2014 ii c08t-sbc pic para ecg
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This document discusses Microchip PIC microcontrollers and their use in an electrocardiogram (ECG) device. It covers the internal architecture of PIC microcontrollers including memory organization, registers, oscillators, and analog-to-digital converters. Diagrams and examples are provided to explain how PIC microcontrollers function and can be programmed to acquire, process, and transmit ECG signal data.
2014 ii c08t-sbc pic para ecg
- 1. Page 1 Universidad de Huánuco Facultad de Ingeniería de Sistemas e Informática
- 2. Page 2 Agenda •Base del Conocimiento –Diagramas de Bode –Diseño de Filtros Analógicos –Diseño de un Electrocardiograma –Microcontrolador PIC con Labview •Motor de Inferencia –Técnicas de Diagnóstico de un ECG •Medios de Comunicación –Prototipo de un ECG
- 3. Page 3 Acerca del ECG-UDH
- 4. Page 4 Modelando un PIC PIC Procesador Memoria Temporizador ADC USB GLCD Oscilador
- 5. Page 5 Modelando un PIC Input Variables Output (User Interface) Variables (Link to other Systems) Embedded Computer Software Hardware Signal Conditioning Data Conversion Output Drive (display, keypad etc.)
- 6. Page 6 Microcontrolador PIC •Como sabemos los micro controladores de 8 bits de Microchip se dividen en 3 gamas: –PIC10 y PIC12: Gama baja –PIC16: Gama media –PIC18: Gama alta
- 7. Page 7 Estructura Interna de un PIC
- 8. Page 8 Estructura Externa de un PIC
- 9. Page 9 Organización de las Memorias de un PIC a) Enfoque de Von Neumann b) Enfoque de Harvard Data Memory Program Memory Address Data Central Processing Unit (CPU) Input/ Output Central Processing Unit (CPU) Data Memory Input/ Output Program Memory Address Data Address Data Address Data
- 10. Page 10 Arquitectura RISC-PIC A CISC machine is generally recognised by: • Many instructions (say over one hundred), some with considerable sophistication; • Instruction words are of different length; • Instructions take different lengths of time to execute. A RISC machine is generally recognised by: • Few instructions (say well below one hundred), • Each performs a very simple action; • All instructions are single word; • All, or almost all instructions take the same length of time to execute. Digital Program I/0 Microprocessor Data Memory Memory Core Analog I/0 & Timers Counters Reset Power Clock Address Buses Internal Data & Further Peripheral Further Peripheral Interrupt(s) A microcontroller = microprocessor core + memory + peripherals
- 11. Page 11 Diagrama de Bloques del PIC The CPU Address for Program Memory Data from Program Memory, carrying instruction word Address for Data Memory Data bus for Data Memory and peripherals Program Memory Data Memory Extra “non- volatile” Data Memory Counter/Timer Peripheral Digital Input/ Output Ports It is easy to see the Program memory, which uses Flash memory technology. Alongside this comes the Stack, which we meet later. Microchip call the main data memory “File Registers”. There is another section of data memory which uses EEPROM technology.
- 12. Page 12 Registro de Estado de un PIC Condition Code Flags
- 13. Page 13 Memoria de Programa y Stack Program Counter 16 Series instructions which invoke the Stack Unimplemented memory space, still addressable by the 13-bit 16F84A program address bus. Program Counter points to locations in program memory The program must start here The Interrupt Service Routine must start here
- 14. Page 14 Mapa de Memoria de Datos y (SFR) Registro de Funciones Especiales msb is “bank select bit” (Status register). These are the Special Function Registers, which allow the CPU to interact with the peripherals General purpose memory
- 15. Page 15 Interface con Periféricos vía el Registro de Funciones Especiales Control SFR(s) Peripheral Data Transfer SFR(s) Microcontroller Core "Outside World" Interrupt(s) Microcontroller Interaction with its Peripherals, via Special Function Register (SFR) and Interrupt microcontroller peripherals can be configured in software to operate in a number of different modes, to do this certain control data must be sent to them to set them up in the desired way once in use, there will be data flow between core and peripheral, there may still be need for further control data, these needs are commonly met by means of dedicated, memory - mapped registers, sometimes called Special Function Registers, this approach gives the microcontroller manufacturer great flexibility to extend a microcontroller family – SFRs for new peripherals can easily be located in gaps in the memory map.
