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C24x ADC

3-9

3C24x ADC

Purpose Generate code to configure the C24x analog-to-digital converter

c2400dspchiplib in Embedded Target for TI C2000 DSP

Description The C24x ADC block configures the C24x ADC to perform analog-to-digital

conversion of signals connected to the selected ADC input pins. It outputs

digital values representing the analog input signal and stores the converted

values in the result register of your digital signal processor. You use this block

to capture and digitize analog signals from external sources such as signal

generators, frequency generators, or audio devices.

The output of the C24x ADC is a vector of

uint16 values. The output values

are in the range 0 to 1023 because the C24x ADC is 10-bit converter.

The C24x ADC block supports ADC operation in dual-sequence and

cascaded-sequencer modes. In dual-sequencer mode, either

Module A or

Module B can be used for the ADC block, and two ADC blocks are allowed in

the model. In cascaded-sequencer mode, both

Module A and Module B are

used for a single ADC block.

Module — Specifies which DSP module to use

•

A — Displays the ADC channels in module A (ADCINA0 through

ADCINA7)

•

B — Displays the ADC channels in module B (ADCINB0 through

ADCINB7)

•

A and B — Displays the ADC channels in both modules A and B (ADCINA0

through ADCINA7 and ADCINB0 through ADCINB7)

Use the check boxes to select the desired ADC channels.

Sample time — Time in seconds between consecutive sets of samples that are

converted for the selected ADC channel(s). This is the rate at which values are

read from the result registers. See “Scheduling and Timing” on page 1-8 for

additional information on timing.

To set different sample times for different groups of ADC channels, you must

add separate C24x ADC blocks to your model and set the desired sample times

for each block.

C24x ADC

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MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Podręcznik Użytkownika Strona 51