timestamps in output / reduced panel screenrate

ESP32/console_esp32.cpp

@@ -108,7 +108,7 @@ void console_esp32::panel_update_thread()
 	pixels.show();
 
 	while(!stop_panel) {
-		vTaskDelay(20 / portTICK_PERIOD_MS);
+		vTaskDelay(100 / portTICK_PERIOD_MS);
 
 		try {
 			// note that these are approximately as there's no mutex on the emulation

console.cpp

@@ -290,6 +290,21 @@ void console::put_char(const char c)
 			debug_buffer.clear();
 		}
 
+		if (timestamps) {
+			char     buffer[32] { };
+			uint64_t timestamp = get_us() - start_ts;
+			uint64_t seconds   = timestamp / 1000000;
+
+			int len = snprintf(buffer, sizeof buffer, "%02d:%02d:%02d.%06d ",
+					int(seconds / 3600),
+					int((seconds / 60) % 60),
+					int(seconds % 60),
+					int(timestamp % 1000000));
+
+			for(int i=0; i<len; i++)
+				put_char_ll(buffer[i]);
+		}
+
 		ty++;
 	}
 	else if (c == 8) {  // backspace

console.h

@@ -10,6 +10,8 @@
 #include <thread>
 #include <vector>
 
+#include "utils.h"
+
 #if defined(_WIN32)
 #include "win32.h"
 #endif
@@ -48,6 +50,8 @@ protected:
 	char                   *screen_buffer    { nullptr };
 	uint8_t                 tx               { 0 };
 	uint8_t                 ty               { 0 };
+	std::atomic_bool        timestamps       { false };
+	const uint64_t          start_ts         { get_us() };
 
 	const size_t            n_edit_lines_hist { 8 };  // maximum number of previous edit-lines
 	std::vector<std::string> edit_lines_hist;
@@ -75,6 +79,8 @@ public:
 	std::string  read_line(const std::string & prompt);
 	void         flush_input();
 
+	void         enable_timestamp(const bool state) { timestamps = state; }
+
 	void         emit_backspace();
 	void         put_char(const char c);
 	void         put_string(const std::string & what);

debugger.cpp

@@ -1082,6 +1082,11 @@ void debugger(console *const cnsl, bus *const b, std::atomic_uint32_t *const sto
 
 				continue;
 			}
+			else if (parts[0] == "pts" && parts.size() == 2) {
+				cnsl->enable_timestamp(std::stoi(parts[1]));
+
+				continue;
+			}
 			else if (cmd == "qi") {
 				show_queued_interrupts(cnsl, c);
 
@@ -1183,6 +1188,7 @@ void debugger(console *const cnsl, bus *const b, std::atomic_uint32_t *const sto
 					"trace/t       - toggle tracing",
 					"setll x,y     - set loglevel: terminal,file",
 					"setsl x,y     - set syslog target: requires a hostname and a loglevel",
+					"pts x         - enable (1) / disable (0) timestamps",
 					"turbo         - toggle turbo mode (cannot be interrupted)",
 					"debug         - enable CPU debug mode",
 					"bt            - show backtrace - need to enable debug first",