log conversion results to .csv

gui/stmdsp.cpp

@@ -84,10 +84,26 @@ namespace stmdsp
 
     std::vector<adcsample_t> device::continuous_read() {
         if (connected()) {
-            m_serial.write("a");
+            m_serial.write("s");
-            std::vector<adcsample_t> data (2048);
+            unsigned char sizebytes[2];
-            m_serial.read(reinterpret_cast<uint8_t *>(data.data()), 2048 * sizeof(adcsample_t));
+            m_serial.read(sizebytes, 2);
-            return data;
+            unsigned int size = sizebytes[0] | (sizebytes[1] << 8);
+            if (size > 0) {
+                std::vector<adcsample_t> data (size);
+                unsigned int total = size * sizeof(adcsample_t);
+                unsigned int offset = 0;
+
+                while (total > 512) {
+                    m_serial.read(reinterpret_cast<uint8_t *>(&data[0]) + offset, 512);
+                    m_serial.write("n");
+                    offset += 512;
+                    total -= 512;
+                }
+                m_serial.read(reinterpret_cast<uint8_t *>(&data[0]) + offset, total);
+                m_serial.write("n");
+                return data;
+
+            }
         }
 
         return {};

gui/wxmain.cpp

@@ -143,7 +143,24 @@ void MainFrame::onCloseEvent(wxCloseEvent& event)
 
 void MainFrame::onMeasureTimer([[maybe_unused]] wxTimerEvent&)
 {
-    if (m_status_bar && m_device) {
+    if (m_conv_result_log != nullptr) {
+        static unsigned int counter = 0;
+        if (auto samples = m_device->continuous_read(); samples.size() > 0) {
+            for (auto& s : samples) {
+                auto str = wxString::Format("%u\n", s);
+                m_conv_result_log->Write(str.ToAscii(), str.Len());
+            }
+
+            counter++;
+        }
+
+        //if (counter == 20) {
+        //    m_conv_result_log->Close();
+        //    delete m_conv_result_log;
+        //    m_conv_result_log = nullptr;
+        //    counter = 0;
+        //}
+    } else if (m_status_bar && m_device) {
         m_status_bar->SetStatusText(wxString::Format(wxT("Execution time: %u cycles"),
                                                      m_device->continuous_start_get_measurement()));
     }
@@ -392,11 +409,18 @@ void MainFrame::onRunStart(wxCommandEvent& ce)
 
     if (!m_is_running) {
         if (m_device != nullptr && m_device->connected()) {
+            if (m_conv_result_log != nullptr) {
+                m_conv_result_log->Close();
+                delete m_conv_result_log;
+            }
+            m_conv_result_log = new wxFileOutputStream("results.csv");
+
             if (m_run_measure && m_run_measure->IsChecked()) {
                 m_device->continuous_start_measure();
                 m_measure_timer->StartOnce(1000);
             } else {
                 m_device->continuous_start();
+                m_measure_timer->Start(15);
             }
 
             menuItem->SetItemLabel("&Stop");
@@ -407,6 +431,11 @@ void MainFrame::onRunStart(wxCommandEvent& ce)
             m_status_bar->SetStatusText("Please connect.");
         }
     } else {
+        if (m_conv_result_log != nullptr) {
+            m_conv_result_log->Close();
+            delete m_conv_result_log;
+            m_conv_result_log = nullptr;
+        }
         m_device->continuous_stop();
 
         menuItem->SetItemLabel("&Start");

gui/wxmain.hpp

@@ -56,6 +56,7 @@ private:
     wxTimer *m_measure_timer = nullptr;
     wxStatusBar *m_status_bar = nullptr;
     wxMenuBar *m_menu_bar = nullptr;
+    wxFileOutputStream *m_conv_result_log = nullptr;
     wxString m_open_file_path;
     wxString m_temp_file_name;
 

