--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BootLoader/Src/externLogbookFlash_mini.c	Sun Mar 30 21:32:37 2025 +0200
@@ -0,0 +1,872 @@
+/**
+  ******************************************************************************
+	* @copyright heinrichs weikamp
+  * @file    externLogbookFlash.c
+  * @author  heinrichs weikamp gmbh
+  * @date    07-Aug-2014
+  * @version V0.0.4
+  * @since   29-Sept-2015
+  * @brief   Main File to access the new 1.8 Volt Spansion S25FS256S 256 Mbit (32 Mbyte)
+	* @bug
+	* @warning
+  *
+  @verbatim
+  ==============================================================================
+              ##### Logbook Header (TOC) #####
+  ==============================================================================
+  [..] Memory useage:
+	NEW: Spansion S25FS-S256S
+	
+			only 8x 4KB and 1x 32KB, remaining is 64KB or 256KB
+			Sector Size (kbyte) Sector Count Sector Range Address Range (Byte Address) Notes
+			 4   8	SA00  00000000h-00000FFFh 
+								:							:
+							SA07  00007000h-00007FFFh
+
+			32   1  SA08  00008000h-0000FFFFh
+
+			64 511  SA09  00010000h-0001FFFFh
+								: 						:
+							SA519 01FF0000h-01FFFFFFh			
+	OLD:
+				1kB each header
+				with predive header at beginning
+				and postdive header with 0x400 HEADER2OFFSET
+				4kB (one erase) has two dives with 4 headers total
+				total of 512 kB (with 256 header ids (8 bit))
+				Size is 280 Byte (as of 25.Nov. 2014)
+
+	[..] Output to PC / UART is postdive header
+
+	[..] Block Protection Lock-Down is to erase logbook only
+
+	[..] Timing (see page 137 of LOGBOOK_V3_S25FS-S_00-271247.pdf
+				bulk erase is 2 minutes typ., 6 minutes max.
+
+  ==============================================================================
+              ##### DEMOMODE #####
+  ==============================================================================
+	151215: ext_flash_write_settings() is DISABLED!
+	
+	==============================================================================
+              ##### bug fixes #####
+  ==============================================================================
+	150917:	end in header and length of sample was one byte too long 
+					as stated by Jef Driesen email 15.09.2015
+					
+	@endverbatim
+	******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+#include "externLogbookFlash.h"
+#include "ostc.h"
+#include "settings.h"
+#include "gfx_engine.h"
+
+/* Private types -------------------------------------------------------------*/
+#define FLASHSTART 	0x000000
+//#define FLASHSTOP 	0x01FFFFFF all 32 MB with 4byte addressing
+#define FLASHSTOP 	0x00FFFFFF 
+//#define FLASHSTOP 	0x3FFFFF
+#define RELEASE		1
+#define HOLDCS		0
+
+#define HEADER2OFFSET 0x400
+
+typedef enum{
+	EF_HEADER,
+	EF_SAMPLE,
+	EF_DEVICEDATA,
+	EF_VPMDATA,
+	EF_SETTINGS,
+	EF_FIRMWARE,
+	EF_FIRMWARE2,
+}which_ring_enum;
+
+
+typedef struct{
+uint8_t IsBusy:1;
+uint8_t IsWriteEnabled:1;
+uint8_t BlockProtect0:1;
+uint8_t BlockProtect1:1;
+uint8_t BlockProtect2:1;
