diff options
Diffstat (limited to 'stm32-sdram.h')
| -rw-r--r-- | stm32-sdram.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/stm32-sdram.h b/stm32-sdram.h new file mode 100644 index 0000000..2e4361c --- /dev/null +++ b/stm32-sdram.h @@ -0,0 +1,43 @@ +//-----------------------------------------------------------------------------
+// stm32-sdram.h
+//-----------------------------------------------------------------------------
+
+
+//-----------------------------------------------------------------------------
+// Defined Values
+//-----------------------------------------------------------------------------
+
+ /* Base Addresses */
+#define SDRAM_BASEADDR_CHIP1 ((uint32_t *)0xC0000000)
+#define SDRAM_BASEADDR_CHIP2 ((uint32_t *)0xD0000000)
+
+ /* Memory Size */
+#define SDRAM_SIZE 0x4000000 // 64 MBytes (512 Mbits)
+
+ /* Mode Register Bits */
+#define SDRAM_MODEREG_BURST_LENGTH_1 ((uint16_t)0x0000)
+#define SDRAM_MODEREG_BURST_LENGTH_2 ((uint16_t)0x0001)
+#define SDRAM_MODEREG_BURST_LENGTH_4 ((uint16_t)0x0002)
+#define SDRAM_MODEREG_BURST_LENGTH_8 ((uint16_t)0x0004)
+
+#define SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL ((uint16_t)0x0000)
+#define SDRAM_MODEREG_BURST_TYPE_INTERLEAVED ((uint16_t)0x0008)
+
+#define SDRAM_MODEREG_CAS_LATENCY_2 ((uint16_t)0x0020)
+#define SDRAM_MODEREG_CAS_LATENCY_3 ((uint16_t)0x0030)
+
+#define SDRAM_MODEREG_OPERATING_MODE_STANDARD ((uint16_t)0x0000)
+
+#define SDRAM_MODEREG_WRITEBURST_MODE_PROGRAMMED ((uint16_t)0x0000)
+#define SDRAM_MODEREG_WRITEBURST_MODE_SINGLE ((uint16_t)0x0200)
+
+
+//-----------------------------------------------------------------------------
+// Prototypes
+//-----------------------------------------------------------------------------
+int sdram_init(SDRAM_HandleTypeDef *sdram1, SDRAM_HandleTypeDef *sdram2);
+
+
+//-----------------------------------------------------------------------------
+// End-of-File
+//-----------------------------------------------------------------------------
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