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标题:
AM437X移植ads7846有中断,没事件,急急急在线等
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作者:
xjtxzg
时间:
2019-5-24 10:11
标题:
AM437X移植ads7846有中断,没事件,急急急在线等
root@am437x-evm:/dev/input# cat /proc/interrupts
.....
97: 1107 48322000.gpio 7 Edge ads7846
root@am437x-evm:/dev/input# cat /proc/bus/input/devices
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="ADS7846 Touchscreen"
P: Phys=spi1.0/input0
S: Sysfs=/devices/platform/44000000.ocp/481a2000.spi/spi_master/spi1/spi1.0/input/input0
U: Uniq=
H: Handlers=event0
B: PROP=0
B: EV=b
B: KEY=400 0 0 0 0 0 0 0 0 0 0
B: ABS=1000003
root@am437x-evm:/dev/input# cat event0
触摸屏幕,没有任何打印。。。。。。。。。。。。。。。。。。
作者:
梁淑怡-Tronlong
时间:
2019-5-24 11:37
您好,
1.请确认设备树文件已配置好Pinmux和节点。2.确认设备树文件已替换成功。
3.查看在文件系统/dev/input/目录下有没有产生eventX的节点。
再执行od -x /dev/input/eventX ,然后触摸LCD看是否有打印东西。有打印信息就表示配置正常。
作者:
xjtxzg
时间:
2019-5-24 13:48
梁工您好
dts文件相关部分:
ads7846reg: ads7846-reg { /* 4 line touch screen driver */
compatible = "regulator-fixed";
regulator-name = "ads7846-reg";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
#if 0
pixcir_ts_pins: pixcir_ts_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0xa64, PIN_INPUT_PULLUP | MUX_MODE7) /* spi2_d0.gpio3_22 */
>;
};
#endif
spi2_pins: spi2_pins { /*4 wire touch screen driver chip */
pinctrl-single,pins = <
AM4372_IOPAD(0xa60, INPUT_EN | MUX_MODE0) /* mcspi2_sclk mode 0*/
AM4372_IOPAD(0xa64, INPUT_EN | MUX_MODE0) /* 268 mcspi2_d0 mode 0*/
AM4372_IOPAD(0xa68, INPUT_EN | MUX_MODE0) /* 264 mcspi2_d1 mode 0*/
AM4372_IOPAD(0xa6c, PIN_OUTPUT_PULLUP | MUX_MODE0) /* mcspi2_cs0 mode 0*/
>;
};
ads7846_pins: ads7846_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0xa5c, PIN_INPUT_PULLUP | MUX_MODE7) /* spi4_cs0..gpio5_7 */
>;
};
&spi2 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins>;
ads7846@0 {
pinctrl-names = "default";
pinctrl-0 = <&ads7846_pins>;
compatible = "ti,ads7846";
vcc-supply = <&ads7846reg>;
reg = <0>; /* CS0 */
spi-max-frequency = <1500000>;
interrupt-parent = <&gpio5>;
interrupts = <7 0>; /* gpio5_7 */
pendown-gpio = <&gpio5 7 0>;
ti,x-min = /bits/ 16 <0x0>;
ti,x-max = /bits/ 16 <0x0fff>;
ti,y-min = /bits/ 16 <0x0>;
ti,y-max = /bits/ 16 <0x0fff>;
ti,x-plate-ohms = /bits/ 16 <180>;
ti,pressure-max = /bits/ 16 <255>;
ti,debounce-max = /bits/ 16 <10>;
ti,debounce-tol = /bits/ 16 <30>;
ti,debounce-rep = /bits/ 16 <1>;
ti,settle-delay-usec = /bits/ 16 <150>;
ti,keep-vref-on = <1>;
linux,wakeup;
};
};
作者:
xjtxzg
时间:
2019-5-28 14:16
梁淑怡-Tronlong 发表于 2019-5-24 11:37
您好,
1.请确认设备树文件已配置好Pinmux和节点。2.确认设备树文件已替换成功。
3.查看在文件系统/dev ...
梁工您好
dts文件相关部分:
ads7846reg: ads7846-reg { /* 4 line touch screen driver */
compatible = "regulator-fixed";
regulator-name = "ads7846-reg";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
#if 0
pixcir_ts_pins: pixcir_ts_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0xa64, PIN_INPUT_PULLUP | MUX_MODE7) /* spi2_d0.gpio3_22 */
>;
};
#endif
spi2_pins: spi2_pins { /*4 wire touch screen driver chip */
pinctrl-single,pins = <
AM4372_IOPAD(0xa60, INPUT_EN | MUX_MODE0) /* mcspi2_sclk mode 0*/
AM4372_IOPAD(0xa64, INPUT_EN | MUX_MODE0) /* 268 mcspi2_d0 mode 0*/
AM4372_IOPAD(0xa68, INPUT_EN | MUX_MODE0) /* 264 mcspi2_d1 mode 0*/
AM4372_IOPAD(0xa6c, PIN_OUTPUT_PULLUP | MUX_MODE0) /* mcspi2_cs0 mode 0*/
>;
};
ads7846_pins: ads7846_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0xa5c, PIN_INPUT_PULLUP | MUX_MODE7) /* spi4_cs0..gpio5_7 */
>;
};
&spi2 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins>;
ads7846@0 {
pinctrl-names = "default";
pinctrl-0 = <&ads7846_pins>;
compatible = "ti,ads7846";
vcc-supply = <&ads7846reg>;
reg = <0>; /* CS0 */
spi-max-frequency = <1500000>;
interrupt-parent = <&gpio5>;
interrupts = <7 0>; /* gpio5_7 */
pendown-gpio = <&gpio5 7 0>;
ti,x-min = /bits/ 16 <0x0>;
ti,x-max = /bits/ 16 <0x0fff>;
ti,y-min = /bits/ 16 <0x0>;
ti,y-max = /bits/ 16 <0x0fff>;
ti,x-plate-ohms = /bits/ 16 <180>;
ti,pressure-max = /bits/ 16 <255>;
ti,debounce-max = /bits/ 16 <10>;
ti,debounce-tol = /bits/ 16 <30>;
ti,debounce-rep = /bits/ 16 <1>;
ti,settle-delay-usec = /bits/ 16 <150>;
ti,keep-vref-on = <1>;
linux,wakeup;
};
};
作者:
czs----Tronlong
时间:
2019-6-4 21:38
Dear ,
根据您的实际调试情况,需要修改设备树配置
ti,x-plate-ohms = / bits / 16 <180>;
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