+uint8_t BlockProtect3:1;
+uint8_t IsAutoAddressIncMode:1;
+uint8_t BlockProtectL:1;
+} extFlashStatusUbit8_t;
+
+typedef union{
+extFlashStatusUbit8_t ub;
+uint8_t uw;
+} extFlashStatusBit8_Type;
+
+
+/* Exported variables --------------------------------------------------------*/
+
+/* Private variables ---------------------------------------------------------*/
+
+static uint32_t	actualAddress = 0;
+static uint32_t	preparedPageAddress = 0;
+static uint32_t closeSectorAddress = 0;
+static uint32_t	actualPointerHeader = 0;
+static uint32_t	actualPointerSample = 0;
+static uint32_t	actualPointerDevicedata = DDSTART;
+static uint32_t	actualPointerVPM = 0;
+static uint32_t	actualPointerSettings = SETTINGSSTART;
+static uint32_t	actualPointerFirmware = 0;
+static uint32_t	actualPointerFirmware2 = 0;
+
+/* Private function prototypes -----------------------------------------------*/
+static void chip_unselect(void);
+static void chip_select(void);
+static void write_spi(uint8_t data, uint8_t unselect_CS_afterwards);
+static uint8_t read_spi(uint8_t unselect_CS_afterwards);
+static void write_address(uint8_t unselect_CS_afterwards);
+static void Error_Handler_extflash(void);
+static void wait_chip_not_busy(void);
+static void ext_flash_incf_address(uint8_t type);
+//void ext_flash_incf_address_ring(void);
+
+static void ext_flash_erase4kB(void);
+static void ext_flash_erase32kB(void);
+static void ext_flash_erase64kB(void);
+static uint8_t ext_flash_erase_if_on_page_start(void);
+
+static void ef_write_block(uint8_t * sendByte, uint32_t length, uint8_t type, uint8_t do_not_erase);
+
+static void ext_flash_read_block(uint8_t *getByte, uint8_t type);
+static void ext_flash_read_block_multi(void *getByte, uint32_t size, uint8_t type);
+static void ext_flash_read_block_stop(void);
+
+static void ef_hw_rough_delay_us(uint32_t delayUs);
+static void ef_erase_64K(uint32_t blocks);
+
+
+/* Exported functions --------------------------------------------------------*/
+
+void ext_flash_write_firmware(uint8_t *pSample1, uint32_t length1)//, uint8_t *pSample2, uint32_t length2)
+{
+	general32to8_Type lengthTransform;
+
+	lengthTransform.u32 = length1;
+	
+	actualPointerFirmware = FWSTART;
+	ef_write_block(lengthTransform.u8,4, EF_FIRMWARE, 1);
+	ef_write_block(pSample1,length1, EF_FIRMWARE, 1);
+
+//	if(length2)
+//		ef_write_block(pSample2,length2, EF_FIRMWARE, 1);
+}
+
+uint8_t ext_flash_read_firmware_version(char *text)
+{
+	uint32_t backup = actualAddress;
+	uint8_t buffer[4];
+	
+	// + 4 for length data, see ext_flash_write_firmware
+	actualAddress = FWSTART + 4 + 0x10000;
+	ext_flash_read_block_start();
+	ext_flash_read_block(&buffer[0], EF_FIRMWARE);
+	ext_flash_read_block(&buffer[1], EF_FIRMWARE);
+	ext_flash_read_block(&buffer[2], EF_FIRMWARE);
+	ext_flash_read_block(&buffer[3], EF_FIRMWARE);
+
+	ext_flash_read_block_stop();
+	actualAddress = backup;
+
+	uint8_t ptr = 0;
+	text[ptr++] = 'V';
+	ptr += gfx_number_to_string(2,0,&text[ptr],buffer[0] & 0x3F);
+	text[ptr++] = '.';
