Serial

In telecommunication and computer science, serial communication is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus. This is in contrast to parallel communication, where several bits are sent as a whole, on a link with several parallel channels. Wikipedia

Kernel Integration

Kernel Display Message

    root@edison:~# dmesg | grep -i serial
    [    0.000000] Kernel command line: rootwait root=PARTUUID=012b3303-34ac-284d-99b4-34e03a2335f4 rootfstype=ext4 console=ttyMFD2 earlyprintk=ttyMFD2,keep loglevel=4 g_multi.ethernet_config=cdc systemd.unit=multi-user.target hardware_id=00 g_multi.iSerialNumber=5e7bb54a65035af180191c2d7bd527b6 g_multi.dev_addr=02:00:86:d5:27:b6 platform_mrfld_audio.audio_codec=dummy
    [    0.704157] HSU serial 0000:00:04.0: FUNC: 0 driver: 0 addr:ff010000 len:80
    [    0.704215] HSU serial 0000:00:04.1: FUNC: 1 driver: 0 addr:ff010080 len:80
    [    0.705663] HSU serial 0000:00:04.2: FUNC: 2 driver: 0 addr:ff010100 len:80
    [    0.707102] HSU serial 0000:00:04.3: FUNC: 3 driver: 0 addr:ff010180 len:80
    [    0.744061] usbcore: registered new interface driver usbserial
    [    0.744199] usbserial: USB Serial support registered for pl2303
    [    3.758915] systemd[1]: Starting system-serial\x2dgetty.slice.
    [    3.833730] systemd[1]: Created slice system-serial\x2dgetty.slice.

    root@edison:~# dmesg | grep -i tty
    [    0.000000] Kernel command line: rootwait root=PARTUUID=012b3303-34ac-284d-99b4-34e03a2335f4 rootfstype=ext4 console=ttyMFD2 earlyprintk=ttyMFD2,keep loglevel=4 g_multi.ethernet_config=cdc systemd.unit=multi-user.target hardware_id=00 g_multi.iSerialNumber=5e7bb54a65035af180191c2d7bd527b6 g_multi.dev_addr=02:00:86:d5:27:b6 platform_mrfld_audio.audio_codec=dummy
    [    0.705116] 0000:00:04.1: ttyMFD0 at MMIO 0xff010080 (irq = 28) is a hsu_bt_port_p
    [    0.706565] 0000:00:04.2: ttyMFD1 at MMIO 0xff010100 (irq = 29) is a hsu_uart1_port_p
    [    0.707871] 0000:00:04.3: ttyMFD2 at MMIO 0xff010180 (irq = 54) is a hsu_uart2_port_p
    [    0.713301] console [ttyMFD2] enabled
    [    1.969453] Bluetooth: RFCOMM TTY layer initialized
    [    2.776422] systemd[1]: Expecting device dev-ttyMFD2.device...
    [    3.758915] systemd[1]: Starting system-serial\x2dgetty.slice.
    [    3.833730] systemd[1]: Created slice system-serial\x2dgetty.slice.
    [    3.833870] systemd[1]: Starting system-getty.slice.
    [    3.883637] systemd[1]: Created slice system-getty.slice.

Userspace Interfaces

Sysfs

Devfs

Applications / Libraries

Setup

Opkg

Pip

Apt-Get

Programs

Python

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