Wireless Networks Lab

1
Wireless Networks Lab UART

• 2007/10/24

2
Environment

• BoardAPI
• vLedControl(0, true)
• HardwareAPI
• vAHI_xxx( )
• FontalBSP
• FontalButton -- btn_init()
• FontalLED -- led_init()
• Stack 802.15.4 MAC
• Application Queue API
• Service Access Point AppApi.h
• Access functions and structures used by the
  application to interact with the Jennic 802.15.4
  stack
• u32AppApiInit ()
• E_AHI_DEVICE_SYSCTRL, E_AHI_DEVICE_UART0, , and
  etc.

3
Sample

• The PCs UART connects to the on-chip UART of the
  FT6250 Kit. This sample code can let us figure
  out how to communicate between them with UART.
• HardwareAPI
• u8UartPort E_AHI_UART_0 or E_AHI_UART_1
• u8BaudRate 38400

vAHI_UartEnable(E_AHI_UART_0) vAHI_UartReset(E_AH
I_UART_0, TRUE, TRUE) vAHI_UartReset(E_AHI_UART_0
, FALSE, FALSE) vAHI_UartSetClockDivisor(E_AHI_U
ART_0, u8BaudRate) vAHI_UartSetControl(E_AHI_UART
_0, FALSE, FALSE,
E_AHI_UART_WORD_LEN_8, TRUE, FALSE)
4
Overview
Terminal
Serial Port
Typing in HyperTerminalex aaaaabbbcc
FT 6250
UART
which UART
ASCII code

• Connecting the sensor board to a PC using the
  programming cable.
• UART settings are in Appendix.

5
Flowchart
6
Pseudo code

• u32AHI_Init()
• u32AppApiInit(NULL, NULL, NULL, NULL, NULL,
  NULL)
• Set up UART
• Init LED
• Register UART Callback
• Utility function
• vUartPrint()
• vByteToString()

7
Requirement

• Review
• After comprehending the usage of UART, you are
  asked to
• When typing in the terminal, you should control
  each of the LEDs on/off through UART.
• When pressing each button of FT device, you
  should get different feedback in your terminal
  through UART.

8
Bonus

• Implement a small game.

Terminal
Serial Port

UART_0
UART_1
FT6250
FT 6251
UART_1
9
Appendix

• When using HyperTerminal, you should choose the
  serial port you used and configure the serial
  connection as follows 38400 bps, 8 data bits, no
  parity, 1 stop bit, and no handshaking.
• Ensure that your HyperTerminal is started after
  powering up the FT device.