- 16. Page 16 Configuraciones Globales del PIC The configuration word determines certain operating features of the microcontroller. It is in program memory, but cannot be accessed in normal operation. It is written to during the programming process. You set its value either by response to a dialogue box in MPLAB, or by use of Assembler Directives, at the head of your programme. The 16F84A Configuration Word
- 17. Page 17 Tipos de Memorias de un PIC
- 18. Page 18 Características de los Osciladores Oscilador Primario Oscilador Secundario Oscilador Interno Frecuencias de Oscilación Altas (XT, HS) Frecuencias de Oscilación Medias (LP) Frecuencias de Oscilación Bajas (RC) Con PLL Sin PLL Con Pre Escala Sin Pre Escala Con Pre Escala Sin Pre Escala Multiplica Frecuencia de Oscilación Divide Frecuencia de Oscilación Divide Frecuencia de Oscilación
- 19. Page 19 Modos del Oscilador The 16F84A can be configured to operate in four different oscillator modes, using R-C, crystal or ceramic oscillators. It can also accept an external clock source. The user selects which mode is to be used by setting bits in the Configuration Word. XT – Crystal The standard crystal configuration, intended for crystals or ceramics in the range 1MHz to 4MHz. HS – High Speed A higher drive version of the XT configuration, for higher frequency crystals and ceramic resonators. Intended for frequencies in the region of 4MHz or greater. It leads to the highest current consumption of all the oscillator modes. LP – Low Power Intended for low frequency crystal applications, and gives the lowest power consumption possible. Will however operate at any frequency below around 200kHz. RC - Resistor-Capacitor Requires connection of an external resistor and capacitor. The lowest cost way of getting an oscillator, but should not be used when any timing accuracy is required.
- 20. Page 20 Modos del Oscilador b) Resistor-Capacitor c) Externally Supplied Clock a) Crystal or Ceramic, HS, XT, or LP RA2 RA3 RA4/T0CKI MCLR V RB0/INT RB1 RB2 RB3 RB4 RB5 RB6 RB7 RA1 RA0 OSC1/CLKIN OSC2/CLKOUT SS VDD Supply voltage Oscillator connections Port A, Bit 0 Port A, Bit 2 Port A, Bit 1 Port A, Bit 3 *Port A, Bit 4 Ground **Port B, Bit 0 Port B, Bit 1 Port B, Bit 2 Port B, Bit 3 Port B, Bit 7 Port B, Bit 6 Port B, Bit 5 Port B, Bit 4 *also Counter/Timer clock input **also external Interrupt input Reset 1 9 10 18 The Oscillator Pins
- 21. Page 21 Diagramas de un Oscilador Primario
- 22. Page 22 Acerca del Conversor Analógico a Digital ADC del PIC
- 23. Page 23 Acerca del ADC del PIC
- 24. Page 24 Agenda •Base del Conocimiento –Diagramas de Bode –Diseño de Filtros Analógicos –Diseño de un Electrocardiograma –Microcontrolador PIC con Labview •Motor de Inferencia –Técnicas de Diagnóstico de un ECG •Medios de Comunicación –Prototipo de un ECG ADC
- 25. Page 25 Acerca del ECG-UDH
- 26. Page 26 Características ADC del DSPIC •Conversión vía aproximación sucesiva SAR. •Velocidad de conversión de hasta 500 ksps. •Hasta 16 pines de entrada analógica. •Pines de referencia de Voltaje Externo. •Modo Automático de Escaneo de Canal . •Fuente seleccionable de activación de conversión. •Buffer de resultado de conversión de 16 word •Modos seleccionables de llenado de Buffers. •Cuatro opciones de alineamiento de resultado. •Modos de operación durante el estado Sleep e Idle.
