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//-----------------------------------------------------------------------------
// alpha_n25q128.c
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Headers
//-----------------------------------------------------------------------------
#include "stm32f4xx_hal.h"
#include "alpha_n25q128.h"
#include "spi.h"
//-----------------------------------------------------------------------------
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);
}
//-----------------------------------------------------------------------------
// End-of-File
//-----------------------------------------------------------------------------
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