Maxim Integrated 71M6541 Demo Board - Manual (Page 11)

71M6541 Demo Board REV 3.0 User’s Manual
11 Rev 4.0
1.8.1 SERIAL COMMAND LANGUAGE
The Demo Code residing in the flash memory of the 71M6541 provides a convenient way of examining and
modifying key meter parameters via its command line interface (CLI).
The tables in this chapter describe the commands in detail.
Commands for CE Data Access:
] CE DATA ACCESS Comment
Description: Allows user to read from and write to CE data space.
Usage: ] [Starting CE Data Address] [option]…[option]
Command
combinations: ]A??? Read consecutive 16-bit words in Decimal, starting at ad-
dress A
]A$$$ Read consecutive 16-bit words in Hex, starting at address A
]A=n=n Write consecutive memory values, starting at address A
Example: ]40$$$ Reads CE data words 0x40, 0x41 and 0x42.
]7E=1AD2=9A23 Writes two hexadecimal words starting @ 0x7E
]10=+16384 Writes one decimal word starting @ 0x10
All CE data words are in 4-byte (32-bit) format. Typing ]A? will access the 32-bit word located at the byte ad-
dress 0x0000 + 4 * A = 0x1028.
Commands for MPU/XDATA Access:
) MPU DATA ACCESS Comment
Description: Allows user to read from and write to MPU data space.
Usage: ) [Starting MPU Data Address] [option]…[option]
Command
combinations: )A??? Read three consecutive 32-bit words in Decimal, starting at
address A
)A$$$ Read three consecutive 32-bit words in Hex, starting at ad-
dress A
)A=n=m Write the values n and m to two consecutive addresses start-
ing at address A
?) Display useful RAM addresses.
Example: )08$$$$ Reads data words 0x08, 0x0C, 0x10, 0x14
)04=FFFFAD2=9A23 Writes two hexadecimal words starting @ 0x04
)04=+1000 Writes decimal 1,000 to address 0x04
)04=-1000 Writes decimal -1,000 to address 0x04
MPU or XDATA space is the address range for the MPU XRAM (0x0000 to 0xFFF). All MPU data words are in 4-byte (32-bit)
format. Typing ]A? will access the 32-bit word located at the byte address 4 * A = 0x28. The energy accumulation registers of
the Demo Code can be accessed by typing two Dollar signs (“$$”), typing question marks will display negative decimal values
if the most significant bit is set.