I am having problem with both software I2C and SPI. Both cant seems to initialize DS1307 and 74HC595. I hope someone can help. Thanks in advance.
SPI
- CODE: SELECT_ALL_CODE
#include <htc.h>
#include "sw_spi.h"
#include "delay.h"
void main(void){
// configure software SPI
OpenSWSPI();
char x = 0b10000000;
//ClearCSSWSPI(); //clear CS pin
// WriteSWSPI(0x40);
// WriteSWSPI(0x05);
// WriteSWSPI(0x38);
// SetCSSWSPI();
ClearCSSWSPI(); //clear CS pin
WriteSWSPI(0x40);
WriteSWSPI(0x00);
WriteSWSPI(0x00);
SetCSSWSPI();
ClearCSSWSPI(); //clear CS pin
WriteSWSPI(0x40); //write opcode
WriteSWSPI(0x0A); //write address
WriteSWSPI(0xFF); //all outputs high
SetCSSWSPI();
}
- CODE: SELECT_ALL_CODE
#include <pic18.h>
#ifndef __SW_SPI_H
#define __SW_SPI_H
/* PIC18 Software SPI library header
*
* To use the software spi routines, the user must define
* the port and tris register for each of the CS, DIN, DOUT,
* and SCK pins. The SPI mode must also be defined (MODE0,
* MODE1, MODE2, MODE3).
*
* Define the port and pin for each of the software SPI pins
* - Chip select pin CS must have a port and tris definition.
* - Data in pin DIN must have a port and tris definition.
* - Data out pin DOUT must have a port and tris definition.
* - Clock pin SCK must have a port and tris definition.
*/
#if defined (_18F13K50) || defined (_18F14K50) ||\
defined (_18LF13K50) || defined (_18LF14K50) ||\
defined (_18F13K20) || defined (_18F14K20) ||\
defined (_18F13K22) || defined (_18F14K22) ||\
defined (_18LF13K22) || defined (_18LF14K22)
#define SW_CS_PIN PORTDbits.RD2 // Chip Select
#define TRIS_SW_CS_PIN TRISD2
#define SW_DIN_PIN PORTDbits.RD1 // Data in
#define TRIS_SW_DIN_PIN TRISD1
#define SW_DOUT_PIN PORTDbits.RD3 // Data out
#define TRIS_SW_DOUT_PIN TRISD3
#define SW_SCK_PIN PORTDbits.RD0 // Clock
#define TRIS_SW_SCK_PIN TRISD0
#else
#define SW_CS_PIN LATD2 // Chip Select
#define TRIS_SW_CS_PIN TRISD2
#define SW_DIN_PIN LATD1 // Data in
#define TRIS_SW_DIN_PIN TRISD1
#define SW_DOUT_PIN LATD3 // Data out
#define TRIS_SW_DOUT_PIN TRISD3
#define SW_SCK_PIN LATD0 // Clock
#define TRIS_SW_SCK_PIN TRISD0
#endif
// Define the mode for software SPI
// Refer to the SPI module for PIC17C756 for definitions of CKP and CKE
// Only one mode can be uncommented, otherwise the software will not work
//#define _MODE0 // CKP=0,CKE=0
//#define _MODE1 // CKP=1,CKE=0
#define _MODE2 // CKP=0,CKE=1
//#define _MODE3 // CKP=1,CKE=1
/* OpenSWSPI (SWOpenSPI)
* Configure Software SPI I/O pins
*/
void OpenSWSPI(void);
#define SWOpenSPI OpenSWSPI
/* WriteSWSPI (SWWriteSPI)
* Write a data byte to the SPI, return byte read
*/
char WriteSWSPI(char);
#define SWWriteSPI WriteSWSPI
/* SetCSSWSPI (SWSetCSSPI)
* Sets the CS pin
*/
#define SetCSSWSPI( ) SW_CS_PIN=1 // Sets the CS pin
#define SWSetCSSPI SetCSSWSPI
/* ClearCSSWSPI (SWClearCSSPI)
* Clears the CS pin
*/
#define ClearCSSWSPI( ) SW_CS_PIN=0 // Clears the CS pin
#define SWClearCSSPI ClearCSSWSPI
/* putcSWSPI (SWputcSPI)
* putc is really write
*/
#define putcSWSPI WriteSWSPI
#define SWputcSPI putcSWSPI
#endif /* __SW_SPI_H */
I2C
- CODE: SELECT_ALL_CODE
#include <htc.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include "delay.h"
#include "sw_i2c.h"
//-----------------------------------------------------------------
//Routines for DS1307
//-----------------------------------------------------------------
void write_ds1307(unsigned char address, unsigned char data)
{ di();
short int status;
SWStartI2C();
SWPutcI2C(0xd0);
SWPutcI2C(address);
SWPutcI2C(data);
SWStopI2C();
SWRestartI2C();
status=SWPutcI2C(0xd0);
while(status==1)
{
SWStartI2C();
status=SWPutcI2C(0xd0);
}
DelayMs(10);
ei();
}
//==========================
// read data one byte from DS1307
//==========================
unsigned char read_ds1307(unsigned char address)
{
di();
unsigned char data;
SWStartI2C();
SWPutcI2C(0xd0);
SWPutcI2C(address);
SWRestartI2C();
SWPutcI2C(0xd1);
data = SWGetsI2C( 0, 0 );
SWStopI2C();
ei();
return(data);
}
void main(void){
unsigned char sec,min,hour,day,date,month,year;
BRGH = 1 ;
SYNC = 0;
SPBRG = 129;//9600
TXSTA = 0x20;
RCSTA = 0x09;
TRISC6 = 0;
TRISC7 = 1;
sec = read_ds1307(0);
write_ds1307(0,sec & 0x7F); // enable oscillator(bit 7 =0)
//Set Time
write_ds1307(0,0x80); //Reset second to 0 sec. and stop Oscillator
write_ds1307(1,0x10); //write min 27
write_ds1307(2,0x01); //write hour 14
