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Drop STM32 F2/4 SDIO clock from 24 to 16 MHz. Seems to fix SD accesses on STM3240G-EVAL

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5020 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-08-10 22:42:46 +00:00
parent 7189150b33
commit 850df30e06
5 changed files with 10 additions and 4 deletions
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nuttx/configs/stm3220g-eval/include/board.h
+2 -2
View File
@@ -185,12 +185,12 @@
# define SDIO_MMCXFR_CLKDIV (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif
/* DMA ON: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(0+2)= 24 MHz
/* DMA ON: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)= 16 MHz
* DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)= 12 MHz
*/
#ifdef CONFIG_SDIO_DMA
# define SDIO_SDXFR_CLKDIV (0 << SDIO_CLKCR_CLKDIV_SHIFT)
# define SDIO_SDXFR_CLKDIV (1 << SDIO_CLKCR_CLKDIV_SHIFT)
#else
# define SDIO_SDXFR_CLKDIV (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif
nuttx/configs/stm3240g-eval/include/board.h
+2 -2
View File
@@ -182,12 +182,12 @@
# define SDIO_MMCXFR_CLKDIV (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif
/* DMA ON: HSDIOCLK=48MHz, SDIO_CK=SDIOCLK/(0+2)=24 MHz
/* DMA ON: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)=16 MHz
* DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)=12 MHz
*/
#ifdef CONFIG_SDIO_DMA
# define SDIO_SDXFR_CLKDIV (0 << SDIO_CLKCR_CLKDIV_SHIFT)
# define SDIO_SDXFR_CLKDIV (1 << SDIO_CLKCR_CLKDIV_SHIFT)
#else
# define SDIO_SDXFR_CLKDIV (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif