I am getting "FATAL: Module ads7846_device not found."

[Ferite]

Hi.

I have installed a HY28A display to my Raspberry Pi B+, and I am having problems getting the Touchpanel to work. As the TFT worked without problems with the standard Foundation image, I just compiled the touch driver (runned make in the ads7846_device directory) and then installed them.

As I have not clear how installed then I just copied the resulting ads7846_device.ko in /lib/modules/3.18.0-trunk-rpi/kernel, and then runned $depmod in that directory. Then I tried to run the instruction in https://github.com/notro/fbtft/wiki/Touchpanel:

$sudo modprobe ads7846
Seems to work ok.

$sudo modprobe ads7846_device
Produces "FATAL: Module ads7846_device not found."

If I run:

$lsmod

I get ads7846 listed (not ads7846_device, off course) .

If I run:

$dmesg | grep -i ads7846

I don't get any message.

I hope I can get some help about what I am doing wrong.

Thanks.

[notro]

The latest kernel doesn't have ads7846_device anymore. The same can be achieved with a Device Tree overlay. Lookup ads7846-overlay in /boot/overlays/README
I'll make a note on that wiki page.

[Ferite]

Hi Notro.

I have the TS working now, by loading ads7846-overlay.dtb. The only issue I still having is that in order to avoid having the X axe inverted, I have to to execute the comand:

$ DISPLAY=:0 xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axis Inversion' 1 0

It works ok if I run this command from a terminal within the session. However if I add this line to /etc/X11/xinit/xinitrc (before $. /etc/X11/Xsession), it has no effect.

Where else can I place this command?.

Thanks again for your help, and all the work you have put on fbtft.

[notro]

Try /etc/xdg/lxsession/LXDE-pi/autostart

You can also use xinput-calibrator: https://github.com/notro/fbtft/wiki/FBTFT-on-Raspian#x-windows-touch-calibration

[johnnyquad]

Hi folks,
I have a new Waveshare 4 inch Spotpear

Screen works fine but can't get the touch bit working.
things done so far

end of config.txt:
device_tree=bcm2708-rpi-b.dtb
dtparam=spi=on
dtparam=i2c_arm=on

device_tree=ads7846-overlay.dtb
dtoverlay=ads7846,cs=1, penirq=17, speed=500000, swapxy=0, pmax=255, xohms=100, xmin=200, xmax=3900, ymin=200, ymax=3900, verbose=3

end of /etc/modules:
snd-bcm2835
spi-bcm2708
i2c-bcm2708
i2c-dev

flexfb nobacklight width=480 height=320 regwidth=16 init=-1,0xb0,0x0,-1,0x11,-2,250,-1,0x3A,0x55,-1,0xC2,0x44,-1,0xC5,0x00,0x00,0x00,0x00,-1,0xE0,0x0F,0x1F,0x1C,0x0C,0x0F,0x08,0x48,0x98,0x37,0x0A,0x13,0x04,0x11,0x0D,0x00,-1,0xE1,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0xE2,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0x36,0x28,-1,0x11,-1,0x29,-3
fbtft_device debug=3 rotate=0 name=flexfb speed=16000000 gpios=reset:25,dc:24
ads7846

