I'm trying to get things working with my cheap-oh JTAG and hitting some snags with the flash erase behavior.
First what is the flash block size for the flash on the 2148? the spec sheet http://www.nxp.com/acrobat_download/datasheets/LPC2141_42_44_46_48_3.pdf doesn't seem to call it out. I can look at memory and explore the 2148 memory map (which looks correct) but trying to erase the flash is being a problem. What flash technology is used in the 2148? for intel strata flash I sued to poke flash addresses and implement block operations by hand. I would like to see if I can do that with this part. FWIW the following shows my problem I read 0 to 128, erase the first blocks then read 0 to 128 to find the data still there. Is there a protect flag set on the flash? > mdh 0x0 128 0x00000000: 4034 e59f 5002 e3a0 5000 e584 5003 e3a0 5004 e584 201c e59f 3000 e3a0 0093 e102 0x00000020: 2028 e282 1093 e102 3007 e3c0 3028 e502 f004 e51f d1c4 7fff c014 e002 c000 e01f 0x00000040: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x00000060: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x00000080: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000a0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000c0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000e0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff > flash erase 0 0 2 erased sectors 0 through 2 on flash bank 0 in 0s 101437us > mdh 0x0 128 0x00000000: 4034 e59f 5002 e3a0 5000 e584 5003 e3a0 5004 e584 201c e59f 3000 e3a0 0093 e102 0x00000020: 2028 e282 1093 e102 3007 e3c0 3028 e502 f004 e51f d1c4 7fff c014 e002 c000 e01f 0x00000040: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x00000060: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x00000080: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000a0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000c0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff 0x000000e0: ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff > Any guesses or insights welcome. Thanks, ss
signature.asc
Description: Digital signature
_______________________________________________ psas-avionics mailing list psas-avionics@lists.psas.pdx.edu http://lists.psas.pdx.edu/mailman/listinfo/psas-avionics
