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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN3128 датащи(PDF) 19 Page - STMicroelectronics |
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AN3128 датащи(HTML) 19 Page - STMicroelectronics |
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19 / 105 page  AN3128 Multi-input embedded GUI library Doc ID 16918 Rev 5 19/105 3.4 Library architecture Library architecture is thought out and developed in two separate layers: ● API layer ● HAL layer This layer architecture improves the code re-usability splitting the application programming interface code (fully portable and re-usable) from the hardware abstraction layer code (hardware dependent and written upon the LCD library). Figure 5. Firmware library architecture 3.4.1 API layer The application programming interface layer allows the final application to use the library as a black-box. The library firmware encapsulation feature and exported API allow a full control of the LCD and touchscreen without knowing, in-depth, LCD registers and SPI/I2C read/write operation steps for the LCD and touchscreen respectively. ● The API layer includes the following files: – graphicObject.h – graphicObject.c – graphicObjectTypes – cursor.c – cursor.h See Section 4.1 for a more detailed description. 3.4.2 HAL layer The hardware abstraction layer is directly built into the specific LCD firmware library and allows the build-upon layers, like the API layer, to implement its functions without knowing, in-depth, the LCD, MCU and touchscreen controller used. This improves the library code re- |
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