{"id":44578,"date":"2023-12-09T00:45:28","date_gmt":"2023-07-17T19:40:17","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8golang-raspberry-pi-lps331ap-%e6%b5%8b%e9%87%8f%e4%ba%86%e6%b0%94%e5%8e%8b%e5%92%8c%e6%b8%a9%e5%ba%a6%e3%80%82\/"},"modified":"2024-01-15T12:08:38","modified_gmt":"2024-01-15T04:08:38","slug":"%e4%bd%bf%e7%94%a8golang-raspberry-pi-lps331ap-%e6%b5%8b%e9%87%8f%e4%ba%86%e6%b0%94%e5%8e%8b%e5%92%8c%e6%b8%a9%e5%ba%a6%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8golang-raspberry-pi-lps331ap-%e6%b5%8b%e9%87%8f%e4%ba%86%e6%b0%94%e5%8e%8b%e5%92%8c%e6%b8%a9%e5%ba%a6%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Golang + Raspberry Pi + LPS331AP \u6d4b\u91cf\u4e86\u6c14\u538b\u548c\u6e29\u5ea6"},"content":{"rendered":"

\u6211\u662fGo Advent Calendar\u7b2c23\u5929\u7684\u8d1f\u8d23\u4eba@yanolab\u3002\u8fd9\u662f\u6211\u5728Qiita\u4e0a\u7684\u7b2c\u4e00\u7bc7\u53d1\u6587\u3002<\/p>\n

\u6211\u60f3\u5728\u7b2c23\u5929\u7684\u6587\u7ae0\u4e2d\u4ecb\u7ecd\u4e00\u4e0b\u5982\u4f55\u4f7f\u7528Golang + Raspberry Pi + LPS331AP\uff08I2C\u6c14\u538b\u4f20\u611f\u5668\u6a21\u5757\uff09\u6765\u6d4b\u91cf\u6c14\u538b\u548c\u6e29\u5ea6\u3002<\/p>\n

Golang \u7684\u4e00\u4e2a\u4e2a\u4eba\u559c\u597d\u4e4b\u5904\u5728\u4e8e\u8de8\u5e73\u53f0\u7f16\u8bd1\u975e\u5e38\u5bb9\u6613\u3002\u4f5c\u4e3a\u4e00\u4e2a\u7ecf\u5e38\u7f16\u5199\u591a\u5e73\u53f0\u5de5\u5177\u7684\u4eba\uff0c\u8fd9\u4e00\u70b9\u5bf9\u6211\u6765\u8bf4\u975e\u5e38\u65b9\u4fbf\u3002\u6b64\u5916\uff0cGolang \u8fd8\u652f\u6301\u4e3a ARM \u8f93\u51fa\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728\u901a\u7528\u7684 IA \u8bbe\u5907\u4e0a\u8fdb\u884c\u5f00\u53d1\u3002\u800c\u4e14\uff0c\u901a\u8fc7 Golang \u7f16\u8bd1\u7684\u7a0b\u5e8f\u751a\u81f3\u4e0d\u4f9d\u8d56\u4e8e libc\uff0c\u6240\u4ee5\u90e8\u7f72\u53ea\u9700\u5c06\u5176\u590d\u5236\u5230\u76ee\u6807\u673a\u5668\u4e0a\u3002\u7b80\u5355\u5f97\u4ee4\u4eba\u96be\u4ee5\u7f6e\u4fe1\u3002<\/p>\n