- 27. Page 27 Acerca del ADC del PIC
- 28. Page 28 Flujo grama de operación del ADC
- 29. Page 29 Estructura Módulo A/D del PIC24F VREF+ VREF- A/D converter Conversion Control Bus Interface Data Format Sample Sequence Control AN0 AN1 S/H AN15 CH0 8/16 Level Results Buffer VR+ VR- VR Select AVDD AVSS
- 30. Page 30 Eje y: Tiempo de Conversión A/D = Tiempo de Adquisición más Conversión Tiempo de Adquisición Tiempo de Conversión Inicio del Tiempo de Adquisición Fin de Conversión Entrada Analógica Tiempo de Conversión A/D Clock A/D TAD
- 31. Page 31 Registro de Control ADC
- 32. Page 32 Eje x: Tiempo de Muestreo AD1CON3<ADCS7:ADCS0> TCY to 256*TCY RCAD FCY = FOSC/2 TAD AD1CON3<ADRC> 1 0 AD Clock Postscaler † by 1 to 256
- 33. Page 33 Proceso de Operación del ADC
- 34. Page 34 Configuración del Clock del ADC
- 35. Page 35 Aspectos de Precisión Digital
- 36. Page 36 Diagrama de Bloques del ADC 10bits AVDD AVSS VREF+ VREF- VR+ VR- VR Select AD1CON2<VCFG2:VCFG0> AVSS AVDD 1xx VREF- VREF+ 011 VREF- AVDD 010 AVSS VREF+ 001 AVSS AVDD 000 VR- VR+ VCFG2:VCFG0 AD1CON2 Register bit15 CSSL13=0 CSSL14=0 CSSL15=0 BUFM bit0 ALTS CSNA VCFG2 VCFG1 VCFG0 bit8 SMPI1 SMPI 0 SMPI3 SMPI2 BUFS bit7 --- --- --- --- ---
- 37. Page 37 Diagrama de Bloques del ADC 10bits AN0 AN1 AN15 Mux A VR- AN1 AD1CHS<CH0SA3:CH0SA0> AD1CHS<CH0NA> VINH VINL (0) (1) AD1PCFG Register bit15 CSSL10=0 CSSL13=0 CSSL14=0 CSSL8=0 PCFG1 bit0 PCFG0 PCFG2 PCFG15 PCFG14 PCFG13 ………… bit8 AD1CON2 Register bit15 CSSL13=0 CSSL14=0 BUFM bit0 ALTS CSNA VCFG2 VCFG1 VCFG0 SMPI1 SMPI 0 SMPI3 SMPI2 BUFS bit7 --- --- --- --- --- bit8 AD1CHS Register bit15 CH0SA1 bit0 CH0SA0 CH0SA2 CH0NA bit7 CH0SA3 CH0SB1 CH0SB0 CH0SB2 CH0NB CH0SB3 --- --- --- --- --- --- AD1CSSL Register bit15 CSSL13=0 CSSL14=0 CSSL1 bit0 CSSL0 CSSL2 CSSL15 CSSL14 CSSL13 …………
- 38. Page 38 Escaneo de Canales del ADC ADCBUF Buffer + - CH 0 AN15 AN14 …. AN5 AN4 AN3 AN2 AN1 AN0 +B - B +A - A VREF- AN1 AN0 AN2 AN13 AN14 INT ADCBUF0 AD1CSSL Register bit15 CSSL13=0 CSSL14=0 CSSL1 bit0 CSSL0 CSSL2 CSSL15 CSSL14 CSSL13 AN13 ………… bit8 AD1CON2 Register bit15 CSSL13=0 CSSL14=0 BUFM bit0 ALTS CSNA VCFG2 VCFG1 VCFG0 SMPI1 SMPI 0 SMPI3 SMPI2 BUFS bit7 --- --- --- --- ---
- 39. Page 39 Diagrama de Bloques del ADC 10 bits VINH VINL S/H Mux A Mux B AD1CON1<ASAM> AD1CON1<SAMP> Señal de Conversion completa 0 1 bit8 AD1CON2 Register bit15 CSSL13=0 BUFM bit0 ALTS CSNA VCFG2 VCFG1 VCFG0 SMPI1 SMPI 0 SMPI3 SMPI2 BUFS bit7 --- --- --- --- ---
- 40. Page 40 Diagrama de Bloques del ADC 10 bits VINH VINL S/ H AD1CON1<ASAM> AD1CON1<SAMP> Conversion complete Signal ADC1BUF0 : ADC1BUF15 RESULT VR+ VR- AD1CON1<DONE> AD1CON3<SAMC4:SAMC0> (7) 0 TAD to 31 TAD AD1CON1 <SSRC2:SSRC0> Clearing AD1CON1<SAMP> (0) Active Transition on INT0 pin (1) Timer4 Compare ends (2) Evitar 0 TAD A/D converter VR- VR+
