The part of code I given out is in my get_flash_size() function in my flash.c. This part of code is used to read out the Manufacture ID and Device ID of my nor flash. This maybe have no contribution to the source tree, but maybe others that having the same problem can get a clue for such problems.
2009/11/26 Wolfgang Denk <w...@denx.de> > Dear Peter Pan, > > In message <48abf2c20911251756k1ca3fe19p26db4a65b68bc...@mail.gmail.com> > you wrote: > > > > I have checked this problem again, and find out the reason why sometimes > > we get a false value of the ID0 we read from norflash. > > > > When we read IDs from norflash, we first write the read id command: > > > > AMD_SEND_CMD(baseaddr, ACMD_READMODE); > > AMD_SEND_CMD((baseaddr | LATCH_OFFSET1), ACMD_UNLOCK1); > > AMD_SEND_CMD((baseaddr | LATCH_OFFSET2), ACMD_UNLOCK2); > > AMD_SEND_CMD((baseaddr | LATCH_OFFSET1), ACMD_ID); > > > > then we read the IDs from norflash: > > pAddr = (unsigned short *)(baseaddr & 0xFFFFFF00); //Manufacture Id > > code0 = *(pAddr); //cycle 4: Addr: X00 data = 0x01 > > pAddr = (unsigned short *)(baseaddr + DEVICE_CODE1_OFFSET_2X16); > > code1 = *pAddr; //cycle 4: Addr: X01, X - don't care. data = 0x227E > > pAddr = (unsigned short *)(baseaddr + DEVICE_CODE2_OFFSET_2X16); > > code2 = *pAddr; //cycle 5: Addr: X0E data = 0x2223 > > pAddr = (unsigned short *)(baseaddr + DEVICE_CODE3_OFFSET_2X16); > > code3 = *(pAddr); //cycle 6: Addr: X0F data = 0x2201 > > AMD_SEND_CMD(baseaddr, ACMD_READMODE); > > Umm.. could you please point out which specific part of code (i. e . > file name and line numbers, or snippet of the real code from the > source file) you are talking about here? > > I have problems following you, as for example I can find no such thing > as AMD_SEND_CMD or ACMD_READMODE or LATCH_OFFSET anywhere in the whole > source tree ? > > Best regards, > > Wolfgang Denk > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de > You could end up being oddly sad and full of a strange, diffuse com- > passion which would lead you to believe that it might be a good idea > to wipe out the whole human race and start again with amoebas. > - Terry Pratchett, _Guards! Guards!_ >
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