Add a trace mode for usb tracing

meson.build

@@ -35,6 +35,15 @@ incdir = include_directories('src')
 
 subdir('src')
 
+# Build arguments
+cpp_args = ['-DPROJ_VERSION="' + meson.project_version() + '"']
+
+# USB trace mode option (for debugging without sending to hardware)
+if get_option('usb_trace_only')
+    cpp_args += ['-DUSB_TRACE_ONLY']
+    message('USB_TRACE_ONLY enabled: USB data will be logged but not sent to device')
+endif
+
 ptprnt_exe = executable(
     'ptprnt',
     'src/main.cpp',
@@ -42,7 +51,7 @@ ptprnt_exe = executable(
     dependencies: [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
     include_directories: incdir,
     sources: [ptprnt_srcs],
-    cpp_args: ['-DPROJ_VERSION="' + meson.project_version() + '"'],
+    cpp_args: cpp_args,
 )
 
 

src/PtouchPrint.cpp

@@ -55,7 +55,10 @@ int PtouchPrint::init(int argc, char** argv) {
         return -1;
     }
 
-    if (mVerboseFlag) {
+    // Set log level based on flags
+    if (mTraceFlag) {
+        setupLogger(spdlog::level::trace);
+    } else if (mVerboseFlag) {
         setupLogger(spdlog::level::debug);
     } else {
         setupLogger(spdlog::level::warn);
@@ -263,6 +266,7 @@ void PtouchPrint::setupCliParser() {
 
     // General options
     mApp.add_flag("-v,--verbose", mVerboseFlag, "Enable verbose output");
+    mApp.add_flag("--trace", mTraceFlag, "Enable trace output (shows USB communication)");
     mApp.add_flag("-V,--version", printVersion, "Prints the ptprnt's version");
 
     // Printer selection

src/PtouchPrint.hpp

@@ -60,6 +60,7 @@ class PtouchPrint {
 
     // CLI flags and options
     bool mVerboseFlag = false;
+    bool mTraceFlag = false;
     std::string mPrinterSelection = "auto";
     bool mListDriversFlag = false;
 };

src/printers/P700Printer.cpp

@@ -127,42 +127,42 @@ bool P700Printer::printBitmap(const graphics::Bitmap<graphics::ALPHA8>& bitmap)
 }
 
 bool P700Printer::printMonochromeData(const graphics::MonochromeData& data) {
+    // Send initialization sequence
+    send(p700::commands::INITIALIZE);
+    // Status is already queried in getPrinterStatus()
+    send(p700::commands::PRINT_MODE);
+    send(p700::commands::AUTO_STATUS);
+    send(p700::commands::MODE_SETTING);
 
-    send(p700::commands::RASTER_START);
+    // Send raster data row by row
-    std::vector<uint8_t> rastercmd(4);
+    for (uint32_t row = 0; row < data.height; row++) {
-    rastercmd[0] = 0x47;
+        std::vector<uint8_t> rowData;
-    rastercmd[1] = 0x00;  // size +1
-    rastercmd[2] = 0x00;
-    rastercmd[3] = 0x00;  // size -1
 
-    // Process data column by column for the printer
+        // Extract row data byte by byte
-    for (uint32_t col = 0; col < data.width; col++) {
+        for (uint32_t col = 0; col < data.width; col += 8) {
-        std::vector<uint8_t> columnData;
-
-        // Extract column data bit by bit
-        for (uint32_t row = 0; row < data.height; row += 8) {
             uint8_t byte = 0;
-            for (int bit = 0; bit < 8 && (row + bit) < data.height; bit++) {
+            for (int bit = 0; bit < 8 && (col + bit) < data.width; bit++) {
-                if (data.getBit(col, row + bit)) {
+                if (data.getBit(col + bit, row)) {
                     byte |= (1 << (7 - bit));
                 }
             }
-            columnData.push_back(byte);
+            rowData.push_back(byte);
         }
 
+        // Build raster line command: G + length_high + 0x00 + length_low + data
         std::vector<uint8_t> buf;
-        buf.insert(buf.begin(), rastercmd.begin(), rastercmd.end());
+        buf.push_back(0x47);                         // 'G' command
-        buf.insert(std::next(buf.begin(), 4), columnData.begin(), columnData.end());
+        buf.push_back((rowData.size() + 1) & 0xFF);  // length + 1 (low byte)
-        buf[1] = columnData.size() + 1;
+        buf.push_back(0x00);                         // high byte (always 0 for our data size)
-        buf[3] = columnData.size() - 1;
+        buf.push_back((rowData.size() - 1) & 0xFF);  // length - 1
+        buf.insert(buf.end(), rowData.begin(), rowData.end());
 
         if (!send(buf)) {
-            spdlog::error("Error sending buffer to printer");
+            spdlog::error("Error sending raster line {} to printer", row);
-            break;
+            return false;
         }
     }
 
-    send(p700::commands::EJECT);
     return true;
 }
 
@@ -178,7 +178,8 @@ bool P700Printer::printLabel(std::unique_ptr<graphics::ILabel> label) {
     // Transform to portrait orientation for printing
     monoData.transformTo(graphics::Orientation::PORTRAIT);
 
-    spdlog::debug("Label surface is {}x{}, transformed to portrait", label->getWidth(), label->getHeight());
+    spdlog::debug("Label surface was {}x{}, after transform to portrait: {}x{}", label->getWidth(), label->getHeight(),
+                  monoData.width, monoData.height);
 
     return printMonochromeData(monoData);
 }
@@ -197,6 +198,11 @@ bool P700Printer::send(const std::vector<uint8_t>& data) {
         return false;
     }
 
+    spdlog::trace("USB Tx → 0x02 {:03d} bytes: {:Xn}", data.size(), spdlog::to_hex(data));
+#ifdef USB_TRACE_ONLY
+    // Trace mode: Log the data that would be sent without actually sending it
+    return true;
+#else
     int tx = 0;
 
     if (!mUsbHndl->bulkTransfer(0x02, data, &tx, 0)) {
@@ -211,6 +217,7 @@ bool P700Printer::send(const std::vector<uint8_t>& data) {
     }
 
     return true;
+#endif
 }
 
 bool P700Printer::init() {

src/printers/P700Printer.hpp

@@ -32,7 +32,11 @@
 
 namespace ptprnt::printer {
 namespace p700::commands {
-const cmd_T GET_STATUS{0x1b, 0x69, 0x53};
+const cmd_T INITIALIZE{0x1b, 0x40};          // ESC @ - Initialize
+const cmd_T GET_STATUS{0x1b, 0x69, 0x53};    // ESC i S - Status query
+const cmd_T PRINT_MODE{0x4d, 0x02};          // M 0x02 - Print mode
+const cmd_T AUTO_STATUS{0x1b, 0x69, 0x61, 0x01};  // ESC i a - Auto status
+const cmd_T MODE_SETTING{0x1b, 0x69, 0x4d, 0x40}; // ESC i M @ - Advanced mode
 const cmd_T RASTER_START{0x1b, 0x69, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 const cmd_T INFO{0x1b, 0x69, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 const cmd_T PACKBITSON{0x02};