Block Driver. Macroscopic View

spatlou

spatlou

nirmalpg124

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

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