2021-01-12 14:29:47 +08:00
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## 串口扩展函数
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### 1.iostream\_serial\_create
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2021-01-14 10:00:45 +08:00
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> 创建串口输入输出流对象。
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#### 原型
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```js
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istream_file_create(device, baudrate) => object
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```
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### 完整示例
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2021-01-12 14:29:47 +08:00
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```js
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//
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// start serial echo server first
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// ./bin/serial_recv 4000
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//
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a = iostream_serial_create("/dev/ttys001", 0)
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b = iostream_get_ostream(a)
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c = iostream_get_istream(a)
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assert(ostream_write_uint32(b, 6) == 4)
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assert(ostream_write_string(b, "hello\n") == 6)
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assert(istream_read_uint32(c, 3000) == 6)
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assert(istream_read_string(c, 6, 3000) == "hello\n")
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unset(c)
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unset(b)
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unset(a)
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```
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