Configuration Bits

Ron · Post by **Ron** » Wed Jan 02, 2008 3:25 am

Hi,

I want to set my configuration bits in my program.

Could someone please walk me throught the settings for a 18F2620. I have 3 other chips that I need to do this for but this is the most advanced so I should be able to figure it out from this example.

Here is how I want it set - BOLD items have been changed to the values I want them set to.

The information is based on what MPLAB shows me.

300001 - 02
Oscillator - HS
Fail-Safe Clock Monitor Enable - Disabled
Internal External Switch Over Mode - Disabled

300002 - 1F
Power Up Timer - ON
Brown Out Detect - Enabled in Hardware, SBOREN disabled
Brown Out Voltage - 2.0V

300003 - 1F
Watchdog Timer - Disabled
Watchdog Postscaler - 1:32768

300005 - 83
CCP2 Mux - RC1
Port A/D Enable - PortB<4:0> configured as digital I/O on reset
Low Power Timer1 OSC enable - disabled
Master Clear Enable - MCLR Enabled, RE3 Disabled

300006 - 85
Stack overflow reset - disabled
Low Voltage Program - disabled

300008 - 0F
All Defaults

300009 - C0
all defaults

30000A - 0F
all defaults

30000B - E0
all defaults

30000C - 0F
all defaults

30000D - 40
all defaults

I know it is a great deal of information. I appreciate it.

Thanks

Ron

Post by **Benj** » Wed Jan 02, 2008 2:04 pm

Hello Ron

Please refer to page 251 onwards of the PIC18F2620 datasheet.

Ron · Post by **Ron** » Wed Jan 02, 2008 5:48 pm

Hello,

I think I am asking the question wrong.

Chip - Configure

Is it possible for someone using an MPLAB ICD2 USB programmer to set the configuration bits in the configure window within Flowcode V3?

I would like to have the software default to certain setting, so I do not have to set them manually in MPLAB.

If yes, this can be done, how would one go about changing the bits in the configure window?

Thanks

Ron

Post by **Benj** » Wed Jan 02, 2008 6:21 pm

Hello Ron

I see what you mean now.

What you have to do is the following.

In Flowcode click on Chip -> Configure -> Switch to expert.

This will bring up the configuration options for your selected target.

Choose the configuration that you require and then click ok.

Flowcode will save the configuration so you will only have to set it once unless you change the target device.

This configuration will be inserted into the hex file ready for programming.

In MPLAB there is a tick box in the configuration settings windows that can be unticked to allow the hex file to provide the configuration rather then MPLAB.

I think that this should provide the functionality that you require.

Ron · Post by **Ron** » Thu Jan 03, 2008 3:17 am

Hello Ben,

See, I told you it was my fault. I really need to learn how to ask questions better.

Thanks, I will try it out later....

Ron

Ron · Post by **Ron** » Thu Jan 03, 2008 3:23 am

Hello Ben,

I go to Chip - Configure, I only have OK and Cancel as options. I do not see where I select Expert anywhere.

Confused????

Thank you

Ron

Post by **Benj** » Thu Jan 03, 2008 10:18 am

Hello Ron

When you click Chip -> Configure you should get the following screen.

Post by **Benj** » Thu Jan 03, 2008 10:21 am

If you do not have this screen then downloading the latest version of PPP should solve the problem for you.

Ron · Post by **Ron** » Thu Jan 03, 2008 12:47 pm

Hello Ben,

Will this work even if I do not have your programmer?

Thanks

Ron

Post by **Benj** » Thu Jan 03, 2008 1:23 pm

Hello Ron

Yes the configuration settings get embedded into the hex file. As long as your programmer is capable of using this then there should be no problem.

Ron · Post by **Ron** » Fri Jan 04, 2008 3:05 am

Hello Ben,

I installed PPP completely and I still get nothing in the Chip - Configure window when it opens.

What should I do now?

Thanks

Ron

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