On unix (and all of it's derivatives, everything is a file, including
connections to other systems. You can treat it like a file, and in
(most) circumstances, it will operate just as if it were a local file.
Some devices require special handling, but for the most part, if it's
listed as a file on the system, you can read it as one.
Of course, permissions apply, so creating files or reading them may be
limited by user/group permissions, so there's no guarantee that just
because the file is there, you'll be able to read it.
On 4/1/2023 3:56 PM, Bo Berglund via fpc-pascal wrote:
I need to read and write data to an EEPROM connected by I2C on a RaspberryPi4.
The I2C channel is found in /dev as i2c-1:
$ ll /dev/i2*
crw-rw---- 1 root i2c 89, 1 2019-02-14 11:12 /dev/i2c-1
In this channel the EEPROM CAT24C128 is at address 0x50
The data on the device is organized as 256 pages of 64 bytes data each AFAIU.
I can check the EEPROM using i2c-tools, which I have installed, but I am unsure
if the read is correct...
Question:
Can I use Linux file system commands to read/write the data on the i2c EEPROM
memory device and if so how from fpc?
I have installed the current versions of Lazarus and Fpc on the RPi4 itself.
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