Improve doc

README.md

@@ -8,6 +8,116 @@ Some challenges we have encountered so far:
 
 ## Flash the router
 
-First connect with your UART cable on the router:
+(Configure your computer with a static IP address 192.168.1.2/24 and make sure you have a running tftp server containing your image)
+
+First connect your UART cable on the router:
 
 ![UART](img/uart.jpg)
+
+Launch minicom
+
+```
+sudo minicom -D /dev/ttyUSB0
+```
+
+Then boot the router. Press repeatidly `[ENTER]` to get the following prompt:
+
+```
+(IPQ40xx) #
+```
+
+Then enter the following commands:
+
+```
+set ipaddr 192.168.1.1
+set serverip 192.168.1.2
+ping ${serverip}
+sf probe
+tftpboot 0x84000000 openwrt-ipq40xx-compex_wpj428-squashfs-sysupgrade.bin
+sf erase 0x00180000 +$filesize
+sf write 0x84000000 0x00180000 $filesize
+bootipq
+```
+
+## Logs
+
+uboot logs:
+
+```
+Format: Log Type - Time(microsec) - Message - Optional Info
+Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
+S - QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.1-00118
+S - IMAGE_VARIANT_STRING=DAABANAZA
+S - OEM_IMAGE_VERSION_STRING=CRM
+S - Boot Config, 0x00000021
+S - Reset status Config, 0x00000000
+S - Core 0 Frequency, 0 MHz
+B -       261 - PBL, Start
+B -      1339 - bootable_media_detect_entry, Start
+B -      1679 - bootable_media_detect_success, Start
+B -      1693 - elf_loader_entry, Start
+B -      5073 - auth_hash_seg_entry, Start
+B -      7219 - auth_hash_seg_exit, Start
+B -    577690 - elf_segs_hash_verify_entry, Start
+B -    695375 - PBL, End
+B -    695399 - SBL1, Start
+B -    786439 - pm_device_init, Start
+D -         7 - pm_device_init, Delta
+B -    787885 - boot_flash_init, Start
+D -     52818 - boot_flash_init, Delta
+B -    844845 - boot_config_data_table_init, Start
+D -      3835 - boot_config_data_table_init, Delta - (419 Bytes)
+B -    852054 - clock_init, Start
+D -      7575 - clock_init, Delta
+B -    864102 - CDT version:2,Platform ID:8,Major ID:1,Minor ID:0,Subtype:0
+B -    867516 - sbl1_ddr_set_params, Start
+B -    872614 - cpr_init, Start
+D -         2 - cpr_init, Delta
+B -    876996 - Pre_DDR_clock_init, Start
+D -         4 - Pre_DDR_clock_init, Delta
+D -     13176 - sbl1_ddr_set_params, Delta
+B -    890735 - pm_driver_init, Start
+D -         2 - pm_driver_init, Delta
+B -    960961 - sbl1_wait_for_ddr_training, Start
+D -        28 - sbl1_wait_for_ddr_training, Delta
+B -    976579 - Image Load, Start
+D -    151978 - QSEE Image Loaded, Delta - (297240 Bytes)
+B -   1128985 - Image Load, Start
+D -      1447 - SEC Image Loaded, Delta - (2048 Bytes)
+B -   1139420 - Image Load, Start
+D -    211388 - APPSBL Image Loaded, Delta - (432219 Bytes)
+B -   1351204 - QSEE Execution, Start
+D -        60 - QSEE Execution, Delta
+B -   1357421 - SBL1, End
+D -    664130 - SBL1, Delta
+S - Flash Throughput, 2007 KB/s  (731926 Bytes,  364613 us)
+S - DDR Frequency, 537 MHz
+
+
+U-Boot 2012.07 [Chaos Calmer 15.05.1,r35193] (Jul 25 2017 - 11:36:26)
+
+smem ram ptable found: ver: 1 len: 3
+DRAM:  256 MiB
+machid : 0x8010000
+NAND:  SF: Detected MX25L25635E with page size 4 KiB, total 32 MiB
+ipq_spi: page_size: 0x100, sector_size: 0x1000, size: 0x2000000
+32 MiB
+MMC:   
+*** Warning - bad CRC, using default environment
+
+In:    serial
+Out:   serial
+Err:   serial
+machid: 8010000
+flash_type: 0
+Hit any key to stop autoboot:  0 
+Net:   MAC0 addr:4:f0:21:65:18:12
+PHY ID1: 0x4d
+PHY ID2: 0xd0b1
+ipq40xx_ess_sw_init done
+eth0
+```
+
+## Sources
+
+  - [All the commits in OpenWRT about the WPJ428](https://git.openwrt.org/?p=openwrt%2Fopenwrt.git&a=search&h=HEAD&st=commit&s=WPJ428)