1. 修改uboot，修改spi4的引脚复用的寄存器MCP2515挂在SPI4上，中断引脚挂在GPIO4_5上，打开/Hi3559AV100R001C02SPC031CP0002/01.software/board/Hi3559AV100_SDK_V2.0.3.1CP0002/osdrv/opensource/uboot/u-boot-2016.11/board/hisilicon/hi3559av100文件夹下的hi3559av100.c，找到board_init，添加以下内容int board_init(void){ DECLARE_GLOBAL_DATA_PTR; gd-bd-bi_arch_number = MACH_TYPE_HI3559AV100; gd-bd-bi_boot_params = CFG_BOOT_PARAMS; boot_flag_init(); writel(0x461, 0x1F0010C8); //spi4 sclk writel(0x461, 0x1F0010CC); //spi4 sdo writel(0x14F1, 0x1F0010D0);//spi4 sdi writel(0x461, 0x1F0010D4); //spi4 csn0 writel(0x461, 0x1F0010D8); //spi4 csn1 return 0;}编译ubootmake CROSS_COMPILE=aarch64-himix100-linux- -j 20make CROSS_COMPILE=aarch64-himix100-linux- u-boot-z.bin