Programming Embedded Systems I ppt

... distributed and copied, provided that copyright notice at the foot of each OHP page is clearly visible in all copies. VIII Seminar 6: Creating an Embedded Operating System 139 Introduction ... Example: Reading and writing bytes (review) 48 Example: Reading and writing bits (simple version) 49 Example: Reading and writing bits (generic version) 51 The need for pull-up resist...

Ngày tải lên: 10/07/2014, 18:20

... VIII Seminar 6: Creating an Embedded Operating System 139 Introduction 140 Timer-based interrupts (the core of an embedded OS) 144 The interrupt service routine (ISR) 145 Automatic timer ... material from: Pont, M.J. (2002) Embedded C”, Addison-Wesley. PES I - 25 Oscillator Hardware • All digital computer systems are driven by some form of oscillator circuit. • This ci...

Ngày tải lên: 13/12/2013, 11:15

... systems , Addison-Wesley. PES II - 17 One possible initialisation function: /* */ void SCH_Init_T2(void) { tByte i; for (i = 0; i < SCH_MAX_TASKS; i+ +) { SCH_Delete_Task (i) ; } /* SCH_Delete_Task() ... Contains material from: Pont, M.J. (2001) “Patterns for triggered embedded systems , Addison-Wesley. PES II - 11 Review: Building a scheduler void main(void) { Timer_2_I...

Ngày tải lên: 13/12/2013, 11:15

... for your application by explicitly providing this information in the linker ‘Additional Options’ dialogue box. This approach is used in most of the examples in the “PTTES” book. C OPYRIGHT © M ICHAEL ... triggered embedded systems , Addison-Wesley. PES II - 26 To deal with this situation, you have two realistic options: 1. You can prevent the compiler from using the OVERLAY directive by d...

Ngày tải lên: 13/12/2013, 11:15

... (2002) Embedded C”, Addison-Wesley. PES I - 65 /* *- DISPLAY_SWITCH_STATUS_Init() Initialization function for the DISPLAY_SWITCH_STATUS library. -* */ void DISPLAY_SWITCH_STATUS_Init(void) { ... input is received. It will remain indefinitely in State A if this input is not received. Such systems have no concept of time, and - therefore - no way of implementing timeout or similar beha...

Ngày tải lên: 01/04/2014, 06:21

... categories: time- sensitive constraints and time-critical constraints. If a task is time critical, it must take place within a set window of time, or the function controlled by that task fails. ... objective. A little voice in your ear now biases your endless design decisions toward the common goals of the design team. This extra insight into the product specifications can significantly...

Ngày tải lên: 13/12/2013, 11:15

... main possibilities: • ‘Pause’ the scheduling by disabling the scheduler interrupt before beginning the critical section; re-enable the scheduler interrupt when we leave the critical section, ... “Patterns for triggered embedded systems , Addison-Wesley. PES II - 81 Reliability and safety issues As we have seen, in order to deal with critical sections of code in a fully pre-emptive...

Ngày tải lên: 13/12/2013, 11:15

... of the machine language code from all of the input object files will be in the text section of the new file, and all of the initialized and uninitialized variables will reside in the new data ... target embedded system. This split of responsibilities is shown in Figure 3-2. Programming Embedded Systems in C and C++ - 50 - is complete. You will appreciate the extra effort you put...

Ngày tải lên: 17/03/2014, 13:20

... II - 138 Determining the required baud rate Description Size (bits) Data 64 Start bit 1 Identifier bits 11 SRR bit 1 IDE bit 1 Identifier bits 18 RTR bit 1 Control bits 6 CRC bits 15 Stuff bits ... transmission of 9-bit serial data: Description Size (bits) Data 9 bits Start bit 1 bit Stop bit 1 bit TOTAL 11 bits / message • In this configuration (typically, the UART used in Mode 3), 11 bits...

Ngày tải lên: 01/04/2014, 06:21

... Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1. INTRODUCTION The e ver increasing complexity ... multiobjective optimization,” in Evolutionary Methods for Design, Optimisa- tion and Control with Application to Industrial Problems,K. Giannakoglou, D. Tsahalis, J. Periaux, K. D. Papailiou, ... ex...

Ngày tải lên: 22/06/2014, 19:20