Hi,
i have trouble with calibration touch.
I installed the drivers as described in the procedure.
While for calibration I used this procedure:
At the end of this procedure the touchscreen is not correctly calibrated.
Model: Raspberry pi 3B +
Firmware: Raspbian Buster - Linux version 4.19.97-v7+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1294 SMP Thu Jan 30 13:15:58 GMT 2020
3.5 tft drivers used: PI3/4.19.97
My configuration file.
Config.txt
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
# uncomment for composite PAL
#sdtv_mode=2
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
dtparam=spi=on
# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
#max_framebuffers=2
[all]
#dtoverlay=vc4-fkms-v3d
dtparam=i2c_vc=on
#dtoverlay=vc_mipi_imx327c
#dtoverlay=vc_mipi_ov9281
#Uncomment this to enable debug uart!
#enable_uart=1
#Uncomment this to enable DS3231 RTC !
dtoverlay=i2c-rtc,ds3231
#Uncomment this to enable ft6236 TFT capcitive touch screen !
dtoverlay=lcd35_spi,fps=60,speed=63000000,touch-swapxy=1,touch-invx=1
#Uncomment this to enable ft6x06 TFT capacitive touch screen!
#dtoverlay=lcd35_spi_ft6x06,fps=60,speed=32000000
#Uncomment this to enable ads7846 resistive touchscreen!
dtoverlay=ads7846,cs=1,penirq=17,penirq_pull=2,speed=1000000,keep_vref_on=1,swapxy=1,pmax=255,xohms=60,xmin=200,xmax=3900,ymin=200,ymax=3900
cmdline.txt
console=serial0,115200 console=tty1 root=PARTUUID=ea7d04d6-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
99-calibration.conf
Section "InputClass"
Identifier "calibration"
MatchProduct "generic ft5x06 (11)"
Option "Calibration" "22 409 160 468"
Option "SwapAxes" "0"
EndSection
Can you help me please?
Dear Customer,
Could you confirm with me that is Resistance or capacitors touch?
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