XMC LCD 8080时序例程为什么数据总线好多用普通IO口

只看该作者 · 2021-3-26 12:11

LCD 8080时序例程为什么数据总线好多用普通IO口，而不是XMC数据口，不会影响速度吗？

只看该作者 · 2021-3-26 14:26

便于将程序移植到只有普通IO口的单片机

只看该作者 · 2021-3-26 14:29

不是很明白，LCD都是XMC外设IO啊。你说的是触摸屏的IO吧。
      This demo is based on the AT-START-F403A board, for LittlevGL GUI demo show.
      Use the XMC firmware library and an associate driver to perform read/write operations on the LCD.
      And use SPI3 drive touch screen,user can drow picture on the LCD.When used must be use the TFT LCD Touch Demo Board v1.x.
      Attention: TFT_LCD_DEMO BOARD LCD ID is 0x9341 and the touchscreen is resistive touchscreen.

      The  pin to pin with LCD and XMC(16 bits):
      GPIO             PD3    LCD_RESET
      GPIO             PB0    LCD_BL
      XMC_A16       PD11 LCD_RS
      XMC_NE1       PD7    LCD_CS
      XMC_NWE    PD2    LCD_WR
      XMC_NOE       PC5    LCD_RD
      XMC_D0       PB14       DATA[0]
      XMC_D1       PC6       DATA[1]
      XMC_D2       PC11       DATA[2]
      XMC_D3       PC12       DATA[3]
      XMC_D4       PA2       DATA[4]
      XMC_D5       PA3       DATA[5]
      XMC_D6       PA4       DATA[6]
      XMC_D7       PA5       DATA[7]
      XMC_D8       PE11       DATA[8]
      XMC_D9       PE12       DATA[9]
      XMC_D10       PE13       DATA[10]
      XMC_D11       PE14       DATA[11]
      XMC_D12       PE15       DATA[12]
      XMC_D13       PB12       DATA[13]
      XMC_D14       PD9       DATA[14]
      XMC_D15       PD10       DATA[15]