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C24x PWM

3-16

3C24x PWM

Purpose Generate code that configures the event manager (EV) modules to generate

PWM waveforms

Library c2400dspchiplib in Embedded Target for TI C2000 DSP

Description LF2407 DSPs include a suite of pulse width modulators (PWM) used to

generate various signals. This block provides options to set the A or B module

event managers to generate the waveforms you require. The twelve PWMs are

configured in six pairs, with three pairs in each module.

Module — Specifies which target PWM pairs to use:

•

A — Displays the PWMs in module A (PWM1/PWM2, PWM3/PWM4, and

PWM5/PWM6)

•

B — Displays the PWMs in module B (PWM7/PWM8, PWM9/PWM10, and

PWM11/PWM12)

Note PWMs in module A use the Event Manager A, Timer 1, and PWMs in

module B use Event Manager B, Timer 3. You should make sure that the

TimerClock selected in the Scheduling section of the LF2407 eZdsp Target

Preferences block does not conflict with the timers used for the PWMs.

Waveform period source — Source from which the waveform period value is

obtained. Select

Specify via dialog to enter the value in Waveform period or

select

Input port to use a value from the input port.

Waveform period — Period of the timer used to generate PWM waveform

measured in clock cycles. The relationship betwen the timer period and the

waveform period depends on the

Waveform type.

Note Clock cycles refers to the system CPU clock on the LF2407 chip. This

clock is 40 MHz.

Waveform type — Type of waveform to be generated by the PWM pair. The

LF2407 PWMs can generate two types of waveforms:

Asymmetric and

C24x PWM

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 111 112

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MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Podręcznik Użytkownika Strona 58