I'm trying to communicate with a 128x64 screen on SPI (GFX-hat pimori). It seems that the device /dev/spi* does not exist, I looked at how to do it on the net, but the device refuses to be created.
Do you have an idea of the problem ?
> uname -a
Linux framboise 4.19.42-v7+ #1219 SMP Tue May 14 21:20:58 BST 2019 armv7l GNU/Li nux
> ls /dev/spi*
ls: impossible d'accéder à '/dev/spi*': Aucun fichier ou dossier de ce type (No such file or directory)
> lsmod | grep spi
spi_bcm2835 20480 0
spi_bcm2835aux 16384 0
spi_gpio 16384 0
spi_bitbang 16384 1 spi_gpio
spidev 20480 0
> grep spi /boot/config.txt
dtparam=spi=on
> gpio readall
+-----+-----+---------+------+---+---Pi 3B--+---+------+---------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
| | | 3.3v | | | 1 || 2 | | | 5v | | |
| 2 | 8 | SDA.1 | ALT0 | 1 | 3 || 4 | | | 5v | | |
| 3 | 9 | SCL.1 | ALT0 | 1 | 5 || 6 | | | 0v | | |
| 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT5 | TxD | 15 | 14 |
| | | 0v | | | 9 || 10 | 1 | ALT5 | RxD | 16 | 15 |
| 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 |
| 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | |
| 22 | 3 | GPIO. 3 | OUT | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 |
| | | 3.3v | | | 17 || 18 | 1 | OUT | GPIO. 5 | 5 | 24 |
| 10 | 12 | MOSI | ALT0 | 0 | 19 || 20 | | | 0v | | |
| 9 | 13 | MISO | ALT0 | 0 | 21 || 22 | 1 | OUT | GPIO. 6 | 6 | 25 |
| 11 | 14 | SCLK | ALT0 | 0 | 23 || 24 | 1 | OUT | CE0 | 10 | 8 |
| | | 0v | | | 25 || 26 | 1 | OUT | CE1 | 11 | 7 |
| 0 | 30 | SDA.0 | IN | 1 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 |
| 5 | 21 | GPIO.21 | OUT | 0 | 29 || 30 | | | 0v | | |
| 6 | 22 | GPIO.22 | OUT | 0 | 31 || 32 | 0 | OUT | GPIO.26 | 26 | 12 |
| 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | |
| 19 | 24 | GPIO.24 | IN | 0 | 35 || 36 | 1 | IN | GPIO.27 | 27 | 16 |
| 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 |
| | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 |
+-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+---------+------+---+---Pi 3B--+---+------+---------+-----+-----+
> grep spi /var/log/kern.log
May 24 14:20:53 framboise kernel: [ 11.645367] ads7846 spi0.1: spi0.1 supply vcc not found, using dummy regulator
May 24 14:20:53 framboise kernel: [ 11.645473] ads7846 spi0.1: Linked as a consumer to regulator.0
May 24 14:20:53 framboise kernel: [ 11.645942] ads7846 spi0.1: touchscreen, irq 166
May 24 14:20:53 framboise kernel: [ 11.648139] input: ADS7846 Touchscreen as /devices/platform/soc/3f204000.spi/spi_master/spi0/spi0.1/input/input7
May 24 14:20:53 framboise kernel: [ 12.453427] graphics fb1: fb_ili9486 frame buffer, 480x320, 300 KiB video memory, 4 KiB buffer memory, fps=33, spi0.0 at 16 MHz
> grep spi /var/log/syslog
May 24 11:38:35 framboise systemd-modules-load[110]: Inserted module 'spidev'
May 24 11:38:35 framboise systemd-modules-load[110]: Inserted module 'spi_gpio'
May 24 11:38:35 framboise systemd-modules-load[110]: Inserted module 'spi_bcm2835aux'
May 24 11:38:35 framboise kernel: [ 7.730249] ads7846 spi0.1: spi0.1 supply vcc not found, using dummy regulator
May 24 11:38:35 framboise kernel: [ 7.730646] ads7846 spi0.1: Linked as a consumer to regulator.0
May 24 11:38:35 framboise kernel: [ 7.737989] ads7846 spi0.1: touchscreen, irq 166
May 24 11:38:35 framboise kernel: [ 7.743270] input: ADS7846 Touchscreen as /devices/platform/soc/3f204000.spi/spi_master/spi0/spi0.1/input/input7
May 24 11:38:35 framboise kernel: [ 8.535664] graphics fb1: fb_ili9486 frame buffer, 480x320, 300 KiB video memory, 4 KiB buffer memory, fps=33, spi0.0 at 16 MHz
May 24 11:38:37 framboise raspi-config[341]: Checking if shift key is held down: No. Switching to ondemand scaling governor.
