Copying from https://elinux.org/BeagleBone_Black_Enable_SPIDEV I came up
with
------------------------------
/dts-v1/;
/plugin/;
/* SPI1 */
/* D1 Output and D0 Input */
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black", "beaglebone-green";
/* identification */
part-number = "spi1mux";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
spi1_pins_s0: spi1_pins_s0 {
pinctrl-single,pins = <
0x190 0x33 /* mcasp0_aclkx.spi1_sclk,
INPUT_PULLUP | MODE3 */
0x194 0x33 /* mcasp0_fsx.spi1_d0,
INPUT_PULLUP | MODE3 */
0x198 0x13 /* mcasp0_axr0.spi1_d1,
OUTPUT_PULLUP | MODE3 */
0x6c 0x17 /* gpmc_a11.gpio1_27,
OUTPUT_PULLUP | MODE7 */
>;
};
};
};
fragment@1 {
target = <&spi1>;
__overlay__ {
#address-cells = < 0x01 >;
#size-cells = < 0x00 >;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins_s0>;
spidev@1 {
spi-max-frequency = < 0xf42400 >;
reg = < 0x00 >;
compatible = "linux,spidev";
};
};
};
};
------------------------------
and compiled to dtbo, add to uEnv.txt rebooted but still no reflection when
test the SPI, hmmm? don't know if this is been overwritten or just not
working?
what the best way to track down what pin are been connected to the SPI bus,
I'm thinking I should be able to find what pin are controlling the SCLK,
MOSI and MISO.
Regards,
On Thursday, January 28, 2021 at 6:44:35 AM UTC+10 Yendor wrote:
> How to setup pins as SPI?
>
> Support has let me know what pins are controlling the SPI bus for the LoRa
> connector and now I need to know how to set them up so they work as SPI0.0
>
> the known pins:
> MCASP0_ACLKX gpio3_14 110 SPI1_SCLK
> MCASP0_FSX gpio3_15 111 SPI1_DO
> MCASP0_AXR0 gpio3_16 112 SPI1_D1
> GPMC_A11 gpio1_27 59 LoRa_CS1
>
> after getting this working I would like to write a dts that enables the
> ethernet, set the spi correctly and enables LoRa (set gpio0_22 as a output
> and set high), what are the best resources for doing this?
>
> Regards,
>
> On Monday, January 25, 2021 at 5:35:38 AM UTC+10 Yendor wrote:
>
>> Thanks for the links Jon,
>>
>> I see in /dev/spi:
>> lrwxrwxrwx 1 root root 12 Jan 24 06:30 0.0 -> ../spidev0.0
>> lrwxrwxrwx 1 root root 12 Jan 24 06:30 0.1 -> ../spidev0.1
>> lrwxrwxrwx 1 root root 12 Jan 24 06:30 1.0 -> ../spidev1.0
>> lrwxrwxrwx 1 root root 12 Jan 24 06:30 1.1 -> ../spidev1.1
>>
>> config-pin give a error
>> ERROR: open() for /sys/devices/platform/ocp/ocp:P9_17_pinmux/state
>> failed, No such file or directory
>>
>> and for spi_test on /dev/spidev0.0 to 1.1 with shorting the mosi and miso
>> pins, I get:
>> sudo ./spi_test --device /dev/spidev0.0
>> spi mode: 0
>> bits per word: 8
>> max speed: 500000 Hz (500 KHz)
>>
>> 00 00 00 00 00 00
>> 00 00 00 00 00 00
>> 00 00 00 00 00 00
>> 00 00 00 00 00 00
>> 00 00 00 00 00 00
>> 00 00 00 00 00 00
>> 00 00
>>
>> On Sunday, January 24, 2021 at 4:44:57 PM UTC+10 [email protected] wrote:
>>
>>> A quick test is to see if a SPI device has been created under '/dev/'.
