山東大學(xué)嵌入式實(shí)驗(yàn)報(bào)告(參考版)
2024-08-14 12:02本頁(yè)面
【正文】 。 首先，在初始化匯編程序中切換至用戶模式，并進(jìn)入中斷模式設(shè)置相應(yīng)指針等；并在匯編中調(diào)用main函數(shù)和中斷函數(shù)。對(duì)寄存器的設(shè)置是通過(guò)位運(yùn)算，先將想要改變的數(shù)值移至相應(yīng)位時(shí)，再通過(guò)與，或，非來(lái)達(dá)到相應(yīng)改變寄存器某一位值的目的。最后退出中斷，清除當(dāng)前中段標(biāo)志位，等待下次中段。首先要對(duì)中段進(jìn)行初始化，并對(duì)端口功能設(shè)定。//%%%%%%%%%%%%%% %%%%%%%%%%%%%%%% /* WOTCH DOG register */define WTCON (*(volatile unsigned long *)0x53000000)/* SDRAM regisers */define MEM_CTL_BASE 0x48000000define SDRAM_BASE 0x30000000/* NAND Flash registers */define NFCONF (*(volatile unsigned int *)0x4e000000)define NFCMD (*(volatile unsigned char *)0x4e000004)define NFADDR (*(volatile unsigned char *)0x4e000008)define NFDATA (*(volatile unsigned char *)0x4e00000c)define NFSTAT (*(volatile unsigned char *)0x4e000010)/*GPIO registers*/define GPBCON (*(volatile unsigned long *)0x56000010)define GPBDAT (*(volatile unsigned long *)0x56000014)define GPFCON (*(volatile unsigned long *)0x56000050)define GPFDAT (*(volatile unsigned long *)0x56000054)define GPFUP (*(volatile unsigned long *)0x56000058)define GPGCON (*(volatile unsigned long *)0x56000060)define GPGDAT (*(volatile unsigned long *)0x56000064)define GPGUP (*(volatile unsigned long *)0x56000068)define GPHCON (*(volatile unsigned long *)0x56000070)define GPHDAT (*(volatile unsigned long *)0x56000074)define GPHUP (*(volatile unsigned long *)0x56000078) /*UART registers*/define ULCON0 (*(volatile unsigned long *)0x50000000)define UCON0 (*(volatile unsigned long *)0x50000004)define UFCON0 (*(volatile unsigned long *)0x50000008)define UMCON0 (*(volatile unsigned
環(huán)評(píng)公示相關(guān)推薦
鄂ICP備17016276號(hào)-1