Increase SPI speed to fCLk/2 after SD card init

raspiduino · Oct 25, 2023 · a3a42ad · a3a42ad
1 parent 5123370
commit a3a42ad
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Showing 2 changed files with 3 additions and 1 deletion.
diff --git a/sdcard.c b/sdcard.c
@@ -61,6 +61,8 @@ uint8_t SD_init()
 
     SD_readOCR(res);
 
+    SPI_init(SPI_MASTER | SPI_2X_FOSC_2 | SPI_MODE_0);
+
     return SD_SUCCESS;
 }
 

diff --git a/sdcard.h b/sdcard.h
@@ -42,7 +42,7 @@
 #define CMD55_MAX_ATTEMPTS      255
 #define SD_ERROR                1
 #define SD_SUCCESS              0
-#define SD_MAX_READ_ATTEMPTS    1563
+#define SD_MAX_READ_ATTEMPTS    3907
 #define SD_READ_START_TOKEN     0xFE
 #define SD_INIT_CYCLES          80
-Original file line number
+Diff line change
@@ Expand Up / @@ -61,6 +61,8 @@ uint8_t SD_init() @@
         SD_readOCR(res);
+        SPI_init(SPI_MASTER | SPI_2X_FOSC_2 | SPI_MODE_0);
         return SD_SUCCESS;
     }
@@ Expand Down @@