−Table of Contents

Edge1 Erase eMMC

Introduction

This document mainly introduces the method of clearing eMMC. You will learn about 3 methods to clear eMMC.

The operation of VIM1, VIM2 and VIM3 is almost the same, so this document will take VIM3L as an example.

Erase Method

  • Refer to this guide to setup the Serial Tool for your VIM.
  • 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.
  • Type store erase boot on the terminal of u-boot, and wait for the erasure process to complete.
  • Type reboot or press the Reset button.
  • Use the following as a reference:
kvim3#store init 3
XXXXXXX======enter EMMC boot======XXXXXX
co-phase 0x1, tx-dly 0, clock 40000000
co-phase 0x1, tx-dly 0, clock 40000000
co-phase 0x3, tx-dly 0, clock 400000
emmc/sd response timeout, cmd8, cmd->cmdarg=0x1aa, status=0x3ff2800
emmc/sd response timeout, cmd55, cmd->cmdarg=0x0, status=0x3ff2800
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
switch to partitions #0, OK
mmc1(part 0) is current device
Device: SDIO Port C
Manufacturer ID: 15
OEM: 100
Name: AJTD4 
Tran Speed: 52000000
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: (0x3a3e00000 Bytes) 14.6 GiB
mmc clock: 40000000
Bus Width: 8-bit
[store]amlmmc erase 1emmckey_is_protected(): protect
bootloader partition is erased: start = 0x0,end = 0x1fff
reserved   partition is protected
env        partition is erased: start = 0x36000,end = 0x39fff
rootfs     partition is erased: start = 0x3e000,end = 0x1d1efff
Erasing blocks 0 to 8192 @ boot0
start = 0x0,end = 0x1fff
Erasing blocks 0 to 8192 @ boot1
start = 0x0,end = 0x1fff
2022/07/05 04:19 · nick · 1 Comment