Controlling PMP on P24FJ128GA010

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Controlling PMP on P24FJ128GA010

Forum: Open Discussion

Creator: Robert Onslow

Created: 2015-08-25

Updated: 2015-08-25

Robert Onslow - 2015-08-25

I have FF up and running on an Explorer 16 board. No problem writing to PortA, and lighting the LEDs. Great.

Now I am trying to control the LCD. The first step is to write 0x8383 to PMCON which is at 0x0600
I try: $0600 constant pmcon
$8383 pmcon !

However I am not reading back the value from the register. When I do pmcon @ . I see 0x0000

Any clues as to why this might be. The LCD code in C is executing correctly.

Robert

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Mikael Nordman - 2015-08-25

FF disables all peripherals at startup to conserve power.
You need to find the correct PMDx register and enable the peripheral.

I really need to add this info to the user guide...

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Mikael Nordman - 2015-08-25

$774 8 bclr ( PMD3 PMPMD bclr )

should enable the parallell port peripheral.

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- Robert Onslow - 2015-08-25
  
  Thanks Mikael. Works.
  
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