I bought a kit mini210s with display S70 andCapacitive Touch Panel Controller is FT5x06, but touch screen have problem. http://www.youtube.com/watch?v=Fri73ALsqzM&feature=youtu.be This seems to be physical/electrical problem, someone help me ?
Tempting to say "just don't take your finger off the ethernet connector". Are you touching the case on the ethernet connector? Which is grounded? I would try placing the touchscreen on a metal plate ensuring that nothing on the bottom side of the touchscreen actually connects to the metal plate. Maybe, use a sheet of paper on the metal plate ... just don't short out any components on the bottom side of the screen! Then connect the metal plate to the PCB ground on the mini210, possibly best at one of the PCB mounting screw holes. Possible explanation is that your body is picking up mains hum or ?? and by grounding yourself on the ethernet connector that that interference is prevented from affecting the screen. If both units were in a metal or screened box of some sort, you may not have this problem.
Shield of conector ethernet is ground. I did the recommended, but the problem continues.
Can you power the unit from a battery pack? Then go outside away from potential interference sources in your work area and see if it behaves differently. Have you got an oscilloscope? I assume that you did not try the last suggestion, as it would require quite a bit of work. When you tried "the recommended", could you "ground" yourself on the metal plate and get it to work properly?
Based on my resistive touchscreen mini2440 experience there is a file that sets up quite a few touchscreen parameters. Are you using a default setup file or have you modified it? What touchscreen operational parameters can you control in your setup?
The test on a metal plate grounded, with batery, and outside of work area, has reduced interference: http://www.youtube.com/watch?v=zYpA7ULa-gc but, far from any source of noise the result was excellent: http://www.youtube.com/watch?v=4q1ejACkxXM even without the metal plate: http://www.youtube.com/watch?v=qHhc7xSZWtQ My body is picking up mains hum 60Hz. Setup file was not modified: linux-2.6.35.7/arch/arm/mach-s5pv210/mach-mini210.c code: #ifdef CONFIG_TOUCHSCREEN_FT5X0X #include <plat/ft5x0x_touch.h> static struct ft5x0x_i2c_platform_data ft5x0x_pdata = { .gpio_irq = S5PV210_GPH1(6), .irq_cfg = S3C_GPIO_SFN(0xf), .screen_max_x = 480, .screen_max_y = 272, .pressure_max = 255, }; #endif pressure_max parameter no have effect The problem continues.
Hi, this looks wrong for a start:
.screen_max_x = 480,
.screen_max_y = 272,
As the s70 7" screens are 800x480, unless it picks up resolution from
somewhere else and that's a fallback value? :-)
do you have any kind of control over which devices are powered where you work? it could be that some device has a cruddy cheap external psu that's causing the noise issues.
Lastly, what piece of software are you using to test the touchscreens with?
This value is overhead to 800x600 in the same file
static void __init mini210_map_io(void)
{
...
#ifdef CONFIG_TOUCHSCREEN_FT5X0X
ft5x0x_pdata.screen_max_x = lcd->width;
ft5x0x_pdata.screen_max_y = lcd->height;
#endif
I meant 800x480
I'm using Touch_Test_1.4 http://www.freewarelovers.com/android/app/touch-test
> My body is picking up mains hum 60Hz. You did verify with an oscilloscope probe on the end of your finger? Tends to suggest that you are in an environment with a lot of 60Hz floating around, the unit is not packaged correctly or conducted mains current from your power supply is getting into places where it should not. Did running it off batteries not help? The type of file I was referring to for the mini2440 is called ts.conf which has a few settings for the touchscreen. If there is a similar file for your machine it sounds like it must have the default values ... that someone else believes should work for most people.
just tested my s70 with the apk and its rock solid stable.
Have you made sure that you've pushed the connectors on fully and that the ffc cable is in straight on the connectors too? when you connect the lcd cable to the main board you should hear it click.