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7.3 Modifying MR100 Startup Program
MR100 comes with two types of startup programs as described below.
• start.a30
This startup program is used when you created a program using the assembly language.
• crt0mr.a30
This startup program is used when you created a program using the C language.
This program is derived from "start.a30" by adding an initialization routine in C language.
The startup programs perform the following:
• Initialize the processor after a reset.
• Initialize C language variables (crt0mr.a30 only).
• Set the system timer.
• Initialize MR100's data area.
Copy these startup programs from the directory indicated by environment variable "LIB100" to the current directory.
If necessary, correct or add the sections below:
• Setting processor mode register
Set a processor mode matched to your system to the processor mode register. (58-60th line in crt0mr.a30)
• Adding user-required initialization program
When there is an initialization program that is required for your application, add it to the 140th line in the C
language startup program (crt0mr.a30).
• Enable the 138th – 139th line in the C language startup program (crt0mr.a30) if standard I/O function is
used.
- M3T-MR100/4 V.1.00 1
- • Release Note 3
- • Users Manual (PDF file) 3
- Contents 5
- List of Figures 10
- List of Tables 13
- 2. General Information 17
- 2.3 MR100 Features 20
- 3. Introduction to Kernel 21
- Key input 23
- Monitor 24
- Register 26
- Memory map 26
- Register stored 27
- Register not stored 27
- 3.2 Service Call 28
- 3.3 Object 34
- 3.4 Task 35
- DORMANT 36
- SUSPENDED 36
- Priority 39
- Called the task context 41
- 3.5 System States 42
- 1. Interrupt Handler 42
- 2. Cyclic Handler 42
- 3. Alarm Handler 42
- 0 1 2 3 4 5 6 7 45
- 3.7 Stacks 48
- • User Stack 48
- • System Stack 48
- 4. Kernel 49
- 4.1.2 Module Overview 50
- Startup request count > 0 51
- 0 0 1 2 1 53
- Number of 54
- • Delay task (dly_tsk) 56
- Returned after use 57
- WAIT state 58
- Data Data 61
- Message Message 62
- Message 63
- • Processing speed 66
- • Memory usage efficiency 66
- • Ease of configuration 66
- • Set System Time (set_tim) 69
- Move the end of the queue 72
- Save Registers 73
- Task Selection 73
- 5. Service call reffernce 77
- No. Item Content 98
- - 102 116
- - 105 119
- - 107 121
- - 110 124
- - 112 126
- - 115 129
- - 117 131
- - 121 135
- - 124 138
- - 126 140
- - 132 146
- - 134 148
- - 138 152
- - 140 154
- (handler only) 155
- - 142 156
- - 147 161
- - 149 163
- - 152 166
- - 154 168
- - 158 172
- - 161 175
- - 164 178
- - 167 181
- - 173 187
- - 176 190
- - 190 204
- - 193 207
- - 198 212
- - 200 214
- - 202 216
- Overview 219
- - 206 220
- Figure 6.2 Program Example 222
- 6.2.4 System generation 223
- 6.2.5 Writing ROM 224
- 7. Detailed Applications 225
- - 214 228
- 7.2.1 Writing Task 229
- - 217 231
- For examples: 231
- - 219 233
- - 220 234
- - 221 235
- - 222 236
- 7.4 Memory Allocation 238
- • asm_sec.inc 238
- • c_sec.inc 238
- 8. Using Configurator 241
- Symbol 242
- MPU clock 245
- ID No 251
- ID name 251
- Number of data queues 252
- Select message queue 254
- Maximum message priority 254
- ID Name 256
- Section name 256
- Message buffer size 256
- Maximum message size 256
- Start address 259
- Extended information 259
- Vector No 260
- 8.2.1 Configurator Overview 268
- Configuration file name 270
- Error messages 271
- Warning messages 273
- 9.2 Program Source Listing 275
- 9.3 Configuration File 276
- XXX_XXX() 278
- System Stack 279
- Stack Section 279
- Sections used in MR100 280
- User stack size = 280
- Stack growing direction 281
- Σβi( γ) 282
- The necessary system stack 283
- Interrupt 283
- = register to be used 285
- 10.2 Necessary Stack Size 286
- 11. Note 289
- 17. Precautions 290
- 12. Appendix 293
- - 283 297
- - 284 298
- - 285 299
- - 288 302
- M3T-MR100/4 304
- User's Manual 304
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