Albatron Technology ARM11/Cortex-A8

bdiGDB

for GNU Debugger, BDI2000 (ARM11/Cortex-A8) User Manual 37

Note:

Some Intel ﬂash chips (e.g. 28F800C3, 28F160C3, 28F320C3) power-up with all blocks in locked

state. In order to erase/program those ﬂash chips, use the init list to unlock the appropriate blocks:

WM16 0xFFF00000 0x0060 unlock block 0

WM16 0xFFF00000 0x00D0

WM16 0xFFF10000 0x0060 unlock block 1

WM16 0xFFF10000 0x00D0

....

WM16 0xFFF00000 0xFFFF select read mode

or use the Telnet "unlock" command:

UNLOCK [<addr> [<delay>]]

addr This is the address of the sector (block) to unlock

delay A delay time in milliseconds the BDI waits after sending the unlock com-

mand to the ﬂash. For example, clearing all lock-bits of an Intel J3 Strata

ﬂash takes up to 0.7 seconds.

If "unlock" is used without any parameter, all sectors in the erase list with the UNLOCK option are

processed.

To clear all lock-bits of an Intel J3 Strata ﬂash use for example:

BDI> unlock 0xFF000000 1000

To erase or unlock multiple, continuos ﬂash sectors (blocks) of the same size, the following Telnet

commands can be used:

ERASE <addr> <step> <count>

UNLOCK <addr> <step> <count>

addr This is the address of the ﬁrst sector to erase or unlock.

step This value is added to the last used address in order to get to the next sec-

tor. In other words, this is the size of one sector in bytes.

count The number of sectors to erase or unlock.

The following example unlocks all 256 sectors of an Intel Strata ﬂash ( 28F256K3) that is mapped to

0x00000000. In case there are two ﬂash chips to get a 32bit system, double the "step" parameter.

BDI> unlock 0x00000000 0x20000 256