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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-21 22:00:28 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-21 22:00:28 +0000 |
| commit | 5c775298fca577723a497605f0f4dec4df9fa05a (patch) | |
| tree | 42953b95266cf4011d01d1580f5c0eff56518337 /nuttx/TODO | |
| parent | c56a18fb38e4d9d11b6799eef395a6dc667750e7 (diff) | |
| download | px4-nuttx-5c775298fca577723a497605f0f4dec4df9fa05a.tar.gz px4-nuttx-5c775298fca577723a497605f0f4dec4df9fa05a.tar.bz2 px4-nuttx-5c775298fca577723a497605f0f4dec4df9fa05a.zip | |
STM32 SDIO DMA: Ignore DMA FIFO errors; these seem to be bogus. SD multiple block transfers result in CRC errors; avoid them by using smaller FTP buffer sizes
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4410 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/TODO')
| -rw-r--r-- | nuttx/TODO | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/nuttx/TODO b/nuttx/TODO index 44a607ec4..c62e93a1e 100644 --- a/nuttx/TODO +++ b/nuttx/TODO @@ -1,4 +1,4 @@ -NuttX TODO List (Last updated February 12, 2012) +NuttX TODO List (Last updated February 21, 2012) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This file summarizes known NuttX bugs, limitations, inconsistencies with @@ -31,7 +31,7 @@ nuttx/ (2) ARM/LPC313x (arch/arm/src/lpc313x/) (3) ARM/STR71x (arch/arm/src/str71x/) (3) ARM/LM3S6918 (arch/arm/src/lm3s/) - (5) ARM/STM32 (arch/arm/src/stm32/) + (7) ARM/STM32 (arch/arm/src/stm32/) (3) AVR (arch/avr) (0) Intel x86 (arch/x86) (4) 8051 / MCS51 (arch/8051/) @@ -1143,6 +1143,30 @@ o ARM/STM32 (arch/arm/src/stm32/) Status: Open Priority: Medium + Title: F4 SDIO MULTI-BLOCK TRANSFER FAILURES + Description: If you use a large I/O buffer to access the file system, then the + MMCSD driver will perform multiple block SD transfers. With DMA + ON, this seems to result in CRC errors detected by the hardware + during the transfer. Workaround: Use I/O buffers less the 1024 + bytes. + Status: Open + Priority: Medium + + Title: DMA BOUNDARY CROSSING + Description: I see this statement in the reference manual: "The burst + configuration has to be selected in order to respect the AHB protocol, + where bursts must not cross the 1 KB address boundary because the + minimum address space that can be allocated to a single slave + is 1 KB. This means that the 1 KB address boundary should not be crossed + by a burst block transfer, otherwise an AHB error would be generated, + that is not reported by the DMA registers." + + The implication is that there may be some unenforced alignment + requirements for some DMAs. There is nothing in the DMA driver to + prevent this now. + Status: Open + Priority: Low (I am not even sure if this is a problem yet). + o AVR (arch/avr) ^^^^^^^^^^^^^^ |