An Introduction to Embedded System

Transcription

1 An Introduction to Embedded System ) ) 2006/11/15 1

2 Let you know me The educational background EN bachelor degree in National Taipei University of Technology(1997~2001) EE Master degree in National Chung Cheng University(2001~2003) My major is about Embedded system design Digital system design USB hardware and software design CPU design TV System The work experience The hardware engineer in Coretronic(2003~2005) The senior hardware engineer in Coretronic(2005~present) 2

3 Spot the Computer Where is embedded system in your world? 3

4 Hidden Computers 4

5 Mobile TV 5

6 PC 6

7 7

8 理 度 8

9 類 立 立 行 理 9

10 類 便 10

11 類 行 料 GSM PHS 行 11

12 You have to own EE knowledge 12

13 理 AGP 北 PCI USB IDE BIOS ISA 流 Super IO 13

14 ADC CPU SPI Digital I/O ROM IIC Host Computer UART RAM Timers Bus Interface Memory Network Interfaces I/O 14

15 Application Operating System Firmware Firmware Hardwre Hardware Complex embedded computer Simple embedded computer 15

16 易 率 理 不 16

17 vs 易 Firmware Complex embedded computer Hardware Simple embedded computer 17

18 易 流 流 流 18

19 理 料 林 理 料 19

20 令 行 令 料 ( 兩 兩 料路 ) 8051,Microchip PIC families, Atmel AVR 林 令 令 料 料路 Intel 80x86/Pentium, Motorola, Mot 68xx uc families 20

21 見 X86 ARM MIPS PowerPC The others M68K,

22 Boot Loader (1) : processor memory controller (2)Memory Write/Read (3)Upgrade Image file RS-232 Ethernet (4) kernel image 行 kernel 22

23 U-Boot source 23

24 Boot Loader V.S ISP In-System Programming (ISP) Upgrade Hex code Any Time Boot Loader Initial Hardware Upgrade Image file POR (Power of Reset) Run O.S 24

25 What is an Operating System? An operating system is the software that controls/abstracts hardware n User applications can thus be simpler and device-independent 25

26 Microsoft Dos Microsoft Windows CE Microsoft Windows Mobile Dopod 818. Palm Embedded Linux 路 FAT EXT2 NFS 26

27 Microsoft Dos 了 Q-DOS " QUICK AND DISK OPERATING SYSTEM " MS-DOS, IBM 8088 理, 16 27

28 Microsoft Windows CE/Mobile Windows CE PDA WebPAD Thin Client Windows CE SIMPad ( ) Windows Mobile. Dopod

29 Build a Window CE Image File 1. Serial port 2. USB device 3. power plug 4. power switch 5. USB device (Host) 6. JTAG 7. NAND Flas 8. PCMCIA control chip 9. Flash ROM switch 10. System Bus switch 11. TFT/STN LCD 12. Control button 13. Microprocessor 14. SD Card interface M SDRAM 16. Audio output 17. Ether net RJ45 interface 18. AMD NOR Flash ROM 19. Reset 29

30 Build a Window CE Image File Set P.F 30

31 Platform configurations 31

32 This step is to include applications and media components 32

33 Ethernet Boot Loader 33

34 WinCE OS will finish loading 34

35 Palm PDA 率 PDA Palm 了 理.. Palm 不 連 量便 Palm PDA Smart phone (Trep 700p) 35

36 EPOC (Symbian) Psion PDA 例 Nokia 9110 ( ) 列 EPOC (ARM3 only) 36

37 EPOC (Symbian) Web Time Contact book 37

38 EPOC (Symbian) Brand Model System O.S Version Motorola A1000 GSM900/180 0/1900/WCD MA2100 V7.0 Nokia N91 GSM900/180 0/1900/WCD MA2100 V9.1 Samsung SGH-D720 GSM900/180 0/1900 V7.0S 38

39 Cross compiler A cross compiler is a compiler capable of creating executable code for a platform other than the one on which the cross compiler is run. Such a tool is handy when you want to compile code for a platform that you don't have access to, or because it is inconvenient or impossible to compile on that platform (as is the case with embedded systems, on which various kinds of microcontrollers run with a minimal amount of memory for their own purpose). 39

