diff options
Diffstat (limited to 'nuttx/configs/stm3210e-eval/include/board.h')
| -rwxr-xr-x | nuttx/configs/stm3210e-eval/include/board.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/nuttx/configs/stm3210e-eval/include/board.h b/nuttx/configs/stm3210e-eval/include/board.h index c753d0650..4792ab6af 100755 --- a/nuttx/configs/stm3210e-eval/include/board.h +++ b/nuttx/configs/stm3210e-eval/include/board.h @@ -45,6 +45,7 @@ # include <sys/types.h> #endif #include "stm32_rcc.h" +#include "stm32_sdio.h" #include "stm32_internal.h" /************************************************************************************ @@ -89,6 +90,36 @@ #define STM32_CFGR_USBPRE 0 +/* SDIO dividers. Note that slower clocking is required when DMA is disabled + * in order to avoid RX overrun/TX underrun errors due to delayed responses + * to service FIFOs in interrupt driven mode. These values have not been + * tuned!!! + * + * HCLK=72MHz, SDIOCLK=72MHz, SDIO_CK=HCLK/(178+2)=400 KHz + */ + +#define SDIO_INIT_CLKDIV (178 << SDIO_CLKCR_CLKDIV_SHIFT) + +/* DMA ON: HCLK=72 MHz, SDIOCLK=72MHz, SDIO_CK=HCLK/(2+2)=18 MHz + * DMA OFF: HCLK=72 MHz, SDIOCLK=72MHz, SDIO_CK=HCLK/(3+2)=14.4 MHz + */ + +#ifdef CONFIG_SDIO_DMA +# define SDIO_MMCXFR_CLKDIV (2 << SDIO_CLKCR_CLKDIV_SHIFT) +#else +# define SDIO_MMCXFR_CLKDIV (3 << SDIO_CLKCR_CLKDIV_SHIFT) +#endif + +/* DMA ON: HCLK=72 MHz, SDIOCLK=72MHz, SDIO_CK=HCLK/(1+2)=24 MHz + * DMA OFF: HCLK=72 MHz, SDIOCLK=72MHz, SDIO_CK=HCLK/(3+2)=14.4 MHz + */ + +#ifdef CONFIG_SDIO_DMA +# define SDIO_SDXFR_CLKDIV (1 << SDIO_CLKCR_CLKDIV_SHIFT) +#else +# define SDIO_SDXFR_CLKDIV (3 << SDIO_CLKCR_CLKDIV_SHIFT) +#endif + /* LED definitions ******************************************************************/ /* The STM3210E-EVAL board has 4 LEDs that we will encode as: */ |