Falling at the first hurdle

[Clive Eisen]

I have a working waveshare pi hat Waveshare 2.13 inch black, white ( 250 x 122 with partial update)

The sample C from waveshare works fine

HiPi is all installed and gives no errors

A tiny test program runs but does nothing (nor does any other sample I try)

#!/usr/bin/env perl

use HiPi qw( :epaper :rpi );

use HiPi::Interface::EPaper;

my $epd = HiPi::Interface::EPaper->new(

    type       => EPD_WS_2_13_250_X_122_A,

);

$epd->draw_logo;

$epd->display_update;

Anyone know what I'm doing wrong?

[Mark Dootson]

Hi,

Your script works OK for me - but my 2.13 inch black, white ( 250 x 122
with partial update) is several years old now.

I seem to recall that the Waveshare examples use the bcm2835 library and
there are some compatibility issues using the SPI functions in that
library and the kernel SPI device driver that HiPi uses.

I think you have to use one or the other.
Reboot the pi and try the script without running the Waveshare example
on the machine.
It should work

Let me know if it doesn't

[Clive Eisen]

Hi Mark,

Thank you for the swift response.

Sadly, no that does not work.

It runs - no errors as I said - and no changes or flashing on the screen even after a clean boot.

Is there any debugging I can do…..?

Kind regards,

[Clive Eisen]

Hi Mark,

Thank you for the swift response.

Sadly, no that does not work.

It runs - no errors as I said - and no changes or flashing on the screen even after a clean boot.

Is there any debugging I can do…..?

Kind regards,

—
C

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[Mark Dootson]

Hi,

I'd guess you have a V2  2.13 display. As noted in the Waveshare docs V2 uses a different controller so the HiPi code written for the V1 controller does not work.

I'll take a look at what the differences are.

Mark

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