UART — 双工串行通信总线

类

class UART(...)

使用示例::(python)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
# coding=utf-8
# This is a sample Python script.
import utime
from driver import UART

print("-------------------uart test--------------------")
print("-----How to test: connect PIN10 and PIN12-------")
uart = UART();
uart.open("serial2")
utime.sleep_ms(1000)
writeBuf  = bytearray([0x41, 0x42, 0x43, 0x44]);
for i in range(10):
    uart.write(writeBuf)
    utime.sleep_ms(1000)
    readBuf = bytearray(4)
    recvSize = uart.read(readBuf)
    utime.sleep_ms(100)
    print(recvSize)
    print(readBuf)
uart.close()

配置信息::(json)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
# coding=utf-8
# This is a sample cjson file.
{
    "version": "0.0.1",
    "io": {
      "serial1":{
        "type":"UART",
        "port":1,
        "dataWidth":8,
        "baudRate":115200,
        "stopBits":1,
        "flowControl":"disable",
        "parity":"none"
      },
      "serial2":{
        "type":"UART",
        "port":2,
        "dataWidth":8,
        "baudRate":115200,
        "stopBits":1,
        "flowControl":"disable",
        "parity":"none"
      }
    },
    "debugLevel": "DEBUG",
    "repl":"disable"
  }

操作函数

open(jsonConfigPath, type)

开打UART并根据json文件配置实例

write(dataBuffer)

发送串口数据，该函数为阻塞函数，串口发送完成后才会返回

read(dataBuffer)

主动读取指定bytes的串口数据

close()

关闭UART实例