Demand Peripherals     Robotics and Automation Made Easy

HostSerial: Tx/Rx Serial Host Interface

The Host Serial interface can replace the USB serial interface after the Baseboard has booted. The Host Serial interface will have much lower bandwidth compared to the the USB serial interface but it might also have lower latency.



The system supports only one HostSerial interface but it can be in any slot. The FPGA Tx line _to_ the host is on the first FPGA pin, Pin #2 on the 8 pin connector. The Rx line for data _from_ the host is on the second FPGA pin, Pin #4 on the 8 pin connector. The third and fourth FPGA pins are unused and should not be connected. The system defaults to using the USB interface. To use the serial interface set it to enabled with the correct baud rate. Only one interface, USB or serial, can be enabled at a time.



config : baud rate and enable flag.
The baud rate must be one of 460800, 230400, 153600, or 115200. The enable flag is either 'e' or 'd' to enable or disable the host serial interface.

The enumerator controls access to the host. After enabling the host serial interface be sure to set the enumerator 'port' to the new serial port.



Switch from the FTDI/USB interface to the Tx/Rx interface at 115200 baud.

    dpset hostserial config 115200 e
    dpset enumerator port /dev/ttyS0


FPGA Defined Peripherals
User Interface
FPGA Configuration
FPGA Buttons & LEDs
Host Tx/Rx Interface
AVR Interface
Stereo Audio Amplifier
Text LCD and Keypad
Quad WS2812 Interface
Quad Slide Pot
IR Recv/Xmit
6 Digit LCD
RC Decoder
Keyfob RF Decoder
Rotary Encoder Interface
Quad Touch Interface
Motion Control
Dual DC Motor Controller
Dual Quadrature Decoder
Quad 13 Bit Servo
Bipolar Stepper Controller
Unipolar Stepper Controller
Simple Input / Output
Quad Binary Output
Quad Binary Input
Octal Input/Output
32 Channel Binary Output
32 Channel Binary Input
Quad Serial Output
Octal Serial Output
Octal 12-bit ADC
Quad Ping))) Interface
Pololu QTR Interface
Octal SRF04 Interface
Generic I2C
Generic SPI
Octal 8-Bit DAC
Quad Digital Potentiometer
Quad PWM Output
Quad PWM Input
Quad Event Counter
Real Time Clock
Dual Pulse Generator

Interface Cards
Control Cards
User Interface
Stereo Audio Amplifier
IR Recv/xmit
Six Digit LCD Display
Keyfob RF Receiver
Rotary Encoder
Quad Switch Card
Text LCD / keypad
Quad Slide Pot
Quad Touch Interface
Motion Control
Dual 7-amp H-bridge
Quad Open Drain Driver
Quad 10 Amp Relay Card
Input / Output
Octal 8-Bit DAC
Quad Digital Potentiometer
Octal 12-bit ADC
Octal SRF04
I2C Prototyping
SPI Prototyping
USB 2.0 Hub
Real Time Clock
Octal Input/Output
32 Channel Input
32 Channel Output
Power Distribution Card
15 Amp Power Distribution
5 Volt Switching Regulator
ATX Power Break-Out Card
Disk Drive Power Break-Out
MP43 Aluminum Mounting Plate
WW4 Large Prototyping Card
WW2 Prototyping Card
WW1 Small Prototyping Card
SMP SMD Prototyping Card