61 lines
1.9 KiB
Swift
61 lines
1.9 KiB
Swift
import Foundation
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import SwiftSerial
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print("You should do a loopback i.e short the TX and RX pins of the target serial port before testing.")
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let testBinaryArray : [UInt8] = [0x11, 0x22, 0x33, 0x0D, 0x44]
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let arguments = CommandLine.arguments
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guard arguments.count >= 2 else {
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print("Need serial port name, e.g. /dev/ttyUSB0 or /dev/cu.usbserial as the first argument.")
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exit(1)
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}
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let portName = arguments[1]
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let serialPort: SerialPort = SerialPort(path: portName)
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do {
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print("Attempting to open port: \(portName)")
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try serialPort.openPort()
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print("Serial port \(portName) opened successfully.")
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defer {
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serialPort.closePort()
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print("Port Closed")
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}
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serialPort.setSettings(receiveRate: .baud9600,
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transmitRate: .baud9600,
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minimumBytesToRead: 1)
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print("Sending: ", terminator:"")
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print(testBinaryArray.map { String($0, radix: 16, uppercase: false) })
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let dataToSend: Data = Data(_: testBinaryArray)
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let bytesWritten = try serialPort.writeData(dataToSend)
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print("Successfully wrote \(bytesWritten) bytes")
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print("Waiting to receive what was written...")
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let dataReceived = try serialPort.readData(ofLength: bytesWritten)
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print("Received: ", terminator:"")
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print(dataReceived.map { String($0, radix: 16, uppercase: false) })
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if(dataToSend.elementsEqual(dataReceived)){
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print("Received data is the same as transmitted data. Test successful!")
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} else {
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print("Uh oh! Received data is not the same as what was transmitted. This was what we received,")
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print(dataReceived.map { String($0, radix: 16, uppercase: false) })
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}
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print("End of example");
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} catch PortError.failedToOpen {
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print("Serial port \(portName) failed to open. You might need root permissions.")
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} catch {
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print("Error: \(error)")
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}
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