fix SD_SPI_HIGH_CLOCK_RATE

The Full-Speed card supports SPI, 1-bit SD and the 4-bit SD transfer modes at the full clock range of 0-25MHz
2019-07-17 15:45:18 +08:00 · 2019-07-17 15:45:18 +08:00 · f4d3bd987f
parent 23b7e046d7
commit f4d3bd987f
1 changed files with 1 additions and 1 deletions
--- a/lib/drivers/src/storage/sdcard.cpp
+++ b/lib/drivers/src/storage/sdcard.cpp
@ -50,7 +50,7 @@ using namespace sys;
 #define SD_CMD59 59 /*!< CMD59 = 0x59 */

 #define SD_SPI_LOW_CLOCK_RATE 200000U
-#define SD_SPI_HIGH_CLOCK_RATE 40000000U
+#define SD_SPI_HIGH_CLOCK_RATE 20000000U
 #define SPI_SLAVE_SELECT 3

 /**