\u6700\u8fd1\uff0c\u8d2d\u4e70Raspberry Pi\u76f8\u5bf9\u5bb9\u6613\u3002\u5728\u4e9a\u9a6c\u900a\u4e0a\u4e5f\u80fd\u4e70\u5230\u3002LPS331AP\u80fd\u5728\u79cb\u6708\u8d2d\u4e70\u5230\u3002\u867d\u7136\u6709\u5404\u79cd\u5404\u6837\u7684\u4f20\u611f\u5668\u6a21\u5757\uff0c\u4f46\u63a8\u8350\u9009\u7528\u80fd\u591f\u8fdb\u884cI2C\u901a\u4fe1\u7684\u6a21\u5757\uff0c\u56e0\u4e3a\u5728Raspberry Pi\u4e0a\u64cd\u4f5c\u8f83\u4e3a\u5bb9\u6613\u3002
\n\u4e3a\u4e86\u5728Raspberry Pi\u4e0a\u4e0e\u4f20\u611f\u5668\u6a21\u5757\u8fdb\u884c\u4ea4\u4e92\uff0c\u4f7f\u7528I2C\u662f\u7b80\u5355\u7684\u3002\u6709\u5173Raspberry Pi\u4e0eLPS331AP\u6a21\u5757\u7684\u8fde\u63a5\u65b9\u6cd5\u7b49\uff0c\u8bf7\u53c2\u8003\u6b64\u5904\u7b49\u8d44\u6599\u3002\u7531\u4e8e\u6709\u5f88\u591a\u76f8\u5173\u6587\u7ae0\uff0c\u8bf7\u52aa\u529b\u67e5\u627e\u3002\u53ea\u8981\u4f20\u611f\u5668\u548cRaspberry Pi\u80fd\u901a\u8fc7I2C\u8fdb\u884c\u4ea4\u4e92\uff0c\u51c6\u5907\u5de5\u4f5c\u5c31\u5b8c\u6210\u4e86\u3002<\/p>\n

The given question (\u672c\u984c)<\/h2>\n

\u56e0\u4e3a\u8fd9\u662f\u4e00\u7bc7\u5173\u4e8eGolang\u7684\u6587\u7ae0\uff0c\u6240\u4ee5\u8fd9\u6b21\u6211\u4eec\u5c06\u901a\u8fc7Golang\u8fdb\u884cI2C\u901a\u4fe1\u3002\u6211\u7acb\u523b\u5411\u8c37\u6b4c\u8001\u5e08\u8be2\u95ee\uff0c\u679c\u7136\u6709\u524d\u8f88\u505a\u8fc7\u7c7b\u4f3c\u7684\u5de5\u4f5c\uff0c\u4f46\u5f88\u9057\u61be\u5f15\u7528\u7684\u6587\u7ae0\u5df2\u7ecf\u6d88\u5931\u5728404\u9875\u9762\u2026\u2026\u4e0d\u8fc7\uff0c\u597d\u5728\u4ee3\u7801\u5e93\u8fd8\u5b58\u5728\uff0c\u6240\u4ee5\u5f00\u53d1\u5e94\u8be5\u6ca1\u95ee\u9898\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u6765\u4e3a\u4f7f\u7528go\u8fdb\u884c\u4ea4\u53c9\u7f16\u8bd1\u505a\u51c6\u5907\u3002\u8bf7\u8f6c\u5230\u5b89\u88c5go\u7684\u6587\u4ef6\u5939\u4e2d\u7684src\u76ee\u5f55\uff0c\u5e76\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n

\u8bf7\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u6765\u8fdb\u884c\u4ea4\u53c9\u7f16\u8bd1\uff1a
\nsudo GOARCH=arm .\/make.bash<\/p>\n

\u901a\u8fc7\u8fd0\u884c\u6784\u5efa\uff0c\u53ef\u4ee5\u51c6\u5907\u7528\u4e8eARM\u7684\u4ea4\u53c9\u7f16\u8bd1\u73af\u5883\u3002\u975e\u5e38\u7b80\u5355\u5462\u3002<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u5c06\u5e93\u5b89\u88c5\u5728GOPATH\u76ee\u5f55\u4e0b\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5e93\u7684\u5b89\u88c5\u3002<\/p>\n

\u6309\u539f\u751f\u4e2d\u6587\u5c06\u4ee5\u4e0b\u53e5\u5b50\u6539\u5199\uff0c\u53ea\u9700\u63d0\u4f9b\u4e00\u79cd\u9009\u62e9\uff1a
\n\u4f7f\u7528“GOARCH=arm“\u547d\u4ee4\u83b7\u53d6“bitbucket.org\/gmcbay\/i2c“\u5e93\u3002<\/p>\n

