参数资料
型号: DM300014
厂商: Microchip Technology
文件页数: 36/72页
文件大小: 0K
描述: BOARD DEMO DSPICDEM 1.1 GEN PURP
标准包装: 1
dsPICDEM? 1.1 Development Board User’s Guide
Figure 3-9 shows the frequency response of the FIR filter implemented on the
dsPIC30F. The FIR filter is only employed for demonstrating filter operation.
FIGURE 3-9:
FREQUENCY RESPONSE: FIR FILTER
The signal frequency determined by analyzing the 256-point FFT and associated bin is
displayed on the LCD. Cycle counts for the digital filters and FFT are displayed on the
LCD.
To quit this demonstration and return to the main menu, press switch SW1.
3.3.1.3
DTMF GENERATION MODE
From the Menu Options display, pressing switch SW4 launches the DTMF Generation
demo and takes you to the DTMF operation menu (Figure 3-10).
FIGURE 3-10:
DTMF TONE GENERATION MENU
D TMF T ONE
NEXT
SELECT
–s2
–s3
0123456789
PLAY SEQ
–s4
MAIN
–s1
When this display is active, switches SW2-SW4 control tone generation, as shown in
TABLE 3-2:
Switch
s2
s3
s4
DTMF TONE GENERATION CONTROLS
Function
Moves blinking cursor to the next DTMF Tone digit
Plays the DTMF tone associated with the digit selected by s2
Plays a predetermined sequence of ten DTMF tones
DS70099B-page 32
Advance Information
? 2003 Microchip Technology Inc.
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