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Add nanopi_gpio/README.md

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smallsolar 2024-09-25 10:03:14 +00:00
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https://forum.armbian.com/topic/5647-nanopi-neo-wiringnp-missing-sunxi_infosys_info/
`/etc/sys_info/`
```
sunxi_platform : Sun8iw7p1
sunxi_secure : normal
sunxi_chipid : 2c21020e786746240000540000000000
sunxi_chiptype : 00000042
sunxi_batchno : 1
sunxi_board_id : 1(0)
```
in the file `wiringPi/boardtype_friendlyelec.c` look for the lines:
```
if (!(f = fopen("/sys/class/sunxi_info/sys_info", "r"))) {
if (!(f = fopen("/etc/sys_info", "r"))) {
LOGE("open /sys/class/sunxi_info/sys_info failed.");
return -1;
}
}
```