40 RS-232 Interfcec 10/100 Ethernet CPU MV68CV328 Motorola USB Host and Device 40

41 Boot Mode 41

42 42

43 Interrupt in uclinux 43

44 44

45 45

46 46

47 HOST and TARGET 47

48 48

49 Hardware Interface 49

50 What is UART? (Universal Asynchronous Receiver Transmitter) Communication standard implemented in the 60 s. Simple, universal, well understood and well supported. Slow speed communication standard: up to 1 Mbits/s Asynchronous means that the data clock is not included in the data: Sender and Receiver must agree on timing parameters in advance. Start and Stop bits indicates the data to be sent Parity information can also be sent 50

51 UART -Applications 51

52 Share my case about RS-232 RS232 DTV Board PDP Video Board 52

53 Share my case S_Code Add_Code Cmd_Code Dat_Code CRC_Code E_Code Ack_Code DTV Board RS232 Video Board RS232 53

54 What s happened in RS232 Interface? You have any ideals when you own these information. 54

55 What is SPI? Serial Peripheral Interface (SPI) is a 4-wire full-duplex synchronous serial data link: SCLK: Serial Clock MOSI: Master Out Slave In -Data from Master to Slave MISO: Master In Slave Out -Data from Slave to Master SS: Slave Select Originally developed by Motorola Used for connecting peripherals to each other and to microprocessors Shift register that serially transmits data to other SPI devices Actually a 3 + n wire interface with n = number of devices Only one master active at a time Various Speed transfers (function of the system clock) 55

56 SPI -How are the connected devices recognized? Simple transfer scheme, 8 or 16 bits Allows many devices to use SPI through the addition of a shift register Full duplex communications Number of wires proportional to the number of devices in the bus 56

57 What is CAN? CAN(Controller Area Network) Proposed by Bosch with automotive applications in mind(and promoted by CIA -of Germany -for industrial applications) Relatively complex coding of the messages Relatively accurate and (usually) fixed timing All modules participate in every communication Content-oriented (message) addressing scheme 57

58 CAN Protocol 58

59 I2C Bus Features Only 2 bus lines required: data (SDA) and clock (SCL) Each device connected to the bus is software addressable by a unique address 2 modes: Master-Transmitter and as Master-Receiver Multi-master capable protocol: collision detection arbitration Serial bi-directional data transfers: 100 kbit/s Standard-mode 400 kbit/s Fast-mode 3.4 Mbit/s High-speed mode Maximum bus capacitance = 400 pf (without repeaters) which is about devices or 10 ft of wire (100 pf/meter) 59

60 Transmission Standards 60

61 The I2C Bus 61

62 Typical Signaling Characteristics 62

63 I2C Bus Basics -Bus Operation 63

64 I2C Bus Transaction 64

65 USB: Universal Serial Bus USB 2.0Host Controller USB H.S Hub USB 1.1 Hub USB H.S Device USB 1.1 Hub USB 1.1 Device USB 1.1 Device 65

66 USB Transfer Type There are 4 transfer types in USB Control Transfer Endpoint 0( Default ) Interrupt Transfer Bulk Transfer Isochronous Transfer 66

67 USB Emulation Set Address Get All USB Descriptor Device Descriptor Configuration Descriptor String Descriptor Interface Descriptor Endpoint Descriptor Find USB Device Driver 67

68 Control Type Transfer Setup Data State SETUP IN... IN IN OUT Setup Data State SETUP OUT OUT IN Setup Data State SETUP IN 68

69 Control Type Flow control 69

70 CDMA2000 SmartPhone 70

71 Digital Camera Block Diagram 71

72 Analog TV Block Diagram 72

73 Digital TV(LCD) Block Diagram 73

74 Digital TV(PDP) Block Diagram 74

75 DVD Player 75

76 DVD Recoder 76

77 GSM Mobile 77

78 The End Do you have any questions about embedded system? Thanks. 78