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Chapter 3 Introduction to MR308

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Key input

Task

Remote control

Task

LED illumination

Task

real-time

Volume control

Task

Monitor

Task

Mechanical

control

Task

Figure 3.3 Example System Configuration with Real-time OS(Audio Equipment)

In other words, the real-time OS is the software that makes a one-microcomputer system look like operating a

number of microcomputers.

In the real-time OS, the individual programs, which correspond to a number of microcomputers used in a con-

ventional system, are called tasks.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 161 162

M3T-MR308/4 V.4.00 1
• Release Note 3
• Users Manual (PDF file) 3
Contents 5
List of Figures 8
List of Tables 10
OS:Operating System 14
2.3 MR308 Features 17
3.1 Concept of Real-time OS 20
Key input 22
Real-time OS 24
Register stored 25
Register not stored 25
3.2 Service Call 26
Real-time OSProgram 28
Starting the task 28
ID number 28
3.3 Task 29
DORMANT 30
SUSPENDED 30
Priority 33
Called the task context 35
Time-out counter 36
Flag wait pattern 36
3.4 System States 37
1. Interrupt Handler 37
2. Cyclic Handler 37
3. Alarm Handler 37
3.5.1 Module Structure 40
3.5.2 Module Overview 41
Startup request count > 0 42
0 0 1 2 1 44
Number of 45
• Delay task (dly_tsk) 46
Returned after use 47
WAIT state 48
Data Data 51
Message Message 52
Message 53
get_tim service call 57
set_tim service call 57
• Set System Time (set_tim) 58
Move the end of the queue 61
Save Registers 62
Task Selection 62
Overview 69
Configuration file 71
Figure 4.2 Program Example 73
4.2.3 Configurator Execution 75
4.2.4 System generation 75
4.2.5 Writing ROM 75
5.2.1 Writing Task 83
5.5 Regarding Interrupts 89
5.5.3 Controlling Interrupts 90
4. Precautions 92
5.9 Memory Allocation 100
• asm_sec.inc 100
• c_sec.inc 100
Symbol 107
• 10ms 108
• 10.5ms 108
MPU clock 111
ID No 117
ID name 117
Number of data queues 118
Select message queue 120
Maximum message priority 120
ID Name 122
Section name 122
Memory pool size 122
Start address 125
Extended information 125
Vector No 126
Chapter 6 Using Configurator 129
- 119 129
- 120 130
- 121 131
- 122 132
6.2.1 Configurator Overview 133
Command Options 136
-v Option 136
-V Option 136
-m Option 136
Error messages 139
Warning messages 141
Other messages 141
6.3 Editing makefile 142
OS-independent handler 146
Processing 148
Execution 149
7.2 Stacks 150
• User Stack 150
• System Stack 150
8.2 Program Source Listing 153
8.3 Configuration File 154
Chapter 9 Separate ROMs 155
M3T-MR308/4 162
User's Manual 162

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