Component: EEPROM (Storage)

Author	Matrix Ltd
Version	1.2
Category	Storage

EEPROM component

A means of reading data from and writing data to the EEPROM memory onboard the microcontroller. Fully functional with simulation but the target microcontroller must have EEPROM memory available to allow compilation to work.

Detailed description

No detailed description exists yet for this component

Examples

The Console window can be used to show the contents of EE memory during simulation.

Read and Write Bytes

Reads a value from location 0 in the EEPROM and writes back the value incremented by one, the values are displayed on to a LCD.

Starting and stopping the simulation or resetting the microcontroller will allow the program to resume counting from where it left off as opposed to a standard RAM based variable which would reset to an undetermined value. EEPROM

Read and Write Ints

Reads a value from locations 0,1 in the EEPROM and writes back the value incremented by one, the values are displayed on to a LCD.

Starting and stopping the simulation or resetting the microcontroller will allow the program to resume counting from where it left off as opposed to a standard RAM based variable which would reset to an undetermined value. EEPROM_INT

String variables in EE Memory

Example showing how to store and retrieve strings to and from the EEPROM memory. EEStrings

Downloadable macro reference

	WriteFloat
Writes a 32-bit float value starting at the specified address. A 32-bit float will consume 4 bytes which will be 4 locations on an 8-bit device or 2 locations on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- FLOAT	Value
Floating point value to write
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- VOID	Return

	ReadInt
Reads a 16-bit int value starting from the specified address. A 16-bit int will consume 2 bytes which will be 2 locations on an 8-bit device or 1 location on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- UINT	Return

	ReadFloat
Reads a 32-bit float value starting from the specified address. A 32-bit float will consume 4 bytes which will be 4 locations on an 8-bit device or 2 locations on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- FLOAT	Return

	WriteByte
Writes a 8-bit byte value to the specified address. A 8-bit byte will consume 1 bytes which will be 1 locations on an 8-bit device or half a location on a 16-bit device.
- UINT	ByteAddress
Byte address, EEADDR on 8-bit device or EEADDR/2 on a 16-bit device
- BYTE	Value
Floating point value to write
- VOID	Return

	WriteInt
Writes a 16-bit int value starting at the specified address. A 16-bit int will consume 2 bytes which will be 2 locations on an 8-bit device or 1 location on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- UINT	Value
Floating point value to write
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- VOID	Return

	ReadString
Reads a string of data from the EE memory starting at the specified address. 8-bit EE memory stores a character into each memory location. 16-bit EE memory stores two characters into each memory location.
- UINT	StartAddress
EE Address of the first character in the string
- BYTE	MaxChars
The maximum number of characters to try and read plus null termination
- STRING	Return

	Read
Reads a packet of bits from the EEPROM The number of bits read is 8 or 16, depending on the platform
- UINT	Address
The address, in elements, to read the data from
- UINT	Return

	ReadLong
Reads a 32-bit long value starting from the specified address. A 32-bit long will consume 4 bytes which will be 4 locations on an 8-bit device or 2 locations on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- ULONG	Return

	WriteString
Writes a string of data to the EE memory starting at the specified address. 8-bit EE memory stores a character into each memory location. 16-bit EE memory stores two characters into each memory location.
- UINT	StartAddress
EE Address of the first character in the string
- BYTE	MaxChars
The maximum number of characters to try and read plus null termination
- STRING	DataString
- VOID	Return

	Write
Writes a packet of bits from the EEPROM The number of bits written is 8 or 16, depending on the platform
- UINT	Address
The address, in elements, to write the data to
- UINT	Value
The 8 or 16 bit value to store in EEPROM
- VOID	Return

	ReadByte
Reads a 8-bit byte value starting from the specified address. A 8-bit byte will consume 1 byte which will be 1 locations on an 8-bit device or half a location on a 16-bit device.
- UINT	ByteAddress
Byte address, EEADDR on 8-bit device or EEADDR/2 on a 16-bit device
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- BYTE	Return

	WriteLong
Writes a 32-bit long value starting at the specified address. A 32-bit long will consume 4 bytes which will be 4 locations on an 8-bit device or 2 locations on a 16-bit device.
- UINT	StartAddress
Initial EE location to start reading
- ULONG	Value
Floating point value to write
- BOOL	MSBFirst
0=LSB First, 1=MSB First
- VOID	Return

Property reference

	Properties
	EE Size
Number of memory locations available in EEPROM onboard the target microcontroller.
	EE Bit Depth
Number of bits in each EEPROM memory location onboard the target microcontroller.
	Initial Values
Comma seperated list of values to assign to the EEPROM memory while programming the device. The simulation will automatically load these values into the simulated EE locations on simulation start. Leave blank to remove initialisation code from the compiled C code Supported Formats Decimal 0 - 255 Hexadecimal 0x00 - 0xFF ASCII character 'x' Strings "text"
	Reset To Defaults
Decides what to do on a simulation start event. Siim data will reset to initial values after reloading project or changing initial values property. Yes: Resets the contents of the EEPROM data to the initial values. No: EEPROM contents will be retained between simulations.
	Connections
	Simulations