U-BootDownloadDetails < Training

---+ U-Boot Download Details

---++ Find out where to download to (memory map)

   * =RAM:   0x00000000 ...=
   * =Flash: 0xFF000000 ...=
   * Begin of U-Boot image: Begin of Flash
   * Size of U-Boot image: approx. 120 kb, reserved: 256 kB

---++ Find out how flash memory is structured (erase blocks)

   * ATC board uses AMD 29LV641D flash chips (64 Mbit, uniform sectors)
   * all erase blocks (sectors) = 64 kB

---++ Use BDI2000 to erase flash and program the image

   * Check where flash (=boot device) is mapped after reset
      <verbatim>
ATC>rd br0
br0: 0x00001001  4097
      </verbatim>
   ==> =BR0[BA] = 0x00000000=

   * Erase first 256 kB (= first 4 sectors)
      <verbatim>
ATC>era 0
Erasing flash at 0x00000000
Erasing flash passed
ATC>era 0x10000
Erasing flash at 0x00010000
Erasing flash passed
ATC>era 0x20000
Erasing flash at 0x00020000
Erasing flash passed
ATC>era 0x30000
Erasing flash at 0x00030000
Erasing flash passed
      </verbatim>
   * Program U-Boot binary image starting at address =0x00000000=
      <verbatim>
ATC>prog 0x00000000 /tftpboot/ATC/u-boot.bin-wd bin
Programming /tftpboot/ATC/u-boot.bin-wd , please wait ....
Programming flash passed
      </verbatim>
   * Start U-Boot image
      <verbatim>
ATC>reset
- TARGET: processing user reset request
- BDI asserts HRESET
- Reset JTAG controller passed
- Bypass check: 0x55 => 0xAA
- Bypass check: 0x55 => 0xAA
- JTAG exists check passed
- Target PVR is 0x80911014
- COP status is 0x01
- Check running state passed
- BDI scans COP freeze command
- BDI removes HRESET
- COP status is 0x05
- Check stopped state passed
- Check LSRL length passed
- BDI sets breakpoint at 0x00000100
- BDI resumes program execution
- Waiting for target stop passed
- TARGET: Target PVR is 0x80911014
- TARGET: resetting target passed
- TARGET: processing target startup ....
- TARGET: processing target startup passed
ATC>go
      </verbatim>

---++ Fine tuning the BDI2000 config file

   * Set defaults for flash sectors to erase and image to program
      <verbatim>
[FLASH]
...
FILE        /tftpboot/ATC/u-boot.bin
FORMAT      BIN  0x00000000
ERASE       0x00000000 BLOCK
ERASE       0x00010000 BLOCK
ERASE       0x00020000 BLOCK
ERASE       0x00030000 BLOCK
      </verbatim>
   * Now use simple commands
      <verbatim>
ATC>era  
Erasing flash at 0x00000000
Erasing flash at 0x00010000
Erasing flash at 0x00020000
Erasing flash at 0x00030000
Erasing flash passed
ATC>prog
Programming /tftpboot/ATC/u-boot.bin , please wait ....
Programming flash passed
      </verbatim>


-- Main.Wolfgang Denk - 14 May 2003