PIC16LF1937 isn't recognized by ccs ide

[nehallove]

Hi All,

I am using following:

CCS IDE Version 4.135
Hardware: Microchip F1 evaluation kit with pic16LF1937 populated on the board.

After successfully compiling, when i try to go to debugger it throws an error message saying:

" Target Detect Error " - The detected target (Device ID 3FE0) doesn't match the code's target:PIC16LF1937. Do you want to continue anyway?

It doesn't work. I kinda know that this error is for target mismatch. I also looked the processor on the kit it is the same even on website it is the same.

Can anyone please help me on this?

Thank you.

nehl
_________________
nehal

[Ttelmah]

The device ID being returned, is _not_ correct for that processor. I think you need to talk to MicroChip, but the device ID for the LF1937, should be:

xx10 0100 100r rrrr

Where 'r' is the chip revision, and 'xx' is undefined.

You are actually reading 1's for every bit of the device ID. Normally means a faulty chip.

Best Wishes

[Douglas Kennedy]

You didn't say which device programmer ( Ex CCS ICD-u64) you are using).
Assuming the pic16LF1937chip isn't defective the issue is often with the wired connection (MCLR PGC PGD +ve and Ground). The ICD-U64 has diagnostics in which it will create various voltages on these wires that you can test at the PIC pins. The pullup value on MCLR can also be an issue. The device programmers have limited drive and can't support some pullup values. The length of the wired connection can also be an issue. Usually it is kept to about 6 inches or less. Oh and one other thing some chips have options as to the pin assignments for PGC PGD the wired connection must match the pins selected in your code (#device ICD=n)

[Ttelmah]

Agree, but the odd thing is that the chip is returning zeros for the revision number. Normally a bad connection gives all 1's, or just random values.

Best Wishes

[nehallove]

I called TechSupport, what it turned out was the voltage for the board was in range 1.8 to 3.6V.
I set the voltage to 2 V before and it didn't work I increased it to 3 V and it works.

But now I have another error:
" Could not start target: The target was not halted after reset. Check the target oscillator and MCLR. Make sure the target clock match the clock fuse and that the target is oscillating. Use View|Valid fuses to find the correct clock fuse.'

I check the possible fuses: I am trying following fuses and header file --

[nehallove]

One thing I noticed in this evalboard is that MCLR pin has directly connect to ICD, there is nothing else is connected on the MCLR pin. Does that the issue?

nehl
_________________
nehal

[Ttelmah]

No 'clock' statement shown. HS, is not going to work with a 32KHz crystal. What is on OSC1/OSC2, or do you want to run with T1OSC?.
When you move on and try to run without the ICD, 'NOMCLR', will be needed in the fuses.

Best Wishes

[nehallove]

Well first I would like to go to debugger. OSC1 and OSC2 are not connected to any crystal. I would like to set frequency later on, but currently i would like to work with debugger with any frequency.

Thank you.
_________________
nehal

[Ttelmah]

The debugger, needs a crystal attached to the chip. The chip won't run (even in debug mode), without one. This is what is being complained about....
ICD, runs in the _chip_. The hardware has to be setup correctly to work, to start with.

Best Wishes