默认初始化选用 4M MSBFIRST SPI_MODE0 其他初始化方式 setup()函数中调用SPI.begin()初始化SPI接口。此处为默认设置。若要设置具体参数可使用如下语句初始化SPI. 1SPI.beginTransaction(SPISettings(14000000, MSBFIRST, SPI_MODE0)); SPISettings()函数设置SPI传输模式,SPI.beginTransaction()函数根据SPISettings()...
SPI_MODE3 1个 1个 坠落 升起Mode 0 CPOL=0, CPHA=0 Mode 1 CPOL=0, CPHA=1 Mode 2 CPOL=1, CPHA=0 Mode 3 CPOL=1, CPHA=1从设备也是一个SPI控制器,4种模式都支持,此时只要自己设置为某种模式即可。 然后知道了从设备的模式后,再去将SPI主设备的模式,设置为和从设备模式一样,即可。
SPI.setDataMode(mode) 参数mode: SPI_MODE0(上升沿采样,下降沿置位,SCK闲置时为0), SPI_MODE1(上升沿置位,下降沿采样,SCK闲置时为0), SPI_MODE2(下降沿采样,上升沿置位,SCK闲置时为1), SPI_MODE3(下降沿置位,上升沿采样,SCK闲置时为1)。
MSBFIRST,SPI_MODE0));// Send and receive data byteuint8_t receivedData=SPI.transfer(sendData);// End SPI transactionSPI.endTransaction();// Return the received data bytereturnreceivedData;}
dataMode: SPI_MODE0, SPI_MODE1, SPI_MODE2, or SPI_MODE3四种数据传送模式 ReturnsNone返回 begin()初始化SPI总线的参数 Description Initializes the SPI bus by setting SCK, MOSI, and SS to outputs, pulling SCK and MOSI low, and SS high. ...
5.setDataMode() 该功能用于设置数据模式。 语法:SPI.setDataMode(mode) 参数: mode,可配置的模式,包括: ~ SPI_MODE0; ~ SPI_MODE1; ...
https://www.xpstem.com/article/10431 主设备程序: #include<SPI.h>voidsetup(){Serial.begin(9600);//初始化串口波特率digitalWrite(SS,HIGH);// 禁用从设备HIGH为禁用SPI.beginTransaction(SPISettings(14000000,MSBFIRST,SPI_MODE0));}voidloop(){char c;digitalWrite(SS,LOW);//启用从设备// 发送测试的...
setFrequency(SPI_FREQUENCY); #else pinMode(NORFLASH_CLK_PIN, OUTPUT); pinMode(NORFLASH_MOSI_PIN, OUTPUT); pinMode(NORFLASH_MISO_PIN, INPUT); digitalWrite(NORFLASH_CLK_PIN, LOW); delay(1); #endif // check write enable status uint8_t data = 0; write_enable(); data = read_status(...
However if we simply intialise two instance of the SPI class for both of these buses both can be used. However when just using these the Arduino way only will actually be outputting at a time. Logic analyser capture is in the same folder as this example as ...
实测中确实是这样,在 A6、A7 引脚上,想运行 Blink 例程,使用 pinMode(A6, OUTPUT),digitalWrite(A6, HIGH) 都不会得到你所需要的效果。更崩溃的是,你可能改变了芯片内部你原本不想改变的寄存器配置,没准会有诡异意外发生。玩 Nano,或者是贴片AVR的 Arduino 朋友们,可要注意。