一、gps配置
1.查看主板原理圖,查找GPS的使能引腳
2.根據GPIO_GPS_LNA_EN去查找對應的GPIO引腳
3.修改dws
4.修改dts
/* CONSYS GPIO standardization */
&pio {
consys_pins_default: consys_default {
};
gpslna_pins_init: gpslna@0 {
pins_cmd_dat {
pins = <PINMUX_GPIO118__FUNC_GPIO118>;
slew-rate = <0>;
bias-disable;
output-low;
};
};
gpslna_pins_oh: gpslna@1 {
pins_cmd_dat {
pins = <PINMUX_GPIO118__FUNC_GPIO118>;
slew-rate = <1>;
output-high;
};
};
gpslna_pins_ol: gpslna@2 {
pins_cmd_dat {
pins = <PINMUX_GPIO118__FUNC_GPIO118>;
slew-rate = <1>;
output-low;
};
};
};
&consys {
pinctrl-names = "default", "gps_lna_state_init", "gps_lna_state_oh", "gps_lna_state_ol";
pinctrl-0 = <&consys_pins_default>;
pinctrl-1 = <&gpslna_pins_init>;
pinctrl-2 = <&gpslna_pins_oh>;
pinctrl-3 = <&gpslna_pins_ol>;
status = "okay";
};
5.省gps晶體改爲不省gps晶體的修改方法:
修改device目錄下對應項目的WMT_SOC.cfg文件
co_clock_flag=0 //不省晶振
co_clock_flag=1 //省晶