добавлена проверка - не превышает ли номер вывода из аргумента функции общее кол-во выводов

libraries/NeoPixel/src/NeoPixel.cpp

@@ -19,7 +19,13 @@ NeoPixel::~NeoPixel() {
 }
 
 void NeoPixel::begin(void) {
-  if (pin >= 0) {
+  if (pin >= 0) 
+  {
+    if (pin >= pinCommonQty())
+    {
+      ErrorMsgHandler("NeoPixel.begin(): pin number exceeds the total number of pins");
+      return;
+    }
     pinMode(pin, OUTPUT);
     digitalWrite(pin, LOW);
   }
@@ -58,59 +64,62 @@ void NeoPixel::updateType(neoPixelType t) {
 static void __attribute__((noinline, section(".ram_text"))) mik32Show(GPIO_TypeDef* m_port, uint32_t m_pin, uint8_t* pixels, uint32_t numBytes, bool is800KHz) {
   // not support 400khz
   if (!is800KHz) return;
-
-  volatile uint32_t* set = &m_port->SET;
-  volatile uint32_t* clr = &m_port->CLEAR;
-
-  uint8_t* ptr = pixels;
-  uint8_t* end = ptr + numBytes;
-  uint8_t p = *ptr++;
-  uint8_t bitMask = 0x80;
- 
-  noInterrupts();
   
-  while (1) {
-    if (p & bitMask) { // ONE
-      // High 800ns - 25,6 tick
-      *set = m_pin;
-      __asm volatile (
-        "nop; nop; nop; nop; nop; nop; nop; nop;"
-        "nop; nop; nop; nop; nop; nop; nop; nop;"
-        "nop; nop; nop; nop;"
-      );
+  if ((m_port != NULL) && (m_pin != NC))
+  {
+    volatile uint32_t* set = &m_port->SET;
+    volatile uint32_t* clr = &m_port->CLEAR;
 
-      // Low 450ns - 14,4 tick
-      *clr = m_pin;
-      __asm volatile (
-        "nop; nop; nop; nop; nop;"
-      );
-    } else {   // ZERO
-      // High 400ns - 12,8 tick
-      *set = m_pin;
-      __asm volatile (
-        "nop; nop; nop; nop; nop; nop;"
-      );
+    uint8_t* ptr = pixels;
+    uint8_t* end = ptr + numBytes;
+    uint8_t p = *ptr++;
+    uint8_t bitMask = 0x80;
+  
+    noInterrupts();
+    
+    while (1) {
+      if (p & bitMask) { // ONE
+        // High 800ns - 25,6 tick
+        *set = m_pin;
+        __asm volatile (
+          "nop; nop; nop; nop; nop; nop; nop; nop;"
+          "nop; nop; nop; nop; nop; nop; nop; nop;"
+          "nop; nop; nop; nop;"
+        );
 
-      // Low 850ns - 27,2 tick
-      *clr = m_pin;
-      __asm volatile (
-        "nop; nop; nop; nop; nop; nop; nop; nop;"
-        "nop; nop; nop;"
-      );
-    }
+        // Low 450ns - 14,4 tick
+        *clr = m_pin;
+        __asm volatile (
+          "nop; nop; nop; nop; nop;"
+        );
+      } else {   // ZERO
+        // High 400ns - 12,8 tick
+        *set = m_pin;
+        __asm volatile (
+          "nop; nop; nop; nop; nop; nop;"
+        );
 
-    if (bitMask >>= 1) {
-      // Move on to the next pixel
-    }
-    else {
-      if (ptr >= end) {
-        break;
+        // Low 850ns - 27,2 tick
+        *clr = m_pin;
+        __asm volatile (
+          "nop; nop; nop; nop; nop; nop; nop; nop;"
+          "nop; nop; nop;"
+        );
+      }
+
+      if (bitMask >>= 1) {
+        // Move on to the next pixel
+      }
+      else {
+        if (ptr >= end) {
+          break;
+        }
+        p = *ptr++;
+        bitMask = 0x80;
       }
-      p = *ptr++;
-      bitMask = 0x80;
     }
+    interrupts();
   }
-  interrupts();
 }
 
 void NeoPixel::show(void) {