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FS#10729 - AMS Sansa: Use 4bit Widebus mode for SD transfers.
Attached to Project:
Rockbox
Opened by Jack Halpin (FlynDice) - Tuesday, 27 October 2009, 14:36 GMT+2
Last edited by Jack Halpin (FlynDice) - Sunday, 13 December 2009, 22:12 GMT+2
Opened by Jack Halpin (FlynDice) - Tuesday, 27 October 2009, 14:36 GMT+2
Last edited by Jack Halpin (FlynDice) - Sunday, 13 December 2009, 22:12 GMT+2
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DetailsThis patch attempts to use the 4 bit widebus mode for the uSD card. Right now we have the cards operating in single bit bus mode. With this patch I can browse files on the uSD and display album art from the card but playback will not work and I'm not sure why. I'm not getting any transfer error messages, it's just hanging on playback. I'm thinking that the bus being 4 times as wide is filling the FIFO quicker and perhaps introducing some kind of timing issue? What do you think?
4_bit_bus.patch
(1.6 KiB)
b/firmware/target/arm/as3525/ata_sd_as3525.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) |
This task depends upon
Closed by Jack Halpin (FlynDice)
Sunday, 13 December 2009, 22:12 GMT+2
Reason for closing: Fixed
Additional comments about closing: Fixed with r23977
Sunday, 13 December 2009, 22:12 GMT+2
Reason for closing: Fixed
Additional comments about closing: Fixed with r23977