>>>
>>> A few SPI test references:
>>>
>>> https://github.com/derekmolloy/exploringBB/tree/version2/chp08/spi/spidev_test
>>> https://elinux.org/BeagleBone_Black_Enable_SPIDEV
>>> https://gist.github.com/pdp7/33a8ad95efcbcc0fadc3f96a70d4b159
>>>
>>>
>>> Cheers,
>>>
>>> Jon
>>>
>>> On Sat, Jan 23, 2021 at 9:15 PM Yendor <[email protected]> wrote:
>>>
>>>> How can I tell if the SPI interface is enabled?
>>>>
>>>> On Wednesday, January 20, 2021 at 7:24:32 AM UTC+10 Yendor wrote:
>>>>
>>>>> Hi,
>>>>> Carrying on from the SeeedStudio SenseCAP Gateway hacking form this
>>>>> conversation (https://groups.google.com/g/beagleboard/c/Y_Zx_D2HJUA)
>>>>>
>>>>> I am now looking to get the LoRa interface working, the interface is a
>>>>> mPCIe SPI RAK2247
>>>>> <https://docs.rakwireless.com/Product-Categories/WisLink/RAK2247/Overview/>
>>>>>
>>>>> LoRa card connector.
>>>>>
>>>>> The things I think I need to find out how to do:
>>>>>
>>>>> - Identify the correct SPI bus for the connector;
>>>>> - and what GPIO drives the reset pin (PIN 22) of the connector.
>>>>>
>>>>> if anyone has any ideas on the best why to do this, please feel free
>>>>> to share.
>>>>>
>>>>> Regards,
>>>>>
>>>>> result of gpioinfo:
>>>>> gpiochip0 - 32 lines:
>>>>> line 0: "MDIO_DATA" unused input active-high
>>>>> line 1: "MDIO_CLK" unused input active-high
>>>>> line 2: "SPI0_SCLK" "P9_22" input active-high [used]
>>>>> line 3: "SPI0_D0" "P9_21" input active-high [used]
>>>>> line 4: "SPI0_D1" "P9_18" input active-high [used]
>>>>> line 5: "SPI0_CS0" "P9_17" input active-high [used]
>>>>> line 6: "SPI0_CS1" "cd" input active-low [used]
>>>>> line 7: "ECAP0_IN_PWM0_OUT" "P9_42" input active-high [used]
>>>>> line 8: "LCD_DATA12" "P8_35" input active-high [used]
>>>>> line 9: "LCD_DATA13" "P8_33" input active-high [used]
>>>>> line 10: "LCD_DATA14" "P8_31" input active-high [used]
>>>>> line 11: "LCD_DATA15" "P8_32" input active-high [used]
>>>>> line 12: "UART1_CTSN" "P9_20" input active-high [used]
>>>>> line 13: "UART1_RTSN" "P9_19" input active-high [used]
>>>>> line 14: "UART1_RXD" "P9_26" input active-high [used]
>>>>> line 15: "UART1_TXD" "P9_24" input active-high [used]
>>>>> line 16: "GMII1_TXD3" unused input active-high
>>>>> line 17: "GMII1_TXD2" unused input active-high
>>>>> line 18: "USB0_DRVVBUS" unused input active-high
>>>>> line 19: "XDMA_EVENT_INTR0" "A15" input active-high [used]
>>>>> line 20: "XDMA_EVENT_INTR1" "P9_41" input active-high [used]
>>>>> line 21: "GMII1_TXD1" unused input active-high
>>>>> line 22: "GPMC_AD8" "P8_19" input active-high [used]
>>>>> line 23: "GPMC_AD9" "P8_13" input active-high [used]
>>>>> line 24: "NC" unused input active-high
>>>>> line 25: "NC" unused input active-high
>>>>> line 26: "GPMC_AD10" unused input active-high
>>>>> line 27: "GPMC_AD11" unused input active-high
>>>>> line 28: "GMII1_TXD0" unused input active-high
>>>>> line 29: "RMII1_REFCLK" unused input active-high
>>>>> line 30: "GPMC_WAIT0" "P9_11" input active-high [used]
