| Navin Sankar Velliangiri | a3a0bc8 | 2021-05-18 09:03:20 +0530 | [diff] [blame] | 1 | How to use U-BOOT on SeeedStudio NPI-IMX6ULL Single Board Computer |
| 2 | ------------------------------------------------------------------ |
| 3 | |
| 4 | - Configure and build U-Boot for NPI-IMX6ULL: |
| 5 | |
| 6 | $ export ARCH=arm |
| 7 | $ export CROSS_COMPILE=arm-none-linux-gnueabihf- |
| 8 | $ make seeed_npi_imx6ull_defconfig |
| 9 | $ make |
| 10 | |
| 11 | This will generate SPL and u-boot-dtb.img images. |
| 12 | |
| 13 | Boot from MMC/SD: |
| 14 | - The SPL and u-boot-dtb.img images need to be flashed into the micro SD card: |
| 15 | |
| 16 | $ sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync |
| 17 | $ sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 bs=1k seek=69; sync |
| 18 | |
| 19 | - Boot mode settings: |
| 20 | |
| 21 | Boot switch position: SW1 -> 0 |
| 22 | SW2 -> 1 |
| 23 | SW3 -> 0 |
| 24 | SW4 -> 0 |
| 25 | SW5 -> 1 |
| 26 | SW6 -> 0 |
| 27 | SW7 -> 0 |
| 28 | SW8 -> 1 |
| 29 | |
| 30 | Boot from NAND: |
| 31 | - Boot the board using SD/MMC or Serial download and load the SPL into memory |
| 32 | either from SD/MMC or TFTP. |
| 33 | |
| 34 | Default MTD layout is 512k(spl),1m(uboot),1m(uboot-dup),-(ubi) |
| 35 | |
| 36 | Flash SPL to NAND from SD/MMC, |
| 37 | |
| 38 | $ ext4load mmc 0:2 $loadaddr SPL |
| 39 | $ nand erase.part spl |
| 40 | $ nandbcb init $loadaddr 0x0 $filesize |
| 41 | |
| 42 | Flash u-boot image to NAND from SD/MMC, |
| 43 | |
| 44 | $ ext4load mmc 0:2 $loadaddr u-boot-dtb.img |
| 45 | $ nand erase.part uboot |
| 46 | $ nand write $loadaddr uboot $filesize |
| 47 | |
| 48 | - Boot mode settings: |
| 49 | |
| 50 | Boot switch position: SW1 -> 0 |
| 51 | SW2 -> 1 |
| 52 | SW3 -> 1 |
| 53 | SW4 -> 0 |
| 54 | SW5 -> 0 |
| 55 | SW6 -> 1 |
| 56 | SW7 -> 0 |
| 57 | SW8 -> 0 |
| 58 | |
| 59 | - Connect the Serial cable to UART0 and the PC for the console. |
| 60 | |
| 61 | - Reset the board using reset button and U-Boot should boot from NAND. |