15 Turn on HUART

V0.0.1

15.1 Histroy

  • 2014-05-30, rayoslee, release V0.0.1

15.2 FAQ

  1. How to enable HUART port ?

    • go to yourBSP/linux-2.6.35.4_fa93, and make menuconfig
      Device Drivers>Character devices>Serial drivers
      enable Nuvoton W55FA93 HUART support

    • vi .config to change boot option, UART’s device name is ttyS1, HUART’s device name is ttyS0 in S605-32 demo kit.
      ---CONFIG_CMDLINE="root=/dev/ram0 console=ttyS1,115200n8 rdinit=/sbin/init mem=32M vt.global_cursor_default=0"
      +++CONFIG_CMDLINE="root=/dev/ram0 console=ttyS0,115200n8 rdinit=/sbin/init mem=32M vt.global_cursor_default=0"

      it can not work for both ttyS.
      CONFIG_CMDLINE="root=/dev/ram0 console=ttyS1,115200n8 console=ttyS0,115200n8 rdinit=/sbin/init mem=32M vt.global_cursor_default=0"
      it can work for different communications ttyS or tty
      CONFIG_CMDLINE="root=/dev/ram0 console=tty0 console=ttyS0,115200n8 rdinit=/sbin/init mem=32M vt.global_cursor_default=0"

  2. How to send message from HUART port to UART port ?
    • In S605-32 demo kit, uboot’s debug message outputs to ttyS1. So you can echo it from ttyS0.
      echo hello iaminttyS0 > /dev/ttyS1