MikroElektronika PIC Microcontrollers PIC16 Uživatelský manuál Strana 53
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Hodnocené. / 5. Na základě hodnocení zákazníků
mikroBASIC
- Basic Compiler for Microchip PIC microcontrollers
48
mikroBASIC
MikroElektronika: Development tools - Books - Compilers
making it simple...
page
Directives are words of special significance for the mikroBasic, but unlike other
reserved words, appear only in contexts where user-defined identifiers cannot
occur.
You cannot define an identifier that looks exactly like a directive.
Absolute directive specifies the starting address in RAM for variable (if variable is
multi-byte, higher bytes are stored at consecutive locations).
Directive absolute is appended to the declaration of variable:
dim rem as byte absolute $22
' Variable will occupy 1 byte at address $22
dim dot as word absolute $23
' Variable will occupy 2 bytes at addresses $23 and $24
DIRECTIVES
Overview
Directive
Meaning
absolute
Specifies the exact location of variable in RAM
Byte variable will occupy
1 byte at address $22
Word variable will occupy
2 bytes
At addresses $23 and $24
PIC MCU RAM
m[0]
- MikroElektronika 1
- Table of Contents 2
- To readers note 5
- C H A P T E R 6
- CODE EDITOR 8
- Advanced Editor Features 9
- Comment / 10
- Uncomment Icon 10
- CODE EXPLORER 11
- CREATING FIRST PROJECT 12
- Compile Icon 15
- Debug Icon 15
- PROJECTS 18
- Managing Source Files 19
- Compile and Link Source Code 21
- DEBUGGER 22
- ERROR WINDOW 24
- ASSEMBLY VIEW 25
- STATISTICS 26
- Chapter 27
- Procedures (Details) Window 28
- INTEGRATED TOOLS 29
- KEYBOARD SHORTCUTS 31
- Reference 33
- IDENTIFIERS 34
- KEYWORDS 35
- DATA TYPES 36
- For example: 38
- Numerals 40
- Character Strings 40
- CONSTANTS 41
- VARIABLES 44
- Additional 45
- ' beginning of a module 46
- COMMENTS 48
- EXPRESSIONS 49
- DECLARATIONS AND STATEMENTS 51
- Statements 52
- DIRECTIVES 53
- ' byte at the same time 54
- ' example for P16F877A 54
- PROCEDURES AND FUNCTIONS 55
- ' some code 56
- ' routine 56
- ' case end 58
- Main Unit File 61
- Compiler 62
- Output Generator 62
- SCOPE (IDENTIFIER VISIBILITY) 63
- PROGRAM ORGANIZATION 65
- TYPE CONVERSION 67
- Example 1: 68
- Example 2: 69
- Example 3: 69
- ' B becomes $00ff 70
- ' B becomes -10 71
- ' C becomes 213 71
- 1 01 11 100 72
- 0 00 0 00 01 72
- 1 1 1 10000 72
- OPERATORS 78
- Runtime Behavior 80
- Arithmetic Operators 81
- Specific 83
- Boolean Operators 84
- Logical (Bitwise) Operators 85
- ' Bb becomes $00a0 86
- ' Bb becomes $70f4 86
- Overview 89
- Rules for 89
- Comparing 89
- Expressions 89
- CONDITIONAL STATEMENTS 92
- Select Case Statement 93
- If Statement 95
- Examples 96
- For Statement 98
- Do..Loop Until Statement 100
- While Statement 101
- ASM Statement 102
- PIC MCU SPECIFIC 103
- COMPILER ERROR MESSAGES 106
- Library Routines 109
- Built-in and 109
- BUILT-IN ROUTINES 110
- LIBRARY ROUTINES 112
- 1-Wire Library 113
- PIC16F877 115
- ADC Library 116
- Figure (ADC HW connection) 117
- CAN Library 118
- CAN_OP_MODE 124
- CAN_TX_MSG_FLAGS 124
- CAN_RX_MSG_FLAGS 125
- CAN_MASK 125
- CAN_FILTER 126
- CAN_CONFIG_FLAGS 126
- PCA82C250 129
- Shielded pair, less 129
- CANSPI Library 130
- CAN Library Constants 136
- Compact Flash Library 139
- Compact Flash Connector 144
- (TOP VIEW) 144
- Compact Flash Card 144
- EEPROM Library 145
- I2C Library 146
- LCD Library 150
- Commands 151
- Figure: LCD HW connection 152
- PWM Library 153
- Figure: PWM demonstration 154
- RS485 Library 155
- RS485slave_write 158
- Connecting PC and PIC via 160
- RS485 communication line 160
- SPI Library 161
- Value Meaning 163
- 8. 8. 8. 8. 8. 8. 8. 8 165
- USART Library 166
- Figure: RS232 HW connection 168
- Numeric Formatting Routines 169
- Utilities 171
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