WhyCan Forum(哇酷开发者社区)

感谢，已经想明白了，之前是不知道系统里需要export的gpio的号，现在看明白了

解决了，一两句也说不清楚，慢慢摸索出来的，跟应用场景有关
1、bmp命令是在uboot的 menuconfig里可以配置的；
2、git上的r3 down下来的源码中uboot的env在调用bmp_display的时候变量名有点问题 （TF卡启动时是 mmcx，这里少了个x，x是0还是1，忘记了）；
3、TF启动时的加载bmp到内存的地址似乎不太合适，是要换到后面点；
4、原始的 splash.bmp的格式，并不能用bmp_display打开显示；
5、uboot中要显示还需要加个宏
在 uboot/include/configs/suniv.h 中加入两个宏定义：
#define CONFIG_VIDEO_LOGO
#define CONFIG_VIDEO_BMP_LOGO

下面的env我只是加载了logo.dat文件的内容，并没有显示，因为我准备在kernel中再显示，并且logo.dat的格式是我自定义，但是关于bmp的问题这里已经修改了
mmc_kernel=kernel.itb
mmc_splash=logo.dat
mmc_ubootpart=1
mmc_bootpart=2
mmc_rootpart=3

nand_size=0x8000000
nand_splash_offset=0x80000
nand_kernel_offset=0x100000
nand_kernel_length=0x500000

sf_size=0x1000000
sf_splash_offset=0x80000
sf_kernel_offset=0x100000
sf_kernel_length=0x500000

splash_addr=0x80000000
splash_length=0x80000
mmc_splash_addr=0x81E00000

kernel_addr_r=0x81000000

bootm_size=0x1800000

stderr=serial
stdin=serial
stdout=serial

boot_slot_0=empty
boot_slot_1=empty
scan_boot_slot_0=if mmc dev 0; then setenv boot_slot_0 mmc0; fi;
scan_boot_slot_1=if mmc dev 1; then setenv boot_slot_1 mmc1; else if sf probe; then setenv boot_slot_1 spi-nor; else if mtd list; then setenv boot_slot_1 spi-nand; fi; fi; fi;
scan_boot_slot=run scan_boot_slot_0; run scan_boot_slot_1; echo "========================="; echo "Boot Device: ${boot_device}"; echo "Boot Slot 0: ${boot_slot_0}"; echo "Boot Slot 1: ${boot_slot_1}"; echo "=========================";

dfu_wait_timeout=3
mmc_dfu_info=setenv dfu_alt_info "all raw 0x0 0x37000;u-boot raw 0x10 0x7f0;boot part ${dfu_mmc_dev} ${mmc_bootpart};rom part ${dfu_mmc_dev} ${mmc_rootpart};kernel fat ${dfu_mmc_dev} ${mmc_bootpart}"
nand_dfu_info=setenv dfu_alt_info "all raw 0x0 ${nand_size};u-boot raw 0x0 0x80000;kernel raw ${nand_kernel_offset} ${nand_kernel_length};rom raw 0x600000 0x2a00000;vendor raw 0x3000000 0x1000000"
nor_dfu_info=setenv dfu_alt_info "all raw 0x0 ${sf_size};u-boot raw 0x0 0x80000;kernel raw ${sf_kernel_offset} ${sf_kernel_length};rom raw 0x600000 0x700000"
dfu_mmc=mmc dev ${dfu_mmc_dev}; run mmc_dfu_info; dfu 0 mmc ${dfu_mmc_dev} ${dfu_wait_timeout};
dfu_nand=run nand_dfu_info; dfu 0 mtd spi-nand0 ${dfu_wait_timeout};
dfu_nor=run nor_dfu_info; dfu 0 sf 0:0 ${dfu_wait_timeout};
dfu_boot=if test "${boot_slot_1}" = "spi-nand"; then echo "DFU waiting on SPI-NAND..."; run dfu_nand; fi; if test "${boot_slot_1}" = "spi-nor"; then echo "DFU waiting on SPI-NOR..."; run dfu_nor; fi; if test "${boot_slot_1}" = "mmc1"; then echo "DFU waiting on MMC1..."; setenv dfu_mmc_dev 1; run dfu_mmc; fi; if test "${boot_slot_1}" = "empty" && test "${boot_slot_0}" = "mmc0"; then echo "DFU waiting on MMC0..."; setenv dfu_mmc_dev 0; run dfu_mmc; fi;

fel_boot=echo "Booting from FEL..."; bootm ${kernel_addr_r};
mmc_boot=mmc dev ${devnum}; echo "Booting from MMC${devnum}..."; load mmc ${devnum}:${mmc_bootpart} $kernel_addr_r ${mmc_kernel}; bootm ${kernel_addr_r};
nor_nand_boot=if test "${boot_slot_1}" = "spi-nor"; then run nor_boot; fi; if test "${boot_slot_1}" = "spi-nand"; then run nand_boot; fi;
nor_boot=echo "Booting from SPI-NOR..."; sf probe; sf read ${kernel_addr_r} ${sf_kernel_offset} ${sf_kernel_length}; bootm ${kernel_addr_r};
nand_boot=echo "Booting from SPI-NAND..."; mtd read spi-nand0 ${kernel_addr_r} ${nand_kernel_offset} ${nand_kernel_length}; bootm ${kernel_addr_r};

bootcmd_fel=if test "${boot_device}" = "fel"; then run fel_boot; fi;
bootcmd_dfu=if test "${boot_device}" != "mmc0" || test "${boot_slot_1}" = "empty"; then run dfu_boot; fi;
bootcmd_mmc0=if test "${boot_device}" = "mmc0"; then devnum=0; run mmc_boot; fi;
bootcmd_mmc1=if test "${boot_device}" = "mmc1"; then devnum=1; run mmc_boot; fi;
bootcmd_spi=if test "${boot_device}" = "spi"; then run nor_nand_boot; fi;
bootcmd_loopdfu=setenv dfu_wait_timeout; run bootcmd_dfu;

boot_targets=fel dfu mmc0 mmc1 spi loopdfu

splash_nor=sf probe; sf read ${splash_addr} ${sf_splash_offset} ${splash_length};
splash_nand=mtd read spi-nand0 ${splash_addr} ${nand_splash_offset} ${splash_length};
splash_spi=if test "${boot_slot_1}" = "spi-nor"; then run splash_nor; fi; if test "${boot_slot_1}" = "spi-nand"; then run splash_nand; fi;
splash_mmc0=echo "mmc_splash_addr: ${mmc_splash_addr}"; load mmc ${devnum}:${mmc_bootpart} ${mmc_splash_addr} ${mmc_splash};
show_splash=run splash_${boot_device}; gpio set ${lcd_bl_pin};

distro_bootcmd=run scan_boot_slot; run show_splash; for target in ${boot_targets}; do run bootcmd_${target}; done

大哥 最后有教程吗 我也项目碰到了 怎么入手

f1c100s_fel_autorun_linux_uart0_pe0_pe1_20190518_TF_sdnand_w25q256.7z

这个直接右键另存为只有11K，损坏的，需要付费下载吗

小白新人求教uboot中怎么开启logo显示

小白新人求教uboot中怎么开启logo显示