/*
* stm-fpgacfg.c
* ----------
* Functions for accessing the FPGA config memory.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the NORDUnet 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.
*/
#include "stm32f4xx_hal.h"
#include "stm-fpgacfg.h"
SPI_HandleTypeDef hspi_fpgacfg;
int _n25q128_get_wel_flag(void);
int n25q128_check_id()
{
// tx, rx buffers
uint8_t spi_tx[4];
uint8_t spi_rx[4];
// result
HAL_StatusTypeDef ok;
// send READ ID command
spi_tx[0] = N25Q128_COMMAND_READ_ID;
// select, send command & read response, deselect
_n25q128_select();
ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 4, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// parse response (note, that the very first byte was received during the
// transfer of the command byte, so it contains garbage and should
// be ignored here)
if (spi_rx[1] != N25Q128_ID_MANUFACTURER) return 0;
if (spi_rx[2] != N25Q128_ID_DEVICE_TYPE) return 0;
if (spi_rx[3] != N25Q128_ID_DEVICE_CAPACITY) return 0;
// done
return 1;
}
int n25q128_read_page(uint32_t page_offset, uint8_t *page_buffer)
{
// tx buffer
uint8_t spi_tx[4];
// result
HAL_StatusTypeDef ok;
// check offset
if (page_offset >= N25Q128_NUM_PAGES) return 0;
// calculate byte address
page_offset *= N25Q128_PAGE_SIZE;
// prepare READ command
spi_tx[0] = N25Q128_COMMAND_READ_PAGE;
spi_tx[1] = (uint8_t)(page_offset >> 16);
spi_tx[2] = (uint8_t)(page_offset >> 8);
spi_tx[3] = (uint8_t)(page_offset >> 0);
// activate, send command
_n25q128_select();
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
// check
if (ok != HAL_OK) {
_n25q128_deselect();
return 0;
}
// read response, deselect
ok = HAL_SPI_Receive(N25Q128_SPI_HANDLE, page_buffer, N25Q128_PAGE_SIZE, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// done
return 1;
}
int n25q128_write_page(uint32_t page_offset, uint8_t *page_buffer)
{
// tx buffer
uint8_t spi_tx[4];
// result
HAL_StatusTypeDef ok;
// check offset
if (page_offset >= N25Q128_NUM_PAGES) return 0;
// enable writing
spi_tx[0] = N25Q128_COMMAND_WRITE_ENABLE;
// activate, send command, deselect
_n25q128_select();
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 1, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// make sure, that write enable did the job
int wel = _n25q128_get_wel_flag();
if (wel != 1) return 0;
// calculate byte address
page_offset *= N25Q128_PAGE_SIZE;
// prepare PROGRAM PAGE command
spi_tx[0] = N25Q128_COMMAND_PAGE_PROGRAM;
spi_tx[1] = (uint8_t)(page_offset >> 16);
spi_tx[2] = (uint8_t)(page_offset >> 8);
spi_tx[3] = (uint8_t)(page_offset >> 0);
// activate, send command
_n25q128_select();
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
// check
if (ok != HAL_OK) {
_n25q128_deselect();
return 0;
}
// send data, deselect
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, page_buffer, N25Q128_PAGE_SIZE, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// done
return 1;
}
int n25q128_get_wip_flag(void)
{
// tx, rx buffers
uint8_t spi_tx[2];
uint8_t spi_rx[2];
// result
HAL_StatusTypeDef ok;
// send READ STATUS command
spi_tx[0] = N25Q128_COMMAND_READ_STATUS;
// send command, read response, deselect
_n25q128_select();
ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 2, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return -1;
// done
return (spi_rx[1] & 1);
}
int n25q128_erase_sector(uint32_t sector_offset)
{
// tx buffer
uint8_t spi_tx[4];
// result
HAL_StatusTypeDef ok;
// check offset
if (sector_offset >= N25Q128_NUM_SECTORS) return 0;
// enable writing
spi_tx[0] = N25Q128_COMMAND_WRITE_ENABLE;
// select, send command, deselect
_n25q128_select();
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 1, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// make sure, that write enable did the job
int wel = _n25q128_get_wel_flag();
if (wel != 1) return 0;
// calculate byte address
sector_offset *= N25Q128_SECTOR_SIZE;
// send ERASE SUBSECTOR command
spi_tx[0] = N25Q128_COMMAND_ERASE_SECTOR;
spi_tx[1] = (uint8_t)(sector_offset >> 16);
spi_tx[2] = (uint8_t)(sector_offset >> 8);
spi_tx[3] = (uint8_t)(sector_offset >> 0);
// activate, send command, deselect
_n25q128_select();
ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return 0;
// done
return 1;
}
int _n25q128_get_wel_flag(void)
{
// tx, rx buffers
uint8_t spi_tx[2];
uint8_t spi_rx[2];
// result
HAL_StatusTypeDef ok;
// send READ STATUS command
spi_tx[0] = N25Q128_COMMAND_READ_STATUS;
// send command, read response, deselect
_n25q128_select();
ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 2, N25Q128_SPI_TIMEOUT);
HAL_Delay(1);
_n25q128_deselect();
// check
if (ok != HAL_OK) return -1;
// done
return ((spi_rx[1] >> 1) & 1);
}
