DPI Adapter prototype

[tinkerBOY]

I finally had time to solder the parts and DPI adapter prototype. It’s working fine and the DPI screen looks way way better than composite.







More pictures at DPI Adapter + Game Boy Controller = AIO

[VeteranGamer]

great job....
looks good....

i could be wrong.....
i see one negative (i could be missing something).....

you don't have access to any of the test points on the rear, more importantly for the USB connection....
(i appreciate you still have access to the port)



.

[tinkerBOY]

great job....
looks good....

i could be wrong.....
i see one negative (i could be missing something).....

you don't have access to any of the test points on the rear, more importantly for the USB connection....
(i appreciate you still have access to the port)



.

Yeah I just made this board to test the DPI interface but I will absolutely be including a way to access the USB data pads for the final board.

[DieselDummy]

Looks like the tinkerboy all in one is right around the corner

[sgtgrumbles]

Nice work! This will take many custom builds to the next level.

If possible, please support using a wheel pot to adjust LCD brightness ala OG DMG

[superjoltman]

So I've been working on your first setup for 24-bit with just the first adapter but it takes the GPIO pins that are used for sound that I would normally wire up to my Helder board. I notice in this one you have a pi zero instead of the 3, I know you said this is just for testing but in my scenario would you use a usb sound card to get around this? Been reading about re-purposing some of the the GPIO pins that look like they have Alt functions that do PW0 and PW1 but haven't messed with it yet.

[tinkerBOY]

So I've been working on your first setup for 24-bit with just the first adapter but it takes the GPIO pins that are used for sound that I would normally wire up to my Helder board. I notice in this one you have a pi zero instead of the 3, I know you said this is just for testing but in my scenario would you use a usb sound card to get around this? Been reading about re-purposing some of the the GPIO pins that look like they have Alt functions that do PW0 and PW1 but haven't messed with it yet.

I designed the adapter so you can still use pwm sound. It works on both pi zero and 3. On the Raspberrypi.org DPI documentation there are two ways to get 18-bit and one them doesn't use gpio18 and gpio19 which can be used as pwm0 and pwm1. You just have to edit the 24bit overlay and recompile.

[superjoltman]

Geeze, completely missed that for the 18 bit. Thanks!!

[sgtgrumbles]

So I've been working on your first setup for 24-bit with just the first adapter but it takes the GPIO pins that are used for sound that I would normally wire up to my Helder board. I notice in this one you have a pi zero instead of the 3, I know you said this is just for testing but in my scenario would you use a usb sound card to get around this? Been reading about re-purposing some of the the GPIO pins that look like they have Alt functions that do PW0 and PW1 but haven't messed with it yet.

I designed the adapter so you can still use pwm sound. It works on both pi zero and 3. On the Raspberrypi.org DPI documentation there are two ways to get 18-bit and one them doesn't use gpio18 and gpio19 which can be used as pwm0 and pwm1. You just have to edit the 24bit overlay and recompile.

FYI - I2C from the camera for ADC sound would be preferable to PWM or possibly even USB (to disable USB all together and save power)

for Pi Zero and Zero W dtoverlay=i2c0-bcm2708,pins_28_29
for Pi 3 dtoverlay=i2c0-bcm2708,pins_44_45

Although, I don't know for a fact that anyone has demonstrated this working... just rumors.

[Zhuraj]

Hi. I got my Adapter today and i Wonder if it's possible to use my safe shutdown board with it?
I have this one :https://sudomod.com/forum/viewtopic.php?f=38&t=2260