[Arm-netbook] adafruit spi lcd hx8357d and arduino uno

[Luke Kenneth Casson Leighton]

.... arrived today, and were up and running, working perfectly, in
under 15 minutes:
http://git.rhombus-tech.net/?p=eoma-firmware.git;a=tree;f=eoma68/arduino_uno_spi_test

i used a makefile that was easily found with a google search "debian
arduino uno makefile", followed the instructions _in_ the makefile,
created a blink test, ran it, ran "make upload" and it worked. total
time: well under 3 minutes. next was the SPI-based LCD, soldering
took a few minutes, copying the library files into the main directory
a few more - done.

i've now modified the adafruit source code so that it can do 9-bit SPI
bit-banging, by setting "IM1=0" (shorting that to ground) and i'm now
in a position to begin two-way testing of the adafruit LCD with an
STM32F072, and the yunlea HX8357D LCD with the arduino uno.

this is a heck of a lot quicker than messing about with both unknown
hardware and unknown software.

l.

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[Hrvoje Lasic]

Looks good, what is the price for this lcd?

Post by Luke Kenneth Casson Leighton
.... arrived today, and were up and running, working perfectly, in
http://git.rhombus-tech.net/?p=eoma-firmware.git;a=tree;f=eoma68/arduino_uno_spi_test
i used a makefile that was easily found with a google search "debian
arduino uno makefile", followed the instructions _in_ the makefile,
created a blink test, ran it, ran "make upload" and it worked. total
time: well under 3 minutes. next was the SPI-based LCD, soldering
took a few minutes, copying the library files into the main directory
a few more - done.
i've now modified the adafruit source code so that it can do 9-bit SPI
bit-banging, by setting "IM1=0" (shorting that to ground) and i'm now
in a position to begin two-way testing of the adafruit LCD with an
STM32F072, and the yunlea HX8357D LCD with the arduino uno.
this is a heck of a lot quicker than messing about with both unknown
hardware and unknown software.
l.
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[Luke Kenneth Casson Leighton]

Post by Hrvoje Lasic
Looks good, what is the price for this lcd?

from yunlea? $25 including a capacitive touchscreen pre-glued as a single unit.

from adafruit? $40 including a *resistive* touchscreen on the front,
pre-glued as a single unit.

the yunlea has 2 connectors, a 39-pin 0.3mm pitch staggered FPC and a
12-pin 0.5mm pitch connector for the touchpanel.

the adafruit one has all sorts of break-out pins (2.54mm pitch), has
level shifters on-board (for when you use it in 8-bit parallel mode
and the incoming voltage is different from what the LCD prefers), as
well as an LCD backlight current-controlled step-up converter already
on-board.

l.

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