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added NanoPi Duo support #5

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added NanoPi Duo support #5

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15 changes: 15 additions & 0 deletions README-nanopiduo-support.md
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Original file line number Diff line number Diff line change
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# README_npiduo.md
Lukas, 2019-12-04
# to use WiringNP with NanoPiDuo and armbian ubuntu 18.04
added nanopi duo board support due to error:
$gpio readall
piBoardRev: Unable to determine board revision from /proc/cpuinfo
-> Is not NanoPi based board.
-> You may want to check:
-> http://www.lemaker.org/
open /sys/class/sunxi_info/sys_info failed.

## WiringNP fix
https://forum.armbian.com/topic/11426-wiringpi-for-nanopi-neo-air/
1. copy sys_info to /etc
2. normally build the project
6 changes: 6 additions & 0 deletions sys_info
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sunxi_platform : Sun8iw7p1
sunxi_secure : normal
sunxi_chipid : 2c21020e786746240000540000000000
sunxi_chiptype : 00000042
sunxi_batchno : 1
sunxi_board_id : 4(0)
4 changes: 2 additions & 2 deletions wiringPi/boardtype_friendlyelec.c
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Expand Up @@ -157,8 +157,8 @@ static int getAllwinnerBoardID(char* boardId, int boardIdMaxLen )
FILE *f;
int ret = -1;

if (!(f = fopen("/sys/class/sunxi_info/sys_info", "r"))) {
LOGE("open /sys/class/sunxi_info/sys_info failed.");
if (!(f = fopen("/etc/sys_info", "r"))) {
LOGE("open /etc/sys_info failed.");
return -1;
}

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