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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/****************************************************************************
*
* Comments:
* This file contains the functions which write and read the SPI memories
* using the ECSPI driver in interrupt mode.
*
****************************************************************************/
#include <stdio.h>
#include "ecspi_xfer.h"
#include "uart_imx.h"
#include "debug_console_imx.h"
#include "spi_memory.h"
/******************************************************************************
*
* Function Name : M25P32_ReadStatus
* Comments : This function reads memory status register
* Return: Status read.
*
******************************************************************************/
uint8_t M25P32_ReadStatus(void)
{
uint8_t Txbuffer[2];
uint8_t Rxbuffer[2];
PRINTF("Read memory status ... ");
/* write instruction */
Txbuffer[0] = SPI_MEMORY_READ_STATUS;
Txbuffer[1] = 0xFF;
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, (uint8_t*)Rxbuffer, 2))
PRINTF("Read memory status error!\n\r");
/* The received second byte is real value of status register */
PRINTF("0x%02x\n\r", Rxbuffer[1]);
return Rxbuffer[1];
}
/******************************************************************************
*
* Function Name : M25P32_SetWriteEnable
* Comments : This function sets latch to enable/disable memory write
* operation
*
******************************************************************************/
void M25P32_SetWriteEnable(bool enable)
{
uint8_t Txbuffer[1];
if(enable)
{
PRINTF("Enable write latch in memory ...");
Txbuffer[0] = SPI_MEMORY_WRITE_ENABLE;
}
else
{
PRINTF("Disable write latch in memory ...");
Txbuffer[0] = SPI_MEMORY_WRITE_DISABLE;
}
/* write instruction */
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, 0, 1))
PRINTF("Set memory write enable error!\n\r");
PRINTF("OK\n\r");
}
/******************************************************************************
*
* Function Name : M25P32_SetProtection
* Comments : This function sets write protection in memory status register
*
******************************************************************************/
void M25P32_SetProtection(bool protect)
{
uint8_t protection;
uint8_t Txbuffer[2];
/* enable write operation */
M25P32_SetWriteEnable(true);
/* read status register */
M25P32_ReadStatus();
if(protect)
{
PRINTF("Write protect memory ... ");
protection = 0xFF;
}
else
{
PRINTF("Write unprotect memory ... ");
protection = 0x00;
}
Txbuffer[0] = SPI_MEMORY_WRITE_STATUS;
Txbuffer[1] = protection;
/* write instruction */
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, 0, 2))
PRINTF("Set memory protection error!\n\r");
PRINTF("OK\n\r");
M25P32_ReadStatus();
}
/******************************************************************************
*
* Function Name : M25P32_EraseChip
* Comments : This function erases the whole memory SPI chip
*
******************************************************************************/
void M25P32_EraseChip(void)
{
uint8_t Txbuffer[1];
volatile uint32_t i, j;
/* Enable Write */
M25P32_SetWriteEnable(true);
M25P32_ReadStatus();
PRINTF("Erase whole memory chip:\n\r");
Txbuffer[0] = SPI_MEMORY_BULK_ERASE;
/* write instruction */
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, 0, 1))
PRINTF("Erase memory error!\n\r");
/* wait erase end */
while(M25P32_ReadStatus() & 1)
{
//M25P32_ReadStatus();
for(i=0; i<0xFFF; i++)
for(j=0; j<0xFF; j++);
}
PRINTF("Erase chip ...OK\n\r");
}
/******************************************************************************
*
* Function Name : M25P32_WriteData
* Comments : This function writes data buffer to memory using page write
* Return: Number of bytes written.
*
******************************************************************************/
uint32_t M25P32_WriteData (uint32_t addr, uint32_t size, uint8_t* data)
{
uint8_t Txbuffer[50];
uint32_t i;
/* Enable Write */
M25P32_SetWriteEnable(true);
PRINTF("Page write %d bytes to location 0x%08x in memory:\n\r", size, addr);
/* Write instruction, address and data */
Txbuffer[0] = SPI_MEMORY_PAGE_PROGRAM;
for(i=SPI_MEMORY_ADDRESS_BYTES; i; i--)
{
Txbuffer[i] = (uint8_t)(addr & 0xFF);
addr >>= 8;
}
for(i=SPI_MEMORY_ADDRESS_BYTES+1; i<size+SPI_MEMORY_ADDRESS_BYTES+1; i++)
Txbuffer[i] = *data++;
/* write instruction */
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, 0, size+4))
PRINTF("Write memory data error!\n\r");
while(M25P32_ReadStatus() & 1)
{
for(i=0; i<0xFF; i++); //wait write completed
}
data -= size;
for(i=0; i<size; i++)
PRINTF("0x%02x\t", data[i]);
PRINTF("\n\r");
return size;
}
/******************************************************************************
*
* Function Name : M25P32_ReadData
* Comments : This function reads data from memory into given buffer
* Return: Number of bytes read.
*
******************************************************************************/
uint32_t M25P32_ReadData (uint32_t addr, uint32_t size, uint8_t* data)
{
uint8_t Txbuffer[50];
uint32_t i;
PRINTF("Reading %d bytes from location 0x%08x in memory:\n\r", size, addr);
/* Read instruction, address and data */
Txbuffer[0] = SPI_MEMORY_READ_DATA;
for(i=SPI_MEMORY_ADDRESS_BYTES; i; i--)
{
Txbuffer[i] = (uint8_t)(addr & 0xFF);
addr >>= 8;
}
for(i=SPI_MEMORY_ADDRESS_BYTES+1; i<size+SPI_MEMORY_ADDRESS_BYTES+1; i++)
Txbuffer[i] = 0xFF;
/* write instruction */
if(!ECSPI_XFER_TransferBlocking((uint8_t*)Txbuffer, data, size+4))
PRINTF("Read memory data error!\n\r");
for(i=0; i<size; i++)
PRINTF("0x%02x\t", data[i+1+SPI_MEMORY_ADDRESS_BYTES]);
PRINTF("\n\r");
return size;
}
/*******************************************************************************
* EOF
******************************************************************************/
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