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008 Block Device Driver Development
Issues, queries, suggestions or discussion related to Device drivers, block device drivers, Linux based block driver
008 Block Device Driver Development
Block Driver. Macroscopic View
spatlou
January 2018
spatlou
January 2018
nirmalpg124
January 31
UNDERSTANDING THE DATA AND ADDRESS COMPOSITION IN ONE BYTE FORM
Memory and data can be represented in ONE BYTE form using HEXADECIMAL notation
0000 0000 // These are two nibbles - two sets of 4 bit aggregations
= 0x00
// Hexadecimal notation
1111 1111 // These are two nibbles - two sets of 4 bit aggregations
= 0x11
// Hexadecimal notation
hexadecimal notation is generally used for short space notation of representing 8 bit long data or memory representation.
ONE BYTE could entirely be a data value or a memory address also.
It can also be a control signal representation and the next byte could be a data byte or a command byte also.
Like in I2C communication, a sequence of 2 bits can be a control byte then a command or data byte.
0x00 0xAE ( control byte for command "switching of display" command )
0x40 0xFF ( control byte for data "displaying data 0xFF" )
nirmalpg124
May 17
LD [M] /home/nirmal/Documents/newblockdevdrv/blkdd.ko
BTF [M] /home/nirmal/Documents/newblockdevdrv/blkdd.ko
Failed to parse base BTF 'vmlinux': -22
I'm getting this error while building block device driver on ubuntu 22.04 os and gcc 12.3.0
any sol pls
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