Reading Device ID from within PBP

I need to determine the chip type I'm running in, as well as the oscillator configuration. I seem to vaguely remember a thread on reading the configuration bytes and the Device ID from within PBP, but a search turns up nothing. Could someone please tell me where to look?

mmm, i think some part of it are available... but for 18Fs

i think you refer to the following...
http://www.picbasic.co.uk/forum/showthread.php?t=4093

Thanks. That is what I was looking for. I only work with 18F parts, so this should do it.

Thanks to you (and Darrel)

Charles Linquist

I just opened the 18F4550.inc file...look what you got at the end of...

Code:

---

_DEVID1          EQU  H'3FFFFE'
_DEVID2          EQU  H'3FFFFF'

_IDLOC0          EQU  H'200000'
_IDLOC1          EQU  H'200001'
_IDLOC2          EQU  H'200002'
_IDLOC3          EQU  H'200003'
_IDLOC4          EQU  H'200004'
_IDLOC5          EQU  H'200005'
_IDLOC6          EQU  H'200006'
_IDLOC7          EQU  H'200007'

---

Sure there's something to do with it...

yes indeed that was simple to read the PIC ID using one part of the Darrel's code and a 18F4680

Code:

---

    '  READING pic18f4680 DEVICE ID
    '
    DEFINE OSC 20
    DEFINE LOADER_USED 1
    DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
    DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
    DEFINE HSER_SPBRG 129 ' 9600 Baud @ 20MHz, 0.16%
    DEFINE HSER_CLROERR 1 ' Clear overflow automatically
    ID1 var byte
    ID2 var byte
    GOTO START

@  #include "RTconfig.inc"

START: 
    @ ReadConfig?CB _DEVID1, _ID1
    @ ReadConfig?CB _DEVID2, _ID2
    HSEROUT ["DEVID1=",HEX ID1,"    DEVID2=",HEX ID2]
    STOP

---

Serial communicator show...

Code:

---

DEVID1=82    DEVID2=0E

---

Using a my programmer to read the device, i have...

Code:

---

L0100: >> 24.02.2007, 13:10:13
L0101: Reading device: Microchip PIC18F4680.
L0102: Device insertion test ...
L0103: Checking device ID ...
L0104: Device ID: DEVID2=0Eh  DEVID1=82h
L0105: Reading device ...
L0106: Verifying device at VCCmax. ...
L0107: Verifying device at VCCmin. ...
L0108: Reading device - done.
L0109: Elapsed time: 0:00:30.6
L0110: Buffer checksum in range of device [0h..7FFFh]: 00FD3D23h

---

Somehow interesting. i bet you will be able to change and create your own device ID in the ID locations at run time as well. Nice place to save the software version...

Along with erasing osccal values, some of the free software or maybe a glitch has managed to erase the device id as well. i have a few pics that show up as unknown. I'm quickly becoming an expert on what NOT to do. lol.