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2024-09-26 22:32:20 +08:00
commit 097089ef4e
323 changed files with 135661 additions and 0 deletions
@@ -0,0 +1,152 @@
+#include "EEprom_M24C64.h"
+
+
+
+
+#define EEP_M24C64_BYTES_PER_SECTOR (32)  //bytes per sector
+#define WRITE_NEED_TIME (7)  //datasheet shows  Byte Write within 5 ms 
+
+
+
+bool EEprom_M24C64_init(EEprom_M24C64_t *eep, const char *name, I2C_DEV_t *dev)
+{
+	eep->name = name;
+	eep->_dev = dev;
+
+	return true;
+}
+
+
+bool EEprom_M24C64_read(EEprom_M24C64_t *eep, uint16_t offset,  uint8_t* Buf, uint16_t Size)
+{
+	uint16_t AddrStart 	= offset;
+	uint16_t AddrEnd		= 0;
+
+	uint16_t SectorTemp	= 0;
+	uint16_t SectorStart	= 0;
+	uint16_t SectorEnd	= 0;
+
+	uint8_t* BufPtr = Buf;
+	uint16_t SizeRead = Size;
+	
+	if(0 == Size)
+		return false;
+
+	AddrEnd = AddrStart + Size - 1;
+	SectorStart = AddrStart/EEP_M24C64_BYTES_PER_SECTOR;
+	SectorEnd = AddrEnd/EEP_M24C64_BYTES_PER_SECTOR;
+
+	if( SectorStart == SectorEnd )  //if all data in one sector
+	{
+		if(!I2C_DEV_read_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeRead))
+		{
+			return false;
+		}
+	}
+	else  //if data in multi sector
+	{
+		//except the last sector
+		for( SectorTemp = SectorStart; SectorTemp < SectorEnd; SectorTemp++ )
+		{
+			SizeRead = (SectorTemp+1)*EEP_M24C64_BYTES_PER_SECTOR - AddrStart;
+			if(!I2C_DEV_read_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeRead))
+			{
+				return false;
+			}
+			BufPtr += SizeRead;
+			AddrStart += SizeRead;
+		}
+
+		//the last sector
+		SizeRead = AddrEnd - AddrStart + 1;
+		if(!I2C_DEV_read_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeRead))
+		{
+			return false;
+		}
+	}
+	return true;
+}
+
+
+
+bool EEprom_M24C64_write(EEprom_M24C64_t *eep, uint16_t Addr, uint8_t* Buf, uint16_t Size)
+{
+	
+	uint16_t AddrStart 	= Addr;
+	uint16_t AddrEnd		= 0;
+
+	uint16_t SectorTemp	= 0;
+	uint16_t SectorStart	= 0;
+	uint16_t SectorEnd	= 0;
+
+	uint8_t* BufPtr = Buf;
+	uint16_t SizeWrite = Size;
+	
+	if(0 == Size)
+		return false;
+
+	AddrEnd = AddrStart + Size - 1;
+	SectorStart = AddrStart/EEP_M24C64_BYTES_PER_SECTOR;
+	SectorEnd = AddrEnd/EEP_M24C64_BYTES_PER_SECTOR;
+
+	if( SectorStart == SectorEnd )  //if all data in one sector
+	{
+		if(!I2C_DEV_write_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeWrite))
+		{
+			return false;
+		}
+	}
+	else  //if data in multi sector
+	{
+		//except the last sector
+		for( SectorTemp = SectorStart; SectorTemp < SectorEnd; SectorTemp++ )
+		{
+			SizeWrite = (SectorTemp+1)*EEP_M24C64_BYTES_PER_SECTOR - AddrStart;
+			if(!I2C_DEV_write_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeWrite))
+			{
+				return false;
+			}
+			BufPtr += SizeWrite;
+			AddrStart += SizeWrite;
+			osDelay(WRITE_NEED_TIME);  //datasheet shows  Byte Write within 5 ms 
+		}
+
+		//the last sector
+		SizeWrite = AddrEnd - AddrStart + 1;
+		if(!I2C_DEV_write_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, BufPtr, SizeWrite))
+		{
+			return false;
+		}
+	}
+	osDelay(WRITE_NEED_TIME);
+	return true;
+}
+
+/** clear sector from 0sector to end_sector */
+bool EEprom_M24C64_clear_sector(EEprom_M24C64_t *eep, uint32_t end_sector)
+{
+	uint8_t ClearBuf[EEP_M24C64_BYTES_PER_SECTOR] = {0xff};
+	uint16_t AddrStart 	= 0;
+	
+	memset(ClearBuf, 0 ,EEP_M24C64_BYTES_PER_SECTOR);
+
+	for(uint16_t i = 0; i < end_sector; i++)//M24C64 has 256 sectors
+	{
+		if(!I2C_DEV_write_mem(eep->_dev, AddrStart, I2C_MEMADD_SIZE_16BIT, ClearBuf, EEP_M24C64_BYTES_PER_SECTOR))
+		{
+			return false;
+		}
+		AddrStart += EEP_M24C64_BYTES_PER_SECTOR;
+		osDelay(WRITE_NEED_TIME);  //datasheet shows  Byte Write within 5 ms 
+	}
+
+	return true;
+	
+}
+
+
+
+
+
+/*********END OF FILE****/
+