86 lines
2.5 KiB
Swift
86 lines
2.5 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 testString: String = "The quick brown fox jumps over the lazy dog 01234567890."
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let numberOfMultiNewLineTest : Int = 5
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let test3Strings: String = testString + "\n" + testString + "\n" + testString + "\n"
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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("Writing test string <\(testString)> of \(testString.count) characters to serial port")
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let bytesWritten = try serialPort.writeString(testString)
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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 stringReceived = try serialPort.readString(ofLength: bytesWritten)
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if testString == stringReceived {
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print("Received string is the same as transmitted string. Test successful!")
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} else {
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print("Uh oh! Received string is not the same as what was transmitted. This was what we received,")
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print("<\(stringReceived)>")
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}
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print("Now testing reading/writing of \(numberOfMultiNewLineTest) lines")
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var multiLineString: String = ""
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for _ in 1...numberOfMultiNewLineTest {
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multiLineString += testString + "\n"
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}
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print("Now writing multiLineString")
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var _ = try serialPort.writeString(multiLineString)
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for i in 1...numberOfMultiNewLineTest {
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let stringReceived = try serialPort.readLine()
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if testString == stringReceived {
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print("Received string \(i) is the same as transmitted section. Moving on...")
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} else {
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print("Uh oh! Received string \(i) is not the same as what was transmitted. This was what we received,")
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print("<\(stringReceived)>")
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break
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}
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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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