reboot
dmesg:
[ 11.743981] bcm2708_spi bcm2708_spi.0: SPI Controller at 0x20204000 (irq 80)
[ 11.746435] bcm2708_spi bcm2708_spi.0: SPI Controller running in dma mode
[ 11.905681] bcm2708_i2c_init_pinmode(1,2)
[ 11.908042] bcm2708_i2c_init_pinmode(1,3)
[ 11.914519] bcm2708_i2c bcm2708_i2c.1: BSC1 Controller at 0x20804000 (irq 79) (baudrate 100000)
[ 12.083345] i2c /dev entries driver
[ 12.172550] pcm512x 1-004d: Failed to reset device: -5
[ 12.175001] pcm512x: probe of 1-004d failed with error -5
[ 12.243136] pcm512x 1-004c: Failed to reset device: -5
[ 12.245665] pcm512x: probe of 1-004c failed with error -5
[ 12.298376] fbtft: module is from the staging directory, the quality is unknown, you have been warned.
[ 12.314008] flexfb: module is from the staging directory, the quality is unknown, you have been warned.
[ 12.437981] fbtft_device: module is from the staging directory, the quality is unknown, you have been warned.
[ 12.447194] fbtft_device: SPI devices registered:
[ 12.449740] fbtft_device: spidev spi0.0 500kHz 8 bits mode=0x00
[ 12.452155] fbtft_device: spidev spi0.1 500kHz 8 bits mode=0x00
[ 12.454812] fbtft_device: 'fb' Platform devices registered:
[ 12.457070] fbtft_device: bcm2708_fb id=-1 pdata? no
[ 12.459400] fbtft_device: Deleting spi0.0
[ 12.465511] flexfb spi0.0: fbtft_request_gpios: 'reset' = GPIO25
[ 12.467805] flexfb spi0.0: fbtft_request_gpios: 'dc' = GPIO24
[ 12.469956] flexfb spi0.0: flexfb_verify_gpios_dc()
[ 12.472058] flexfb spi0.0: fbtft_init_display()
[ 12.492581] flexfb spi0.0: fbtft_reset()
[ 12.629637] flexfb spi0.0: init: write(0xB0) 0x00
[ 12.631890] flexfb spi0.0: init: write(0x11)
[ 12.634065] flexfb spi0.0: init: mdelay(250)
[ 12.885821] flexfb spi0.0: init: write(0x3A) 0x55
[ 12.887928] flexfb spi0.0: init: write(0xC2) 0x44
[ 12.889989] flexfb spi0.0: init: write(0xC5) 0x00 0x00 0x00 0x00
[ 12.892078] flexfb spi0.0: init: write(0xE0) 0x0F 0x1F 0x1C 0x0C 0x0F 0x08 0x48 0x98 0x37 0x0A 0x13 0x04 0x11 0x0D 0x00
[ 12.895954] flexfb spi0.0: init: write(0xE1) 0x0F 0x32 0x2E 0x0B 0x0D 0x05 0x47 0x75 0x37 0x06 0x10 0x03 0x24 0x20 0x00
[ 12.899769] flexfb spi0.0: init: write(0xE2) 0x0F 0x32 0x2E 0x0B 0x0D 0x05 0x47 0x75 0x37 0x06 0x10 0x03 0x24 0x20 0x00
[ 12.903676] flexfb spi0.0: init: write(0x36) 0x28
[ 12.905705] flexfb spi0.0: init: write(0x11)
[ 12.907583] flexfb spi0.0: init: write(0x29)
[ 13.078578] flexfb spi0.0: Display update: 1772 kB/s (169.165 ms), fps=0 (0.000 ms)
[ 13.159816] graphics fb1: flexfb frame buffer, 480x320, 300 KiB video memory, 4 KiB DMA buffer memory, fps=50, spi0.0 at 16 MHz
[ 13.164313] fbtft_device: GPIOS used by 'flexfb':
[ 13.165935] fbtft_device: 'reset' = GPIO25
[ 13.167631] fbtft_device: 'dc' = GPIO24
[ 13.169160] fbtft_device: SPI devices registered:
[ 13.170941] fbtft_device: spidev spi0.1 500kHz 8 bits mode=0x00
[ 13.174404] fbtft_device: flexfb spi0.0 16000kHz 8 bits mode=0x00
[ 22.983120] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[ 24.524072] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
[ 33.812581] Adding 102396k swap on /var/swap. Priority:-1 extents:2 across:2134012k SSFS

$sudo vcdbg log msg

001068.180: Read command line from file 'cmdline.txt'
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait fbtft_device.custom fbtft_device.name=flexfb fbtft_device.gpios=dc:24,reset:25 fbtft_device.bgr=1 fbtft_device.speed=16000000 fbcon=map:10 fbcon=font:ProFont6x11 logo.nologo dma.dmachans=0x7f35 console=tty1 consoleblank=0 fbtft_device.fps=50 fbtft_device.rotate=0

