Forum Post: RE: tsc2048 PENIRQ keep low issue
Haibo, Let me take a close look at the schematic and I will you let you if I find anything useful to you. Andy
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo, I went through your schematic but I didn't find any obvious issue. Could you try this? Step 1: Power on your system. Step 2: Don't load the TSC2046 linux driver. Step 3: Probe the PENIRQ pin...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Andy I try this, and yes, the PENIRQ pin and X+ pin all stay high when I do not touch the screen, and these two pins will stay low when I touch the screen and become high again when the finger is...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Andy, Does the capacitance C266 necessary?
View ArticleForum Post: RE: How to design two AFE5809 for realize a doppler measurement...
Hi Chuck, In attachment, you can find my final design. Before routing it, i want to confirm with you my design. For the values of R5,11,16,18,25,31,36 and finally R38, i chose these values equal to 499...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo, I think yes. On the TSC2046EVM , we put a 10uF cap. Andy
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo, Could you show me where you got the linux driver for ads7846 ? It's been a while since I tried this linux driver. I can double check with a Linux dev kit in my office. Andy
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
(Please visit the site to view this file) the ads7846 .c comes from linux-3.14 branch, and I compare the latest version in linux-4.0, seems no obvious change. and according to my recent debug, I find...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi, Andy please ignore the upper ads7846 .c , because I add some debug code in this file. please refer to this one, this file is the original code. (Please visit the site to view this file)
View ArticleForum Post: RE: Interface AFE5808 with TSW1405
Hi Shadi, Thanks, We will incorporate this into HSDCPro for our 12-bit parts. Chuck
View ArticleForum Post: RE: AFE5801- DCLK 60 MHz or 120 MHz?
Mohit, I don't understand what you mean. Are you capturing the raw data with the FPGA DDR logic block and then post-processing in Labview? Thanks, Chuck
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo How did you know the coordinate values were wrong? Did you try drawing some pattern and show the pattern in a LCD? Andy
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo, I will try to load this driver in my office to see whether I can replicate this issue. I think your device should be good and something might be wrong in the software. Andy
View ArticleForum Post: TSC2046 strange behavior
I'm using tsc2046 to get touch input from 4-wire resistive touch panel. Situation is If i get Y axis result only, receive data is always 4095(with no touch to the panel) However, The output of tsc2046...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Andy I touch the screen, move my finger on the screen, and see the coordinate value report on the terminal don't change much, even when I move my finger from the left to the right on the screen. in...
View ArticleForum Post: Is there a way to turn off cc2540 adc AIN0 (p0_0) internal pull...
I am using CC2540 in measuring resistances under 2M. So I configured the build-in ADC to do the job. I used a variable resistor (2M ohm max) to test the hardware and software setting. At low resistance...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Haibo, I took a look at the source code of ads7846 .c. From my point of view, I don't think it is a very good Linux driver. TSC2046 is not a very complicated device and therefore the linux driver is...
View ArticleForum Post: RE: TSC2046 strange behavior
Hi JongHeon, I am not able to run your code in my office. However, I can offer you some reference code prepared by myself. It works very well with the TSC2046EVM . Attached is the reference...
View ArticleForum Post: RE: tsc2048 PENIRQ keep low issue
Hi Andy I think the reason of incorrect coordinate value is cause by the SPI bus. I got the SPI bus wave. please refer to the attach file. Now my question is that which 12 bit of the 16bit data we get...
View ArticleForum Post: TSC2046 with GVTW50SPBC1R0
I am trying to interface a TSC2046 with a GVTW50SPBC1R0 touch screen. I am having difficulty trying to figure out the proper connections. The datasheet for the GVTW50SPBC1R0 references the connections...
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