V3s/S3 Linux 测试轮询/中断 GPIO 按钮驱动程序 / 旋转编码器等

晕哥 · 2019-04-26 23:50:07

GPIO KEY 按键驱动(轮询)测试:

参考: https://github.com/ARM-software/u-boot/blob/master/arch/arm/dts/sun4i-a10-inet9f-rev03.dts

1. Linux驱动配置 gpio keys poll 驱动:

CONFIG_KEYBOARD_GPIO_POLLED=y

2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:

key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
bias-pull-up;
};

3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:

#include <dt-bindings/input/input.h>

       gpio_keys {
               compatible = "gpio-keys-polled";
               pinctrl-names = "default";
               pinctrl-0 = <&key_pins>;
               #address-cells = <1>;
               #size-cells = <0>;
               poll-interval = <20>;

               button@0 {
                       label = "Left Joystick Left";
                       linux,code = <ABS_X>;
                       linux,input-type = <EV_ABS>;
                       linux,input-value = <0xffffffff>; /* -1 */
                       gpios = <&pio 1 0 GPIO_ACTIVE_LOW>; /* PB0 */
               };

               button@1 {
                       label = "Left Joystick Right";
                       linux,code = <ABS_Z>;
                       linux,input-type = <EV_ABS>;
                       linux,input-value = <1>;
                       gpios = <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB1 */
               };
       };

4. 编译烧录运行测试:

# evtest /dev/input/event0
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio_keys"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min       -1
      Max        0
    Event code 2 (ABS_Z)
      Value      0
      Min        0
      Max        1
Properties:
Testing ... (interrupt to exit)
Event: time 80.855039, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 80.855039, -------------- SYN_REPORT ------------
Event: time 80.915049, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 80.915049, -------------- SYN_REPORT ------------
Event: time 84.545066, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 84.545066, -------------- SYN_REPORT ------------
Event: time 84.605043, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 84.605043, -------------- SYN_REPORT ------------
Event: time 90.845038, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 90.845038, -------------- SYN_REPORT ------------
Event: time 90.995036, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 90.995036, -------------- SYN_REPORT ------------
Event: time 91.145036, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 91.145036, -------------- SYN_REPORT ------------
Event: time 91.355035, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 91.355035, -------------- SYN_REPORT ------------
Event: time 91.445037, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 91.445037, -------------- SYN_REPORT ------------
Event: time 91.625037, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 91.625037, -------------- SYN_REPORT ------------
Event: time 101.375037, type 3 (EV_ABS), code 0 (ABS_X), value -1
Event: time 101.375037, -------------- SYN_REPORT ------------

晕哥 · 2019-04-27 09:23:07

--------------------------------------------------------------------------------

晕哥 · 2019-04-27 09:28:27

GPIO KEY 按键驱动(中断)测试:

参考: https://gitlab.labs.nic.cz/turris/u-boot-turris/commit/643ad899f545fd101aa7a67771e74d582a1829b2

1. Linux驱动配置 gpio keys 驱动:

CONFIG_KEYBOARD_GPIO=y

2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:

key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};

3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:

#include <dt-bindings/input/input.h>

gpio_keys {
        compatible = "gpio-keys";
        pinctrl-names = "default";
        pinctrl-0 = <&key_pins>;
        #address-cells = <1>;
        #size-cells = <0>;
        autorepeat;
        button@0 {
                label = "Key back";
                linux,code = <KEY_BACK>;
                gpios = <&pio 1 0 GPIO_ACTIVE_LOW>; /* PB0 */
        };


         button@1 {
                 label = "Key home";
                 linux,code = <KEY_HOME>;
                 gpios = <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB1 */
         };

};

4. 编译烧录运行测试, 支持长按:

# evtest /dev/input/event2
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio_keys"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 102 (KEY_HOME)
    Event code 158 (KEY_BACK)
Key repeat handling:
  Repeat type 20 (EV_REP)
    Repeat code 0 (REP_DELAY)
      Value    250
    Repeat code 1 (REP_PERIOD)
      Value     33
Properties:
Testing ... (interrupt to exit)
Event: time 3606.960158, type 1 (EV_KEY), code 102 (KEY_HOME), value 1
Event: time 3606.960158, -------------- SYN_REPORT ------------
Event: time 3607.220140, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.220140, -------------- SYN_REPORT ------------
Event: time 3607.270142, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.270142, -------------- SYN_REPORT ------------
Event: time 3607.320136, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.320136, -------------- SYN_REPORT ------------
Event: time 3607.370136, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.370136, -------------- SYN_REPORT ------------
Event: time 3607.370277, type 1 (EV_KEY), code 102 (KEY_HOME), value 0
Event: time 3607.370277, -------------- SYN_REPORT ------------
Event: time 3616.220150, type 1 (EV_KEY), code 158 (KEY_BACK), value 1
Event: time 3616.220150, -------------- SYN_REPORT ------------
Event: time 3616.480130, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.480130, -------------- SYN_REPORT ------------
Event: time 3616.530130, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.530130, -------------- SYN_REPORT ------------
Event: time 3616.580139, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.580139, -------------- SYN_REPORT ------------
Event: time 3616.630136, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.630136, -------------- SYN_REPORT ------------
Event: time 3616.680132, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.680132, -------------- SYN_REPORT ------------
Event: time 3616.730131, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.730131, -------------- SYN_REPORT ------------
Event: time 3616.780134, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.780134, -------------- SYN_REPORT ------------
Event: time 3616.830131, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.830131, -------------- SYN_REPORT ------------
Event: time 3616.850155, type 1 (EV_KEY), code 158 (KEY_BACK), value 0
Event: time 3616.850155, -------------- SYN_REPORT ------------

