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通过片上的同步串行接口实现异步串行接口的仿真

消耗积分:3 | 格式:rar | 大小:105 | 2009-06-30

张伟

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The C500 microcontroller family provides usually only one on-chip asynchronous serial communication channel (USART). If a second USART is required, an emulation of the missing interface may help to avoid an external hardware solution with additional electronic components.
1 Introduction 3
2 General Operation and Hardware Environment 4
2.1 Supported Features 4
2.2 Required Resources 5
2.3 External Routing 6
2.4 Principles of Emulation 7
2.4.1 USART Write  7
2.4.2 USART READ 8
3 USART Emulation Software Description 9
3.1 Software Structure 9
3.2 Main Program 10
3.3 Emulation Subroutines  12
3.4 Baud Rate Calculation. 12
3.5 Load Measurement 15
3.6 Performance Limitations 16
3.7 Make File 17
3.8 Support of KitCON-513 Evaluation Board 18

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