Align buffers for DMA transfers - Githubissues

analogdevicesinc / no-OS

Software drivers in C for systems without an operating system

http://analogdevicesinc.github.io/no-OS/

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Align buffers for DMA transfers #2317

Closed danmois closed 2 months ago

danmois commented 2 months ago

Pull Request Description

Address Alignment

Software must program the SRC_ADDRESS and DEST_ADDRESS registers to be multiple of the corresponding MM data bus. The following conditions must hold:

SRC_ADDRESS MOD (DMA_DATA_WIDTH_SRC/8) == 0
DEST_ADDRESS MOD (DMA_DATA_WIDTH_DEST/8) == 0

https://wiki.analog.com/resources/fpga/docs/axi_dmac

PR Type

[x] Bug fix (change that fixes an issue)
[ ] New feature (change that adds new functionality)
[ ] Breaking change (has dependencies in other repos or will cause CI to fail)

PR Checklist

[x] I have followed the Coding style guidelines
[x] I have performed a self-review of the changes
[x] I have commented my code, at least hard-to-understand parts
[x] I have build all projects affected by the changes in this PR
[x] I have tested in hardware affected projects, at the relevant boards
[x] I have signed off all commits from this PR
[x] I have updated the documentation (wiki pages, ReadMe etc), if applies

danmois commented 2 months ago

V2

fix alignment condition

danmois commented 2 months ago

V3

astyle

danmois commented 2 months ago

V4

fix parentheses in if clause