Dlp Nirscan Nano Software; Overview; Ti Rtos; Dlp Nirscan Nano Software Architecture - Texas Instruments DLP NIRscan User Manual

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Table Of Contents

Table of Contents

5.1

Overview

The DLP NIRscan Nano's Tiva microprocessor is the system's main control processor. The Tiva handles

button presses, commands and data transfers over USB or Bluetooth, controls the DLP subsystem,

streams the patterns to select specific wavelengths, captures data from InGaAs detector, activates lamps,

and stores data in the microSD card. Due to the realtime nature of the system, the Tiva software includes

TI-RTOS that coordinates tasks while handling realtime interrupts and semaphores. Low-level drivers for

Tiva's USB, GPIO, EPI, I

routines. The Bluetopia Stack handles Bluetooth communications. DLP Spectrum Library handles pattern

generation and data transformation from raw scan data to a wavelength spectrum. A command handler

interprets commands from USB or Bluetooth and starts the tasks needed to execute the commands. The

main application initializes the system and waits for commands from USB and Bluetooth. The overall

software architecture depicting these components is shown in

HID

Protocol

USB

Driver

5.1.1 TI RTOS

TI RTOS is a scalable, real-time operating system that handles scheduling and synchronization of tasks,

interrupts, includes a limited set of drivers, and provides hardware abstraction layer to ease application

software development. The TI RTOS also includes the FAT file system (FATFs) module to store data in

the microSD card. The TI RTOS drivers used by DLP NIRscan Nano are:

•

C: driver used for Tiva communication with DLPC150, TMP006, and HDC100.

•

SDSPI: SPI driver for Tiva communication with SDcard.

•

USBMSCHFatFS: driver for USB mass storage class.

DLPU030B – June 2015 – Revised July 2015

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C, LCD, SPI, and UART peripherals are handled by TivaWare libraries and

Tiva TM4C1297

Main Application

Scan Handler

DLP Spectrum Library

Command Handler

FAT File

TMP006

System

Handler

SDSPI

HDC1000

Driver

Handler

TivaWare (Peripheral Library)

TI RTOS

Figure 5-1. DLP NIRscan Nano Software Architecture

DLPU030B – June 2015 – Revised July 2015