From 7ee80bac8e6fb3f696a40f4ac6bb2cc52fda9fef Mon Sep 17 00:00:00 2001
From: Damien <damien.p.george@gmail.com>
Date: Thu, 24 Oct 2013 00:22:27 +0100
Subject: Add support for SD card (not working).

---
 stm/sdio.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 stm/sdio.c

(limited to 'stm/sdio.c')

diff --git a/stm/sdio.c b/stm/sdio.c
new file mode 100644
index 000000000..78488df1f
--- /dev/null
+++ b/stm/sdio.c
@@ -0,0 +1,60 @@
+// TODO
+// make it work with DMA
+
+#include <stdio.h>
+//#include "stm32f4xx_sdio.h"
+#include "stm324x7i_eval_sdio_sd.h"
+#include "misc.h"
+#include "systick.h"
+
+#define BLOCK_SIZE            512 /* Block Size in Bytes */
+
+uint8_t aBuffer_Block_Rx[BLOCK_SIZE];
+
+void sdio_init(void) {
+    SD_Error error = SD_Init();
+    printf("Init: %x\n", error);
+    uint8_t det = SD_Detect();
+    printf("Detc: %x\n", det);
+
+    if (!det) {
+        printf("no card detected\n");
+        SD_PowerOFF();
+        SD_DeInit();
+        return;
+    }
+
+    // read a block!
+    error = SD_ReadBlock(aBuffer_Block_Rx, 512, BLOCK_SIZE);
+    printf("ReadBlock: %d\n", error);
+
+    /*
+    // Check if the Transfer is finished
+    error = SD_WaitReadOperation();
+    printf("WaitReadOp: %d\n", error);
+    */
+
+    uint32_t stc = sys_tick_counter;
+    while (SD_GetStatus() != SD_TRANSFER_OK) {
+        if (sys_tick_has_passed(stc, 2000)) {
+            printf("timeout waiting for read to finish\n");
+            break;
+        }
+    }
+    printf("done!!\n");
+
+    printf("%.16s", aBuffer_Block_Rx);
+
+    /*
+    snprintf((char*)aBuffer_Block_Rx, BLOCK_SIZE, "Here is some data back for you!\nBLOCK_SIZE=%d\n", BLOCK_SIZE);
+    error = SD_WriteBlock(aBuffer_Block_Rx, 512, BLOCK_SIZE);
+    printf("WriteBlock: %d\n", error);
+
+    while (SD_GetStatus() != SD_TRANSFER_OK) {
+    }
+    printf("done writing!\n");
+    */
+
+    SD_PowerOFF();
+    SD_DeInit();
+}
-- 
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