Difference: MassStorage (6 vs. 7)

Revision 72019-01-27 - PeterSchmid

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SHRC GLO R5 B2 SETBIT ; branch if bit set

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< SHR ; bit not set

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> SHL ; bit not set

BR SAVEBIT SETBIT:

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> SHLC

SAVEBIT: PLO R5 GLO R6

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SPI1 CS1

WAIT

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Schematic

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Schematic

Raspberry Pi Zero and EEPROM interface

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< Because of: "A high-to-low transition on the CS pin is required to start an operation and a low-to-high transition is required to end an operation." That means the CS has to be active as long as a read or write process is going on. Therefore the SPI0 CSx can't be used.

eeprom2bin (download tool)

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-e hexadr: end adress in hex (0x1FFFF is default)

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How to get and build the RaspiElf tools

Get the source from the GIT repository (if you have not installed GIT yet, then install it with sudo apt-get install git), type only the bold text after the $ sign:

pi@cosmac:~/elf $ git clone https://github.com/spyren/RaspiElf
Cloning into 'RaspiElf'...
pi@cosmac:~/elf $

Build (compile) from the sources:

pi@cosmac:~/elf $ cd RaspiElf
pi@cosmac:~/elf/RaspiElf $ cd eeprom/
pi@cosmac:~/elf/RaspiElf/eeprom $ make
cc -g -c eeprom2bin.c
cc -g -o eeprom2bin -lwiringPi eeprom2bin.o
cc -g -c bin2eeprom.c
cc -g -o bin2eeprom -lwiringPi bin2eeprom.o
pi@cosmac:~/elf/RaspiElf/eeprom $

Install the binaries into /usr/local/bin

pi@cosmac:~/elf/RaspiElf/eeprom $ sudo make install
install -m 557 eeprom2bin bin2eeprom /usr/local/bin

Install wiringPi (GPIO Interface library for the Raspberry Pi), details see http://wiringpi.com/download-and-install/

Enable the SPI interface

@cosmac:~/elf/RaspiElf/eeprom $ sudo raspi-config

5 Interfacing Options Configure connections to peripherals
P4 SPI Enable/Disable automatic loading of SPI kernel module

Kermit/ZModem

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META FILEATTACHMENT	attachment="raspi-eeprom.png" attr="" comment="" date="1548535017" name="raspi-eeprom.png" path="raspi-eeprom.png" size="25608" user="PeterSchmid" version="2"

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META FILEATTACHMENT	attachment="raspi-eeprom.png" attr="" comment="" date="1548624176" name="raspi-eeprom.png" path="raspi-eeprom.png" size="26456" user="PeterSchmid" version="3"
META FILEATTACHMENT	attachment="raspi-zero-eeprom.jpg" attr="" comment="" date="1548625222" name="raspi-zero-eeprom.jpg" path="raspi-zero-eeprom.jpg" size="206454" user="PeterSchmid" version="1"

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