[SOLVED] PIC16F877A interface with shift register 74HC595 and led

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Hi,
I don't know C++, but check your compiler manual, it's sure to have some functions for SPI operation like the SPI_Write() or SPI_Read() in mikroC. Use that and read through the relevant section in the PIC reference manual and datasheet.

Hope this helps.
Tahmid.
 


i try many times but can't get~
can you show me the full coding for SPI code based on my requirement and some explanation aside??if using SPI code need to compile by using SPI software?
really headache on it~

---------- Post added at 18:57 ---------- Previous post was at 17:57 ----------
Tahmid said:
Hi,
bsf means bit set f
bsf portd,0
means set bit 0 of portd

For SPI, take a look at my above post and the datasheet and reference manual for the PIC.

Hope this helps.
Tahmid.
Click to expand...

i have 16 led..how i assign my bit number??
 

what about basic stamp? I thought the programming was so easy...
 

basic stamp is a microcontroller and everything is included on one board. Basic language is so easy to learn and program.
 

Basic Stamp is a microcontroller with peripherals on board programmed by BASIC language, but is very slow.

I prefer using a PIC or AVR and programming it with mikroBASIC, which would let me utilize everything without making everything slow.

eg BS2SX-IC give 10kIPS operation at 50MHz clock, whereas with an ATMEGA88 I could get 20000kIPS at 20MHz clock.

Hope this helps.
Tahmid.
 

//include file
#include <pic.h>
#include "delay.h"

//16F877A configuration
__CONFIG(0x3f71);

#define PORTDIT(adr, bit) ((unsigned)(&adr)*8+(bit))

#define SHIFT_DELAY 50

#define CLK RD0
#define DATA RD1
#define RCK RD2

static bit LED0 @ PORTDIT(PORTD, 0);
static bit LED1 @ PORTDIT(PORTD, 1);
static bit LED2 @ PORTDIT(PORTD, 2);
static bit LED3 @ PORTDIT(PORTD, 3);
static bit LED4 @ PORTDIT(PORTD, 4);
static bit LED5 @ PORTDIT(PORTD, 5);
static bit LED6 @ PORTDIT(PORTD, 6);
static bit LED7 @ PORTDIT(PORTD, 7);

unsigned int i; //for loop pause
unsigned int c; //for loop event loop

//pause functions
void pause_1();
void pause_2();

//main function
void main(void)
{
unsigned char data = 0b00000001;

TRISD = 0x00;
PORTD = 0b00000000;

while(1)
{
for ( c = 0; c < 8; ++c )
{
DATA = ( ( data & ( 1 << c ) ) != 0 );
DelayMs ( SHIFT_DELAY );
CLK = 1;
DelayMs ( SHIFT_DELAY );
CLK = 0;
DelayMs ( SHIFT_DELAY );

RCK = 1;
DelayMs ( SHIFT_DELAY );
RCK = 0;
DelayMs ( SHIFT_DELAY );
}

/*
for(c=0; c<10; c++)
{


//forward
LED0 = 1;
pause_1();

LED0 = 0;
LED1 = 1;
pause_1();

LED1 = 0;
LED2 = 1;
pause_1();

LED2 = 0;
LED3 = 1;
pause_1();

LED3 = 0;
LED4 = 1;
pause_1();

LED4 = 0;
LED5 = 1;
pause_1();

LED5 = 0;
LED6 = 1;
pause_1();

LED6 = 0;
LED7 = 1;
pause_1();

LED7 = 0;



};


};*/

}

}

void pause_1()
{

for(i=0; i<4000; i++);
for(i=0; i<4000; i++);

};

void pause_2()
{

for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);

};


above is my source code include 595 code~ｉ　ｒｅｆｅｒ　ｒｅｆｅｒｅｎｃｅ　ｂｏｏｋ　ｔｏ　ｗｒｉｔｅ　ｂｕｔ　ｔｈｅ　ｅｘｐｌａ ｎａｔｉｏｎ　ｏｆ　ｂｏｏｋ　ｉｓ　ｎｏｔ　ｄｅｔａｉｌ．
i have some question:
1）((unsigned)(&adr)*8+(bit))＜＜＜＜＜＜＜＜＜＜this is means what?
2)　#define SHIFT_DELAY 50＜＜＜＜＜＜＜＜＜＜the shift_delay is means what?
３）static bit LED0 @ PORTDIT(PORTD, 0);＜＜＜ｔｈｅ　ｓｔａｔｉｃ　ｂｉｔ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
４）ｉ）void pause_1();＜＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
　　ｉｉ）void pause_2();＜＜＜＜＜＜＜＜＜＜＜＜ｃａｎ　ｉ　ｅｘｃｌｕｄｅ　ｔｈｉｓ　ｃｏｄｅ？ｊｕｓｔ 　ｐｕｔ　４）ｉ）ｃｏｄｅ？
５）unsigned char data = 0b00000001;＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
６）TRISD = 0x00;＜＜＜＜＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
　　PORTD = 0b00000000;＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
７）for ( c = 0; c < 8; ++c )＜＜＜＜＜＜＜＜＜＜＜ｗｈｙ　ｎｅｅｄ　ｔｏ　ｌｏｏｐ　７　ｔｉｍｅｓ？
８）DATA = ( ( data & ( 1 << c ) ) != 0 );＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
９）ｉｆ　ｉ　ｗａｎｔ　ｔｏ　ｃｈａｎｇｅ　ｔｈｅ　ｐａｔｔｅｒｎ　ｏｆ　ｄｉｓｐｌａｙｉｎｇ　ｌｅ ｄ，ｗｈｉｃｈ　ｐａｒｔ　ｏｆ　ｃｏｄｅ　ｓｈｏｕｌｄ　ｉ　ｃｈａｎｇｅ？


latch in shift register 595 is means what?
thanks~

---------- Post added at 04:55 ---------- Previous post was at 04:30 ----------

//include file
#include <pic.h>
#include "delay.h"