>>>>> line 31: "GPMC_WPN" "P9_13" input active-high [used]
>>>>> gpiochip1 - 32 lines:
>>>>> line 0: "GPMC_AD0" "P8_25" input active-high [used]
>>>>> line 1: "GPMC_AD1" "P8_24" input active-high [used]
>>>>> line 2: "GPMC_AD2" "P8_05" input active-high [used]
>>>>> line 3: "GPMC_AD3" "P8_06" input active-high [used]
>>>>> line 4: "GPMC_AD4" "P8_23" input active-high [used]
>>>>> line 5: "GPMC_AD5" "P8_22" input active-high [used]
>>>>> line 6: "GPMC_AD6" "P8_03" input active-high [used]
>>>>> line 7: "GPMC_AD7" "P8_04" input active-high [used]
>>>>> line 8: "UART0_CTSN" unused input active-high
>>>>> line 9: "UART0_RTSN" unused input active-high
>>>>> line 10: "UART0_RXD" unused input active-high
>>>>> line 11: "UART0_TXD" unused input active-high
>>>>> line 12: "GPMC_AD12" "P8_12" input active-high [used]
>>>>> line 13: "GPMC_AD13" "P8_11" input active-high [used]
>>>>> line 14: "GPMC_AD14" "P8_16" input active-high [used]
>>>>> line 15: "GPMC_AD15" "P8_15" input active-high [used]
>>>>> line 16: "GPMC_A0" "P9_15" input active-high [used]
>>>>> line 17: "GPMC_A1" "P9_23" input active-high [used]
>>>>> line 18: "GPMC_A2" "P9_14" input active-high [used]
>>>>> line 19: "GPMC_A3" "P9_16" input active-high [used]
>>>>> line 20: "GPMC_A4" unused input active-high
>>>>> line 21: "GPMC_A5" "beaglebone:green:usr0" output
>>>>> active-high [used]
>>>>> line 22: "GPMC_A6" "beaglebone:green:usr1" output
>>>>> active-high [used]
>>>>> line 23: "GPMC_A7" "beaglebone:green:usr2" output
>>>>> active-high [used]
>>>>> line 24: "GPMC_A8" "beaglebone:green:usr3" output
>>>>> active-high [used]
>>>>> line 25: "GPMC_A9" unused input active-high
>>>>> line 26: "GPMC_A10" unused input active-high
>>>>> line 27: "GPMC_A11" unused input active-high
>>>>> line 28: "GPMC_BE1N" "P9_12" input active-high [used]
>>>>> line 29: "GPMC_CSN0" "LS_BUF_EN" output active-high [used]
>>>>> line 30: "GPMC_CSN1" "P8_21" input active-high [used]
>>>>> line 31: "GPMC_CSN2" "P8_20" input active-high [used]
>>>>> gpiochip2 - 32 lines:
>>>>> line 0: "GPMC_CSN3" unused input active-high
>>>>> line 1: "GPMC_CLK" "P8_18" input active-high [used]
>>>>> line 2: "GPMC_ADVN_ALE" "P8_07" input active-high [used]
>>>>> line 3: "GPMC_OEN_REN" "P8_08" input active-high [used]
>>>>> line 4: "GPMC_WEN" "P8_10" input active-high [used]
>>>>> line 5: "GPMC_BE0N_CLE" "P8_09" input active-high [used]
>>>>> line 6: "LCD_DATA0" "P8_45" input active-high [used]
>>>>> line 7: "LCD_DATA1" "P8_46" input active-high [used]
>>>>> line 8: "LCD_DATA2" "P8_43" input active-high [used]
>>>>> line 9: "LCD_DATA3" "P8_44" input active-high [used]
>>>>> line 10: "LCD_DATA4" "P8_41" input active-high [used]
>>>>> line 11: "LCD_DATA5" "P8_42" input active-high [used]
>>>>> line 12: "LCD_DATA6" "P8_39" input active-high [used]
>>>>> line 13: "LCD_DATA7" "P8_40" input active-high [used]
>>>>> line 14: "LCD_DATA8" "P8_37" input active-high [used]
>>>>> line 15: "LCD_DATA9" "P8_38" input active-high [used]