晕哥 · 2019-04-27 09:55:11

参考: https://www.kernel.org/doc/Documentation/devicetree/bindings/input/gpio-keys.txt

接上帖， GPIO 也可以换作 interrupts, Linux 官方文档提示 二选一

gpio_keys {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
autorepeat;
button@0 {
label = "Key back";
linux,code = <KEY_BACK>;

interrupt-parent = <&pio>;
interrupts = <1 0 IRQ_TYPE_EDGE_FALLING>;//PB0

};

button@1 {
label = "Key home";
linux,code = <KEY_HOME>;

interrupt-parent = <&pio>;
interrupts = <1 1 IRQ_TYPE_EDGE_FALLING>; //PB1
};
};

查看中断:

# cat /proc/interrupts
CPU0
17: 0 GIC-0 29 Level arch_timer
18: 3375 GIC-0 30 Level arch_timer
21: 0 GIC-0 50 Level /soc/timer@01c20c00
22: 0 GIC-0 82 Level 1c02000.dma-controller
23: 9025 GIC-0 92 Level sunxi-mmc
24: 479 GIC-0 93 Level sunxi-mmc
25: 21 GIC-0 103 Level musb-hdrc.1.auto
26: 0 GIC-0 104 Level ehci_hcd:usb1
27: 0 GIC-0 105 Level ohci_hcd:usb2
28: 0 GIC-0 72 Level 1c20400.rtc
34: 0 GIC-0 62 Level sun4i-a10-lradc-keys
36: 226 GIC-0 32 Level ttyS0
37: 0 GIC-0 38 Level mv64xxx_i2c
39: 1 sunxi_pio_edge 0 Edge Key back
40: 68 sunxi_pio_edge 1 Edge Key home
IPI0: 0 CPU wakeup interrupts
IPI1: 0 Timer broadcast interrupts
IPI2: 0 Rescheduling interrupts
IPI3: 0 Function call interrupts
IPI4: 0 CPU stop interrupts
IPI5: 0 IRQ work interrupts
IPI6: 0 completion interrupts

晕哥 · 2019-04-27 14:07:17

旋转编码器(中断)测试:

参考: https://github.com/teknoid/dac/blob/master/misc/gpio-rotary.dts

接线方法:

PB0 - CLK
PB1 - DT
3V3
GND

1. Linux驱动配置 gpio keys 驱动:

CONFIG_INPUT_GPIO_ROTARY_ENCODER=y

2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:

key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};

3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:

#include <dt-bindings/input/input.h>

rotary@0 {
        compatible = "rotary-encoder";

        pinctrl-names = "default";
        pinctrl-0 = <&key_pins>;

        gpios = <&pio 1 0 GPIO_ACTIVE_LOW>, <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB0, PB1 */
        linux,axis = <0>; /* REL_X */
        rotary-encoder,encoding = "gray";
        rotary-encoder,relative-axis;
};

4. 编译烧录运行测试, 支持长按:

# evtest /dev/input/event1
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "rotary@0"
Supported events:
Event type 0 (EV_SYN)
Event type 2 (EV_REL)
Event code 0 (REL_X)
Properties:
Testing ... (interrupt to exit)
Event: time 2474.959560, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2474.959560, -------------- SYN_REPORT ------------
Event: time 2476.204760, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2476.204760, -------------- SYN_REPORT ------------
Event: time 2476.907228, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2476.907228, -------------- SYN_REPORT ------------
Event: time 2477.565278, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2477.565278, -------------- SYN_REPORT ------------
Event: time 2478.140605, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2478.140605, -------------- SYN_REPORT ------------
Event: time 2478.548095, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2478.548095, -------------- SYN_REPORT ------------
Event: time 2479.051748, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.051748, -------------- SYN_REPORT ------------
Event: time 2479.541767, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.541767, -------------- SYN_REPORT ------------
Event: time 2479.924168, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.924168, -------------- SYN_REPORT ------------
Event: time 2480.279108, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2480.279108, -------------- SYN_REPORT ------------

晕哥 · 2019-04-27 19:57:18

荔枝派zero 旋转编码器演示视频

WhyCan Forum(哇酷开发者社区)

楼主 #1 2019-04-26 23:50:07 分享评论