//16F877A configuration
__CONFIG(0x3f71);

#define PORTDIT(adr, bit) ((unsigned)(&adr)*8+(bit))

#define SHIFT_DELAY 50

#define CLK RD0
#define DATA RD1
#define RCK RD2

static bit LED0 @ PORTDIT(PORTD, 0);
static bit LED1 @ PORTDIT(PORTD, 1);
static bit LED2 @ PORTDIT(PORTD, 2);
static bit LED3 @ PORTDIT(PORTD, 3);
static bit LED4 @ PORTDIT(PORTD, 4);
static bit LED5 @ PORTDIT(PORTD, 5);
static bit LED6 @ PORTDIT(PORTD, 6);
static bit LED7 @ PORTDIT(PORTD, 7);

unsigned int i; //for loop pause
unsigned int c; //for loop event loop

//pause functions
void pause_1();
void pause_2();

//main function
void main(void)
{
unsigned char data = 0b00000001;

TRISD = 0x00;
PORTD = 0b00000000;

while(1)
{
for ( c = 0; c < 8; ++c )
{
DATA = ( ( data & ( 1 << c ) ) != 0 );
DelayMs ( SHIFT_DELAY );
CLK = 1;
DelayMs ( SHIFT_DELAY );
CLK = 0;
DelayMs ( SHIFT_DELAY );

RCK = 1;
DelayMs ( SHIFT_DELAY );
RCK = 0;
DelayMs ( SHIFT_DELAY );
}

/*
for(c=0; c<10; c++)
{


//forward
LED0 = 1;
pause_1();

LED0 = 0;
LED1 = 1;
pause_1();

LED1 = 0;
LED2 = 1;
pause_1();

LED2 = 0;
LED3 = 1;
pause_1();

LED3 = 0;
LED4 = 1;
pause_1();

LED4 = 0;
LED5 = 1;
pause_1();

LED5 = 0;
LED6 = 1;
pause_1();

LED6 = 0;
LED7 = 1;
pause_1();

LED7 = 0;



};


};*/

}

}

void pause_1()
{

for(i=0; i<4000; i++);
for(i=0; i<4000; i++);

};

void pause_2()
{

for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);
for(i=0; i<4000; i++);

};


above is my source code include 595 code~ｉ　ｒｅｆｅｒ　ｒｅｆｅｒｅｎｃｅ　ｂｏｏｋ　ｔｏ　ｗｒｉｔｅ　ｂｕｔ　ｔｈｅ　ｅｘｐｌａ ｎａｔｉｏｎ　ｏｆ　ｂｏｏｋ　ｉｓ　ｎｏｔ　ｄｅｔａｉｌ．
i have some question:
1）((unsigned)(&adr)*8+(bit))＜＜＜＜＜＜＜＜＜＜this is means what?
2)　#define SHIFT_DELAY 50＜＜＜＜＜＜＜＜＜＜the shift_delay is means what?
３）static bit LED0 @ PORTDIT(PORTD, 0);＜＜＜ｔｈｅ　ｓｔａｔｉｃ　ｂｉｔ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
４）ｉ）void pause_1();＜＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
　　ｉｉ）void pause_2();＜＜＜＜＜＜＜＜＜＜＜＜ｃａｎ　ｉ　ｅｘｃｌｕｄｅ　ｔｈｉｓ　ｃｏｄｅ？ｊｕｓｔ 　ｐｕｔ　４）ｉ）ｃｏｄｅ？
５）unsigned char data = 0b00000001;＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
６）TRISD = 0x00;＜＜＜＜＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
　　PORTD = 0b00000000;＜＜＜＜＜＜＜＜＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
７）for ( c = 0; c < 8; ++c )＜＜＜＜＜＜＜＜＜＜＜ｗｈｙ　ｎｅｅｄ　ｔｏ　ｌｏｏｐ　8　ｔｉｍｅｓ？
８）DATA = ( ( data & ( 1 << c ) ) != 0 );＜＜＜＜ｔｈｉｓ　ｉｓ　ｍｅａｎｓ　ｗｈａｔ？
9） void pause_1()， void pause_2()<<this is what?
10 ）for(i=0; i<4000; i++);<<why need to loop 4000 times?
11）if i want to change the pattern of displaying led，which part of code should i change？how to change?


latch in shift register 595 is means what?
thanks~
 

There is no such thing as C++ for PIC uC, and in your code that you posted, I can't see any mention of 595 shift register. For 595's you only need 3 pins: one for serial data, one for serial clock, and one for strobe (assuming that you keep your 595's constantly enabled).

---------- Post added at 20:15 ---------- Previous post was at 20:12 ----------
latch in shift register 595 is means what?
thanks~
Click to expand...

Read the datasheet for 595.

Writing software without understanding how hardware function is useless wasting of time. Bette to "waste time" reading datasheets and educating yourself
 

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