>>>>> line 16: "LCD_DATA10" "P8_36" input active-high [used]
>>>>> line 17: "LCD_DATA11" "P8_34" input active-high [used]
>>>>> line 18: "GMII1_RXD3" unused input active-high
>>>>> line 19: "GMII1_RXD2" unused input active-high
>>>>> line 20: "GMII1_RXD1" unused input active-high
>>>>> line 21: "GMII1_RXD0" unused input active-high
>>>>> line 22: "LCD_VSYNC" "P8_27" input active-high [used]
>>>>> line 23: "LCD_HSYNC" "P8_29" input active-high [used]
>>>>> line 24: "LCD_PCLK" "P8_28" input active-high [used]
>>>>> line 25: "LCD_AC_BIAS_EN" "P8_30" input active-high [used]
>>>>> line 26: "MMC0_DAT3" unused input active-high
>>>>> line 27: "MMC0_DAT2" unused input active-high
>>>>> line 28: "MMC0_DAT1" unused input active-high
>>>>> line 29: "MMC0_DAT0" unused input active-high
>>>>> line 30: "MMC0_CLK" unused input active-high
>>>>> line 31: "MMC0_CMD" unused input active-high
>>>>> gpiochip3 - 32 lines:
>>>>> line 0: "GMII1_COL" unused input active-high
>>>>> line 1: "GMII1_CRS" unused input active-high
>>>>> line 2: "GMII1_RXER" unused input active-high
>>>>> line 3: "GMII1_TXEN" unused input active-high
>>>>> line 4: "GMII1_RXDV" unused input active-high
>>>>> line 5: "I2C0_SDA" unused input active-high
>>>>> line 6: "I2C0_SCL" unused input active-high
>>>>> line 7: "EMU0" unused input active-high
>>>>> line 8: "EMU1" unused input active-high
>>>>> line 9: "GMII1_TXCLK" unused input active-high
>>>>> line 10: "GMII1_RXCLK" unused input active-high
>>>>> line 11: "NC" unused input active-high
>>>>> line 12: "NC" unused input active-high
>>>>> line 13: "USB1_DRVVBUS" unused input active-high
>>>>> line 14: "MCASP0_ACLKX" "P9_31" input active-high [used]
>>>>> line 15: "MCASP0_FSX" "P9_29" input active-high [used]
>>>>> line 16: "MCASP0_AXR0" "MCASP0_AHCLKR" output active-high
>>>>> [used]
>>>>> line 17: "MCASP0_AHCLKR" "P9_28" input active-high [used]
>>>>> line 18: "MCASP0_ACLKR" "P9_92" input active-high [used]
>>>>> line 19: "MCASP0_FSR" "P9_27" input active-high [used]
>>>>> line 20: "MCASP0_AXR1" "P9_91" input active-high [used]
>>>>> line 21: "MCASP0_AHCLKX" "P9_25" input active-high [used]
>>>>> line 22: "NC" unused input active-high
>>>>> line 23: "NC" unused input active-high
>>>>> line 24: "NC" unused input active-high
>>>>> line 25: "NC" unused input active-high
>>>>> line 26: "NC" unused input active-high
>>>>> line 27: "NC" unused input active-high
>>>>> line 28: "NC" unused input active-high
>>>>> line 29: "NC" unused input active-high
>>>>> line 30: "NC" unused input active-high
>>>>> line 31: "NC" unused input active-high
>>>>>
>>>> --
>>>> For more options, visit http://beagleboard.org/discuss
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>>>>
>>>> <https://groups.google.com/d/msgid/beagleboard/02816dce-8292-4276-b8d3-fcea1ba17d8fn%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>
--
For more options, visit http://beagleboard.org/discuss
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