HP97 The journey begins

[teenix]

Hi all,

With the motor running, the first print output to the print head as seen on my scope.

The lower part shown the PWM overlaid on each pixel which keeps the print intensity constant with changes in battery voltage. You can also see the staggering of the pixel lines.

It looks backward because the printer prints right to left.

The key buffer is also working. I can simulate pressing PrintX while the printer is active and it keeps printing until the buffer is empty.

Its somewhat interesting in that it takes the PIC around 2.7uS to process and output the data to the printer as the carriage moves across. The PWM is automatic and needs no code intervention.

Lots to go yet.

cheers

Tony