+	ptr += gfx_number_to_string(2,0,&text[ptr],buffer[1] & 0x3F);
+	text[ptr++] = '.';
+	ptr += gfx_number_to_string(2,0,&text[ptr],buffer[2] & 0x3F);
+	text[ptr++] = ' ';
+	if(buffer[3])
+	{
+		text[ptr++] = 'b';
+		text[ptr++] = 'e';
+		text[ptr++] = 't';
+		text[ptr++] = 'a';
+		text[ptr++] = ' ';
+	}
+	return ptr;
+}
+
+
+uint32_t ext_flash_read_firmware(uint8_t *pSample1, uint32_t max_length, uint8_t *magicByte)
+{
+	uint32_t backup = actualAddress;
+	general32to8_Type lengthTransform;
+	
+	actualAddress = FWSTART;
+	ext_flash_read_block_start();
+
+	ext_flash_read_block(&lengthTransform.u8[0], EF_FIRMWARE);
+	ext_flash_read_block(&lengthTransform.u8[1], EF_FIRMWARE);
+	ext_flash_read_block(&lengthTransform.u8[2], EF_FIRMWARE);
+	ext_flash_read_block(&lengthTransform.u8[3], EF_FIRMWARE);
+
+	
+	if(lengthTransform.u32 == 0xFFFFFFFF)
+	{
+		lengthTransform.u32 = 0xFFFFFFFF;
+	}
+	else
+	if(lengthTransform.u32 > max_length)
+	{
+		lengthTransform.u32 = 0xFF000000;
+	}
+	else
+	{
+		for(uint32_t i = 0; i<lengthTransform.u32; i++)
+		{
+			ext_flash_read_block(&pSample1[i], EF_FIRMWARE);
+		}
+		
+	}
+	
+	ext_flash_read_block_stop();
+	
+	if(magicByte)
+	{
+		*magicByte = pSample1[0x10000 + 0x3E]; // 0x3E == 62 
+	}
+	
+	actualAddress = backup;
+	return lengthTransform.u32;
+}
+
+
+void ext_flash_write_firmware2(uint32_t offset, uint8_t *pSample1, uint32_t length1, uint8_t *pSample2, uint32_t length2)
+{
+	general32to8_Type lengthTransform, offsetTransform;
+
+	lengthTransform.u32 = length1 + length2;
+	offsetTransform.u32 = offset;
+	
+	actualPointerFirmware2 = FWSTART2;
+	ef_write_block(lengthTransform.u8,4, EF_FIRMWARE2, 1);
+	ef_write_block(offsetTransform.u8,4, EF_FIRMWARE2, 1);
+	ef_write_block(pSample1,length1, EF_FIRMWARE2, 1);
+	if(length2)
+		ef_write_block(pSample2,length2, EF_FIRMWARE2, 1);
+}
+
+
+uint32_t ext_flash_read_firmware2(uint32_t *offset, uint8_t *pSample1, uint32_t max_length1, uint8_t *pSample2, uint32_t max_length2)
+{
+	uint32_t backup = actualAddress;
+	uint32_t length1, length2;
+	general32to8_Type lengthTransform, offsetTransform;
+
+	actualAddress = FWSTART2;
+	ext_flash_read_block_start();
+
+	ext_flash_read_block(&lengthTransform.u8[0], EF_FIRMWARE2);
+	ext_flash_read_block(&lengthTransform.u8[1], EF_FIRMWARE2);
+	ext_flash_read_block(&lengthTransform.u8[2], EF_FIRMWARE2);
+	ext_flash_read_block(&lengthTransform.u8[3], EF_FIRMWARE2);
+
+	ext_flash_read_block(&offsetTransform.u8[0], EF_FIRMWARE2);
+	ext_flash_read_block(&offsetTransform.u8[1], EF_FIRMWARE2);
+	ext_flash_read_block(&offsetTransform.u8[2], EF_FIRMWARE2);
+	ext_flash_read_block(&offsetTransform.u8[3], EF_FIRMWARE2);
+	
+	*offset = offsetTransform.u32;
+	
+	if(lengthTransform.u32 == 0xFFFFFFFF)
+	{
+		lengthTransform.u32 = 0xFFFFFFFF;
+	}
+	else
+	if(lengthTransform.u32 > max_length1 + max_length2)
+	{
+		lengthTransform.u32 = 0xFF000000;
+	}
+	else
+	{
+		if(lengthTransform.u32 <  max_length1)
+		{
+			length1 = lengthTransform.u32;
+			length2 = 0;
+		}
+		else
+		{
+			length1 = max_length1;
