Freescale Semiconductor DEMOJM Microcontroller Evaluation Board DEMOJM DEMOJM Benutzerhandbuch

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DEMOJM User Manual

There are three commands which may be accepted. All commands must end 
in the special characters #$0D and #$0A which are CR (carriage return) and 
LF (line feed). The accepted commands are:

The nnnn values are 0000-FFFF and correspond in order to the data 
displayed on both the graph and bar graphs as follows: X/A, Y/B, Z/C, W/D. 

The nnnn values are 0000-FFFF and correspond in order to the data 
displayed the graphing component as follows: X, Y, Z, W.

The nnnn values are 0000-FFFF and correspond in order to the data 
displayed on the bar graph component as follows: A, B, C, D.

The following microcontroller applications are designed to run on the JM 
processors. 

The function of the Logic Analyzer Application is to play a different tone and 
illuminate a different LED for each of the buttons pressed on the DEMOJM 
board. The potentiometer controls the intensity of an LED on the DEMOJM 
board, via a PWM signal. 

This microcontroller application samples the state of the on-board three-axis 
accelerometer using on-chip A/D converter channels. This data is converted 
into ASCII characters and sent out using the serial pins of the JM processor. 
These serial pins may be connected to P&E’s virtual serial port (which is part 
of the Embedded Multilink design). Jumper J4 controls this connection. 

P&E has two PC-based P&E Embedded Multilink Toolkit applications which 
allow the serial port data generated by this application to be graphed. These 
are documented in Section 6.4 - Accelerometer Demo Application and 
Section 6.5 - Serial Grapher Application.