Realizacja systemów wbudowanych (embeded systems) w strukturach PSoC (Programmable System on Chip)

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Piotr Kania
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1 Realizacja systemów wbudowanych (embeded systems) w strukturach PSoC (Programmable System on Chip) Embeded systems Architektura układów PSoC (Cypress) Możliwości bloków cyfrowych i analogowych Narzędzia programistyczno-uruchomieniowe Wykorzystano materiały firmy Cypress PUE-w16 1

PSoC (Cypress) Możliwości bloków cyfrowych i analogowych Narzędzia

2 Ogólna struktura układów PSoC (Cypress) PUE-w16 2

3 Ogólna struktura układów PSoC (Cypress) PUE-w16 3

4 Obudowy, końcówki PUE-w16 4

5 Charakterystyka grup układów PSoC PUE-w16 5

6 Zasoby systemowe układów PSoC PUE-w16 6

7 Switch-mode Pump (przekształtnik podwyższający) PUE-w16 7

8 Schemat systemu cyfrowego PUE-w16 8

9 Możliwości konfiguracyjne bloków cyfrowych PWMs (8 to 32 bit) PWMs with Dead band (8 to 24 bit) Counters (8 to 32 bit) Timers (8 to 32 bit) UART 8 bit with selectable parity SPI master and slave I2C slave, master, multi-master (1 available as a System Resource) Cyclical Redundancy Checker/Generator (8 to 32 bit) IrDA (up to 4) Pseudo Random Sequence Generators (8 to 32 bit) PUE-w16 9

slave I2C slave, master, multi-master (1 available as a System Resource) Cyclical Redundancy

10 Blok cyfrowy PUE-w16 10

11 Organizacja części analogowej PUE-w16 11

12 Organizacja części analogowej PUE-w16 12

13 Blok analogowy ciągły PUE-w16 13

14 Blok analogowy SC PUE-w16 14

15 Wzmacniacz pomiarowy z 2 bloków ciągłych PUE-w16 15

16 Wzmacniacz pomiarowy z bloków ciągłych i SC PUE-w16 16

17 (regulator wentylatora) PUE-w16 17

18 Narzędzia projektowe: PSoC Designer PUE-w16 18

19 Narzędzia projektowe: PSoC Express PUE-w16 19

20 Key Concepts PSoC Express : podstawowe pojęcia Drivers: Input and output drivers...encapsulate the parameters and behavior of various input and output devices.... Interface drivers allow your design to communicate with an external device (currently via I2C) to implement control or status functionality. Valuators: Valuator elements provide the means to internally store data values. Valuators also enable the design to convert a value from one type to another or perform almost any intermediate processing or conditioning of data within a PSoC design. A valuator is often used between an input and an output driver to implement the desired behavioral logic. Transfer Functions:... In PSoC Express we use this term to refer to the behavioral definition of an element that has an output. A transfer function defines the output value of the associated design element based on the state of other elements in the design and the type of transfer function selected. Output drivers and valuators have an associated transfer function that defines their behavior. PUE-w16 20

Valuators: Valuator elements provide the means to internally store data values.

21 PSoC Express : wysoki poziom abstrakcji A central advantage of the PSoC Express design philosophy is that of hardware abstraction;... The PSoC Express input and output drivers handle the details of the hardware allowing you to concentrate on the behavioral design of your project. Let s look at how this abstraction works with respect to a simple pushbutton...what does On mean in our design, and how we will represent it? 1. Pressed (on) always means logic 0. (?) 2. Pressed always means logic 1. (?) 3. It doesn t matter. (?) The correct answer is 3, because whenever we use the pushbutton in our design, we always use the symbolic states On and Off. The actual electrical state of the hardware is translated into the symbolic state by the device driver (not by us). In both cases (1 or 2) the same behavioral definition for the LED can apply, specifically: if (Input1 state is On) then (set LED state to On) else (set LED state to Off) Conclusion: the drivers handle the hardware details and designs become easier to create, verify, and re-use. PUE-w16 21

22 First Example: Pushbutton and LED PSoC Express : prosty przykład Objectives ƒ Select and place one input and one output driver in a design. ƒ Demonstrate using a transfer function to determine the behavior of an output based on the state of an input.. ƒ Use the built-in PSoC Express simulation mode to test the design Design Elements ƒ Input Driver - Pushbutton ƒ Output Driver - LED (On/Off) ƒ Transfer Function - Table Lookup PUE-w16 22

23 PSoC Express : prosty przykład Second Example: Potentiometer and Blinkable LED Using PriorityEncoder Objective ƒ Control the state of an On/Off/Blinking LED based on the position setting of a potentiometer. ƒ..the creation of the logical expressions to define an output driver Priority Encoder transfer function ƒ ƒ Build the project select a device, assign I/O pins and generate the HEX file Use PSoC Programmer to program a target device. Design Elements ƒ Input Driver - Potentiometer ƒ Output Driver - LED (On/Off with Blink) ƒ Transfer Function - Priority Encoder PUE-w16 23

24 PSoC Express: wejścia (przycisk,potencjometr) PUE-w16 24

25 PSoC Express: wyjścia LED (On,Off; On,Off,Blink) PUE-w16 25

26 PSoC Express: (przykład 1) PUE-w16 26

27 PSoC Express: selectingtransfer Function PUE-w16 27

28 PSoC Express: selectingtransfer Function PUE-w16 28

29 PSoC Express: definingtransfer Function PUE-w16 29

30 PSoC Express: defining Priority Encoder PUE-w16 30

31 PSoC Express: simulation mode PUE-w16 31

32 PSoC Express: wybór chipu, przypisanie końcówek PUE-w16 32

33 PSoC Express: Project Builder PUE-w16 33

34 PSoC Express: Programmer PUE-w16 34

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