Changes between Version 5 and Version 6 of serial


Ignore:
Timestamp:
12/27/2017 11:32:29 AM (7 months ago)
Author:
Tim Harvey
Comment:

added gpio details for Newport serial transceiver

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  • serial

    v5 v6  
    637637
    638638=== Newport ===
    639 Most Newport products have a flexible [http://dev.gateworks.com/datasheets/sp335e.pdf MaxLinear SP335E] RS-232/RS-485/RS-422 transceiver which is software configurable. For these boards the Bootloader {{{hwconfig}}} environment variable can be used to configure the functionality of the serial ports at power-up. See [wiki:newport/#hwconfig Newport bootloader hwconfig] for more details.
     639Most Newport products have a flexible [http://dev.gateworks.com/datasheets/sp335e.pdf MaxLinear SP335E] RS-232/RS-485/RS-422 transceiver which is software configurable. For these boards the Bootloader {{{hwconfig}}} environment variable can be used to configure the functionality of the serial ports at power-up between dual RS232 without flow control (default), single RS232 with hardware flow control, and RS485 (full/half duplex and optional termination). See [wiki:newport/#hwconfig Newport bootloader hwconfig] for more details.
     640
     641If you wish to configure the SP335E transceiver yourself you can control it at runtime through the following GPIO's (which is what the Boot firmware will do for you via the {{{hwconfig}}} variable):
     642 * GPIO21: UART_HALF - selects full (low) or half (high) duplex (RS485 mode only)
     643 * GPIO22: UART_TERM - disables (low) or enables (high) on-chip termination (RS485 mode only)
     644 * GPIO23: UART_RS485 - selects between RS232 (low) and RS245 (high) modes
     645
     646See [wiki:gpio gpio] for details on using GPIO from Linux userspace or use the U-Boot bootloader {{{gpio}}} command.
     647
    640648
    641649=== Laguna: GW2382 ===