平臺(tái)芯片：全志A40I

內(nèi)核版本：linux-3.10

操作系統(tǒng)：Linux

ADC移植調(diào)試步驟：

1、驅(qū)動(dòng)使用

內(nèi)核自帶ADC驅(qū)動(dòng)，驅(qū)動(dòng)

位置：lichee/linux-3.10/drivers/hwmon/adcxx.c

注：該驅(qū)動(dòng)適配1轉(zhuǎn)2、4、8路ADC。

2、設(shè)備樹(shù)配置

spi2: spi@01c17000 { compatible = "allwinner,sun8i-spi"; clock-frequency = <1000000>; status = "ok"; spidev@0 { #address-cells = <1>; #size-cells = <1>; compatible = "adcxx8s"; //轉(zhuǎn)多少路就對(duì)應(yīng)多少，此處是1轉(zhuǎn)8， reg = <0>; spi-max-frequency = <100000>; status = "ok"; }; };

3、查看ADC值

編譯后即可在系統(tǒng)/sys/class/hwmon/hwmon1/device內(nèi)查看到對(duì)應(yīng)節(jié)點(diǎn)生成，cat即可獲取對(duì)應(yīng)通道adc值