\u8bf7\u786e\u4fdd\u8bbe\u7f6e GOARCH=arm\u3002\u5982\u679c\u5fd8\u8bb0\u8bbe\u7f6e\uff0c\u5c06\u4e3a\u4e3b\u673a\u7684 CPU \u8fdb\u884c\u6784\u5efa\u3002
\n\u7136\u540e\uff0c\u53ea\u9700\u8981\u7f16\u5199\u4e00\u4e2a\u901a\u8fc7 I2C \u901a\u4fe1\u4ece Raspberry Pi \u8bfb\u53d6 LPS331AP \u4f20\u611f\u5668\u6570\u636e\u7684\u7a0b\u5e8f\u5373\u53ef\u3002\u4f20\u611f\u5668\u7684\u89c4\u683c\u8bf4\u660e\u4e66\u53ef\u4ee5\u5728\u79cb\u6708\u7535\u5b50\u7684\u7f51\u9875\u4e0a\u627e\u5230\uff0c\u5e76\u4e14\u53ef\u4ee5\u53c2\u8003\u8be5\u8bf4\u660e\u4e66\u8fdb\u884c\u5b9e\u73b0\u3002\u57fa\u672c\u4e0a\uff0c\u53ea\u9700\u5411\u63a7\u5236\u5bc4\u5b58\u5668 (0x20) \u5199\u5165\u8981\u8bfb\u53d6\u6570\u636e\u7684\u6307\u793a\uff0c\u7136\u540e\u4ece\u4e13\u7528\u5bc4\u5b58\u5668 (0x28-0x2a, 0x2b-0x2c) \u4e2d\u8bfb\u53d6\u6570\u636e\u5373\u53ef\u3002\u6211\u5c06\u9644\u4e0a\u4e00\u4e2a\u4ece Golang \u4e2d\u4f7f\u7528 lps331ap \u7684\u4ee3\u7801\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n

