Hey John,
Yes, a lot of care should be taken when operating with the external events of the ADS7843 as it is very sensitive.
You can find more info about keeping the analog ground and digital ground separate in this apps note: https://www.ti.com/lit/an…
Part Number: ADS7843 On my ADS7843 based systems, I notice that the raw X value changes with pressure. Specifically, near the left edge of the screen, increasing pressure causes the raw X value to decrease, when near the right edge of the screen, increasing…
Part Number: ADS7843 Hi support team.
I have some question from my customer below.
- Are settings immediately after startup of PD0 / PD1 "00" or "11"?
I would like to know the initial settings of PDx.
- Is there a limit to the VCC…
Part Number: ADS7843 We are using ADS7843 as a touchscreen controller. The IC does not give proper touch co-ordinates at least 1 time per 20 detection cycles. We have made sure that the routing of the IC is according to the application note provided by…
Part Number: ADS7843 Other Parts Discussed in Thread: ADS7845 Hi,
I would like to ask a few questions about the ADS7843 EVB circuit:
1. Are the Analog and Digital Workspace in the EVB circuit connected to the breadboard?
2. The Analog part of the circuit…
Part Number: ADS7843 Hello,
We have an issue with some resistive touch screens that are being controlled by the Texas Instrument ADS7843 component.
The touch screens being tested are faulty: the resistive values of the X axis on the right side got higher…
Hi Kanchan,
So to confirm, you're receiving random outputs from the ADS7843, even when holding your finger/pen in a constant location? Could you share a capture of the SPI communication while this is happening?
Also, you may want to consider a slightly…
Hi Swapna,
Let's step back, why do you connect the touch screen interrupt to the I/O expander not directly to an AM62x GPIO pin? It would simplify the software.
swapna I said: ads7843: ads7843@0 { reg = <0>; /* CS0 */ compatible = "ti,ads7843…
Part Number: ADS7843 Other Parts Discussed in Thread: ADS7845 , TSC2004 , TSC2005 , TSC2007 , TSC2003 Hello team,
I'm looking for a controller for resistivity touch screen with 4/5 wires which has Linux drivers (welcome are also for Windows EC7 ARM and X86…