fb-tft OK

melanrz

ok,i get it but white screen after init

melanrz

somebody help spi connection with lcd spotpear 3,5
[    1.939420] sunxi_spi_chan_cfg()1355 - [spi-0] has no spi_regulator.
[    1.948838] sunxi_spi_chan_cfg()1355 - [spi-1] has no spi_regulator.
[    1.958669] spi spi0: master is unqueued, this is deprecated
[   61.591951] fbtft_device:      spidev spi0.0 33000kHz 8 bits mode=0x00
[   61.592054] fbtft_device: Deleting spi0.0
[   61.592948] flexfb spi0.0: fbtft_request_gpios: gpio_request_one('reset'=25) failed with -22
[   61.592962] flexfb spi0.0: fbtft_free_gpios()
[   61.592973] flexfb spi0.0: fbtft_free_gpios(): gpio_free('reset'=25)
[   61.593342] [<bf1cbc14>] (flexfb_probe_common+0x720/0x81c [flexfb]) from [<bf1cbd50>] (flexfb_probe_spi+0x1c/0x20 [flexfb])
[   61.593369] [<bf1cbd50>] (flexfb_probe_spi+0x1c/0x20 [flexfb]) from [<c043627c>] (spi_drv_probe+0x28/0x2c)
[   61.593394] [<c043627c>] (spi_drv_probe+0x28/0x2c) from [<c040a2c0>] (driver_probe_device+0xd8/0x1fc)
[   61.593521] [<c0407cd8>] (device_add+0x3ec/0x574) from [<c0437048>] (spi_add_device+0xdc/0x12c)
[   61.593542] [<c0437048>] (spi_add_device+0xdc/0x12c) from [<c0437128>] (spi_new_device+0x90/0xb0)
[   61.593576] [<c0437128>] (spi_new_device+0x90/0xb0) from [<bf1db420>] (fbtft_device_init+0x420/0x5dc [fbtft_device])
[   61.593697] flexfb spi0.0: fbtft_free_gpios(): gpio_free('dc'=24)
[   61.594004] [<bf1cbc14>] (flexfb_probe_common+0x720/0x81c [flexfb]) from [<bf1cbd50>] (flexfb_probe_spi+0x1c/0x20 [flexfb])
[   61.594030] [<bf1cbd50>] (flexfb_probe_spi+0x1c/0x20 [flexfb]) from [<c043627c>] (spi_drv_probe+0x28/0x2c)
[   61.594053] [<c043627c>] (spi_drv_probe+0x28/0x2c) from [<c040a2c0>] (driver_probe_device+0xd8/0x1fc)
[   61.594177] [<c0407cd8>] (device_add+0x3ec/0x574) from [<c0437048>] (spi_add_device+0xdc/0x12c)
[   61.594199] [<c0437048>] (spi_add_device+0xdc/0x12c) from [<c0437128>] (spi_new_device+0x90/0xb0)
[   61.594231] [<c0437128>] (spi_new_device+0x90/0xb0) from [<bf1db420>] (fbtft_device_init+0x420/0x5dc [fbtft_device])
[   61.594447] flexfb: probe of spi0.0 failed with error -22
[   61.594514] fbtft_device:      flexfb spi0.0 16000kHz 8 bits mode=0x00

komw

melanrz replied at 2016-2-21 09:26
somebody help spi connection with lcd spotpear 3,5
[    1.939420] sunxi_spi_chan_cfg()1355 - [spi-0] ...

I have the same errors.
All time I'm trying to modprobe I've get an error with gpio_request: gpio-25 (fb_ili9341) status -22
fb_ili9341 spi0.0: fbtft_request_gpios: gpio_request_one('reset'=25) failed with -22


I've compiled my own kernel with SPI and FBTFT support from this thread instructions

melanrz

try reset on 20 and dc on 18

beee

SPI is set in script.bin?
sunxi-gpio module is unloaded?

redo

http://appdictive.dk/blog/projec ... ay_on_raspberry_pi/
other method on rpi

melanrz

beee replied at 2016-3-24 05:34
SPI is set in script.bin?
sunxi-gpio module is unloaded?

i have same lcd as yours,tested with arduino,connected as described but stil white screen,i used loboris img with compiled fbtft,an armbian with fbtft support ready to go,module load but still white screen.Please share your script.bin

beee

According to your post above you try SPI display. My parallel is. Script.bin not have modified. Just as root: rmmod gpio_sunxi. You was created new FB device? If yes, you tried something on it show? What he says dmesg?

melanrz

https://www.youtube.com/watch?v=H7NKQ_STfg0

crossmax

Hi,
I'm trying to show something in a 2.2" tft display (ILI9340) but I can't.
I tried with instructions written by snowbody and plugging reset and dc in PA7 and PA6 respectively.
I tried with fbview.py that is located in the attached file by beee (goo.gl/rokH6M) but it does not work either. This message returns
Using extension png for identity.
Detected type: PNG
sh: 1: ppmtofb: not found
Scaling /tmp/fbview.1496157891.10503.ppm (from 1280 x 1024)
Displaying image
Traceback (most recent call last):
  File "fbview.py", line 331, in <module>
    sys.exit(main())
  File "fbview.py", line 317, in main
    show_file(x, fp, grayscale, width, height, maxcolors)
  File "fbview.py", line 187, in show_file
    fp.write(txt)
IOError: [Errno 32] Broken pipe


Definitely, Can anyone write a brief guide? If someone made a video tutorial would be great!