+			length2 = lengthTransform.u32 - max_length1;
+		}
+		
+		if(pSample1)
+		{
+			for(uint32_t i = 0; i<length1; i++)
+			{
+				ext_flash_read_block(&pSample1[i], EF_FIRMWARE2);
+			}
+			if(pSample2)
+			{
+				for(uint32_t i = 0; i<length2; i++)
+				{
+					ext_flash_read_block(&pSample2[i], EF_FIRMWARE2);
+				}
+			}
+		}
+		else if(pSample2)
+		{
+			actualAddress += length1;
+			for(uint32_t i = 0; i<length2; i++)
+			{
+				ext_flash_read_block(&pSample2[i], EF_FIRMWARE2);
+			}
+		}
+	}
+	ext_flash_read_block_stop();
+	actualAddress = backup;
+	return lengthTransform.u32;
+}
+
+
+void ext_flash_read_fixed_16_devicedata_blocks_formated_128byte_total(uint8_t *buffer)
+{
+	SDeviceLine data[16];
+	uint8_t tempLengthIngnore;
+	uint16_t count;
+	uint8_t transfer;
+
+	RTC_DateTypeDef Sdate;
+	RTC_TimeTypeDef Stime;
+	
+	actualAddress = DDSTART;
+
+	ext_flash_read_block_start();
+	ext_flash_read_block(&tempLengthIngnore, EF_DEVICEDATA);
+	ext_flash_read_block(&tempLengthIngnore, EF_DEVICEDATA);
+	
+	ext_flash_read_block_multi((uint8_t *)data,16*3*4, EF_DEVICEDATA);
+	ext_flash_read_block_stop();
+
+	count = 0;
+	for(int i=0;i<16;i++)
+	{
+		transfer = (data[i].value_int32 >> 24) & 0xFF;
+		buffer[count++] = transfer;
+		transfer = (data[i].value_int32 >> 16) & 0xFF;
+		buffer[count++] = transfer;
+		transfer = (data[i].value_int32 >> 8) & 0xFF;
+		buffer[count++] = transfer;
+		transfer = (data[i].value_int32) & 0xFF;
+		buffer[count++] = transfer;
+
+		translateDate(data[i].date_rtc_dr, &Sdate);
+		translateTime(data[i].time_rtc_tr, &Stime);
+		buffer[count++] = Sdate.Year;
+		buffer[count++] = Sdate.Month;
+		buffer[count++] = Sdate.Date;
+		buffer[count++] = Stime.Hours;
+	}
+}
+
+void ext_flash_erase_firmware(void)
+{
+	uint32_t size, blocks_64k;
+
+	actualAddress = FWSTART;
+	size = 1 + FWSTOP - FWSTART;
+	blocks_64k = size / 0x10000;
+	ef_erase_64K(blocks_64k);
+}
+
+void ext_flash_erase_firmware2(void)
+{
+	uint32_t size, blocks_64k;
+
+	actualAddress = FWSTART2;
+	size = 1 + FWSTOP2 - FWSTART2;
+	blocks_64k = size / 0x10000;
+	ef_erase_64K(blocks_64k);
+}
+
+
+
+static void ext_flash_erase4kB(void)
+{
+	wait_chip_not_busy();
+	write_spi(0x06,RELEASE);/* WREN */
+	write_spi(0x20,HOLDCS);/* sector erase cmd */
+	write_address(RELEASE);
+}
+
+/* be careful - might not work with entire family and other products
+ * see page 14 of LOGBOOK_V3_S25FS-S_00-271247.pdf
+ */
+static void ext_flash_erase32kB(void)
+{
+	uint32_t actualAddress_backup;
+	
+	actualAddress_backup = actualAddress;
+	actualAddress = 0;
+	wait_chip_not_busy();
+	write_spi(0x06,RELEASE);/* WREN */
+	write_spi(0xD8,HOLDCS);/* sector erase cmd */
+	write_address(RELEASE);
+	actualAddress = actualAddress_backup;
+}
+
+
+static void ext_flash_erase64kB(void)
+{
+	wait_chip_not_busy();
+	write_spi(0x06,RELEASE);/* WREN */
+	write_spi(0xD8,HOLDCS);/* sector erase cmd */
+	write_address(RELEASE);
+}
+
+
+void ext_flash_read_block_start(void)
+{
+	wait_chip_not_busy();
+	write_spi(0x03,HOLDCS);		/* WREN */