package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n        \"bitbucket.org\/gmcbay\/i2c\"<\/span>\r\n        \"errors\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> LPS331AP<\/span> struct<\/span> {<\/span>\r\n        bus<\/span>    *<\/span>i2c<\/span>.<\/span>I2CBus<\/span>\r\n        addr<\/span>   byte<\/span>\r\n        active<\/span> bool<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> newDevice<\/span>()<\/span> *<\/span>LPS331AP<\/span> {<\/span>\r\n        return<\/span> &<\/span>LPS331AP<\/span>{}<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> Init<\/span>(<\/span>busNumber<\/span> byte<\/span>,<\/span> addr<\/span> byte<\/span>)<\/span> error<\/span> {<\/span>\r\n        var<\/span> err<\/span> error<\/span>\r\n        l<\/span>.<\/span>bus<\/span>,<\/span> err<\/span> =<\/span> i2c<\/span>.<\/span>Bus<\/span>(<\/span>busNumber<\/span>)<\/span>\r\n        l<\/span>.<\/span>addr<\/span> =<\/span> addr<\/span>\r\n\r\n        return<\/span> err<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> Read<\/span>(<\/span>reg<\/span> byte<\/span>)<\/span> (<\/span>byte<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n        buf<\/span>,<\/span> err<\/span> :=<\/span> l<\/span>.<\/span>bus<\/span>.<\/span>ReadByteBlock<\/span>(<\/span>l<\/span>.<\/span>addr<\/span>,<\/span> reg<\/span>,<\/span> 1<\/span>)<\/span>\r\n        if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                return<\/span> 0<\/span>,<\/span> err<\/span>\r\n        }<\/span>\r\n\r\n        return<\/span> buf<\/span>[<\/span>0<\/span>],<\/span> nil<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> ReadPressure<\/span>()<\/span> (<\/span>float32<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n        buf<\/span> :=<\/span> make<\/span>([]<\/span>byte<\/span>,<\/span> 3<\/span>)<\/span>\r\n\r\n        for<\/span> idx<\/span> :=<\/span> 0x28<\/span>;<\/span> idx<\/span> <=<\/span> 0x2a<\/span>;<\/span> idx<\/span>++<\/span> {<\/span>\r\n                var<\/span> err<\/span> error<\/span>\r\n                buf<\/span>[<\/span>idx<\/span>-<\/span>0x28<\/span>],<\/span> err<\/span> =<\/span> l<\/span>.<\/span>Read<\/span>(<\/span>byte<\/span>(<\/span>idx<\/span>))<\/span>\r\n                if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                        return<\/span> 0<\/span>,<\/span> err<\/span>\r\n                }<\/span>\r\n        }<\/span>\r\n\r\n        return<\/span> float32<\/span>(<\/span>int<\/span>(<\/span>buf<\/span>[<\/span>2<\/span>])<\/span><<<\/span>16<\/span>|<\/span>int<\/span>(<\/span>buf<\/span>[<\/span>1<\/span>])<\/span><<<\/span>8<\/span>|<\/span>int<\/span>(<\/span>buf<\/span>[<\/span>0<\/span>]))<\/span> \/<\/span> 4096.0<\/span>,<\/span> nil<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> ReadTemperature<\/span>()<\/span> (<\/span>float32<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n        buf<\/span> :=<\/span> make<\/span>([]<\/span>byte<\/span>,<\/span> 2<\/span>)<\/span>\r\n\r\n        for<\/span> idx<\/span> :=<\/span> 0x2b<\/span>;<\/span> idx<\/span> <=<\/span> 0x2c<\/span>;<\/span> idx<\/span>++<\/span> {<\/span>\r\n                var<\/span> err<\/span> error<\/span>\r\n                buf<\/span>[<\/span>idx<\/span>-<\/span>0x2b<\/span>],<\/span> err<\/span> =<\/span> l<\/span>.<\/span>Read<\/span>(<\/span>byte<\/span>(<\/span>idx<\/span>))<\/span>\r\n                if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                        return<\/span> 0<\/span>,<\/span> err<\/span>\r\n                }<\/span>\r\n        }<\/span>\r\n\r\n        return<\/span> 42.5<\/span> +<\/span> float32<\/span>(<\/span>^<\/span>(<\/span>int16<\/span>(<\/span>buf<\/span>[<\/span>1<\/span>])<\/span><<<\/span>8<\/span>|<\/span>int16<\/span>(<\/span>buf<\/span>[<\/span>0<\/span>]))<\/span>+<\/span>1<\/span>)<\/span>*-<\/span>1.0<\/span>\/<\/span>480.0<\/span>,<\/span> nil<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> Active<\/span>()<\/span> error<\/span> {<\/span>\r\n        id<\/span>,<\/span> err<\/span> :=<\/span> l<\/span>.