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SEP3203是东南大学自主研发的基于ARM7TDMI内核的一款微处理器。该处理器内置了LCD控制器,在与VGA接口的模块连接时需要对其进行转换。同时该处理器内部没有I2C总线控制器,在需要使用I2C总线进行通讯时要用GPIO口对其进行模拟。本文将介绍基于SEP3203处理器的LCD转VGA接口的硬件设计框架,以及用GPIO口模拟I2C总线的软件设计。
SEP3203 is independently developed by Southeast University based on the ARM7TDMI core microprocessor. The processor has a built-in LCD controller that needs to be converted when connected to a module with a VGA connector. At the same time, there is no I2C bus controller inside the processor. When it needs to use I2C bus to communicate, it should be simulated by GPIO port. This article will introduce the SEP3203 processor LCD to VGA interface hardware design framework, as well as the use of GPIO port simulation I2C bus software design.