Trigxsel Trigger Options - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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Analog-to-Digital Converter (ADC)

When configured as such, four conversions of ADCINA1 will be started in series on an ePWM3 SOCA

event with the resulting values stored in the ADCRESULT0 – ADCRESULT3 registers.

Another application may require 3 different signals to be sampled from the same trigger. This can be done

by simply changing the CHSEL field for SOC0-SOC2 while leaving the TRIGSEL field and TRIG1SEL

ADCSOC0CTL = 2846h;

ADCSOC1CTL = 2886h;

ADCSOC2CTL = 28C6h;

TRIG1SEL = 000Bh

When configured this way, three conversions will be started in series on an ePWM3 SOCA event. The

result of the conversion on channel ADCINA1 will show up in ADCRESULT0. The result of the conversion

on channel ADCINA2 will show up in ADCRESULT1. The result of the conversion on channel ADCINA3

will show up in ADCRESULT2. The channel converted and the trigger have no bearing on where the result

of the conversion shows up. The RESULT register is associated with the SOC.

NOTE: These examples are incomplete. Clocks must be enabled and the ADC must be powered to

work correctly. See

clocks. For the power up sequence of the ADC, see

shows the configuration options for the TRIGxSEL registers.

TRIGxSEL Bits

Analog Subsystem

Section 10.5

for more details on how to configure Analog Subsystem

Table 10-2. TRIGxSEL Trigger Options

Trigger Source

No Trigger Enabled (Default)

// (ACQPS=6, CHSEL=1, TRIGSEL=5)

// (ACQPS=6, CHSEL=2, TRIGSEL=5)

// (ACQPS=6, CHSEL=3, TRIGSEL=5)

// (TRIG1SEL=11)

C28 GPIO MUX

SPRUH22I – April 2012 – Revised November 2019

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