Explorer 8开发板MCP2221跳线怎么连接

我在Replorer 8开发板中使用RS232协议，但仍然没有得到结果。起初，我认为MCP2221是UART协议的驱动程序，现在我发现它只是一个转换器，它能够将USB转换成UART/I2C，在这点上我是正确的吗？接下来，我需要一些跳线引脚的澄清。正如在用户指南中提到的，我在J53-J55和J54-J56之间连接了跳线。我看到USB 2用于这个实验，所以使用9V适配器并在J2中连接BRD 5V之间的跳线。这是正确的方法吗？然后我交叉连接了DX9连接器和PIC16F1719集成电路的TX-RX引脚，但是在超级终端中仍然得到一些垃圾值，并且我检查了我的程序和终端的波特率。下面附上代码，请参阅



      以下为原文

    I'm working RS232 protocol in explorer 8 development board, but still i haven't get a result. Initially I thought that MCP2221 is a driver for UART protocol, now i found that it's just a convertor which is capable of converting USB to UART/I2C, Am i correct in this point?
Next I need some clarifications in jumper pins. As mentioned in user guide i've connected the jumpers between J53-J55 and J54-J56. I seen that USB 2.0 is used for this experiment, so used 9V adapter and connected the jumper between BRD-5V in J2. Is this a correct way?
Then i cross connected the TX-RX pins of DB9 connector and PIC16F1719 IC, but still i get some garbage value in hyperterminal and also i've checked the baudrate for my program and terminal.
The code is attached below, please refer that

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uart877A.txt (3.22 KB) - downloaded 37 times