Detailed description

Detailed description of the HIL TI Launchpad Interface

The board features the following key sections, as shown in Figure 1.

  1. HIL Analog connector
  2. HIL Digital connector
  3. Measurement terminals
  4. PSU selector switches
  5. LaunchPad™ connector group
  6. Monitoring BNC connectors

Figure 1: HIL TI Launchpad Interface layout

HIL Analog Connector

This is a 96 pin DIN 41612/IEC receptacle connector that is directly pluggable into the Analog I/O connector, found on all Typhoon HIL hardware emulators. HIL Analog Connector shows how 20 analog signals (16 analog outputs and 4 analog inputs) from Typhoon HIL emulators are connected to the LaunchPad™ headers.

To protect against overvoltage conditions, HIL Analog Outputs feature series 120Ω RZ1-RZ16 resistors that, together with protection diodes (U2-U5), form a 0-3.3V referenced clamping circuit.

Table 1. Analog signal routing
HIL Analog Output DSP signal
AO1 ADCIN-14

AO2

ADCIN-C3

AO3 ADCIN-B3
AO4 ADCIN-A3
AO5 ADCIN-C2
AO6 ADCIN-B2
AO7 ADCIN-A2
AO8/AI1* ADCIN-A0/DAC-A
AO9 ADCIN–15
AO10 ADCIN-C5
AO11 ADCIN–B5
AO12 ADCIN–A5
AO13 ADCIN–C4
AO14 ADCIN–B4
AO15 ADCIN–A4
AO16/AI2* ADCIN–A1/DAC-B
AI3 PWM-DAC1
AI4 PWM-DAC2
AI5 PWM-DAC3
AI6 PWM-DAC4

* Depending on the position of RDACA or RDACB jumper resistors, this HIL AO or HIL AI may be routed to the DSP analog pin. By default, HIL AOs are routed to the DSP ADC.

Figure 2: RDACA and RDACB default positions

HIL Digital Connector

This is a 96 pin DIN 41612/IEC receptacle connector that is directly pluggable into the Digital connector of the Typhoon HIL emulators, followed by three rows of measurement terminals. Table 2 shows how 32 digital signals (16 outputs and 16 inputs) from Typhoon HIL emulator are routed to the LaunchPad™ headers (LAUNCHXL-F28379D digital stage).

A total of 16 HIL digital outputs are level shifted from the HIL’s 5V to DSP’s 3.3V, using an SN74LVCH16T245 level shifter. Level shifter outputs can be enabled/disabled by resistor jumpers ROE1 (lower 8 outputs) and ROE2 (upper 8 outputs). All outputs are enabled by default as shown in Figure 3.

Table 2. HIL Digital Output signal routing
HIL Digital Output signal DSP Digital Input signal
DO1 GPIO-61
DO2 GPIO-123
DO3 GPIO-122
DO4 GPIO-58
DO5 GPIO-59
DO6 GPIO-124
DO7 GPIO-125
DO8 GPIO-29
DO9 GPIO-66
DO10 GPIO-131
DO11 GPIO-130
DO12 GPIO-63
DO13 GPIO-64
DO14 GPIO-26
DO15 GPIO-27
DO16 GPIO-25
Table 3. HIL Digital Input signal routing
HIL Digital Input signal DSP Digital Input signal
DI1 GPIO-00/PWM-1A
DI2 GPIO-01/PWM-1B
DI3 GPIO-02/PWM-2A
DI4 GPIO-03/PWM-2B
DI5 GPIO-04/PWM-3A
DI6 GPIO-05/PWM-3B
DI7 GPIO-24
DI8 GPIO-16
DI9 GPIO-06/PWM-4A
DI10 GPIO-07/PWM-4B
DI11 GPIO-08/PWM-5A
DI12 GPIO-09/PWM-5B
DI13 GPIO-10/PWM-6A
DI14 GPIO-11/PWM-6B
DI15 GPIO-14/PWM-8A
DI16 GPIO-15/PWM-8B

Figure 3: RDACA and RDACB default positions

LaunchPad™ connector group

The LaunchPad™ connector group comprises of four 2x10 pin headers for TI LaunchPad™ boards, and a set of four 2x10 pin measurement terminals, with a pinout shown in Figure 4.

Figure 4: LaunchPad™ connector group pinout

Note that, while various boards share the same pinout, the HIL TI Launchpad Interface was designed and tested only with the following LaunchPad™ boards in mind:

Power Supply

By default, all LaunchPad™ boards are powered via USB. With the HIL TI Launchpad Interface, these boards can be powered from HIL instead, thus enabling "standalone" operation.

Proceed with caution. Study the official schematic of the LaunchPad™ board carefully before making any changes. Before powering from HIL, disconnect and/or disable all USB power supplies present on the LaunchPad™ board itself, regardless of the USB cable connection.

Power selection is performed via two switches, labelled as "HIL POWER".

Figure 5: HIL POWER switch section location

Figure 6: HIL POWER switch section schematic

Monitoring BNC and measurement terminals

For easier access to the signals from the HIL setup, a total of 10 BNC, and a total of 192 measurement terminal posts are provided on the HIL TI Launchpad Interface.

“Texas Instruments“, “TI“, and "LaunchPad™" are registered trademarks of Texas Instruments Incorporated in the United States of America, or other countries, or both.