※UARTtoEEPROMwith8bitsMCU

• Used HT66F318 control GPIO, LED matrix, EEPROM, ADC, I2C... via UART(Same with RS-485)

• 利用Holtek MCU HT66F318 28sop UART做為與EEPROM(內置)或其他GPIO的溝通途徑...開工必備工具

• 專業便宜又好用, 不過案例竟然這樣的少, 太可憐! 看不下去!

• 首開範列是一個簡單利用PC軟件下達指令存取MCU內部的EEPROM(64byte), 但MCU內存緩衝故意弄小, 協議比照RS-485通訊協議格式. 8bit MCU 資源有限有許多限制慢慢挖掘吧!

• 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 Baudrate: 9600,n,8,1 (協議格式參照RS-485通訊協議格式)
  

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

• 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 V7.99
• HOLTEK C Compiler V3/Assembly
• HT66F318 Config
• HT66F318 28ssop Schematic Diagram

How to test it

• 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 03 00 00 00 04 A0 0A #讀取EEPROM位址0x0000,4組(共計8個bytes) MCU return設計最大每次讀取四組(8byte) 反饋如: 44 03 08 00 01 02 03 04 05 06 07 CRC CRC

• UART Formate(Write to MCU): 44 06 00 0A EE FF A0 0A #寫入EEPROM位址0x000A,資料為0xEEFF MCU return: 44 06 00 0A EE FF CRC CRC

Other

• UART access to ADC internal 10 bits resolution.
• UART access to ADC converter(HY3118 24bit ADC) via I2C bus.
• UART access to OLED 16x2 driver via SPI bus.