write_ds1307(3,0x02); //write day of week 2:Monday
write_ds1307(4,0x05); // write date 17
write_ds1307(5,0x01); // write month 6 June
write_ds1307(6,0x09); // write year 8 --> 2008
write_ds1307(7,0x10); //SQWE output at 1 Hz
write_ds1307(0,0x00); //Reset second to 0 sec. and start Oscillator
while(1)
{
sec=read_ds1307(0); // read second
min=read_ds1307(1); // read minute
hour=read_ds1307(2); // read hour
day=read_ds1307(3); // read day
date=read_ds1307(4); // read date
month=read_ds1307(5); // read month
year=read_ds1307(6); // read year
putch(0x0c);
printf("Time : %02d:%02d:%02d\r\n",hour,min,sec);
printf("Day : %02d\r\n",date);
printf("Date : %02d/%02d/20%02d\r\n",day,month,year);
DelayMs(500);
}
}
- CODE: SELECT_ALL_CODE
#include <htc.h>
#ifndef __SWI2C16_H
#define __SWI2C16_H
/* PIC18 software I2C interface header */
/***** COMMON FUNCTION PROTOTYPES *****/
void SWStopI2C ( void ); // Generate bus stop condition
void SWStartI2C ( void ); // Generate bus start condition
void SWRestartI2C ( void ); // Generate bus restart condition
void SWStopI2C ( void ); // Generate bus stop condition
// USER NEEDS TO DEFINE DATA AND CLOCK RESISTORS ARE REQUIRED ON
// DATA AND CLOCK
#if defined(__18F1220) || defined(__18F1320) ||\
defined(__18F1230) || defined(__18F1330)
#define DATA_LOW TRISB4 = 0; // define macro for data pin output
#define DATA_HI TRISB4 = 1; // define macro for data pin input
#define DATA_LAT LATB4 // define macro for data pin latch
#define DATA_PIN PORTBbits.RB4 // define macro for data pin
#define CLOCK_LOW TRISB3 = 0; // define macro for clock pin output
#define CLOCK_HI TRISB3 = 1; // define macro for clock pin input
#define SCLK_LAT LATB3 // define macro for clock pin latch
#define SCLK_PIN PORTBbits.RB3 // define macro for clock pin
#elif defined(__18F2455) || defined(__18F2550) || \
defined(__18F4455) || defined(__18F4550) || \
defined(__18F2450) || defined(__18F2458) ||\
defined(__18F2553) || defined(__18F4450) ||\
defined(__18F4458) || defined(__18F4553)
#define DATA_LOW TRISB0 = 0; // define macro for data pin output
#define DATA_HI TRISB0 = 1; // define macro for data pin input
#define DATA_LAT LATB0 // define macro for data pin latch
#define DATA_PIN PORTBbits.RB0 // define macro for data pin
#define CLOCK_LOW TRISB1 = 0; // define macro for clock pin output
#define CLOCK_HI TRISB1 = 1; // define macro for clock pin input
#define SCLK_LAT LATB1 // define macro for clock pin latch
#define SCLK_PIN PORTBbits.RB1 // define macro for clock pin
#elif defined(__18F24J50) || defined(__18F25J50) || \
defined(__18LF24J50) || defined(__18LF25J50) || \
defined(__18F26J50) || defined(__18F44J50) || \
defined(__18LF26J50) || defined(__18LF44J50) || \
defined(__18F45J50) || defined(__18F46J50) || \
defined(__18LF45J50) || defined(__18LF46J50)
#define DATA_LOW TRISB5 = 0; // define macro for data pin output
#define DATA_HI TRISB5 = 1; // define macro for data pin input
#define DATA_LAT LATB5 // define macro for data pin latch
#define DATA_PIN PORTBbits.RB5 // define macro for data pin
#define CLOCK_LOW TRISB4 = 0; // define macro for clock pin output
#define CLOCK_HI TRISB4 = 1; // define macro for clock pin input
#define SCLK_LAT LATB4 // define macro for clock pin latch
#define SCLK_PIN PORTBbits.RB4 // define macro for clock pin
#else
#define DATA_LOW TRISC4 = 0; // define macro for data pin output
#define DATA_HI TRISC4 = 1; // define macro for data pin input
#define DATA_LAT LATC4 // define macro for data pin latch
#define DATA_PIN PORTCbits.RC4 // define macro for data pin
#define CLOCK_LOW TRISC3 = 0; // define macro for clock pin output
#define CLOCK_HI TRISC3 = 1; // define macro for clock pin input
#define SCLK_LAT LATC3 // define macro for clock pin latch
#define SCLK_PIN PORTCbits.RC3 // define macro for clock pin
#endif
/***** FUNCTION PROTOTYPES FOR PIC18CXXX *****/
signed char SWAckI2C( void ); // Read bus ACK condition
signed char Clock_test( void );
unsigned int SWReadI2C( void ); // Read in single byte
signed char SWWriteI2C( unsigned char data_out ); // Write out single byte
signed char SWGetsI2C( unsigned char *rdptr, unsigned char length ); // Read in string from I2C module
signed char SWPutsI2C( unsigned char *wrptr ); // Write string to I2C module
#define SWPutcI2C SWWriteI2C
#define SWGetcI2C SWReadI2C
#define SWNotAckI2C SWAckI2C
#endif
