MENG XI Posted March 10, 2021 Report Share Posted March 10, 2021 SPI is a highly important peripheral for microcontroller as it allows for high speed communication over short range, here is how we use python to send msg to another microcontroller over SPI 材料准备 Ameba x 1, Arduino UNO x 1 范例说明 SPI是一种快速且强大的通讯协议,并通常在微处理器中被用来接受传感器的数据或输出图像讯号。在这个示例中将示范ameba如何透过MicroPython以从属模式接收数据。 在通讯连接建立之前,需要先将以下代码烧录到Arduino UNO。 rtc = RTC() /////////////////////// // SPI Master Write // /////////////////////// #include void setup (void) { Serial.begin(115200); //set baud rate to 115200 for usart digitalWrite(SS, HIGH); // disable Slave Select SPI.begin (); } void loop (void) { char c; digitalWrite(SS, LOW); // enable Slave Select // send test string for (const char * p = "Hello, world!\r" ; c = *p; p++) { SPI.transfer(c); Serial.print(c); } Serial.println(); digitalWrite(SS, HIGH); // disable Slave Select delay(2000); } Arduino UNO将以如下图所示的连接方式和Ameba连接,我们使用第“0”组SPI作为从机, 并将Arduino UNO当作SPI的主机。 然后复制以下代码并粘贴到REPL的粘贴模式窗口,并等待代码生效。 from machine import SPI s1= SPI(0 , mode = SPI.SLAVE) for i in range(14): chr(s1.read()) Quote Link to comment Share on other sites More sharing options...
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