+	write_address(HOLDCS);
+}
+
+/* 4KB, 32KB, 64 KB, not the upper 16 MB with 4 Byte address at the moment */
+static uint8_t ext_flash_erase_if_on_page_start(void)
+{
+	if(actualAddress < 0x00008000)
+	{
+		/* 4K Byte is 0x1000 */
+		if((actualAddress & 0xFFF) == 0)
+		{
+			ext_flash_erase4kB();
+			return 1;
+		}
+	}
+	else
+	if(actualAddress < 0x00010000)
+	{
+		/* 32K Byte is only one page */
+		if(actualAddress == 0x00010000)
+		{
+			ext_flash_erase32kB();
+			return 1;
+		}
+	}
+	else
+	{
+		/* 64K Byte is 0x10000 */
+		if((actualAddress & 0xFFFF) == 0)
+		{
+			if(preparedPageAddress == actualAddress)	/* has page already been prepared before? (at the moment for samples only) */
+			{
+				preparedPageAddress = 0;
+
+			}
+			else
+			{
+				ext_flash_erase64kB();
+			}
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+
+static void ext_flash_read_block(uint8_t *getByte, uint8_t type)
+{
+	*getByte = read_spi(HOLDCS);/* read data */
+	ext_flash_incf_address(type);
+}
+
+
+static void ext_flash_read_block_multi(void *getByte, uint32_t size, uint8_t type)
+{
+	uint8_t  *data;
+	data = getByte;
+
+	for(uint32_t i=0;i<size;i++)
+	{
+		data[i] = read_spi(HOLDCS);/* read data */
+		ext_flash_incf_address(type);
+	}
+}
+
+
+static void ext_flash_read_block_stop(void)
+{
+	chip_unselect();
+}
+
+
+/* Private functions ---------------------------------------------------------*/
+
+static void ef_write_block(uint8_t * sendByte, uint32_t length, uint8_t type, uint8_t do_not_erase)
+{
+	uint32_t remaining_page_size, remaining_length, remaining_space_to_ring_end;
+	uint32_t i=0;
+
+	if(!length)
+		return;
+
+	uint32_t ringStart, ringStop;
+
+	switch(type)
+	{
+		case EF_HEADER:
+			actualAddress = actualPointerHeader;
+			ringStart = HEADERSTART;
+			ringStop = HEADERSTOP;
+			break;
+		case EF_SAMPLE:
+			actualAddress = actualPointerSample;
+			ringStart = SAMPLESTART;
+			ringStop = SAMPLESTOP;
+			break;
+		case EF_DEVICEDATA:
+			actualAddress = actualPointerDevicedata;
+			ringStart = DDSTART;
+			ringStop = DDSTOP;
+			break;
+		case EF_VPMDATA:
+			actualAddress = actualPointerVPM;
+			ringStart = VPMSTART;
+			ringStop = VPMSTOP;
+			break;
+		case EF_SETTINGS:
+			actualAddress = actualPointerSettings;
+			ringStart = SETTINGSSTART;
+			ringStop = SETTINGSSTOP;
+			break;
+		case EF_FIRMWARE:
+			actualAddress = actualPointerFirmware;
+			ringStart = FWSTART;
+			ringStop = FWSTOP;
+			break;
+		case EF_FIRMWARE2:
+			actualAddress = actualPointerFirmware2;
+			ringStart = FWSTART2;
+			ringStop = FWSTOP2;
+			break;
+		default:
+			ringStart = FLASHSTART;
+			ringStop = FLASHSTOP;
+			break;
+	}
+	/* safety */
+	if(actualAddress < ringStart)
+		actualAddress = ringStart;
+
+	if(do_not_erase == 0)
+	{
+		ext_flash_erase_if_on_page_start();
+	}
+	
+	while( i<length)
+	{
+		ef_hw_rough_delay_us(5);
+		wait_chip_not_busy();
+		write_spi(0x06,RELEASE);		/* WREN */
+		write_spi(0x02,HOLDCS);			/* write cmd */
+		write_address(HOLDCS);
+		
+		remaining_length = length - i;
