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Code Issues 1 Packages Projects Releases Wiki Activity

Printer: Implement flow control

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Also make the print activity scrollable for dealing with long images.
This commit is contained in:
Daniele Gobbetti
2025-07-06 18:08:46 +02:00
committed by daniele
parent 0af011c929
commit c03b229563
2 changed files with 31 additions and 1 deletions
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app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/thermalprinter/GenericThermalPrinterSupport.java
+15 -1
View File
@@ -182,7 +182,7 @@ public class GenericThermalPrinterSupport extends AbstractBTLESingleDeviceSuppor
final int cmdId = data.get();
PrinterCommand command = PrinterCommand.fromId(cmdId);
if (command == null) {
LOG.error("Unkwnown incoming command{} in message: {}", cmdId, GB.hexdump(data.array()));
LOG.error("Unknown incoming command{} in message: {}", cmdId, GB.hexdump(data.array()));
return true;
}
int response = data.get();
@@ -211,6 +211,19 @@ public class GenericThermalPrinterSupport extends AbstractBTLESingleDeviceSuppor
LOG.debug("Incoming message: {}", GB.hexdump(data.array()));
final ByteBuffer payloadBB = ByteBuffer.wrap(payload);
switch (command) {
case flowControl:
//5178AE010100 10 70FF -> buffer full
//5178AE010100 00 00FF -> buffer empty
final int code = payloadBB.get();
if (code == 0x10) {
LOG.info("Printer buffer is full, will stop the queue");
getQueue().setPaused(true);
} else if (code == 0x00) {
LOG.info("Printer buffer is empty, will resume the queue");
getQueue().setPaused(false);
}
break;
case getDevInfo:
if (payloadBB.get() != 0) {
LOG.info("Setting the device supports Run Length Encoding");
@@ -358,6 +371,7 @@ public class GenericThermalPrinterSupport extends AbstractBTLESingleDeviceSuppor
quality(0xa4),
printHeadSetup(0xa6), //possibly
getDevInfo(0xa8),
flowControl(0xae),
intensity(0xaf),
printSpeed(0xbd),
printType(0xbe),
app/src/main/res/layout/activity_print_image.xml
+16
View File
@@ -4,7 +4,19 @@
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Wrap the content with a ScrollView -->
<ScrollView
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/sendToPrinterButton"
android:layout_width="0dp"
@@ -63,4 +75,8 @@
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/incomingImage" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>