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Difference between revisions of "BeagleBone Black Enable SPIDEV"

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(SPI0)
(For SPI1)
Line 17: Line 17:
  
 
     /* identification */
 
     /* identification */
     part-number = "BB-SPI1-01";
+
     part-number = "spi1mux";
 
+
    /* version */
+
    version = "00A0";
+
 
+
    /* state the resources this cape uses */
+
    exclusive-use =
+
        /* the pin header uses */
+
        "P9.31",
+
        "P9.29",
+
        "P9.30",
+
        "P9.28",
+
        "P9.13",
+
        "P9.12",
+
        "spi1";
+
  
 
     fragment@0 {
 
     fragment@0 {
 
         target = <&am33xx_pinmux>;
 
         target = <&am33xx_pinmux>;
 
         __overlay__ {
 
         __overlay__ {
             pinctrl_spi1: pinctrl_spi1_pins {
+
             spi1_pins_s0: spi1_pins_s0 {
                pinctrl-single,pins = <                                      
+
                        pinctrl-single,pins = <
                    0x190 0x13    /* P9_31 = mcasp0_aclkx.spi1_sclk                 , OUTPUT_PULLUP | MODE3 */
+
                                0x190 0x33      /* mcasp0_aclkx.spi1_sclk, INPUT_PULLUP | MODE3 */
                    0x194 0x33   /* P9_29 = mcasp0_fsx.spi1_d0                     , INPUT_PULLUP | MODE3 */
+
                                0x194 0x33     /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
                    0x198 0x13   /* P9_30 = mcasp0_axr0.spi1_d1                     , OUTPUT_PULLUP | MODE3 */
+
                                0x198 0x13     /* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
                    0x19c 0x13   /* P9_28 = mcasp0_ahclkr.spi1_cs0                 , OUTPUT_PULLUP | MODE3 */                   
+
                                0x19c 0x13     /* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
                    0x164 0x12  /* P9_42 = GPIO0_7 =  eCAP0_in_PWM0_out.gpio0[7] , OUTPUT_PULLUP | MODE2 */
+
 
                 >;
 
                 >;
 
             };
 
             };
Line 51: Line 36:
 
         target = <&spi1>;
 
         target = <&spi1>;
 
         __overlay__ {
 
         __overlay__ {
            #address-cells    = <1>;
 
            #size-cells    = <0>;
 
            status            = "okay";
 
            pinctrl-names    = "default";
 
            pinctrl-0        = <&pinctrl_spi1>;   
 
            cs-gpios        = <&gpio4 17 0>, <&gpio1 7 0>;
 
  
            spi1_0{
+
            #address-cells = <1>;
                #address-cells       = <1>;
+
            #size-cells = <0>;
                #size-cells       = <0>;
+
            status = "okay";
                compatible          = "spidev";
+
            pinctrl-names = "default";
                reg              = <0>;
+
            pinctrl-0 = <&spi1_pins_s0>;
                spi-max-frequency = <16000000>;
+
 
                spi-cpha;         
+
            spidev@1 {
            };
+
                spi-max-frequency = <24000000>;
            spi1_1{
+
                reg = <1>;
                #address-cells      = <1>;
+
                compatible = "linux,spidev";
                #size-cells      = <0>;
+
                compatible           = "spidev";
+
                reg              = <1>;
+
                spi-max-frequency = <16000000>;
+
                // Mode 0 (CPOL = 0, CPHA = 0)
+
 
             };
 
             };
 
         };
 
         };
Line 91: Line 65:
 
</pre>
 
</pre>
  
 +
Plug in your BBB to a host computer using the mini usb data cable.
 +
 +
Go to My Computer>BeagleBone Getting Started> and open uEnv.txt
 +
Copy and paste this command into the .txt file. Make sure to save your changes.
 +
(Ctrl+s)
 +
 +
<pre>
 +
optargs=quiet drm.debug=7 capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
 +
capemgr.enable_partno=BB-SPI1-01
 +
</pre>
 +
after you save the changes, reboot your beaglebone black
 +
<br>
 
Make sure it is enabled
 
Make sure it is enabled
 
You should now have two spidev-files in the folder /dev/
 
You should now have two spidev-files in the folder /dev/

Revision as of 02:45, 16 July 2013

For SPI1

Start nano

nano BB-SPI1-01-00A0.dts


Copy-paste this into the file:

/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    /* 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 */
                                0x19c 0x13      /* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
                >;
            };
        };
    };

    fragment@1 {
        target = <&spi1>;
        __overlay__ {

             #address-cells = <1>;
             #size-cells = <0>;
             status = "okay";
             pinctrl-names = "default";
             pinctrl-0 = <&spi1_pins_s0>;

             spidev@1 {
                 spi-max-frequency = <24000000>;
                 reg = <1>;
                 compatible = "linux,spidev";
            };
        };
    };
};

Close the file (Ctrl-o, Ctrl-x) and compile using dtc:

dtc -O dtb -o BB-SPI1-01-00A0.dtbo -b 0 -@ BB-SPI1-01-00A0.dts

Then, copy the file into /lib/firmware/:

 cp BB-SPI1-01-00A0.dtbo /lib/firmware/

Then enable the device tree overlay:

 echo BB-SPI1-01 > /sys/devices/bone_capemgr.*/slots

Plug in your BBB to a host computer using the mini usb data cable.

Go to My Computer>BeagleBone Getting Started> and open uEnv.txt Copy and paste this command into the .txt file. Make sure to save your changes. (Ctrl+s)

optargs=quiet drm.debug=7 capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
capemgr.enable_partno=BB-SPI1-01

after you save the changes, reboot your beaglebone black
Make sure it is enabled You should now have two spidev-files in the folder /dev/

ls -al /dev/spidev1.*

You should also be able to see the pingroups:

cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups

SPI0

Start nano

nano BB-SPI0-01-00A0.dts


Copy-paste this into the file:

/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    /* identification */
    part-number = "spi0pinmux";

    fragment@0 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            spi0_pins_s0: spi0_pins_s0 {
                pinctrl-single,pins = <
                  0x150 0x30  /* spi0_sclk, INPUT_PULLUP | MODE0 */
                  0x154 0x30  /* spi0_d0, INPUT_PULLUP | MODE0 */
                  0x158 0x10  /* spi0_d1, OUTPUT_PULLUP | MODE0 */
                  0x15c 0x10  /* spi0_cs0, OUTPUT_PULLUP | MODE0 */
                >;
            };
        };
    };

    fragment@1 {
        target = <&spi0>;
        __overlay__ {
             #address-cells = <1>;
             #size-cells = <0>;

             status = "okay";
             pinctrl-names = "default";
             pinctrl-0 = <&spi0_pins_s0>;

             spidev@0 {
                 spi-max-frequency = <24000000>;
                 reg = <0>;
                 compatible = "linux,spidev";
            };
        };
    };
};

Close the file (Ctrl-o, Ctrl-x) and compile using dtc:

dtc -O dtb -o BB-SPI0-01-00A0.dtbo -b 0 -@ BB-SPI0-01-00A0.dts

Then, copy the file into /lib/firmware/:

 cp BB-SPI0-01-00A0.dtbo /lib/firmware/

Then enable the device tree overlay:

 echo BB-SPI0-01 > /sys/devices/bone_capemgr.*/slots

Make sure it is enabled You should now have two spidev-files in the folder /dev/

ls -al /dev/spidev0.*

You should also be able to see the pingroups:

cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups