JZ2440 SDRAM

void sdram_init() {          BWSCON   = 0x22000000;          BANKCON6 =0x18001;          BANKCON7 =0x18001;          REFRESH  = 0x8404F5;          BANKSIZE =0xB1;          MRSRB6   = 0x20;          MR

>>阅读原文<<