LPC MicrocontrollersのトピックRe: LPC1778 rev.2 DMA do not read all data from MCI fifo

LPC1778 rev.2 DMA do not read all data from MCI fifo

lpcware — Wed, 15 Jun 2016 17:59:09 GMT

Content originally posted in LPCWare by megajohn on Mon Mar 18 08:26:03 MST 2013
Hi
Sorry my english
i am modify Fat Chan Example for LPC23xx to my LPC1778
if i am config DMA and MCI for recieve block №0, then i get only 480 bytes. But request 512 bytes. I am search lost 32 bytes in fifo MCI.

Why DMA controller do not read this bytes ?!

All images attach. Green color - bytes transfer ok to my mem, red - bytes transfer fail

Re: LPC1778 rev.2 DMA do not read all data from MCI fifo

lpcware — Wed, 15 Jun 2016 17:59:11 GMT

Content originally posted in LPCWare by megajohn on Mon Mar 18 08:31:17 MST 2013
in one forum one programmer reported that he had received similar trouble on LPC2888 and in errata written "MCI.1 Rx FIFO is not functional"
may be this trouble migration to LPC1778 ?

Re: LPC1778 rev.2 DMA do not read all data from MCI fifo

lpcware — Wed, 15 Jun 2016 17:59:11 GMT

Content originally posted in LPCWare by wmues on Mon Mar 18 09:08:02 MST 2013
DMA on LPC178x MCI is working, no problem.

Biggest Problem is the quality of the mci driver codes....

I am using the following MCI driver, which is working fine:

http://www.lpcware.com/content/forum/lpc1788-mci-problems#comment-1866