Hallo, ich kommuniziere mit Chrome über die api an eine serielle
Schnittstelle, ansprechen will ich eine Relaiskarte
verbinden und disconnecten funktioniert, doch was muss ich senden.
4 bytes
1100 für init
3113 für relais 1 einschalten
Frage 1:) unten ist der Dataframe einmal in original, ist er richtig
übersetzt?
Frage 2:) Warum funktioniert das senden nicht?
Hat jemand Erfahrung?
is this the same command frame? use chrome.serial api relais card
Code:
1 | chrome.serial.connect("COM4", {bitrate: 19200}, onConnect);
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2 | connectionId = connectionInfo.connectionId;
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3 | output.textContent += " Databits: " + connectionInfo.dataBits;
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4 | output.textContent += " parityBit: " + connectionInfo.parityBit;
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5 | output.textContent += " stopBits: " + connectionInfo.stopBits;
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6 | output.textContent += " ctsFlowControl: " + connectionInfo.ctsFlowControl;
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7 | every thing perfect
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// diconnect
Code:
1 | chrome.serial.disconnect(connectionId, onDisconnect);
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DATAFRAME
1 | var buffer = new ArrayBuffer(3);
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2 | var uint8view = new Uint8Array(buffer);
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3 |
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4 | uint8view[0] = 1; /* commando for init is 1*/
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5 | uint8view[1] = 1; /* adress of card is 1*/
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6 | uint8view[2] = 0; /* data for init */
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7 | uint8view[3] = 0; /* checksum */
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8 |
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9 | // INIT END
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10 |
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11 | var buffer2 = new ArrayBuffer(3);
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12 | var uint8view2 = new Uint8Array(buffer2);
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13 |
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14 | uint8view2[0] = 3; /* commando for enable relais */
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15 | uint8view2[1] = 1; /* adress = 1*/
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16 | uint8view2[2] = 1; /* data */
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17 | uint8view2[3] = 3; /* checksum */
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18 |
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19 | chrome.serial.write(connectionId, buffer2, function() {});
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after that nothing is successfull and the next lines are not working.
original code
1 | Code:
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2 | Dim Send_buffer(0 To 3) As Byte
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3 |
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4 | Send_buffer(0) = Command_Byte 'Create command-frame
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5 | Send_buffer(1) = Address_Byte
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6 | Send_buffer(2) = Data_byte
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7 | Send_buffer(3) = Command_Byte Xor Address_Byte Xor Data_byte 'Calculate "checksum"
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8 |
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9 | TextBox.Text = ("CMD: " & Command_Byte.ToString & ", Adr: " & Address_Byte.ToString & ", Data_byte: " & Data_byte.ToString & ", CRC: " & Send_buffer(3).ToString)
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