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About the Document
History
Revision
Date
Author
Description
1.0
2018-04-23
Lebron LIU
Initial
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BC26-OpenCPU User Guide
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Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 5
Figure Index ................................................................................................................................................. 6
1 Introduction .......................................................................................................................................... 7
2 OpenCPU Platform ............................................................................................................................... 8
2.1. System Architecture .................................................................................................................... 8
2.2. Open Resources ......................................................................................................................... 9
2.2.1. Processor ......................................................................................................................... 9
2.2.2. Memory Scheme .............................................................................................................. 9
2.3. Interfaces..................................................................................................................................... 9
2.3.1. Serial Interfaces ............................................................................................................... 9
2.3.2. GPIO .............................................................................................................................. 10
2.3.3. EINT ............................................................................................................................... 10
2.3.4. PWM ............................................................................................................................... 10
2.3.5. ADC ................................................................................................................................ 10
2.3.6. IIC ................................................................................................................................... 10
2.3.7. SPI .................................................................................................................................. 10
2.4. Development Environment ........................................................................................................ 10
2.4.1. SDK ................................................................................................................................ 10
2.4.2. Editor .............................................................................................................................. 11
2.4.3. Compiler & Compiling .................................................................................................... 11
2.4.4. Download ....................................................................................................................... 12
2.4.5. How to Program ............................................................................................................. 12
3 Basic Data Types ............................................................................................................................... 16
3.1. Required Header ....................................................................................................................... 16
3.2. Base Data Type ......................................................................................................................... 16
4 System Configuration ........................................................................................................................ 18
4.1. Configuration for Tasks ............................................................................................................. 18
4.2. Configuration for GPIO ............................................................................................................. 19
4.3. Configuration for Customizations .............................................................................................. 19
5 API Functions ..................................................................................................................................... 20
5.1. System API ................................................................................................................................ 20
5.1.1. Usage ............................................................................................................................. 20
5.1.2. API Functions ................................................................................................................. 22
5.1.3. Possible Error Code ....................................................................................................... 30
5.1.4. Example ......................................................................................................................... 31
5.2. Time API .................................................................................................................................... 32
5.2.1. Usage ............................................................................................................................. 32
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5.2.2. API Functions ................................................................................................................. 32
5.2.3. Example ......................................................................................................................... 34
5.3. Timer API ................................................................................................................................... 35
5.3.1. Usage ............................................................................................................................. 35
5.3.2. API Functions ................................................................................................................. 36
5.3.3. Example ......................................................................................................................... 38
5.4. Memory API ............................................................................................................................... 39
5.4.1. Usage ............................................................................................................................. 39
5.4.2. API Functions ................................................................................................................. 39
5.4.3. Example ......................................................................................................................... 40
5.5. Hardware Interface API ............................................................................................................. 40
5.5.1. UART .............................................................................................................................. 40
5.5.2. GPIO .............................................................................................................................. 46
5.5.3. EINT ............................................................................................................................... 53
5.5.4. PWM ............................................................................................................................... 59
5.5.5. ADC ................................................................................................................................ 62
5.5.6. IIC ................................................................................................................................... 65
5.5.7. SPI .................................................................................................................................. 71
5.6. Debug API ................................................................................................................................. 76
5.6.1. Usage ............................................................................................................................. 76
5.6.2. API Functions ................................................................................................................. 76
5.7. RIL API ...................................................................................................................................... 77
5.7.1. AT API ............................................................................................................................. 78
6 Appendix ............................................................................................................................................. 80
6.1. Reference .................................................................................................................................. 80