- 41. Page 41 Diagrama de Bloques del ADC 10 bits 0000 00dd dddd dddd ssss sssd dddd dddd dddd dddd dd00 0000 sddd dddd dd00 0000 RESULT FORMAT AD1CON1<FORM1:FORM0> AD1CON2<BUFM> = „0‟ AD1CON2<BUFS> AD1CON2<SMPI3:SMPI0> ADC1BUF0 : : : : : : ADC1BUF15 AD1CON2<BUFM> = „1‟ ADC1BUF0 : : ADC1BUF7 ADC1BUF8 : : ADC1BUF15 0 1
- 42. Page 42 Ejercicio N1: Digitalizar la Señal Analógica ECG •Tareas a realizar: –Programar el PIC con MPLAB en C18. –Realizar la conversión digital de una señal analógica en Proteus con PIC usando Potenciómetro. •Resultado esperado: –Digitalización de una señal analógica y su visualización usando LCD.
- 43. Page 43 Objetivos del Laboratorio •Configurar el ADC •Configurar los puertos de E/S •Leer el ADC y mostrarlos en LEDs VDD Vss PIC24 AN5 POT R6 RA7-RA0 LEDs D10-D3
- 44. Page 44 Pasos a Realizar •Open the project –C:RTC203_PRCLab5Lab5.mcp •Open the file –C:RTC203_PRCLab5Lab5.c •Look for ADCInit() function and configure ADC by initializing the registers AD1CON1, AD1CON2, and AD1CON3 looking into the Register details on the next few pages. –STEP 1: AD1CON1 •Select Integer Format Result •Auto Conversion Start •Sample after conversion –STEP 2: AD1CON2 •Select AVDD and AVSS as references •Disable Scan mode •Interrupt at 16th sample/Convert sequence •16*1 level buffer •Always use Mux A –STEP 3: AD1CON3 •Select Sample Time = 13TAD •Conversion Time is always 12TAD •Select AD Clock Source such that you get 16 samples in around 1 mSec (16 ksps) •Assume 1TCY =.25 uS (FCY = 4 MHz)
- 45. Page 45 Pasos a Realizar •Continue to configure ADC by initializing the registers AD1CHS, AD1PCFG, and AD1CSSL looking into the Register details on the next few pages. STEP 4: AD1CHS Set the positive sample input channel for MUX A to use AN5 Set the negative input channel for MUX A to use VR- STEP 5: AD1PCFG Set AD1PCFG so that the only pin using analog functionality is AN5 STEP 6: AD1CSSL Channel scanning is not enabled, so no input channels should be selected for scanning •Build the project and program the device •Procedure to Test –Vary the POT and observe LEDs
- 46. Page 46 Configurando el Registro ADC AD1CON1: A/D CONTROL REGISTER 1 ADON -- ADSIL -- -- -- FORM1 FORM0 Bit:8 Bit:15 ADC Module enable bit ADC Module enable/disable in IDLE mode Result Format 00: Intiger (0000 00dd dddd dddd) 01: Signed Intiger (ssss sssd dddd dddd) 10: Fractional (dddd dddd dd00 0000) 11: Signed Fractional (sddd dddd dd00 0000) SSRC2 SSRC1 SSRC0 -- -- ASAM SAMP DONE Start Sampling, If ASAM is „0‟ Conversion Status bit Bit:0 Bit:7 Conversion Trigger Source Selection Bits 000: Manual Conversion Trigger 001: Active transition on INT0 pin triggers conversion 010: Timer3 compare triggers conversion 111: Auto conversion Auto Sample Selection bit 1: Sample immediately after completion of last conversion. 0: Sample on setting of „SAMP‟
