RS485

案例程序

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
RS485_0 = unit.get(unit.RS485, unit.PORTC)

RS485_0.init(1, baudrate=9600, data_bits=8, stop_bits=1, parity=None, ctrl_pin=None)
while True:
  RS485_0.write('Hello M5Stack')
  print((str('Msg:') + str((RS485_0.read()))))
  wait(1)
  wait_ms(2)

功能说明

RS485_0.init(1, baudrate=9600, data_bits=8, stop_bits=1, parity=None, ctrl_pin=None)

• 初始化Unit RS485
  • UART:1/2
  • Baudrate:value
  • Data Bits:7/8/9
  • Stop Bits:1/2
  • Parity:None/Even/Odd
  • Ctrl pin

print(RS485_0.any())

• 获取缓存

print(RS485_0.read())

• 获取所有接收数据

print(RS485_0.readline())

• 获取一行接收数据

print(RS485_0.read(10))

• 读取字符

print(RS485_0.read_coils(1, 1, 0))

• 读取线圈从地址

print(RS485_0.read_discrete_inputs(1, 1, 0))

• 读取离散输入

print(RS485_0.read_holding_registers(1, 1, 0, True))

• 读取保持寄存器

print(RS485_0.read_input_registers(1, 1, 0, True))

• 读取输入寄存器

RS485_0.write('')

• 串口写入字符串

RS485_0.write(''+"\r\n")

• 串口写入一行字符串

print(RS485_0.write_multiple_coils(1, 1, 0))

• 获取写入多个线圈地址

print(RS485_0.write_multiple_registers(1, 1, 0, True))

• 获取写入多个保持寄存器地址

RS485_0.write(bytes([0, 0, 0]))

• 串口写入原始数据

print(RS485_0.write_single_coil(1, 1, 0))

• 获取写入单个线圈地址

print(RS485_0.write_single_register(1, 1, 0, True))

• 获取写入单个保持寄存器