Marcelo, Try changing the MEMMAP register (see User Manual for details).
On Wed, Dec 16, 2009 at 17:05, Marcelo Utikawa da Fonseca <marcelo.fons...@tecnequip.com.br> wrote: > First of all, thanks for everyone helping me to solve this issue! :-) > > Igor: > I am sorry! Now I found the text about memory map after a reset. The problem > regarding the first 64 bytes was solved. > Now I just need to know how to disable this memory map... > About calc_checksum, I am already using it: > > flash bank lpc2000 0x0 0x80000 0 0 0 lpc2000_v2 12000 calc_checksum > > Nico: > lpc21isp will be a very useful tool! I will try it. thank you very much! > > I still need OpenOCD to debug software using GDB. > When the gdb succesfully write to the flash memory, the program starts and > reaches a breakpoint in main. When it fails, the breakpoint is never > reached. When I stop gdb, pc is in 0xc address (undefined instruction > vector). > After gdb write to memory, I run the command: > > monitor mdw 0 0x20 > > sometimes it shows the same initial 64 bytes (now I know that this is the > mapped memory) and sometimes the correct data. > Why sometimes it works and sometimes it do not? > How can I disable this memory to be mapped? > I will search for this, any news I will send to the list! > > Thank you very much again! > > Best regards, > Marcelo Utikawa da Fonseca > > Igor Skochinsky escreveu: > > Marcelo, > > The current lpc2000.c mentions this: > > /* > * flash bank lpc2000 <base> <size> 0 0 <target#> <lpc_variant> <cclk> > [calc_checksum] > */ > > Have you tried adding "calc_checksum"? > > On Wed, Dec 16, 2009 at 16:13, Nico Coesel <ncoe...@dealogic.nl> wrote: > > > -----Original Message----- > From: openocd-development-boun...@lists.berlios.de [mailto:openocd- > development-boun...@lists.berlios.de] On Behalf Of Igor Skochinsky > Sent: woensdag 16 december 2009 16:01 > To: Marcelo Utikawa da Fonseca > Cc: openocd-development@lists.berlios.de > Subject: Re: [Openocd-development] Problem when tryng to flash LPC2368 > > Hello Marcelo, > > What you see is bootrom code that gets automatically mapped to 0 if > there is no user code or it's invalid. > > "The interrupt vectors residing in the boot block of the on-chip flash > memory also become active after reset, i.e., the bottom 64 bytes of > the boot block are also visible in the memory region starting from the > address 0x0000 0000. The reset vector contains a jump instruction to > the entry point of the flash boot loader software." > > 00000000 LDR R4, =0x3FFF8000 > 00000004 LDR R5, =0xFFFFBFFF > 00000008 LDR R6, [R4] > 0000000C AND R6, R5, R6 > 00000010 STR R6, [R4] > 00000014 LDR PC, =0x7FFFE040 > > 0x7FFFE040 is the bootrom entrypoint. > > "3.1.1 Criterion for Valid User Code > Criterion for valid user code: The reserved ARM interrupt vector > location (0x0000 0014) should contain the 2's complement of the > check-sum of the remaining interrupt vectors. This causes the checksum > of all of the vectors together to be 0. The boot loader code disables > the overlaying of the interrupt vectors from the boot block, then > checksums the interrupt vectors in sector 0 of the flash. If the > signatures match then the execution control is transferred to the user > code by loading the program counter with 0x0000 0000. Hence the user > flash reset vector should contain a jump instruction to the entry > point of the user application code." > > My guess is that FlashMagic automatically patches the checksum to be > correct. > > > IIRC OpenOCD should do this or has this function been deleted? I recall > some discussion about that but I don't remember the outcome. I can't > imagine OpenOCD doesn't calculate the checksum. All compiler / linker > tools more or less assume the programming software takes care of > creating the checksum. > > Nico Coesel > > _______________________________________________ > Openocd-development mailing list > Openocd-development@lists.berlios.de > https://lists.berlios.de/mailman/listinfo/openocd-development > > > > > > --------------------------------------------- > Tecnequip Tecnologia em Equipamentos > Endereço/Address: R. Ganges, 557 > Cidade/City: São Paulo > Estado/State: SP > País/Country: Brasil > CEP/Postal Code: 03445-030 > Fone/Phone: 55-11-20937199 > FAX: 55-11-29412289 > > _______________________________________________ > Openocd-development mailing list > Openocd-development@lists.berlios.de > https://lists.berlios.de/mailman/listinfo/openocd-development > > -- WBR, Igor _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