- 47. Page 47 Configurando el Registro AD1CON2 VCFG2:VCFG0 VR+ VR- 000 AVDD AVSS 001 VREF+ AVSS 010 AVDD VREF- 011 VREF+ VREF- 1xx AVDD AVSS VCFG2 VCFG2 VCFG0 -- -- CSCNA -- -- BUFS -- SMPI3 SMPI2 SMPI1 SMPI0 BUFM ALTS VR Select AVDD AVSS VREF+ VREF- VR+ VR- VCFG2:VCFG0 Bit:8 Bit:15 Scan CH0 Mux A Input Bit:0 Bit:7 SMPI3:SMPI0 Interrupt Event (Sample/convert sequence) 0000 each 0001 alternate .... …. 1110 Every 15th 1111 Every 16th Buffer Status bit, is valid only when BUFM = „1‟ 1: Buffer 8-F is being filled, can access Buffer 0-7 0: Buffer 0-7 is being filled, can access Buffer 8-F Buffer Mode Select bit 1: Buffer configured as two 8-words buffers 0: Buffer configured as one 16-words buffers Sample alternatively MUX-A & MUX-B
- 48. Page 48 Configurando el Registro AD1CON3 SAMC4:SAMC0 Sampling Time 00000 0 TAD 00001 1 TAD .... …. 11110 30 TAD 11111 31 TAD ADRC -- -- SAMC4 SAMC3 SAMC2 SAMC1 SAMC0 ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0 ADCS7:ADCS0 Conversion Clock 00000000 TCY ( FCY ) 00000001 2*TCY ( FCY / 2 ) .... …. 11111110 255*TCY ( FCY / 255 ) 11111111 256*TCY ( FCY / 256 ) Bit:8 Bit:15 A/D conversion Clock Source 1: ADRC is used 0: System clock is used Bit:0 Bit:7 A/D Sample Time Selection bits A/D Conversion Clock Selection bits ADCS = (TAD/TCY) - 1
- 49. Page 49 Configurando el Registro AD1CHS CH0SB3:CH0SB0 CH0 Positive Input for MUX B 0000 AN0 0001 AN1 .... …. 1110 AN14 1111 AN15 CH0NB -- -- -- CH0SB3 CH0SB2 CH0SB1 CH0SB0 Bit:8 Bit:15 CH0 Negative input for MUX A 1: AN1 0: VR- CH0NA -- -- -- CH0SA3 CH0SA2 CH0SA1 CH0SA0 Bit:0 Bit:7 CH0SA3:CH0SA0 CH0 Positive Input for MUX A 0000 AN0 0001 AN1 .... …. 1110 AN14 1111 AN15 CH0 Negative input for MUX B 1: AN1 0: VR- VREF- AN15 AN0 ANxx +B - B + A - A AN15 AN0 ANxx VREF- AN1 + - CH 0 AN1 CH0SB3:CH0SB0 CH0SA3:CH0SA0 CH0NB CH0NA
- 50. Page 50 Configurando el AD1PCFG: Registro de Configuración de Puertos PCFG15 PCFG14 PCFG13 PCFG12 PCFG11 PCFG10 PCFG9 PCFG8 Bit:8 Bit:15 Bit:0 Bit:7 PCFG7 PCFG6 PCFG5 PCFG4 PCFG3 PCFG2 PCFG1 PCFG0 Analog Input Pin Configuration Control bits 0 to 15 1: Pin for corresponding analog channel (ANxx) is in digital mode 0: Pin for corresponding analog channel (ANxx) is in analog mode AD1CSSL : A/D Input Scan Select Regsiter CSSL15 CSSL14 CSSL13 CSSL12 CSSL11 CSSL10 CSSL9 CSSL8 Bit:8 Bit:15 Bit:0 Bit:7 CSSL7 CSSL6 CSSL5 CSSL4 CSSL3 CSSL2 CSSL1 CSSL0 A/D Input Channel Scan Selection bits 0 to 15 1: Corresponding analog channel (ANxx) is selected for sequential scanning 0: Corresponding analog channel (ANxx) is ignored for sequential scanning
