==2 // PNP
#define SEG_A_ON output_high(SEG_A)
#define SEG_B_ON output_high(SEG_B)
#define SEG_C_ON output_high(SEG_C)
#define SEG_D_ON output_high(SEG_D)
#define SEG_E_ON output_high(SEG_E)
#define SEG_F_ON output_high(SEG_F)
#define SEG_G_ON output_high(SEG_G)
#define SEG_A_OFF output_low(SEG_A)
#define SEG_B_OFF output_low(SEG_B)
#define SEG_C_OFF output_low(SEG_C)
#define SEG_D_OFF output_low(SEG_D)
#define SEG_E_OFF output_low(SEG_E)
#define SEG_F_OFF output_low(SEG_F)
#define SEG_G_OFF output_low(SEG_G)
#define DIG_1_ON output_low(DIG_1);
#define DIG_2_ON output_low(DIG_2);
#define DIG_3_ON output_low(DIG_3);
#define DIG_4_ON output_low(DIG_4);
#define DIG_5_ON output_low(DIG_5);
#define DIG_6_ON output_low(DIG_6);
#define DIG_1_OFF output_high(DIG_1);
#define DIG_2_OFF output_high(DIG_2);
#define DIG_3_OFF output_high(DIG_3);
#define DIG_4_OFF output_high(DIG_4);
#define DIG_5_OFF output_high(DIG_5);
#define DIG_6_OFF output_high(DIG_6);
#endif
byte string_data[7];
byte display_data[7];
byte display_data1[7];
byte display_output=0;
int display_index=0;
int rx_index=0;
int display_char;
int display_seg;
int rx_in;
int check_sum;
int temp=0;
short refresh_bit=0;
union HL display_bits;
#INT_SSP
void ssp_interupt ()
{
rx_in=spi_read();
if(rx_index==0)
if (rx_in==SLAVE_ADDRESS)
{
rx_index=1;
return;
}
if(rx_index==1)
{
display_bits.hl.h=rx_in;
rx_index=2;
return;
}
if(rx_index==2)
{
display_bits.hl.l=rx_in;
rx_index=3;
return;
}
if(rx_index==3)
{
check_sum=rx_in;
rx_index=4;
return;
}
rx_index=0;
setup_spi(SPI_SLAVE | SPI_H_TO_L | SPI_CLK_DIV_16 | SPI_SS_DISABLED);
enable_interrupts(INT_SSP);
}
#int_ccp1 // **************** ccp1 second timer interrupt *******************//
void refresh_display ()
{
refresh_bit=0;
display_index+=1;
if (display_index>4)
display_index=0;
DIG_1_OFF;
DIG_2_OFF;
DIG_3_OFF;
DIG_4_OFF;
DIG_5_OFF;
display_output=display_data[display_index];
display_seg=display_data1[display_index];
if (bit_test(display_output,0))
SEG_A_ON;
else
SEG_A_OFF;
if (bit_test(display_output,1))
SEG_B_ON;
else
SEG_B_OFF;
if (bit_test(display_output,2))
SEG_C_ON;
else
SEG_C_OFF;
if (bit_test(display_output,3))
SEG_D_ON;
else
SEG_D_OFF;
if (bit_test(display_output,4))
SEG_E_ON;
else
SEG_E_OFF;
if (bit_test(display_output,5))
SEG_F_ON;
else
SEG_F_OFF;
if (bit_test(display_output,6))
SEG_G_ON;
else
SEG_G_OFF;
if(display_index==0)
DIG_1_ON;
if(display_index==1)
DIG_2_ON;
if(display_index==2)
DIG_3_ON;
if(display_index==3)
DIG_4_ON;
if(display_index==4)
DIG_5_ON;
if(display_seg==0) //dig0, 6
CCP_1=500;
if(display_seg==1) //dig1, 2
CCP_1=150;
if(display_seg==2) //dig2, 5
CCP_1=400;
if(display_seg==3) //dig3, 5
CCP_1=400;
if(display_seg==4) //dig4, 4
CCP_1=350;
if(display_seg==5) //dig5, 5
CCP_1=400;
if(display_seg==6) //dig6, 6
CCP_1=450;
if(display_seg==7) //dig7, 3
CCP_1=200;
if(display_seg==8) //dig8, 7
CCP_1=500;
if(display_seg==9) //dig9, 6
CCP_1=450;
if(display_seg==11) //dig9, 6
CCP_1=200;
set_timer1(0);
ccp1if=0;
}
void main(void)
{
OSCCON=OSC_8MHZ;
setup_wdt(WDT_144MS);
display_data[0]=LED_MAP[11];
display_data[1]=LED_MAP[11];
display_data[2]=LED_MAP[11];
display_data[3]=LED_MAP[11];
display_data[4]=LED_MAP[11];
display_data1[0]=11;
display_data1[1]=11;
display_data1[2]=11;
display_data1[3]=11;
display_data1[4]=11;
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8); // timer 1 interval
setup_ccp1(CCP_COMPARE_INT); // Configure CCP1 to set
enable_interrupts(INT_CCP1); // No secondary serial interrupts
set_timer1(0);
CCP_1=5000;
setup_spi(SPI_SLAVE | SPI_H_TO_L | SPI_CLK_DIV_16 | SPI_SS_DISABLED);
enable_interrupts(INT_SSP);
enable_interrupts(GLOBAL); // No secondary serial interrupts
do
{
restart_wdt();
//if (refresh_bit)
// refresh_display();
if (rx_index==4)
{
if(check_sum==display_bits.hl.l+display_bits.hl.h+128)
#if Display_Type==1
sprintf(string_data,"%05lu",display_bits.L);
#else
sprintf(string_data,"%5lu",display_bits.L);
#endif
temp=0;
rx_index=0;
do
{
display_char=string_data[temp];
if (display_char>47 && display_char<58)
display_char=display_char-48;
if (display_char>10) // not within character specs
display_char=12; // space
#if Display_type==1
if (temp==2) // for a time chip remove this line
display_char=11;
#endif
display_data[temp]=LED_MAP[display_char];
display_data1[temp]=display_char;
temp+=1;
}while (temp<=6);
}
} while (TRUE);
}
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jov_damo86
Joined: 29 Nov 2007
Posts: 9
Location: Sarrat, Ilocos Norte,Philippines
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| Posted: Thu Nov 29, 2007 5:10 am |
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oh yes! thanks you very much!
i'll try to examine it! |
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meereck
Joined: 09 Nov 2006
Posts: 173
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| Posted: Thu Nov 29, 2007 2:21 pm |
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I have a 7seg display with a common cathode, which is connected to the PORTB (bits 0-6) of a PIC.
this is the array of 0-9 values where index is the number I want to show.
| Code: | const int8 bcd27seg[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};//BCD to 7seg
void WriteDigit(char c) //c is a value of 0 to 9
{
if(c<10)
{// number
output_b(bcd27seg[c]);
}
}
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good luck |
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jov_damo86
Joined: 29 Nov 2007
Posts: 9
Location: Sarrat, Ilocos Norte,Philippines
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| Posted: Fri Nov 30, 2007 9:16 pm |
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| oh! how nice... thanks meereck for that code.. |
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