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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/common.js"></script>
<script src="resources/manual.js"></script>
</head>
<body>
<p>
These tests require a connected serial device configured to act as a
"loopback" device, with the TX and RX pins and RTS and CTS pins wired
together.
</p>
<script>
manual_serial_test(async (t, port) => {
await port.open({
baudRate: 115200,
bufferSize: 255,
flowControl: 'none'
});
t.add_cleanup(async () => {
await port.close();
});
await port.setSignals({ requestToSend: true });
let signals = await port.getSignals();
assert_true(signals.clearToSend);
await port.setSignals({ requestToSend: false });
signals = await port.getSignals();
assert_false(signals.clearToSend);
}, 'Manual RTS control works with no flow control enabled');
manual_serial_test(async (t, port) => {
await port.open({
baudRate: 115200,
bufferSize: 255,
flowControl: 'hardware'
});
const writer = port.writable.getWriter();
t.add_cleanup(async () => {
writer.releaseLock();
await port.close();
});
assert_true((await port.getSignals()).clearToSend);
const buffer = new Uint8Array(1);
while ((await port.getSignals()).clearToSend) {
await writer.write(buffer);
}
}, 'Hardware flow control automatically sets RTS pin');
</script>
</body>
</html>