- 51. Page 51 Resultado Esperado •El valor del POT es promediado cada 16 muestras en 1 ms. •El valor del POT es mostrado en los LEDs como un valor binario desde 0 hasta 255 •El Pin RB2 cambia de valor cada 16 muestras (con una frecuencia de 500 Hz)
- 52. Page 52 Agenda •Base del Conocimiento –Diagramas de Bode –Diseño de Filtros Analógicos –Diseño de un Electrocardiograma –Microcontrolador PIC con Labview •Motor de Inferencia –Técnicas de Diagnóstico de un ECG •Medios de Comunicación –Prototipo de un ECG USB
- 53. Page 53 Acerca del ECG-UDH
- 54. Page 54 Interfaces USB USB • Creado por Intel en el año 1994, versión 1.0. • En el año 1998 se lanza la versión 1.1 con una velocidad de transferencia baja de 1.5 Mbps y a full capacidad de 12 Mbps. • En el año 2000, se lanza la versión 2.0 de alta capacidad con 480 Mbps.
- 55. Page 55 USB: Bus Serial Universal • Auto détección & configuraóion (Plug&Play) • Energía en el Bus • 3 velocidades: Low- 1.5 Mbps, Full- 12 Mbps, High- 480 Megabits/second RS232 Paralelo PS/2 Tipos de Aplicación Extend the functionality of your computer! Data Analysis, Data Logging, Firmware Updates, Diagnostics, Embedded Applications!
- 56. Page 56 Características del USB NRZI Data Encoding Half duplex – data transmission can go in only one direction at a time Bus Power to each device: 4.40 - 5.25 V Guaranteed 100 mA 500 mA maximum through negotiation ~ 5.0 V ~ 3.3 V VBUS D+ D- GND VBUS D+ D- GND 4-wire connection Differential Signaling
- 57. Page 57 Características del USB “mini-B” Plug FS, HS Peripheral “B” Plug FS, HS Peripheral “A” Plug USB Host
- 58. Page 58 Características del USB Guaranteed Latency Guaranteed Data Integrity Interrupt Bulk Isochronous PIC18F4550 family supports all these transfer types.
- 59. Page 59 USB Pipes HOST PC Big USB Pipe 12Mb/s Small Pipe to each USB device (up to 127) Tiny Pipes (endpoints)
- 60. Page 60 Client Software <-> Function Client Software Interface USB Device Host Endpoints Data Flows Buffers Pipes
- 61. Page 61 El Dispositivo Lógico Device (Manufacturer: Microchip Technology) (Product: Mouse in a Circle Demo) Configuration Interface IN (Endpoint 0) USB System Software (default control pipes) USB Device-Specific Pipe(s) (Human Interface Device) HID TX/RX Functions (MCHPFSUSB FW) Analog/Digital I/O OUT (Endpoint 0) IN (Endpoint x) OUT (Endpoint x) These settings are represented by a Device Descriptor Table, stored in firmware.
