Arduino SPI pinmux error

andyliao5555 commented 1 year ago

I made an OS by myself, which is V01.03.01-213-g7ffd195, when I use the iot2050setup tool to configure the Arduino SPI pinmux, the SPI is not available. I connected the IO11-IO12 which means loopback test. On V01.03.01-213-g7ffd195:

iot2050setup->Peripherals->Configure Arduino I/O->Enable SPI on IO0-IO3

print pincontroller: root@iot2050-debian:/# root@iot2050-debian:/# busybox devmem 0x4301C09C 0x00010000 root@iot2050-debian:/# busybox devmem 0x4301c094 0x00050000 root@iot2050-debian:/# busybox devmem 0x4301c098 0x00050000 root@iot2050-debian:/# busybox devmem 0x4301c090 0x00050007 root@iot2050-debian:/#

do the spi loopback test: root@iot2050-debian:/home# ./spidev_test -D /dev/spidev0.0 -v spi mode: 0x0 bits per word: 8 max speed: 500000 Hz (500 KHz) TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@....▒..................▒. RX | 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D 0D | ................................ root@iot2050-debian:/home#

we can see from the result，the spi loopback failed, RX and TX not the same. I checked the device tree from k3-am65-iot2050-common.dtsi, found the spi pinmux was wrong, 7 was GPIO. d13_spi0_clk: d13-spi0-clk { pinctrl-single,pins = < / (Y1) MCU_SPI0_CLK / AM65X_WKUP_IOPAD(0x0090, PIN_INPUT, 7)

; };

d13_gpio: d13-gpio {
    pinctrl-single,pins = <
        /* (Y1) WKUP_GPIO0_48 */
        AM65X_WKUP_IOPAD(0x0090, PIN_INPUT, 7)

so I changed the spi clk pincontroller by busybox devmem 0x4301c090 32 0x00050000 and do the test again: root@iot2050-debian:/home# ./spidev_test -D /dev/spidev0.0 -v spi mode: 0x0 bits per word: 8 max speed: 500000 Hz (500 KHz) TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@....▒..................▒. RX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@....▒..................▒. root@iot2050-debian:/home#

it works!

jan-kiszka commented 1 year ago

Same question here: regression of https://github.com/siemens/meta-iot2050/commit/d8af4f999cd6999a68872d15060bd69d213c4130?

andyliao5555 commented 1 year ago

Same question here: regression of d8af4f9?

yes, I‘m verifying the new pinmux implementation based on pinmux-select.

jan-kiszka commented 1 year ago

@benbrenson

benbrenson commented 1 year ago

Same question here: regression of d8af4f9?

I would say that this is more device tree specific, hence f9a9cef is the commit in question. Thanks for debugging!

siemens / meta-iot2050

Arduino SPI pinmux error #462