WIP: try to safe energy (deinit pio)

src/abfall.cpp

@@ -32,7 +32,7 @@ int main() {
 #endif
     printf("Firmware version: %s\n", PROJECT_VERSION);
 
-    WS2812 led(WS2812_PIN);
+    // WS2812 led(WS2812_PIN);
 
     wifi_enable(); // Enable Wifi in order to set time and retrieve data
 
@@ -96,6 +96,9 @@ int main() {
             while (currentTime < timestamp) {
                 size_t index = count % wasteDate.wasteTypes.size();
 
+                {
+                    WS2812 led(WS2812_PIN);
+
                     switch (wasteDate.wasteTypes.at(index)) {
                     case Waste::GelberSack:
                         led.switchColor(Color::YELLOW);
@@ -113,6 +116,7 @@ int main() {
                         led.switchColor(Color::GREEN);
                         break;
                     }
+                }
 
                 auto timeLeft = timestamp - currentTime;
 
@@ -127,7 +131,10 @@ int main() {
             }
 
         } else {
+            {
+                WS2812 led(WS2812_PIN);
                 led.blinkReady();
+            }
             sleep_until(static_cast<absolute_time_t>(timestamp));
         }
     }

src/ws2812.cpp

@@ -1,11 +1,13 @@
 #include "ws2812.h"
 
 WS2812::WS2812(uint gpio, PIO pio, uint sm) : m_pio{pio}, m_sm{sm} {
-    uint offset = pio_add_program(m_pio, &ws2812_program);
-    ws2812_program_init(m_pio, m_sm, offset, gpio, 800000, true);
+    m_offset = pio_add_program(m_pio, &ws2812_program);
+    ws2812_program_init(m_pio, m_sm, m_offset, gpio, 800000, true);
     switchColor(Color::OFF);
 }
 
+WS2812::~WS2812() { pio_remove_program(m_pio, &ws2812_program, m_offset); }
+
 void WS2812::switchColor(Color color) { putPixel(static_cast<uint32_t>(color)); }
 
 void WS2812::blinkReady() {

src/ws2812.h

@@ -17,6 +17,7 @@ enum class Color : uint32_t {
 class WS2812 {
   public:
     WS2812(uint gpio, PIO pio = pio0, uint sm = 0);
+    virtual ~WS2812();
     void switchColor(Color color);
     void blinkReady();
 
@@ -24,4 +25,5 @@ class WS2812 {
     void putPixel(uint32_t pixel_rgb);
     PIO m_pio;
     uint m_sm;
+    uint m_offset{0};
 };