louisopen / UARTtoHT66F318

HT66F318 uart applications, UART access to MCU many functions with Modbus of RS-485 protocol. 創建專案用

※UART with HT66F318 applications

• Using the UART port(Same RS-485 port) access GPIO port, EEPROM(64bytes), ADC(8ch 12bits), PWM output(10bit), Capture, OLED display... via HT66F318 UART port.
  專案利用PC or Raspberry Pi or Arduino 軟件主控下達UART通訊指令(Same RS-485 port)
  以存取HT66F318 GPIO port, EEPROM(64bytes), ADC(8ch 12bits), PWM output(10bit), Capture, OLED display...
  

• 在MCU資源不足或是應用裝置缺乏時, 即可以自己製造簡單的應用裝置, Host即可透過UART來控制這個裝置.
  

• Project Option:
  HXT (External 8MHz X'tal): 可選項有:HXT(400K~16Mhz),HIRC4M,HIRC8M,HIRC12M
  LICR (Low speed internal RC for TB0/TB1): 可選項有:LXT(32.768Khz),LIRC(32Khz)
  WatchDog: enable
  

• UART port baudrate setting 9600,N,8,1 ;Protocol format refer RS-485 Modbus & CRC-16
  通訊協議格式參照RS-485通訊協議格式(Modbus & CRC-16).
  

• TB0,1 enable LIRC interrupt for 0.514sec, 0.514sec
  

• TM0 enable HXT interrupt for 200us
  

• HT-IDE3000 HT66F317/HT66F318 28ssop with HT-IDE3000 & e-Link & e-WriterPro
  文件HT66F318 Document
  模擬&除錯Development & DebugIDE3000 & ICE
  燒入器Progrmming & writerHOPE3000 & e-WriterPro
  

Relevant information

• HT-IDE3000 V8.02
• HOLTEK C Compiler V3/Assembly
• HT66F318 Config, used 8Mhz X'tal external, VDD/VDDA binding
• HT66F318 28ssop Schematic Diagram

How to test or used

利用PC通訊軟件做為主動工具, 協議(9600,n,8,1), 格式比照RS-485格式(PC指令CRC用 A0 0A代替, MCU反饋的為CRC-16)

• For Example:
• UART Formate(Get from MCU): 44 02 00 00 00 00 A0 0A #Reture test MCU return: 44 02 04 55 AA 55 AA CRC CRC