001069.109: Loading 'kernel.img' from SD card
001301.938: Kernel trailer DTOK property says yes
001302.148: Loading 'ads7846-overlay.dtb' from SD card
001310.954: dtparam: spi=on
001311.235: Unknown param 'spi' - ignored
001311.259: dtparam: i2c_arm=on
001311.539: Unknown param 'i2c_arm' - ignored
001319.096: Loaded overlay 'ads7846'
001324.610: dterror: can't find symbol 'spi0'
001324.627: dtoverlay_merge_overlay('ads7846') failed - err -1
001326.027: gpioman: gpioman_get_pin_num: pin SDCARD_CONTROL_POWER not defined
002728.924: vchiq_core: vchiq_init_state: slot_zero = 0x57800000, is_master = 1
002733.202: hdmi: HDMI:hdmi_get_state is deprecated, use hdmi_get_display_state instead
002737.890: gpioman: gpioman_get_pin_num: pin LEDS_RUNNING not defined
002737.918: gpioman: gpioman_get_pin_num: pin LEDS_NAND_ACTIVITY not defined
002737.942: gpioman: gpioman_get_pin_num: pin LEDS_USB_ACTIVITY not defined
002737.964: gpioman: gpioman_get_pin_num: pin LEDS_FATAL_ERROR not defined
002737.984: gpioman: gpioman_get_pin_num: pin LEDS_APP_OK not defined
002738.004: gpioman: gpioman_get_pin_num: pin LEDS_APP_FAILED not defined
002738.026: gpioman: gpioman_get_pin_num: pin LEDS_HDCP_AUTH not defined
002738.047: gpioman: gpioman_get_pin_num: pin LEDS_HDCP_UNAUTH not defined
002738.067: gpioman: gpioman_get_pin_num: pin LEDS_HDMI_ON not defined
002738.087: gpioman: gpioman_get_pin_num: pin LEDS_DVI_ON not defined
002738.109: gpioman: gpioman_get_pin_num: pin LEDS_HDMI_HPD_UP not defined
002738.131: gpioman: gpioman_get_pin_num: pin LEDS_REMOTE_CONTROL not defined
002738.154: gpioman: gpioman_get_pin_num: pin LEDS_ARM_CONTROLLED not defined

so it looks like the message dtoverlay_merge_overlay('ads7846') failed - err -1 is failing and there also is another error line in there:
dterror: can't find symbol 'spi0'

I don't know what to try next although lsmod does show the module is loaded it just isn't being used by anything and there is no INPUT driver and no touch control.

$lsmod
Module Size Used by
ads7846 10632 0
fbtft_device 34613 0
flexfb 14438 2
fbtft 34450 2 flexfb,fbtft_device
syscopyarea 3153 1 fbtft
sysfillrect 3584 1 fbtft
sysimgblt 2278 1 fbtft
fb_sys_fops 1565 1 fbtft
snd_soc_wm8804 8225 0
snd_soc_pcm512x_i2c 2130 0
snd_soc_tas5713 5866 0
snd_soc_pcm512x 8508 1 snd_soc_pcm512x_i2c
regmap_spi 2307 1 snd_soc_wm8804
regmap_i2c 2944 3 snd_soc_wm8804,snd_soc_pcm512x_i2c,snd_soc_tas5713
i2c_dev 6713 0
i2c_bcm2708 6200 0
spi_bcm2708 8684 0
snd_bcm2835 21157 0
snd_soc_bcm2708_i2s 7515 0
regmap_mmio 3548 1 snd_soc_bcm2708_i2s
snd_soc_core 174135 4 snd_soc_pcm512x,snd_soc_wm8804,snd_soc_tas5713,snd_soc_bcm2708_i2s
snd_compress 8714 1 snd_soc_core
snd_pcm_dmaengine 5850 1 snd_soc_core
snd_pcm 90786 4 snd_bcm2835,snd_soc_wm8804,snd_soc_core,snd_pcm_dmaengine
snd_seq 61089 0
snd_seq_device 7205 1 snd_seq
snd_timer 22990 2 snd_pcm,snd_seq
evdev 11020 4
snd 66285 7 snd_bcm2835,snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_seq_device,snd_compress

Any help greatly received

john

[Ferite]

Hi John. I am not very advanced fbtft or Linux user but here are my recomendations:

• Begin with a clean RPi fundation image on your SD.
• From the .dts Generate the .dtb file. The .dts is here:

https://github.com/raspberrypi/linux/blob/rpi-3.18.y/arch/arm/boot/dts/ads7846-overlay.dts

the instructions for compiling the dtb are here:

https://github.com/notro/fbtft/wiki/FBTFT-RPI-overlays

• Copy the resulting .dtb to /boot/overlays
• Add to /boot/config.txt the dtoverlay (dtoverlay=ads7846,cs=1...) line.
• My config.txt only has uncommented "dtparam=spi=on" and "dtoverlay" lines.

[johnnyquad]

@Ferite
Thanks for the reply
Downloaded the compiler and compiled from source..
all was still the same :-(
It turns out I needed to comment out the line "device_tree=ads7846-overlay.dtb" in my config.txt file.
I also put in "dtdebug=1" in the config.txt file this gives a load of debug info when you run $sudo vcdbg log msg.

config.txt

dtdebug=1
dtparam=i2c_arm=on
dtparam=spi=on
dtoverlay=ads7846,cs=1, penirq=17, speed=500000, swapxy, pmax=255, xohms=100, xmin=200, xmax=3900, ymin=200, ymax=3900

Anyway all working now