라즈베리파이 EEPROM 메모리 사용하기

라즈베리파이 EEPROM 사용하기  2        RASPBERRY-PI

#include <stdio.h>
#include <string.h>
#include <wiringPi.h>
#include <wiringPiSPI.h>

#define CS_EEPROM		8
#define SPI_CHANNEL		0
#define SPI_SPEED		1000000

#define WREN 			0x06
#define WRDI			0x04
#define RDSR			0x05
#define WRSR			0x01
#define READ			0x03
#define WRITE			0x02

int main(void)
{
	char buff[9];
	wiringPiSetupGpio();

	if(wiringPiSPISetup(SPI_CHANNEL, SPI_SPEED) <0)
	{
		return -1;
	}

	pinMode(CS_EEPROM, OUTPUT);
	digitalWrite(CS_EEPROM, HIGH);
	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = WREN;
	wiringPiSPIDataRW(SPI_CHANNEL, buff, 1);
	delayMicroseconds(1);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1);

	printf("SAVE:RASPI\n");
	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = WRITE;
	buff[1] = 0x00;
	buff[2] = 0x11;
	buff[3] = 'R';
	buff[4] = 'A';
	buff[5] = 'S';
	buff[6] = 'P';
	buff[7] = 'I';
	buff[8] = '\n';

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 9);
	delayMicroseconds(1000);
	digitalWrite(CS_EEPROM, HIGH);
	delay(5000);

	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = WRDI;

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 1);
	delayMicroseconds(1);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1);

	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = READ;
	buff[1] = 0x00;
	buff[2] = 0x11;

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 9);
	delayMicroseconds(1000);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1000);

	printf("READ:");

	int i;
	for(i=3; i<9; i++)
	{
		printf("%c", buff[i]);
	}
	printf("\n");
	return 0;
}

 

라즈베리파이 EEPROM  사용하기  1        RASPBERRY-PI   

#include <stdio.h>
#include <string.h>
#include <wiringPi.h>
#include <wiringPiSPI.h>

#define CS_EEPROM		8
#define SPI_CHANNEL		0
#define SPI_SPEED		1000000

#define WREN 			0x06
#define WRDI			0x04
#define RDSR			0x05
#define WRSR			0x01
#define READ			0x03
#define WRITE			0x02

int main(void)
{
	char buff[9];
	wiringPiSetupGpio();

	if(wiringPiSPISetup(SPI_CHANNEL, SPI_SPEED) <0)
	{
		return -1;
	}

	pinMode(CS_EEPROM, OUTPUT);
	digitalWrite(CS_EEPROM, HIGH);
	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = WREN;
	wiringPiSPIDataRW(SPI_CHANNEL, buff, 1);
	delayMicroseconds(1);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1);

	printf("Input String:");
	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);

	buff[0] = WRITE;
	buff[1] = 0x00;
	buff[2] = 0x11;
	
	int i;
	for(i=3; i<9; i++)
	{
		scanf("%c", &buff[i]);
	}

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 9);
	delayMicroseconds(1000);
	digitalWrite(CS_EEPROM, HIGH);
	delay(5000);

	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = WRDI;

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 1);
	delayMicroseconds(1);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1);

	digitalWrite(CS_EEPROM, LOW);
	delayMicroseconds(1);
	buff[0] = READ;
	buff[1] = 0x00;
	buff[2] = 0x11;

	wiringPiSPIDataRW(SPI_CHANNEL, buff, 9);
	delayMicroseconds(1000);
	digitalWrite(CS_EEPROM, HIGH);
	delay(1000);

	printf("READ:");

	for(i=3; i<9; i++)
	{
		printf("%c", buff[i]);
	}
	printf("\n");
	return 0;
}