README.md

MX25L_SPI

MX25L_SPI is a library for Macronix MX25L SPI memory. Tested with MX25L8006E 8 MBit chip and ATMEGA8A.But that should work with other chips.

Usage:

#include "USART.h"
#include "MX25L.h"


int main(void)
{
	SPI_Init();
	SetStatus(0x00);
	byte status = GetStatus();
	DEBUG_PRINT("\r\nGet status:%d\r\n",status);
	DEBUG_PRINT("-----------------\r\n");
	char buffer[257];
	Get_Identification((byte *)buffer);
	DEBUG_PRINT("Identification read:\r\n");
	DEBUG_PRINT("Byte 0: %x\r\n", buffer[0]);
	DEBUG_PRINT("Byte 1: %x\r\n", buffer[1]);
	DEBUG_PRINT("Byte 2: %x\r\n", buffer[2]);
	DEBUG_PRINT("-----------------\r\n");
	DEBUG_PRINT("Clearing chip ... ");
	ChipErase();
	DEBUG_PRINT("done\r\n");
	DEBUG_PRINT("-----------------\r\n");
	buffer[256] = 0;
	char ch = 0x21;
	char page = 0;
	while (1)
	{	
		memset(buffer,ch, 256);	
		DEBUG_PRINT("Writing page %d ... ", page);
		Write(page * 256, buffer, 256);
		DEBUG_PRINT("done\r\n");
		DEBUG_PRINT("Data: %s\r\n", buffer);
		DEBUG_PRINT("Reading page %d ... ", page);
		Read(page * 256, buffer, 256);
		buffer[256] = 0;
		DEBUG_PRINT("done\r\n");
		DEBUG_PRINT("Data: %s\r\n", buffer);
		DEBUG_PRINT("\r\n\r\n");
		ch ++;
		if(ch > 0x7E) ch = 0x21;
		page ++;
		if(page > 4095) page = 0;
		_delay_ms(1000);
	}
}

Pinout:

MX25L	ATMEGA
CS	PB2
MISO	PB4
MOSI	PB3
SCLK	PB5

The code above uses serial port for debug purposes. It is assumed that ATMEGA UART port connected to PC using RS232 or some FTDI adapter.

PC	ATMEGA
RX	PD1
TX	PD0
GND	GND