<\/span>Read<\/span>(<\/span>0x0f<\/span>)<\/span>\r\n        if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                return<\/span> err<\/span>\r\n        }<\/span>\r\n        if<\/span> id<\/span> !=<\/span> 0xbb<\/span> {<\/span>\r\n                return<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"Invalid device.\"<\/span>)<\/span>\r\n        }<\/span>\r\n\r\n        if<\/span> err<\/span> :=<\/span> l<\/span>.<\/span>bus<\/span>.<\/span>WriteByte<\/span>(<\/span>l<\/span>.<\/span>addr<\/span>,<\/span> 0x20<\/span>,<\/span> 0x90<\/span>);<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                return<\/span> err<\/span>\r\n        }<\/span>\r\n\r\n        l<\/span>.<\/span>active<\/span> =<\/span> true<\/span>\r\n\r\n        return<\/span> nil<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>l<\/span> *<\/span>LPS331AP<\/span>)<\/span> Deactive<\/span>()<\/span> error<\/span> {<\/span>\r\n        if<\/span> !<\/span>l<\/span>.<\/span>active<\/span> {<\/span>\r\n                return<\/span> nil<\/span>\r\n        }<\/span>\r\n\r\n        if<\/span> err<\/span> :=<\/span> l<\/span>.<\/span>bus<\/span>.<\/span>WriteByte<\/span>(<\/span>l<\/span>.<\/span>addr<\/span>,<\/span> 0x20<\/span>,<\/span> 0x0<\/span>);<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                return<\/span> err<\/span>\r\n        }<\/span>\r\n\r\n        l<\/span>.<\/span>active<\/span> =<\/span> false<\/span>\r\n\r\n        return<\/span> nil<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ea\u9700\u5728\u4e3b\u51fd\u6570\u4e2d\u4f7f\u7528\u4e0a\u8ff0\u7ed3\u6784\u4f53\uff0c\u5e76\u5c06\u8bfb\u53d6\u7684\u6570\u636e\u5199\u5165\u63a7\u5236\u53f0\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n        \"fmt\"<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> execOrDie<\/span>(<\/span>f<\/span> func<\/span>()<\/span> error<\/span>)<\/span> {<\/span>\r\n        if<\/span> err<\/span> :=<\/span> f<\/span>();<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n                panic<\/span>(<\/span>err<\/span>)<\/span>\r\n        }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n        device<\/span> :=<\/span> newDevice<\/span>()<\/span>\r\n\r\n        execOrDie<\/span>(<\/span>func<\/span>()<\/span> error<\/span> {<\/span> return<\/span> device<\/span>.<\/span>Init<\/span>(<\/span>1<\/span>,<\/span> 0x5d<\/span>)<\/span> })<\/span>\r\n        execOrDie<\/span>(<\/span>device<\/span>.<\/span>Active<\/span>)<\/span>\r\n        defer<\/span> device<\/span>.<\/span>Deactive<\/span>()<\/span>\r\n\r\n        pressure<\/span>,<\/span> _<\/span> :=<\/span> device<\/span>.<\/span>ReadPressure<\/span>()<\/span>\r\n        temperature<\/span>,<\/span> _<\/span> :=<\/span> device<\/span>.<\/span>ReadTemperature<\/span>()<\/span>\r\n\r\n        fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%.2f<\/span>\\t<\/span>%.2f<\/span>\\n<\/span>\"<\/span>,<\/span> pressure<\/span>,<\/span> temperature<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8bf7\u5982\u4e0b\u8fdb\u884c\u6784\u5efa\u3002<\/p>\n
\u4f7f\u7528\u539f\u751f\u7684\u4e2d\u6587\u8fdb\u884c\u6539\u8ff0\uff1a\u7528 `GOARCH=arm go build *.go` \u8fdb\u884c\u7f16\u8bd1\u3002<\/p>\n
\u53ea\u9700\u4f7f\u7528SCP\u6216\u5176\u4ed6\u65b9\u5f0f\u5c06\u751f\u6210\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u8fdb\u884c\u590d\u5236\uff0c\u5373\u53ef\u6267\u884c\u3002<\/p>\n
\u7ed3\u675f\u4e86<\/h2>\n
\u975e\u5e38\u62b1\u6b49\u5907\u611f\u5230\u51c6\u5907\u4e0d\u8db3\uff0c\u4f46\u662f\u5982\u679c\u60a8\u4f7f\u7528 Golang \u548c\u6811\u8393\u6d3e\uff0c\u53ef\u4ee5\u8f7b\u677e\u5236\u4f5c\u4e00\u4e2a\u7b80\u5355\u7684\u4f20\u611f\u5668\u8bbe\u5907\u3002\u6b64\u5916\uff0cGolang \u8fd8\u53ef\u4ee5\u8f7b\u677e\u521b\u5efa Web \u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5b9e\u65f6\u53d1\u5e03\u83b7\u53d6\u5230\u7684\u6570\u636e\uff0c\u6216\u4f7f\u7528\u6807\u51c6\u5e93\u7684\u8fdc\u7a0b\u8fc7\u7a0b\u8c03\u7528\uff08RPC\uff09\u6784\u5efa\u4f20\u611f\u5668\u7f51\u7edc\uff0c\u8fd9\u4e5f\u5f88\u6709\u8da3\u3002\u60a8\u4e5f\u53ef\u4ee5\u5c06\u6570\u636e\u6536\u96c6\u5230 Google webapps \u4e2d\u3002Golang \u771f\u68d2\uff01\uff01\uff01<\/p>\n
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