+		remaining_page_size = 0xFF - (uint8_t)(actualAddress & 0xFF) +1;
+		remaining_space_to_ring_end = ringStop - actualAddress;
+		
+		if(remaining_length >= 256)
+		{
+			remaining_length = 255;	/* up to 256 bytes may be written in one burst. Last byte is written with release */
+		}
+		else
+		{
+			remaining_length--;		/* last byte needed for release */
+		}
+		if(remaining_length >= (remaining_page_size) ) /* use 256 byte page and calculate number of bytes left */
+		{
+			remaining_length = remaining_page_size - 1;
+		}
+		if( (remaining_space_to_ring_end >= 256)) 
+		{
+			for(int j=0; j<remaining_length; j++)
+			{
+				write_spi(sendByte[i],HOLDCS);/* write data */
+				actualAddress++;
+				i++;
+			}
+		}
+		/* byte with RELEASE */
+		write_spi(sendByte[i],RELEASE);/* write data */
+		actualAddress++;
+		i++;
+
+		if(actualAddress > ringStop)
+			actualAddress = ringStart;
+
+		if(do_not_erase == 0)
+			ext_flash_erase_if_on_page_start();
+	}
+	switch(type)
+	{
+		case EF_HEADER:
+			actualPointerHeader = actualAddress;
+			break;
+		case EF_SAMPLE:
+			actualPointerSample = actualAddress;
+			break;
+		case EF_DEVICEDATA:
+			actualPointerDevicedata = actualAddress;
+			break;
+		case EF_VPMDATA:
+			actualPointerVPM = actualAddress;
+			break;
+		case EF_SETTINGS:
+			actualPointerSettings = actualAddress;
+			break;
+		case EF_FIRMWARE:
+			actualPointerFirmware = actualAddress;
+			break;
+		case EF_FIRMWARE2:
+			actualPointerFirmware2 = actualAddress;
+			break;
+		default:
+			break;
+	}
+}
+
+
+static void ef_erase_64K(uint32_t blocks)
+{
+	for(uint32_t i = 0; i < blocks; i++)
+	{
+		wait_chip_not_busy();
+		write_spi(0x06,RELEASE);/* WREN */
+		write_spi(0xD8,HOLDCS);/* 64k erase cmd */
+		write_address(RELEASE);
+		actualAddress += 0x10000;
+		HAL_Delay(25);
+	}
+}
+
+static void chip_unselect(void)
+{
+		HAL_GPIO_WritePin(EXTFLASH_CSB_GPIO_PORT,EXTFLASH_CSB_PIN,GPIO_PIN_SET); // chip select
+}
+
+static void chip_select(void)
+{
+	HAL_GPIO_WritePin(EXTFLASH_CSB_GPIO_PORT,EXTFLASH_CSB_PIN,GPIO_PIN_RESET); // chip select
+}
+
+static uint8_t read_spi(uint8_t unselect_CS_afterwards)
+{
+	uint8_t byte;
+
+	chip_select();
+
+	if(HAL_SPI_Receive(&hspiDisplay, &byte, 1, 10000) != HAL_OK)
+		Error_Handler_extflash();
+
+	while (HAL_SPI_GetState(&hspiDisplay) != HAL_SPI_STATE_READY)
+  {
+  }
+	if(unselect_CS_afterwards)
+		chip_unselect();
+
+	return byte;
+}
+
+
+static void write_spi(uint8_t data, uint8_t unselect_CS_afterwards)
+{
+	chip_select();
+
+	if(HAL_SPI_Transmit(&hspiDisplay, &data, 1, 10000) != HAL_OK)
+		Error_Handler_extflash();
+
+	while (HAL_SPI_GetState(&hspiDisplay) != HAL_SPI_STATE_READY)
+  {
+  }
+	if(unselect_CS_afterwards)
+		chip_unselect();
+}
+
+
+static void write_address(uint8_t unselect_CS_afterwards)
+{
+	uint8_t hi, med ,lo;
+
+	hi = (actualAddress >> 16) & 0xFF;
+	med = (actualAddress >> 8) & 0xFF;
+	lo = actualAddress & 0xFF;
+
+	write_spi(hi, HOLDCS);
+	write_spi(med, HOLDCS);
+	write_spi(lo, unselect_CS_afterwards);
+}
+
+
