PC Keypad software

AN2334

14/22

4

PC Keypad software

Before switching on the board, the PC “Keypad” software must be run, defining the parallel

port base address (see Windows Device Manager) and the COM serial port to be used.

PC software has four different functions: Keyboard, dashboard, LIN analyzer, VNH2 and

L9950 diagnostic view.

–

Keyboard is connected to the microcontroller via a parallel port and provides to

the microcontroller an 8-bit word that encodes all possible user actions as

described in the following Table 8 and Table 9:

Table 8.

Window and door lock coding

Window

Door

Parallel Port

Up Left

Down Left

Up Right

Down Right

Lock / Unlock

0

000

0

192

0

001

0

194

0

101

0

202

0

100

0

200

0

010

0

196

1

010

0

212

1

000

0

208

0

000

1

193

0

001

1

195

0

101

1

203

0

100

1

201

0

010

1

197

1

010

1

213

1

000

1

209