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products:sbc:common:development:erase-emmc
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products:sbc:common:development:erase-emmc [2022/07/05 08:12] frank Add erase eMMC |
products:sbc:common:development:erase-emmc [2024/04/24 03:21] ivan [Serial Mode (For developers)] |
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| This document mainly introduces the method of clearing eMMC. You will learn about 3 methods to clear eMMC. | This document mainly introduces the method of clearing eMMC. You will learn about 3 methods to clear eMMC. | ||
| + | |||
| + | <WRAP important > | ||
| + | The operation of VIM1, VIM2 and VIM3 is almost the same, so this document will take VIM3L as an example. | ||
| + | |||
| + | </ | ||
| ===== Erase Method ===== | ===== Erase Method ===== | ||
| Line 10: | Line 15: | ||
| <tabbox Serial Mode (For developers)> | <tabbox Serial Mode (For developers)> | ||
| - | * Refer to this [[/products/sbc/common/development/ | + | * Refer to this [[products:sbc:common:development: |
| * Once again, ensure you’ve done the correct connections and setup. | * Once again, ensure you’ve done the correct connections and setup. | ||
| * Hit any keys at the moment of bootup to stop autoboot. This step will make your VIM enter into u-boot mode. | * Hit any keys at the moment of bootup to stop autoboot. This step will make your VIM enter into u-boot mode. | ||
| - | * Type '' | + | * Type '' |
| * Type reboot or press the '' | * Type reboot or press the '' | ||
| * Use the following as a reference: | * Use the following as a reference: | ||
| - | ```sh | + | ```shell |
| - | kvim# store init 3 | + | kvim3#store init 3 |
| - | emmc/sd response timeout, cmd8, status=0x1ff2800 | + | XXXXXXX======enter EMMC boot======XXXXXX |
| - | emmc/sd response timeout, cmd55, status=0x1ff2800 | + | co-phase 0x1, tx-dly 0, clock 40000000 |
| - | [mmc_startup] mmc refix success | + | co-phase 0x1, tx-dly 0, clock 40000000 |
| + | co-phase 0x3, tx-dly 0, clock 400000 | ||
| + | emmc/sd response timeout, cmd8, cmd-> | ||
| + | emmc/sd response timeout, cmd55, cmd-> | ||
| + | co-phase 0x3, tx-dly 0, clock 400000 | ||
| + | co-phase 0x1, tx-dly 0, clock 40000000 | ||
| + | [set_emmc_calc_fixed_adj][860]find fixed adj_delay=20 | ||
| + | init_part() 297: PART_TYPE_AML | ||
| [mmc_init] mmc init success | [mmc_init] mmc init success | ||
| switch to partitions #0, OK | switch to partitions #0, OK | ||
| Line 28: | Line 40: | ||
| Manufacturer ID: 15 | Manufacturer ID: 15 | ||
| OEM: 100 | OEM: 100 | ||
| - | Name: 8WPD3 | + | Name: AJTD4 |
| Tran Speed: 52000000 | Tran Speed: 52000000 | ||
| Rd Block Len: 512 | Rd Block Len: 512 | ||
| - | MMC version 5.0 | + | MMC version 5.1 |
| High Capacity: Yes | High Capacity: Yes | ||
| - | Capacity: | + | Capacity: |
| mmc clock: 40000000 | mmc clock: 40000000 | ||
| - | Bus Width: 8-bit DDR | + | Bus Width: 8-bit |
| - | [store]amlmmc erase 1emmckey_is_protected : protect | + | [store]amlmmc erase 1emmckey_is_protected(): protect |
| - | start = 0,end = 57343 | + | bootloader partition is erased: |
| - | + | reserved | |
| - | + | env partition is erased: start = 0x36000,end = 0x39fff | |
| - | Caution! Your devices Erase group is 0x400 | + | rootfs |
| - | The erase range would be change | + | Erasing blocks 0 to 8192 @ boot0 |
| - | + | start = 0x0,end = 0x1fff | |
| - | start = 221184,end = 15269886 | + | Erasing blocks 0 to 8192 @ boot1 |
| - | kvim# reboot | + | start = 0x0,end = 0x1fff |
| ``` | ``` | ||
| <tabbox Interrupt Mode> | <tabbox Interrupt Mode> | ||
| Line 50: | Line 62: | ||
| This approach is suitable for all products that use the Amlogic SoC: | This approach is suitable for all products that use the Amlogic SoC: | ||
| - | * Carry out normal upgrading via [[|USB-C Cable]] or [[/ | + | * Carry out normal upgrading via [[start|USB-C Cable]] or [[/ |
| * Manually interrupt the upgrading process (forcefully disconnect after 15% is recommended). For example, unplug the USB-C cable or the TF card. | * Manually interrupt the upgrading process (forcefully disconnect after 15% is recommended). For example, unplug the USB-C cable or the TF card. | ||
| * Power on your VIM again, and you’ll find that all the data on the eMMC has been erased. | * Power on your VIM again, and you’ll find that all the data on the eMMC has been erased. | ||
| Line 60: | Line 72: | ||
| Power on and boot up. | Power on and boot up. | ||
| Open a terminal, and run '' | Open a terminal, and run '' | ||
| - | ```sh | + | ```shell |
| root@Khadas: | root@Khadas: | ||
| dd: writing to '/ | dd: writing to '/ | ||
Last modified: 2024/04/24 03:23 by ivan