Hi, all!
I'm a new in u-boot and embedded linux. I have a custom board based on DM816x EVM with configuraions:
- 512 Mb DDR3 on EMIF1
- SPI FLASH for booting u-boot image
- USART2 for printing messages (on linux host started minicom)
- custom gel-file to init DDR3 and board (I make it based on DM816x.gel) it init DDR3, and GPMC on the board. Using ddr3_slave_ratio_search.out I obtained DDR3 parameters: WR_DQS_RATIO, RD_DQS_RATIO, DQS_GATE for gel-file.
I changed (to my mind) all parameters in u-boot as in my gel-file, rebuild u-boot for SPI-booting and burn image into SPI flash (using spi-flash-writer.out). After power up board I see at address 0x40400000 contents of u-boot.noxip.bin.spi file, and on 0xC0700000 u-boot after relocation (as I understand). But I see nothing on minicom.
For debugging i have all hardware and software: oscilloscope, JTAG emulator BH-USB-560M, CCS 5.1, and Linux host for rebuilding u-boot. But I don't know how to debug u-boot and booting process. I try to load elf-file u-boot from CCS and stepping, but I don't know ARM assembler (read some book at this moment about it).
I can provide all necessary information (*gel, schematic, u-boot code or something else)
My questions is:
1) What parts (files *.h, *,c, *.S) of u-boot I must to change.
2) Please explain for me how I can debug booting process?
Thank you to all for help or any useful information.
P.S. Sorry for my English.
