Thanks again for your support. I have seen the hardware manual but I’m a bit of a novice to some of this stuff so doesn’t give all the information I need. Nevertheless I did manage to get the UART debugging going, and got some output at speed of 1500000.
DDR Version V1.04 20191121
LPDDR3
933MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS=1 Die BW=32 Size=1024MB
out
Bootl Release Time: Dec 9 2019 18:18:13, version: 1.05
chip_id:524b186,0
ChipType = 0x15, 10271
sfc nor id: ff ff ff
sfc_nand_id: ff ff ff
NeedKHz=200KHz,clock=12000KHz
NeedKHz=200KHz,clock=12000KHz
NeedKHz=200KHz,clock=12000KHz
NeedKHz=18000KHz,clock=192000KHz
NeedKHz=48000KHz,clock=192000KHz
mmc2:cmd19,100
SdmmcInit=2 0
BootCapSize=2000
UserCapSize=7456MB
FwPartOffset=2000 , 2000
SdmmcInit=0 NOT PRESENT
StorageInit ok = 20602
SecureMode = 0
Secure read PBA: 0x4
Secure read PBA: 0x404
Secure read PBA: 0x804
Secure read PBA: 0xc04
Secure read PBA: 0x1004
1806 loader need rk sign!
SecureInit ret = -1, SecureMode = 0
So this is all about the CPU naturally. Most of it seems reasonable, or at least doesn’t suggest anything problematic to me, but the last couple of lines suggest a problem. From what I’ve seen a return of -1 is never good haha. Mean anything to you?
Thanks.