at91sam9rl-ek-sdram.gdb
上传用户:jnhtjd
上传日期:2022-07-16
资源大小:403k
文件大小:1k
- # SDRAM initialization script for the AT91SAM9RL
- #------------------------------------------------
- # Configure master clock
- echo Configuring the master clock...n
- # Enable main oscillator
- set *0xFFFFFC20 = 0x00004001
- while ((*0xFFFFFC68 & 0x1) == 0)
- end
- # Set PLL to 200MHz
- set *0xFFFFFC28 = 0x2031BF03
- while ((*0xFFFFFC68 & 0x2) == 0)
- end
- # Select prescaler
- set *0xFFFFFC30 = 0x00000100
- while ((*0xFFFFFC68 & 0x8) == 0)
- end
- # Select master clock
- set *0xFFFFFC30 = 0x00000102
- while ((*0xFFFFFC68 & 0x8) == 0)
- end
- echo Master clock ok.n
- echo Configuring the SDRAM controller...n
- # Enable EBI chip select for the SDRAM
- set *0xFFFFEF20 = 0x2
- # SDRAM configuration
- set *0xFFFFEA08 = 0x85227259
- set *0xFFFFEA00 = 0x1
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x2
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x4
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x3
- set *0x20000000 = 0
- set *0xFFFFEA00 = 0x0
- set *0x20000000 = 0
- set *0xFFFFEA04 = 0x2BC
- echo SDRAM configuration ok.n