DMX512 单元
DMX Unit 是一款专为 DMX-512 数据传输场景设计的通信单元。它集成了 CA-IS3092W 隔离型半双工 RS-485 收发器，提供高达 5 kVrms 的电气隔离保护。板载 120Ω 终端电阻开关可匹配信号传输线的特性阻抗，防止信号反射与失真，并可根据使用场景进行连接。
支持以下产品：
MicroPython 应用示例 发送数据：
1# SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD 2# 3# SPDX-License-Identifier: MIT 4 5import os, sys, io 6import M5 7from M5 import * 8from unit import DMX512Unit 9import time 10 11 12Title = None 13label1 = None 14label0 = None 15dmx_0 = None 16 17 18ch_data = None 19 20 21def setup(): 22 global Title, label1, label0, dmx_0, ch_data 23 24 M5.begin() 25 Widgets.fillScreen(0x222222) 26 Title = Widgets.Title("DMX512Unit Send example", 3, 0xFFFFFF, 0x0000FF, Widgets.FONTS.DejaVu18) 27 label1 = Widgets.Label("Not Sent", 2, 129, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18) 28 label0 = Widgets.Label( 29 "Not initialized", 2, 76, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18 30 ) 31 32 dmx_0 = DMX512Unit(1, port=(13, 14), mode=1) 33 label0.setText(str("Initialized")) 34 ch_data = 0 35 36 37def loop(): 38 global Title, label1, label0, dmx_0, ch_data 39 M5.update() 40 label1.setText(str("Not Sent")) 41 dmx_0.write_data(1, ch_data) 42 dmx_0.write_data(2, ch_data) 43 dmx_0.write_data(3, ch_data) 44 ch_data = (ch_data if isinstance(ch_data, (int, float)) else 0) + 1 45 if ch_data >= 255: 46 ch_data = 0 47 label1.setText(str("Sent")) 48 time.sleep(0.7) 49 50 51if __name__ == "__main__": 52 try: 53 setup() 54 while True: 55 loop() 56 except (Exception, KeyboardInterrupt) as e: 57 try: 58 from utility import print_error_msg 59 60 print_error_msg(e) 61 except ImportError: 62 print("please update to latest firmware")
MicroPython 应用示例 接收数据：
1# SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD 2# 3# SPDX-License-Identifier: MIT 4 5import os, sys, io 6import M5 7from M5 import * 8from unit import DMX512Unit 9 10 11Title = None 12label0 = None 13label1 = None 14dmx_0 = None 15 16 17dmx_data = None 18dmx_data2 = None 19 20 21def dmx_0_channel1_receive_event(received_data): 22 global Title, label0, label1, dmx_0, dmx_data, dmx_data2 23 dmx_data = received_data 24 label0.setText(str((str("Channel 1:") + str(dmx_data)))) 25 26 27def dmx_0_channel2_receive_event(received_data): 28 global Title, label0, label1, dmx_0, dmx_data, dmx_data2 29 dmx_data2 = received_data 30 label1.setText(str((str("Channel 2:") + str(dmx_data2)))) 31 32 33def setup(): 34 global Title, label0, label1, dmx_0, dmx_data, dmx_data2 35 36 M5.begin() 37 Widgets.fillScreen(0x222222) 38 Title = Widgets.Title("DMX512Unit Rec example", 3, 0xFFFFFF, 0x0000FF, Widgets.FONTS.DejaVu18) 39 label0 = Widgets.Label("Channel 1:", 0, 57, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18) 40 label1 = Widgets.Label("Channel 2:", 2, 109, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18) 41 42 dmx_0 = DMX512Unit(1, port=(13, 14), mode=2) 43 dmx_0.attach_channel(1, dmx_0_channel1_receive_event) 44 dmx_0.attach_channel(2, dmx_0_channel2_receive_event) 45 dmx_0.receive_none_block() 46 47 48def loop(): 49 global Title, label0, label1, dmx_0, dmx_data, dmx_data2 50 M5.update() 51 52 53if __name__ == "__main__": 54 try: 55 setup() 56 while True: 57 loop() 58 except (Exception, KeyboardInterrupt) as e: 59 try: 60 from utility import print_error_msg 61 62 print_error_msg(e) 63 except ImportError: 64 print("please update to latest firmware")
UiFlow2 Master 应用示例：
UIFLOW2 从机示例：
dmx512_core2_send_example.m5f2
dmx512_core2_receive_example.m5f2
class DMX512Unit
Constructors
Methods
- DMX512Unit.dmx_init(mode) None
使用 UART 引脚和模式初始化 DMX512 通信。
- 参数:
mode – 工作模式（1 表示 Master，2 表示 Slave）。
UIFLOW2:
- DMX512Unit.write_data(channel, data) None
更新指定 DMX 通道的数据。数据将在下一次更新周期发送。
- 参数:
channel – DMX 通道编号（1-512）。
data – 要发送的数据值（0-255）。如果通道号超出范围，则会引发 ValueError。
UIFLOW2:
