usb-firewall-fork

Commit Graph

Author	SHA1	Message	Date
Robert Fisk	2e3293e84f	Increase SPI interface speed 4x, to 5.25Mbps. Required modifications to SPI peripheral library. At this speed SPI requires ~60% CPU time at -Og optimisation level. This could be further improved by trimming down the SPI interrupt. But... Speed is now limited by Downstream's single-packet-per-URB restriction, to about 460kB/s. USB Middleware does not implement TX FIFO empty interrupt, so a bit of work is required here.	9 years ago
Robert Fisk	b9cc31d036	Crazy hardware issues, about to revert Upstream SPI from DMA to interrupt transfers	9 years ago
Robert Fisk	55c8a21aad	Initial commit of Downstream template project.	9 years ago

Author

SHA1

Message

Date

Robert Fisk

2e3293e84f

Increase SPI interface speed 4x, to 5.25Mbps. Required modifications to

SPI peripheral library. At this speed SPI requires ~60% CPU time at -Og
optimisation level. This could be further improved by trimming down the
SPI interrupt. But...

Speed is now limited by Downstream's single-packet-per-URB restriction,
to about 460kB/s. USB Middleware does not implement TX FIFO empty
interrupt, so a bit of work is required here.

Robert Fisk

b9cc31d036

Crazy hardware issues, about to revert Upstream SPI from DMA to

interrupt transfers

Robert Fisk

55c8a21aad

Initial commit of Downstream template project.

3 Commits (2e3293e84f788849b0c22435129e9f78d1297e68)