I did not include either of those header files.  In fact, the 'LPC2_ISP_8K_V04.a51' compiles without adding any other files to the project. I compiled 'LPC2_ISP_8K_V04.a51' with no other files so F0 can't be a definition unless it is in 'LPC2_ISP_8K_V04.a51', but it is not in that file.



--- In lpc900_users@yahoogroups.com, Nilesh <inileshce@...> wrote:
>
> Dear John,
>
> FO bit is PSW only. You can also look at header(.h) file or include(.inc) file
>
> In LPC9xx.h ---> sbit F0 = PSW^5;
>
> In LPC9xx.INC ---> F0 BIT 0D5H
>
>
> john j_funk1425@... wrote:
> I don't believe that F0 is the PSW flag bit since I can't find a
> definition (like: F0 EQU D0) in the file. This would mean the
> assembler would interpret it as an absolute number of 0xF0.
> The CRC is good when checking after programming the device. but if
> the IAP function is used for programming just a few bytes doing a CRC
> for the whole sector seems excessive.
>
> --- In lpc900_users@yahoogroups.com, "Dr. Vithal N. Kamat"
> vnk_ad1@ wrote:
> >
> > Dear John,
> > I had a look at the LPC2_ISP_8K_V04.a51, and it is the F0 flag in
> > PSW.
> > You are right that the IAP function returns error when the Carry
> > Flag is set, and this flag is not used in the above ISP code.
> > However, a different approach is used to detect program write
> > errors - such as by verifying the Block level CRC and global CRC.
> > Vithal Kamat
> >
> > --- In lpc900_users@yahoogroups.com, "john" <j_funk1425@> wrote:
> > >
> > > I noticed that the User manual (UM10116.pdf Rev. 02 — 9 June 2005)
> > > states that the IAP functions return an error when the Carry Flag
> > is
> > > set. But the ISP boot code from NXP, LPC2_ISP_8K_V04.a51, is
> > testing
> > > the bit F0:
> > > JB F0,ERROR ;check if an error occured
> > >
> > > At first I thought it was the F0 flag in PSW but there is no
> > definition
> > > for that so the assembler is reading it as the F0 bit which is
> bit
> > zero
> > > of the B register.
> > >
> > > Does anyone know if the user manual is correct or if the ISP boot
> > code
> > > is right? If the ISP boot code is wrong and if it's the same code
> > that
> > > comes from the factory the ISP code would never return program
> > write
> > > errors!
> > >
> >
>
>
>
>
>
>
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