For the newest commit of fenix these steps works for me to have /dev/spidev1.0 based on https://forum.khadas.com/t/vim3-ubuntu-spi/9372/2?u=chiahungmou and suggestions above.
1.Modify /fenix/linux/arch/arm64/boot/dts/amlogic/kvim3_linux.dts b/arch/arm64/boot/dts/amlogic/kvim3_linux.dts as below:
&pwm_ef {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&pwm_f_pins1>;
};
...
&spicc1 {
status = "enable";
pinctrl-names = "default";
pinctrl-0 = <&spicc1_pins>;
cs-gpios = <&gpio GPIOH_6 0>;
...
-
Run
make kernel && make debs && make -
Replace
/boot/zImageand/boot/dtb/kvim3_linux.dtbwithImageandkvim3_linux.dtbwhich are built at step 2.$scp ./fenix/linux/arch/arm64/boot/Image [email protected]:/tmp $scp ./fenix/linux/arch/arm64/boot/dts/amlogic/kvim3_linux.dtb [email protected]:/tmp $ssh [email protected] $sudo mv /tmp/Image /boot/zImage $sudo mv /tmp/kvim3_linux.dtb /boot/dtb -
Update device tree overlay.
vim /boot/env.txtto change this line: overlays=uart3 i2c3 os08a10 spi1
5.WiringPi check gpio.
` khadas@Khadas:~$ gpio readall
+------+-----+----------+------+---+----+---- Model Khadas VIM3 --+----+---+------+----------+-----+------+
| GPIO | wPi | Name | Mode | V | DS | PU/PD | Physical | PU/PD | DS | V | Mode | Name | wPi | GPIO |
+------+-----+----------+------+---+----+-------+----++----+-------+----+---+------+----------+-----+------+
| | | 5V | | | | | 1 || 21 | | | | | GND | | |
| | | 5V | | | | | 2 || 22 | P/U | | 1 | ALT1 | PIN.A15 | 6 | 475 |
| | | USB_DM | | | | | 3 || 23 | P/U | | 1 | ALT1 | PIN.A14 | 7 | 474 |
| | | USB_DP | | | | | 4 || 24 | | | | | GND | | |
| | | GND | | | | | 5 || 25 | P/U | | 1 | ALT0 | PIN.AO2 | 8 | 498 |
| | | MCU3V3 | | | | | 6 || 26 | P/U | | 1 | ALT0 | PIN.AO3 | 9 | 499 |
| | | MCUNRST | | | | | 7 || 27 | | | | | 3V3 | | |
| | | MCUSWIM | | | | | 8 || 28 | | | | | GND | | |
| | | GND | | | | | 9 || 29 | P/D | | 0 | ALT0 | PIN.A1 | 10 | 461 |
| | 18 | ADC0 | | | | | 10 || 30 | P/D | | 1 | ALT0 | PIN.A0 | 11 | 460 |
| | | 1V8 | | | | | 11 || 31 | P/D | | 0 | ALT0 | PIN.A3 | 12 | 463 |
| | 19 | ADC1 | | | | | 12 || 32 | P/D | | 0 | ALT0 | PIN.A2 | 13 | 462 |
| 506 | 1 | PIN.AO10 | ALT3 | 0 | | P/U | 13 || 33 | P/D | | 0 | ALT1 | PIN.A4 | 14 | 464 |
| | | GND3 | | | | | 14 || 34 | | | | | GND | | |
| 433 | 2 | PIN.H6 | OUT | 1 | | P/D | 15 || 35 | P/D | | 0 | ALT2 | PWM-F | 15 | 432 |
| 434 | 3 | PIN.H7 | ALT2 | 0 | | P/D | 16 || 36 | | | | | RTC | | |
| | | GND | | | | | 17 || 37 | P/D | | 0 | ALT2 | PIN.H4 | 16 | 431 |
| 497 | 4 | PIN.AO1 | ALT0 | 1 | | P/U | 18 || 38 | | | | | MCU-FA1 | | |
| 496 | 5 | PIN.AO0 | ALT0 | 1 | | P/U | 19 || 39 | P/D | | 0 | IN | PIN.Z15 | 17 | 426 |
| | | 3V3 | | | | | 20 || 40 | | | | | GND | | |
+------+-----+----------+------+---+----+-------+----++----+-------+----+---+------+----------+-----+------+
`
-
Check pins related to SPI.
VIM3 SPI: PIN37: GPIOH_4/SPIB_MOSI -> type ALT2 PIN35: PWM_F/SPIB_MISO -> type ALT2 PIN15: UARTC_RX/SPIB_SS -> type OUT PIN16: UARTC_TX/SPIB_SCLK -> type ALT2 -
Build tester and run.
cd /WiringPi_khadas/examples make spi_test_vim3 ./spi_test_vim3
MAX6675 reading temperature
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