- 62. Page 62 Trama USB BULK BULK BULK BULK BULK BULK BULK BULK Tx Voice Tx Line Interrupt, Control, Low Speed Trame = 1ms Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Stereo Audio Rx Voice Rx Line Slot SOF Low Speed Low Speed BULK BULK Scanner
- 63. Page 63 Periféricos USB 63 Joystick Mouse SD Card Reader MCHP RS-232 Data UPS Logger Keyboar d Generic Human Interface Device Class (HID) Mass Storage Device Class (MSD) Communication Device Class (CDC) Digitizer LibUSB WinUSB Custom Class (Vendor Class) Audio Class MIDI Speaker
- 64. Page 64 El Proceso de Enumeración DETACHED POWERED Power (self/bus) DEFAULT Bus reset ADDRESS Get Device Descriptor CONFIGURED Get Descriptors ATTACHED Cable Connected SUSPENDED
- 65. Page 65 Auto Detección: Full Velocidad +5V D+ D-GND Transceiver USB Connector Peripheral Device VUSB 3.3 V Full Speed Identification D+ line pull-up 1.5 k±5% USB PIC® MCU
- 66. Page 66 Auto Detección: Baja Velocidad +5V D+ D-GND Transceiver USB Connector Peripheral Device VUSB 3.3 V Low Speed Identification D- line pull-up 1.5 k±5% USB PIC® MCU
- 67. Page 67 On-chip Pull-up Resistors +5V D+ D-GND Transceiver USB Connector Peripheral Device VUSB 3.3 V On-chip pull-up resistors available! USB PIC® MCU
- 68. Page 68 Address and Configuration: EP0 See Chapter 9 in USB 2.0 Spec for more info. Other Endpoints Endpoint 0 IN (Control Data) Endpoint 0 OUT (Control Data) Dual Port/Access RAM Descriptors Control Transfers USB PIC® MCU
- 69. Page 69 Descriptores Device Configuration 1 Interface 0 Endpoint Interface 1 Endpoint Endpoint Endpoint To other Configurations if any To other Interfaces if any String 0 String 1 String N Descriptors are typically stored in non-volatile/Flash memory
- 70. Page 70 Ejemplo de Descriptores PICDEM™ USB Microchip Device Configuration 1 Interface 0 Endpoint Manu. String Prod. String USB 2.0, VID = 0x04D8, PID = 0x0007, Num. Configurations, Strings? Configuration #1: Bus-Powered, Remote Wakeup, 500mA, Num. Interfaces Interface #0: HID Class, Num. Endpoints Endpoint 1 IN, Interrupt Transfer Type, 64-byte buffer, Poll every 3 ms Unicode Characters Go USB! Other String
- 71. Page 71 MCHPFSUSB Software Framework - Device Descriptor Table - usb_descriptors.c Descriptors VID & PID Class Specific /* Device Descriptor */ ROM USB_DEVICE_DESCRIPTOR device_dsc= { 0x12, // Size of this descriptor in bytes USB_DESCRIPTOR_DEVICE, // DEVICE descriptor type 0x0200, // USB Spec Release Number CDC_DEVICE, // Class Code 0x00, // Subclass code 0x00, // Protocol code EP0_BUFF_SIZE, // Max packet size for EP0, 0x04D8, // Microchip Vendor ID 0x000C, // Product ID ID …
- 72. Page 72 CDC – RS-232 Emulation PC Computer PIC® Microcontroller USB Cable Hyper Terminal CDC INF File Required (Supplied in MCHPSUSB) Standard Windows Drivers Design Considerations: •~80 KB/s max •Bulk Transfers •PC applications can access the device as though it is connected to a serial COM port
