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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了SPI主机中断收发数据功能，SPI主机发送5个数据，并从从机读取5个数据，串口打印
日志，LED1每隔1s翻转一次。

Function descriptions:
This example demonstrates the SPI host interrupt sending and receiving data 
function, SPI host sends 5 pieces of data and reads 5 pieces of data from slave, 
printing through serial port Logs, LED1 flips every 1 second.
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测试环境：
测试用板：DPM32M087RBTx_EVB V1.0
MDK版本： 5.28

Test environment:
Test board: DPM32M087RBTx_EVB V1.0
MDK Version: 5.28
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使用步骤：
1. 接上P10上的跳线帽，将串口0引出到CH340，USB线接电脑。
2. 编译下载程序到MCU，并运行。
3. 串口0打印日志。
4. 可观察到开发板上的LED1每隔1s翻转一次。

Example execution steps:
1. Connect the jumper cap on P10, connect serial port 0 to CH340, and connect 
the USB cable to the computer.
2. Compile and download the program to MCU, and run it.
3. It can be observed that LED1 on the development board flips every 1 second.
4. Serial port 0 prints log "Uart printf example".
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注意事项：
LED引脚如下：
LED1       -> PC10

UART引脚如下：
UART0_Tx   -> PA9
UART0_Rx   -> PA10

SPI引脚如下：
SPI0_NSS   -> PA15
SPI0_CLK   -> PB3
SPI0_MSIO  -> PB4
SPI0_MOSI  -> PB5

Notes:
The LED pins are as follows:
LED1       -> PC10

The UART pins are as follows:
UART0-Tx   -> PA9
UART0-Rx   -> PA10

The SPI pins are as follows:
SPI0_NSS   -> PA15
SPI0_CLK   -> PB3
SPI0_MSIO  -> PB4
SPI0_MOSI  -> PB5
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