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PIC -3. This Class: Introduction to Autonomous Microboard. Next class - hosted mode. This class is overview of autonomous mode. Most projects expected to use some form of autonomous mode…. What is Autonomous Mode?. Assembly/Machine or C programming. C2C (shareware) & CCS

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Pic 3

PIC -3


This class introduction to autonomous microboard

This Class: Introduction to Autonomous Microboard

  • Next class - hosted mode.

  • This class is overview of autonomous mode.

  • Most projects expected to use some form of autonomous mode….


What is autonomous mode

What is Autonomous Mode?

  • Assembly/Machine or C programming.

  • C2C (shareware) & CCS

  • Simple instructions.

  • Full capability of PIC.


When to be autonomous

When to be Autonomous

  • Response in usec.

  • Need full capabilities of PIC.

  • Not too computing or data intensive.

  • No interface to host needed.

  • Low duty cycle (e.g. data logging)


The 87x pic

The 87x PIC

  • Data sheet on website

  • RISC (35 inst.)

  • Fast &Cheap

  • EEPROM, Flash, RAM

  • Programmable

  • In-Circuit Pgming


873 versatile

873 - Versatile

  • DIO (A,B,C)

  • PWM output

  • PWM capture

  • 10 bit ADC

  • SPI

  • I2C

  • Sleep mode

  • Power management

    (uA to mA !)

  • Timers

  • Interrupts

  • UART

  • Parallel port


Instruction set

Instruction Set

  • Simple

  • Portable skill

  • Program from Sheet

    (“Fortran”)

  • Bit intensive

  • 4k 14 bit words

  • 1 us/instruction


Bit banging

Bit Banging

  • Complete data sheet.

  • Many application notes, books.

  • Can code many operations yourself.

  • Many placed in “Modules”

  • UART

  • SPI

  • I2C

  • USB (devel.)


Assembler programming

Assembler Programming

  • Perhaps alien - but powerful and fast.

  • From Section 9.1 in manual:


Modules and debug

Modules and Debug

  • Many modules on PIC

  • Much setup & many modes

  • Most common modules covered by subroutines in Debug (e.g. hosted mode)


Hacking debug

Hacking Debug

  • Definitions

  • Parser

  • Command Sub.

  • Low-Level Sub.


Calling a debug subroutine

Calling a Debug Subroutine

  • Section 11.1

  • Banks for Data

  • Pages for Program

  • Simple!


Programming mplab

Programming - MPLAB

  • Section 9

  • Assembler

  • Simulator

  • Programmer

  • Freeware

    (Also GNU, C2C etc)


Simulating mplab

Simulating - MPLAB

  • Section 10

  • Step through program

  • Watch memory/ports change.

  • Perfect for tracking bugs.

  • Limitations: Serial/ADC


Free c compilers c2c

C2C

On web

LCD etc. interface routines available

Easy to adapt and develop.

Allows inline ASM.

No floats

Not ANSI

Careful with different devices such as LCDs

Will need to read data sheets.

Configurable to most PICs

No examples yet…

Free C Compilers : C2C


Free c compilers optama

Optama

Demo available on web.

LCD etc. interface routines available?

Easy to adapt and develop.

Allows inline ASM?

No floats?

Not ANSI?

Careful with different devices such as LCDs

Will need to read data sheets.

Configurable to most PICs

USB example…

Free C Compilers : Optama


C compilers hitech

HiTech Demo

21day from web

LCD etc. interface routines available.

Easy to adapt and develop.

Allows inline ASM.

Full floating point!

ANSI

Careful with different devices such as LCDs

Will need to read data sheets.

Configurable to all PICs?

No examples yet…

Reinstall system after 21d!

C Compilers : HiTech


C compilers ccs

CCS

Purchased (145$)

LCD etc. interface routines available.

Easy to adapt and develop.

Allows inline ASM.

Full floating point!

ANSI

Careful with different devices such as LCDs

Will need to read data sheets.

Configurable to all PICs

Some examples in 401

Now in my lab…

C Compilers : CCS


Ccs in my lab

Souped up Microboard:

20 MHz 877 PIC

C far faster & easier

LCD, Serial, SPI, ADC, DIO, Steppers, Servos, DAC, Interrupts

“Real Time OS”

‘Bomb’ detectors

Ion thrusters

Robotic fingers

Temperature controllers

DNA detectors

Soon:

Mutation detectors

Launch…

CCS in My Lab


Ccs coding lcd floats

CCS Coding : LCD & Floats

#device PIC16F877 *=16 ICD=TRUE

#include <defs_877.h>

#include <lcd_out.h>

void main(void){ ... lcd_init(); q = 0;

while(1) { ...

lcd_clr_line(1); // advance to line 1

printf(lcd_char, " Hello World ");

T_F = 76.6 + 0.015 * ((float) (q));

lcd_clr_line(2);

printf(lcd_char, "T_F = %f", T_F);

Not Bad Eh?


Other examples

Telephone Dialing

Temperature

Pressure

SPI devices

I2C devices

EEPROM

Control

Music Playing

Floating point

…Countless

HiTech site

CCS site

Internet as a whole

C far more portable

Other Examples


Ccs in ee401

Windows version

Integrated into MPLAB!

Perfect for simulating, debugging and burning…

Limited access?

Linux version

Remote compiles!

Perfect for debugging from home or?

Unlimited access?

CCS in EE401


Other thoughts

Many methods for using bootloaders with asm or C! (e.g. HiTech site)

Power management (e.g. data logging)

USB C code now on web

Some new RF units (simple and readily available components)

Other Thoughts


By end of week

By End of Week

  • Sketch Proposal

    (Friday September 20, 5pm)

  • Parts.

  • Schematic.

  • Objectives.

  • Description/Background

  • Attribute.

  • See website checklist!


Next 2 weeks

Next 2 Weeks

  • Prototyping on SK-10s

  • Return of Proposals

  • Complete Schematic (EAGLE)

  • Programming/Interfacing Signoff

  • Easy if keep underway.


Guest lectures later

Jerry Kowalyk

Library & Electronic searches

Background required in any project report.

Loren Wyard-Scott

PC Layout.

Use of EAGLE.

Instruction on getting a good PCB layout.

Rules for PCB submission.

Guest Lectures Later


Lectures

Loren Wyard-Scott

Simulation

Tracking bugs

Methods

Limitations

Examples

Lectures


Schedule

Easy schedule if regular.

Don’t let due dates loom!

Do not underestimate times for:

- design

- parts

- fixes

- software

- integration

- background

- creativity

Schedule


The labs

The Labs

  • Office hours are generally in lab.

  • Generally in each lab day.

  • Approach in lab or after class.

  • Arrange time if need be.


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