Posted on June 25, 2003 at 22:50I have a similar problem,
I'm developing an uninstall/erase/reprogram feature for ST10F269 which will be in block write protected and code readout protected mode. After the second try of my chip erase code, running out of on-chip RAM at address FC00h, bootstrap mode stopped working. The first try did succeed at erasing the chip.
Notes:
Block 0 is mapped to segment 0
DPP0=0
Interrupts are disabled
The characters '0' and '1' were both received from the serial port.
Using Tasking C compiler for Windows, v6.0r4 (with #pragma asm)
Code that appears to have caused the problem:
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;; Erase chip
mov r1,#01554h; Valid addresses in internal ROM with block 0 in seg 0
mov r2,#02aa8h;
mov r3,#0a8h;
mov r4,#054h;
mov r5,#080h;
mov r6,#010h;
mov [r1],r3; ; Write cycle 1
mov [r2],r4; ; Write cycle 2
mov [r1],r5; ; Write cycle 3
mov [r1],r3; ; Write cycle 4
mov [r2],r4; ; Write cycle 5
mov [r1],r6; ; Write cycle 6
movb S0TBUF,#'0';
;; Wait for erase to finish
c_1:
mov r7,[r1];
jnb r7.7,c_1;
movb S0TBUF,#'1';
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