+static void wait_chip_not_busy(void)
+{
+	uint8_t status;
+
+	chip_unselect();
+
+	write_spi(0x05,HOLDCS);		/* RDSR */
+	status = read_spi(HOLDCS);/* read status */
+	while(status & 0x01)
+	{
+		HAL_Delay(1);
+		status = read_spi(HOLDCS);/* read status */
+	}
+	chip_unselect();
+}
+
+
+static void ext_flash_incf_address(uint8_t type)
+{
+	uint32_t ringStart, ringStop;
+	
+	actualAddress += 1;
+	
+	switch(type)
+	{
+		case EF_HEADER:
+			ringStart = HEADERSTART;
+			ringStop = HEADERSTOP;
+			break;
+		case EF_SAMPLE:
+			ringStart = SAMPLESTART;
+			ringStop = SAMPLESTOP;
+			break;
+		case EF_DEVICEDATA:
+			ringStart = DDSTART;
+			ringStop = DDSTOP;
+			break;
+		case EF_VPMDATA:
+			ringStart = VPMSTART;
+			ringStop = VPMSTOP;
+			break;
+		case EF_SETTINGS:
+			ringStart = SETTINGSSTART;
+			ringStop = SETTINGSSTOP;
+			break;
+		case EF_FIRMWARE:
+			ringStart = FWSTART;
+			ringStop = FWSTOP;
+			break;
+		case EF_FIRMWARE2:
+			ringStart = FWSTART2;
+			ringStop = FWSTOP2;
+			break;
+		default:
+			ringStart = FLASHSTART;
+			ringStop = FLASHSTOP;
+			break;
+	}
+	
+	if((actualAddress < ringStart) || (actualAddress > ringStop))
+		actualAddress = ringStart;
+}
+
+static void ef_hw_rough_delay_us(uint32_t delayUs)
+{
+	if(!delayUs)
+		return;
+	delayUs*= 12;
+	while(delayUs--);
+	return;
+}
+
+static void Error_Handler_extflash(void)
+{
+  while(1)
+  {
+  }
+}
+
+void ext_flash_CloseSector(void)
+{
+	uint32_t actualAddressBackup = actualAddress;
+	int i=0;
+
+	if(closeSectorAddress != 0)
+	{
+	/* write some dummy bytes to the sector which is currently used for storing samples. This is done to "hide" problem if function is calles again */
+		actualAddress = closeSectorAddress;
+
+		wait_chip_not_busy();
+		write_spi(0x06,RELEASE);		/* WREN */
+		write_spi(0x02,HOLDCS);			/* write cmd */
+		write_address(HOLDCS);
+		for(i = 0; i<8; i++)
+		{
+			write_spi(0xA5,HOLDCS);/* write data */
+			actualAddress++;
+		}
+		/* byte with RELEASE */
+		write_spi(0xA5,RELEASE);/* write data */
+		actualAddress = actualAddressBackup;
+		closeSectorAddress = 0;
+	}
+}
+
+
+uint8_t ext_flash_erase_firmware_if_not_empty(void)
+{
+	const uint8_t TESTSIZE_FW = 4;
+	
+	uint8_t data[TESTSIZE_FW];
+	uint8_t notEmpty = 0;
+	
+	actualAddress = FWSTART;
+	ext_flash_read_block_start();
+	for(int i = 0; i < TESTSIZE_FW; i++)
+	{
+		ext_flash_read_block(&data[i], EF_FIRMWARE);
+		if(data[i] != 0xFF)
+			notEmpty = 1;
+	}
+	ext_flash_read_block_stop();
+	
+	if(notEmpty)
+	{
+		ext_flash_erase_firmware();
+		return 1;
+	}
+	else
+		return 0;
+}
+
+uint8_t ext_flash_erase_firmware2_if_not_empty(void)
+{
+	const uint8_t TESTSIZE_FW = 4;
+	
+	uint8_t data[TESTSIZE_FW];
+	uint8_t notEmpty = 0;
+	
+	actualAddress = FWSTART2;
+	ext_flash_read_block_start();
+	for(int i = 0; i < TESTSIZE_FW; i++)
+	{
+		ext_flash_read_block(&data[i], EF_FIRMWARE2);
+		if(data[i] != 0xFF)
+			notEmpty = 1;
+	}
+	ext_flash_read_block_stop();
+	
+	if(notEmpty)
+	{
+		ext_flash_erase_firmware2();
+		return 1;
+	}
+	else
+		return 0;
+}