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by MdeJong
Tue Dec 10, 2013 8:30 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Lcd-display shows up with i2cdetect, but I2C not working
Replies: 20
Views: 5841

Re: Lcd-display shows up with i2cdetect, but I2C not working

Hello, I had the same problem. The problem is that the RPi has a 3,3 volt I2C bus, buit the Display is 5 volt power and therefour it has a 5volt I2C bus. I added a I2C level shifter to make a 3,3volt I2C bus and a 5volt I2C bus. I used the following chip: http://www.ti.com/product/pca9306 Regards Ma...
by MdeJong
Thu Jul 18, 2013 12:12 pm
Forum: Deutsch
Topic: RPi kaputt?
Replies: 14
Views: 6436

Re: RPi kaputt?

Hallo,

Zur SD karte, hast denn write protect schalter gechecked?

wann passiert wenn die das Flachbandkabel von RPi trennst?

Du hast kein Kurzschluss gelötet?

Grüße Mark,
by MdeJong
Thu Jul 18, 2013 11:01 am
Forum: Other projects
Topic: STM32F4DIS-LCD, can this be interfaced with a RasPi?
Replies: 2
Views: 1105

Re: STM32F4DIS-LCD, can this be interfaced with a RasPi?

Hello,

I have such a display, and it can be reconfigurated to 3 wire SPI mode.
You will have to remove 2 resistors (R5 and R6) and mount them on position R1 and R2

I will try it and report if it works.

Regards Mark,
by MdeJong
Tue Jul 02, 2013 8:06 pm
Forum: Python
Topic: 20x4 i2c lcd lines out of order.
Replies: 23
Views: 25970

Re: 20x4 i2c lcd lines out of order.

Hello, I had the same problem with the i2c backpack and a 6x20 LCD: http://learn.adafruit.com/i2c-spi-lcd-backpack You will need a level convert for the I2C bus. The raspberry PI is 3,3 Volt, but the display needs 5 volt. After I used the P82B96 Level converter it is working. See the Fig.10 on page ...

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