Here are a few notes for anyone wanting to attach a console to the device (a Realtek RTD1295):
I used a UART to USB cable like this one: Raspberry Pi USB Console cable
Connected to the 4-pin header on the board thus:
BLACK to GND
GREEN to Rx
WHITE to Tx
RED - leave unattached
hint: Remove the little black plastic collar from the UART header first.
Download and install PuTTY from here
Before switching on the power to the board, plug the USB end of the cable into your PC or laptop and let Windows install the driver. Then run the Windows device manager and locate the new serial port. Mine was listed as “Prolific USB-to-Serial Comm Port (COM3)”. I tested driver version 3.8.28.0 on Windows 8.1 and 10.
Create a PuTTY session as follows (in the Session tab):
Connection type: Serial
Serial line: COM3 (in my case)
Speed: 115200
in the Serial tab of the PuTTY dialog I also set Flow Control to None but this may be unnecessary.
Power on the board. On booting, without the HDD attached we get:
C1:80000000
C2
?
C3h
hwsetting size: 000005C0
C4
f
5-5
Goto FSBL: 0x10100000
<=============================================>
fsbl_main: sys_secure_type = 0x0000BEEE
fsbl_main: sys_boot_type = 0x00000001
fsbl_main: sys_boot_enc = 0x00000000
fsbl_main: sys_bisr_done = 0x00000000
sys_hwsetting_size:00000600
sys_bootcode_size:00067440
sys_secure_fsbl_size:00010B00
sys_secure_os_size:00000000
sys_bl31_size:00005040
sys_rsa_key_fw_size:00000000
sys_rsa_key_tee_size:00000000
sys_rescue_size:00026360
HwSetting:
hwsetting_blk_no:88120800
hwsetting_total_size:00000680
hwsetting_blk_count:00000680
Bootcode:
bootcode_blk_no:88120E80
bootcode_total_size:00067460
bootcode_blk_count:00067460
FSBL:
secure_fsbl_blk_no:881882E0
secure_fsbl_total_size:00010B20
secure_fsbl_blk_count:00010B20
TEE OS:
secure_os_blk_no:88198E00
secure_os_total_size:00000000
secure_os_blk_count:00000000
BL31:
bl31_blk_no:88198E00
bl31_total_size:00005060
bl31_blk_count:00005060
RSA Key Fw:
rsa_key_fw_blk_no:8819DE60
rsa_key_fw_total_size:00000000
rsa_key_fw_blk_count:00000000
RSA Key TEE:
rsa_key_tee_blk_no:8819DE60
rsa_key_tee_total_size:00000000
rsa_key_tee_blk_count:00000000
Rescue:
rescue_blk_no:8819DE60
rescue_total_size:00026380
rescue_blk_count:00026380
********** FW_TYPE_BOOTCODE **********
fwInfo->fwType: 00000001
fwInfo->isGolden: 00000001
fwInfo->ddrReadAddr: 00520000
fwInfo->ddrDestAddr: 00020000
fwInfo->flashType: 00000001
fwInfo->flashUnitSize: 00000001
fwInfo->flashOffset: 88120E80
fwInfo->dataSize: 00067460
body_size:00067440
flash_unit_no:88120E80
flash_unit_count:00067460
real_size:00067418
sha256 Fw
j bootcode jump address:00020000
64b
4.1.4
CPU : Cortex-A53 quad core - AARCH32
Board: Realtek QA Board
[ERR] get_accessible_ddr_size: hw setting error. (impossible value 0x0)
[ERR] get_accessible_ddr_size: hw setting error. (impossible value 0x0)
DRAM: 0 Bytes
Watchdog: Disabled
Cache: Enabled
Non-Cache Region: 1 MB@0x07900000
nor flash id [0x00c84014]
sector 256k en: 0
sector 64k en: 1
sector 32k en: 1
sector 4k en: 1
page_program : 1
max capacity : 0x00100000
spi type name : GD25Q80C_08Mbit
[SATA] enable SATA interface
[SATA] spread-spectrum disable
Factory: NOR
Factory: pp:0, seq#:0xa, size:0x2400
------------can't find tmp/factory/000BootParam.h
Set HDMI TX OFF
In: serial
Out: serial
Err: serial
Net: Realtek PCIe GBE Family Controller mcfg = 0024
dev->name=r8168#0
*** Reboot-Action invalid ***
Hit Esc or Tab key to enter console mode or rescue linux: 0
------------can't find tmp/factory/recovery
======== Checking into android recovery ====
AHCI 0001.0301 32 slots 2 ports ? Gbps 0x3 impl SATA mode
flags: ncq pm led clo only pmp pio slum part
No port device detected!
Error, SATA device initialization failed!
bootr - boot realtek platform
Usage:
bootr [u/uz]
u - boot from usb
uz - boot from usb (use lzma image)
m - read fw from flash but boot manually (go all)
Enter console mode, disable watchdog ...
and then the help command gives:
Realtek> help
b2ndbc - load 2nd stage bootcode
bdinfo - print Board Info structure
bootm - boot application image from memory
bootr - boot realtek platform
dcache - enable or disable data cache
dhcp - boot image via network using DHCP/TFTP protocol
env - environment handling commands
factory - FACTORY sub system
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
fatwrite- write file into a dos filesystem
fdt - flattened device tree utility commands
gettime - get timer val elapsed
go - start application at address 'addr' or start running fw
goru - start rescue linux from usb
gpt - GUID Partition Table
help - print command description/usage
i2c - I2C sub-system
icache - enable or disable instruction cache
keyset - keyset - write keyset file into factory area
loady - load binary file over serial line (ymodem mode)
md - memory display
mtest - simple RAM read/write test
mtest2 - simple RAM read/write test
mw - memory write (fill)
ping - send ICMP ECHO_REQUEST to network host
reset - Perform RESET of the CPU
rtkfat - Realtek FAT32 format utility v1.0
rtkfdt - RTK fdt utility
rtkgpt - rtkgpt utility
rtkrng - rng utility
rtkspi - spi flash utility
sata - SATA sub system
saveenv - save environment variables to persistent storage
source - run script from memory
tftp - download image from TFTP server
tftpput - TFTP put command, for uploading files to a server
uart_write- for uart mp tool burn mac and sn key
unzip - unzip a memory region
usb - USB sub-system
version - print monitor, compiler and linker version
wdpp - Western Digital Boot Patition Tool
