| Posted: 02:25pm 13 Mar 2019 |
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Hi,
I am using a Maximite to communicate with a Microchip 25LC512 EEPROM.I need help with the read command.
Writing a byte to it has 4 bytes in the command, first is the command, second & third the address and finally the data byte.
Writing the read command has 3 bytes; first byte is the command,next two bytes are the address. The byte at the address is immediately clocked back but I don't know how to capture the data.
This is my code.
PIN(17)=1 'preset pin17 before it is setup
Setpin 17, DOUT
SPI OPEN 4000000,0,8 '4MHz, Mode 0,8 bits
PIN(17)=0 'chip select low
SPI WRITE 4,2,0,5,8 'write 4 bytes, '2'is write instruction,
' 0005' is the memory location, 8 is data
PIN(17)=1 'CS high
'try to read back
Pause(100)
PIN(17)=0 'CS low
SPI Write 3,3,0,5 'Send the read command to the EEPROM
' Read 3 bytes,the next'3' is read cmd, 0005 is memory location
byte1=SPI(0) 'Trying to get byte from memory
PIN(17)=1
SPI CLOSE
?byte1
The data comes back as 0.
Any suggestions would be appreciated
Thanks
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