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by tungl
Thu Dec 17, 2015 5:35 pm
Forum: Troubleshooting
Topic: Cannot calibrate ads7846 touch display
Replies: 2
Views: 1566

Re: Cannot calibrate ads7846 touch display

D'oh. I just realized that Sainsmart provides a Raspbian image (which doesn't use the overlays yet, though) that provides the necessary configuration. I had a look into that and altered my config.txt accordingly: dtoverlay=ads7846,penirq=25,cs=0,xohms=150,speed=100000,pmax=255,xmin=176,xmax=3913,ymi...
by tungl
Thu Dec 17, 2015 4:42 pm
Forum: Troubleshooting
Topic: Cannot calibrate ads7846 touch display
Replies: 2
Views: 1566

Cannot calibrate ads7846 touch display

Hi everyone, I've recently bought the 7" Touch Display from sainsmart.com. I've added dtoverlay=ads7846-overlay,penirq=25,cs=0,xohms=100 to my config.txt and calibrated it using ts_calibrate. I could click all five crosshairs and thought I'd be done. I've then run ts_test to check, only to find that...
by tungl
Wed Jan 29, 2014 2:31 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI driver latency and a possible solution
Replies: 241
Views: 136774

Re: SPI driver latency and a possible solution

Are there any news regarding this topic? I've just tried to compile the kernel with this patch which ended like this when I tried to compile: CC arch/arm/mach-bcm2708/bcm2708.o arch/arm/mach-bcm2708/bcm2708.c: In function ‘bcm2708_restart’: arch/arm/mach-bcm2708/bcm2708.c:675:2: warning: passing arg...
by tungl
Mon Jan 27, 2014 1:45 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: New to SPI - How to read data
Replies: 1
Views: 1576

New to SPI - How to read data

Hi, a few days ago, I've bought a small 2" TFT display with an ILI9341 controller. In my case it's configured to use a four-pin SPI interface. As a start I'm trying to read the manufacturer ID, just to make sure the SPI connection is working. The procedure is described in the data sheet on page 91. ...

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