From b52fe53e3bd791419b99f48abaaf54f7e597bdb9 Mon Sep 17 00:00:00 2001
From: folkert van heusden <mail@vanheusden.com>
Date: Sun, 5 May 2024 02:45:37 +0200
Subject: [PATCH] ESP32: emulation heartbeat

---
 ESP32/console_esp32.cpp | 19 +++++++++++++++++--
 ESP32/esp32.h           |  3 +++
 ESP32/main.ino          | 13 ++++++++-----
 3 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/ESP32/console_esp32.cpp b/ESP32/console_esp32.cpp
index 1d99941..f63c22f 100644
--- a/ESP32/console_esp32.cpp
+++ b/ESP32/console_esp32.cpp
@@ -61,11 +61,11 @@ void console_esp32::refresh_virtual_terminal()
 
 void console_esp32::panel_update_thread()
 {
-#if !defined(BUILD_FOR_RP2040) && defined(NEOPIXELS_PIN)
 	Serial.println(F("panel task started"));
 
 	cpu *const c = b->getCpu();
 
+#if !defined(BUILD_FOR_RP2040) && defined(NEOPIXELS_PIN)
 	constexpr const uint8_t n_leds = 60;
 	Adafruit_NeoPixel pixels(n_leds, NEOPIXELS_PIN, NEO_RGBW);
 	pixels.begin();
@@ -142,7 +142,22 @@ void console_esp32::panel_update_thread()
 
 	pixels.clear();
 	pixels.show();
+#elif defined(HEARTBEAT_PIN)
+	uint64_t prev_count = 0;
+	bool     led_state  = true;
+
+	while(!stop_panel) {
+		vTaskDelay(333 / portTICK_PERIOD_MS);
+
+		uint64_t current_count = c->get_instructions_executed_count();
+		if (prev_count != current_count) {
+			prev_count = current_count;
+
+			digitalWrite(HEARTBEAT_PIN, led_state ? HIGH : LOW);
+			led_state = !led_state;
+		}
+	}
+#endif
 
 	Serial.println(F("panel task terminating"));
-#endif
 }
diff --git a/ESP32/esp32.h b/ESP32/esp32.h
index 39e0813..4aa43e1 100644
--- a/ESP32/esp32.h
+++ b/ESP32/esp32.h
@@ -15,5 +15,8 @@
 
 // #define NEOPIXELS_PIN 24
 
+#define HEARTBEAT_PIN LED_BUILTIN
+// #define HEARTBEAT_PIN 18
+
 // #define CONSOLE_SERIAL_RX 16
 // #define CONSOLE_SERIAL_TX 17
diff --git a/ESP32/main.ino b/ESP32/main.ino
index 172a5e8..c3703e6 100644
--- a/ESP32/main.ino
+++ b/ESP32/main.ino
@@ -343,7 +343,14 @@ void setup() {
 	tty_ = new tty(cnsl, b);
 	b->add_tty(tty_);
 
-#if !defined(BUILD_FOR_RP2040) && defined(NEOPIXELS_PIN)
+#if !defined(SHA2017)
+	pinMode(LED_BUILTIN, OUTPUT);
+#endif
+#if defined(HEARTBEAT_PIN)
+	pinMode(HEARTBEAT_PIN, OUTPUT);
+#endif
+
+#if !defined(BUILD_FOR_RP2040) && (defined(NEOPIXELS_PIN) || defined(HEARTBEAT_PIN))
 	Serial.println(F("Starting panel"));
 	xTaskCreate(&console_thread_wrapper_panel, "panel", 3072, cnsl, 1, nullptr);
 #endif
@@ -354,10 +361,6 @@ void setup() {
 	Serial.println(F(""));
 #endif
 
-#if !defined(SHA2017)
-	pinMode(LED_BUILTIN, OUTPUT);
-#endif
-
 	Serial.flush();
 
 	Serial.println(F("* Starting console"));