Tommy：Refactor: add Category:Connectivity

2026-08-21T05:17:45Z

Refactor: add [[Category:Connectivity ]]

←上個修訂		2026年8月21日 (五) 13:17的版本
第74行：		第74行：
	== Reference ==		== Reference ==
	* [https://developer.mbed.org/handbook/CAN, ARMmbed CAN]		* [https://developer.mbed.org/handbook/CAN, ARMmbed CAN]

			[[Category:Connectivity]]

Tommy：已建立頁面，內容為 "== CAN TRANSCEIVER Module - SN65HVD251 == CAN TRANSCEIVER Module File:CAN_TRANSCEIVER_Module_01.jpg|CAN TRANSCEIVE…"

2018-08-23T02:16:01Z

已建立頁面，內容為 "== CAN TRANSCEIVER Module - SN65HVD251 == border|350px|CAN TRANSCEIVER Module File:CAN_TRANSCEIVER_Module_01.jpg|CAN TRANSCEIVE…"

新頁面

== CAN TRANSCEIVER Module - SN65HVD251 ==
[[File:CAN_TRANSCEIVER_Module.jpg|border|350px|CAN TRANSCEIVER Module]]
[[File:CAN_TRANSCEIVER_Module_01.jpg|CAN TRANSCEIVER Module]]

== Setup CAN bus ==
* loops the data between the mbed LPC1768's two CAN buses.
[[File:Can.jpg|border|350px|CAN bus + LPC1768]]
[[File:CAN_self_test.png|border|350px|CAN bus looping]]

== Code ==
<pre>
#include "mbed.h"
#include "CAN.h"

Ticker ticker;
DigitalOut led1(LED1);
DigitalOut led2(LED2);
CAN can1(p9, p10);
CAN can2(p30, p29);
Serial pc(USBTX, USBRX);
char counter = 0;

void send() {
//pc.printf("send()\n");
if(can1.write(CANMessage(1337, &counter, 1))) {
//pc.printf("wloop()\n");
counter++;
//pc.printf("Message sent: %d\n", counter);
}
led1 = !led1;
}

int main() {
pc.printf("main()\n");
ticker.attach(&send, 1);
CANMessage msg;
while(1) {
//pc.printf("loop()\n");
if(can2.read(msg)) {
pc.printf("Message received: %4d\n\r", msg.data[0]);
led2 = !led2;
}
wait(0.2);
}
}

</pre>

== Result ==
* stty -F /dev/ttyACM0 speed 9600 -crtscts cs8 -cstopb -parenb -icrnl
* cat < /dev/ttyACM0
<pre>
The following will using CAN bus to send counting message from 0 to 255 and repeat again:
...
Message received: 246
Message received: 247
Message received: 248
Message received: 249
Message received: 250
Message received: 251
Message received: 252
Message received: 253
Message received: 254
Message received: 255
Message received: 0
Message received: 1
Message received: 2
Message received: 3
Message received: 4
Message received: 5
...
</pre>

== Reference ==
* [https://developer.mbed.org/handbook/CAN, ARMmbed CAN]

CAN bus - 修訂紀錄

Tommy：​Refactor: add Category:Connectivity

Tommy：​已建立頁面，內容為 "== CAN TRANSCEIVER Module - SN65HVD251 == CAN TRANSCEIVER Module File:CAN_TRANSCEIVER_Module_01.jpg|CAN TRANSCEIVE…"

Tommy：Refactor: add Category:Connectivity

Tommy：已建立頁面，內容為 "== CAN TRANSCEIVER Module - SN65HVD251 == CAN TRANSCEIVER Module File:CAN_TRANSCEIVER_Module_01.jpg|CAN TRANSCEIVE…"