TX2440 ARM开发板Uboot移植 (六、实现启动快捷菜单）

1、在common目录下新增cmd_menu.c文件，内容为：

#include <common.h> #include <command.h> static char awaitkey(unsigned long delay, int* error_p) {     int i;     char c;     if (delay == -1) {         while (1) {             if (tstc()) /* we got a key press */                 return getc();         }     }     else {                 for (i = 0; i < delay; i++) {       if (tstc()) /* we got a key press */        return getc();             udelay (10*1000);         }     }     if (error_p)         *error_p = -1;     return 0; } void main_menu_usage(void) {  printf("\r\n######## Hotips TFTP DownLoad for SMDK2440 ########\r\n");  printf("\r\n");  printf("[1] 下载 u-boot.bin       写入 Nand Flash\r\n");  printf("[2] 下载 Linux(uImage)    内核镜像写入 Nand Flash\r\n");  printf("[3] 下载 yaffs2(fs.yaffs) 文件系统镜像写入 Nand Flash\r\n");  printf("[4] 下载 Linux(uImage)    内核镜像到内存并运行\r\n");  printf("[5] 重启设备\r\n");  printf("[q] 退出菜单\r\n");  printf("\r\n");  printf("输入选择: "); } void menu_shell(void) {     char c;     char cmd_buf[200];     while (1)     {       main_menu_usage();       c = awaitkey(-1, NULL);       printf("%c\n", c);       switch (c)       {   case '1':   {           strcpy(cmd_buf, "tftp 0x32000000 u-boot.bin; nand erase 0x0 0x60000; nand write 0x32000000 0x0 0x60000");           run_command(cmd_buf, 0);           break;   }         case '2':         {           strcpy(cmd_buf, "tftp 0x32000000 uImage; nand erase 0x80000 0x200000; nand write 0x32000000 0x80000 0x200000");           run_command(cmd_buf, 0);      break;         }         case '3':         {           strcpy(cmd_buf, "tftp 0x32000000 fs.yaffs; nand erase 0x280000; nand write.yaffs2 0x32000000 0x280000 $(filesize)");           run_command(cmd_buf, 0);           break;         }   case '4':         {           strcpy(cmd_buf, "tftp 0x32000000 uImage; bootm 0x32000000");           run_command(cmd_buf, 0);           break;         }   case '5':         {           strcpy(cmd_buf, "reset");           run_command(cmd_buf, 0);           break;         }         case 'q':         {           return;               break;         }       }     } } int do_menu (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) {     menu_shell();     return 0; } U_BOOT_CMD(  menu, 1, 0, do_menu,  "Download Menu",  "U-boot Download Menu by Hotips\n" );

2、修改common目录下的Makefile文件,将cmd_menu.o加入编译：

COBJS-y += main.o COBJS-y += cmd_menu.o COBJS-y += ACEX1K.o