1˵
     1SPI ģʽȫ˫ DMA ͺ͵߽
2ʹû
     KEIL MDK-ARM 5.30.0.0
     Ӳ      N32G031CL-STB V1.0
3ʹ˵
     ϵͳã
         1SystemClock48MHz
         2GPIOģʽ DEMO 壩SPI1: SCK--PA5 MISO--PA6MOSI--PA7
                         ģʽ DEMO 壩SPI1: SCK--PA5 MISO--PA6MOSI--PA7
         3־ӡģʽ DEMO  PA9(TX)ʣ115200
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         1سλУ
         2Ӻôڴӡߣϵ磬鿴ӡԳɹ
4ע
     Ҫ demo ϣһ¼ģʽһ¼ģʽһϵ磬ӵ VCC  GND

1. Function description
    1. SPI master mode full duplex DMA send and single-wire receive data
2. Use environment
    Software development environment: KEIL MDK-ARM 5.30.0.0
    Hardware Environment: Developed based on N32G031CL-STB V1.0
3. Instructions for use
    System Configuration;
        1. SystemClock48MHz
        2. GPIO(Master mode DEMO board) SPI1: SCK--PA5, MISO--PA6, MOSI--PA7
                       (Slave mode DEMO board)    SPI1: SCK--PA5, MISO--PA6, MOSI--PA7
        3. Log print: master mode DEMO board PA9(TX), baud rate: 115200
    Instructions:
        1. After compiling, download the program to reset and run;
        2. Connect the serial port printing tool, power on, and check that the print test is successful;
4. Matters needing attention
    Two demo boards are required, one board to program the master mode program, one board to program the slave mode program, 
    the two boards need to be powered on together, and connect the VCC and GND of the two boards;