source/main.cpp

@@ -21,7 +21,7 @@
 
 constexpr unsigned int MAX_ELF_FILE_SIZE = 8 * 1024;
 constexpr unsigned int MAX_ERROR_QUEUE_SIZE = 8;
-constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 6000;
+constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 6000; // operate on buffers size this / 2
 constexpr unsigned int MAX_SIGGEN_BUFFER_SIZE = 3000;
 
 enum class RunStatus : char
@@ -78,6 +78,7 @@ static std::array<adcsample_t, CACHE_SIZE_ALIGN(adcsample_t, MAX_SAMPLE_BUFFER_S
 CC_ALIGN(CACHE_LINE_SIZE)
 #endif
 static std::array<dacsample_t, CACHE_SIZE_ALIGN(dacsample_t, MAX_SAMPLE_BUFFER_SIZE)> dac_samples;
+static volatile const dacsample_t *dac_samples_new = nullptr;
 #if CACHE_LINE_SIZE > 0
 CC_ALIGN(CACHE_LINE_SIZE)
 #endif
@@ -265,7 +266,29 @@ void main_loop()
                     break;
 
                 case 's':
-                    usbserial::write(dac_samples.data(), dac_sample_count * sizeof(dacsample_t));
+                    if (dac_samples_new != nullptr) {
+                        unsigned char buf[2] = {
+                            static_cast<unsigned char>(dac_sample_count / 2 & 0xFF),
+                            static_cast<unsigned char>(((dac_sample_count / 2) >> 8) & 0xFF)
+                        };
+                        usbserial::write(buf, 2);
+                        unsigned int total = dac_sample_count / 2 * sizeof(dacsample_t);
+                        unsigned int offset = 0;
+                        unsigned char unused;
+                        auto samps = reinterpret_cast<const uint8_t *>(
+                            const_cast<const dacsample_t *>(dac_samples_new));
+                        while (total > 512) {
+                            usbserial::write(samps + offset, 512);
+                            while (usbserial::read(&unused, 1) == 0);
+                            offset += 512;
+                            total -= 512;
+                        }
+                        usbserial::write(samps + offset, total);
+                        while (usbserial::read(&unused, 1) == 0);
+                        dac_samples_new = nullptr;
+                    } else {
+                        usbserial::write("\0\0", 2);
+                    }
                     break;
 
                 case 'W':
@@ -281,7 +304,7 @@ void main_loop()
             }
         }
 
-		chThdSleepMilliseconds(1);
+		chThdSleepMicroseconds(100);
 	}
 }
 
@@ -308,12 +331,14 @@ THD_FUNCTION(conversionThread, arg)
                 if (!samples)
                     samples = &adc_samples[0];
                 std::copy(samples, samples + halfsize, &dac_samples[0]);
+                dac_samples_new = &dac_samples[0];
             } else if (message == MSG_CONVSECOND) {
                 if (elf_entry)
                     samples = elf_entry(&adc_samples[halfsize], halfsize);
                 if (!samples)
                     samples = &adc_samples[halfsize];
                 std::copy(samples, samples + halfsize, &dac_samples[dac_sample_count / 2]);
+                dac_samples_new = &dac_samples[dac_sample_count / 2];
             } else if (message == MSG_CONVFIRST_MEASURE) {
                 chTMStartMeasurementX(&conversion_time_measurement);
                 if (elf_entry)
@@ -322,6 +347,7 @@ THD_FUNCTION(conversionThread, arg)
                 if (!samples)
                     samples = &adc_samples[0];
                 std::copy(samples, samples + halfsize, &dac_samples[0]);
+                dac_samples_new = &dac_samples[0];
             } else if (message == MSG_CONVSECOND_MEASURE) {
                 chTMStartMeasurementX(&conversion_time_measurement);
                 if (elf_entry)
@@ -330,6 +356,7 @@ THD_FUNCTION(conversionThread, arg)
                 if (!samples)
                     samples = &adc_samples[halfsize];
                 std::copy(samples, samples + halfsize, &dac_samples[dac_sample_count / 2]);
+                dac_samples_new = &dac_samples[dac_sample_count / 2];
             }
         }
     }