- 73. Page 73 MCHPFSUSB Framework - Polled Program Flow - Reset main() InitializeSystem() while(1) Your application code USBDeviceTasks() ProcessIO() USB Stack Cooperative Multitasking!! No blocking functions. Use state machine. You edit UserInit() Function Services CDCTxService() MSDTasks() Re-arm OUT Endpoint (HID & Generic)
- 74. Page 74 MCHPFSUSB Framework - Interrupt Program Flow - Reset main() InitializeSystem() while(1) Your application code ProcessIO() You edit UserInit() USB Interrupt Context USBDeviceTasks() USBDeviceAttach() Function Services Notifies the stack when the device is attached CDCTxService() MSDTasks() Re-arm OUT Endpoint (HID & Generic)
- 75. Page 75 Código de Ejemplo #include “Compiler.h” #include “USBusb.h” #include “USBusb_function_cdc.h” #include “HardwareProfile.h” void UserInit(void){ … … } void ProcessIO(void){ if((USBDeviceState < CONFIGURED_STATE)||(USBSuspendControl==1)) return; … … CDCTxService(); } static void InitializeSystem(void){ #if define … #endif UserInit(); USBDeviceInit(); } int main(void){ InitializeSystem(); USBDeviceAttach(); while(1){ ProcessIO(); } } Main.c Needed (usb_config.h is called by usb.h) Put your initialization code here Put your application code (state machine) here No need to change Conditional compiling (no need to change) USBDeviceTasks() is executed in an ISR (High Priority PIC18, _USB1Interrupt() PIC24 & PIC32)
- 76. Page 76 Agenda •Base del Conocimiento –Diagramas de Bode –Diseño de Filtros Analógicos –Diseño de un Electrocardiograma –Microcontrolador PIC con Labview •Motor de Inferencia –Técnicas de Diagnóstico de un ECG •Medios de Comunicación –Prototipo de un ECG GLCD
- 77. Page 77 Acerca del ECG-UDH
- 78. Page 78 Pantallas Gráficas LCD (GLCD) RA0/AN02RA1/AN13RA2/AN2/VREF-/CVREF4RA3/AN3/VREF+ 5RA4/T0CKI/C1OUT/RCV6RA5/AN4/SS/LVDIN/C2OUT7RA6/OSC2/CLKO14OSC1/CLKI13RB0/AN12/INT0/FLT0/SDI/SDA33RB1/AN10/INT1/SCK/SCL34RB2/AN8/INT2/VMO35RB3/AN9/CCP2/VPO36RB4/AN11/KBI0/CSSPP37RB5/KBI1/PGM38RB6/KBI2/PGC39RB7/KBI3/PGD40RC0/T1OSO/T1CKI15RC1/T1OSI/CCP2/UOE16RC2/CCP1/P1A17VUSB18RC4/D-/VM23RC5/D+/VP24RC6/TX/CK25RC7/RX/DT/SDO26RD0/SPP019RD1/SPP120RD2/SPP221RD3/SPP322RD4/SPP427RD5/SPP5/P1B28RD6/SPP6/P1C29RD7/SPP7/P1D30RE0/AN5/CK1SPP8RE1/AN6/CK2SPP9RE2/AN7/OESPP10RE3/MCLR/VPP1U2PIC18F4550X1CRYSTALC122pFC222pF12345ICSP 1-5CONN-SIL5MCLRPGDPGCMCLRPGCPGD1234AN 4-3-ECGCONN-H4 CS11CS22GND3VCC4V05RS6R/W7E8DB09DB110DB211DB312DB413DB514DB615DB716RST17-Vout18 LCD2AMPIRE128X64CS1CS2 CS1CS2 DI DI RWERST RWERST 12 3 RV410k 12345 J2CONN-SIL5U2(RC0/T1OSO/T1CKI) R410k1265Pasa U57809C12100nFC13100nFC14100uF16VC15100uF16VC16100nFC17100nFVI1VO3 U77805 VDD V+ V- V+ VCC1D+ 3D- 2GND4J3USBCONN321 DE ALIMENTACION +/- 9V y 5V326 7481 U1OP07V+ 326 7481 U8OP07V- R310kR1410kSUMADOR
- 79. Page 79 Características de los GLCD
- 80. Page 80 Controladores GLCD para Escribir Byte 0xAB
- 81. Page 81 Instrucciones del Controlador GLCD
- 82. Page 82 Diagrama de Bloque del Controlador GLCD
- 83. Page 83 Código del Proyecto ECG
- 84. Page 84 Agenda: UDH Rumbo a la Acreditación Internacional