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MSP432P401R extension v1.2.0

 
Overview

//Modification log
1, 2023/03/20 - After testing, the RT8289 voltage stabilization scheme failed, and no clear reason was found. It was replaced with LM2596 voltage stabilization, and simple modifications were made to the overall circuit;
2. 2023/03/31 - Physical silk screen It is smaller and will be adjusted later;
3. 2023/04/01 - The distance between the extended LORA interface and the motherboard is small and cannot adapt to all wireless serial port modules. It will be adjusted later and the version number is modified to v1.1.1;
4. 2023/04 /01 - The order of 5V, RX, TX, and GND in the extended serial port USART2&USART2 is different, and will be adjusted later;
5. 2023/04/01 - Due to cost considerations, the buzzer package will be replaced with a common plug-in, D=12mm, and there will be a predetermined buzzer. 6.
2023/04/05 - For the convenience of wiring, the serial numbers of some peripheral circuits are inconsistent with the silk screen printing, and will be adjusted later;
7. 2023/04/05 - A friend caused trouble during use because he did not inform RX&TX that the internal connection was reversed. Subsequently, this part of the serial port will be modified according to habits and the internal reverse connection will be canceled;
8. 2023/04/15 - The count value of the encoder is obtained through external interrupts, but P7, P8, P9, and P10 do not support external interrupts, and the pin resource allocation is carried out Modification;
9. 2023/04/18 - The above issues are modified, and the modified version number is v1.2.0;
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