Merge pull request #407 from tineira/master

Arduino Giga support Issue #349

Author: ladyada

.github/workflows/githubci.yml

@@ -20,7 +20,7 @@ jobs:
       run: bash ci/actions_install.sh
 
     - name: test platforms
-      run: python3 ci/build_platform.py main_platforms
+      run: python3 ci/build_platform.py main_platforms giga
 
     - name: doxygen
       env:

Adafruit_NeoPixel.cpp

@@ -1844,9 +1844,69 @@ void Adafruit_NeoPixel::show(void) {
 
 #elif defined(__arm__)
 
+#if defined(TARGET_GIGA) || defined(TARGET_M4)
+  // Arduino GIGA -----------------------------------------------------------
+  uint8_t *p = pixels, *end = p + numBytes, pix;
+  while (p < end)
+  {
+    pix = *p++;
+    for (int i = 7; i >= 0; i--)
+    {
+      // gpio_write(&gpio->gpio, 1);
+      gpio->write(1);
+
+      // duty cycle determines bit value
+      // if (pix & 0x80)
+      if (bitRead(pix, i) == 0)
+      {
+        // one
+        // wait_ns(400); -> 192 cycles
+#if defined(TARGET_GIGA)
+        for (int j = 0; j < 96; j++)
+#else
+        for (int j = 0; j < 48; j++)
+#endif
+          __NOP();
+
+        // gpio_write(&gpio->gpio, 0);
+        gpio->write(0);
+
+        // wait_ns(850) -> 408 cycles
+#if defined(TARGET_GIGA)
+        for (int j = 0; j < 204; j++)
+#else
+        for (int j = 0; j < 102; j++)
+#endif
+          __NOP();
+      }
+      else
+      {
+        // zero
+        // wait_ns(800) -> 384 cycles
+#if defined(TARGET_GIGA)
+        for (int j = 0; j < 192; j++)
+#else
+        for (int j = 0; j < 96; j++)
+#endif
+          __NOP();
+
+        gpio->write(0);
+        // gpio_write(&gpio->gpio, 0);
+        // wait_ns(450) -> 216 cycles
+#if defined(TARGET_GIGA)
+        for (int j = 0; j < 108; j++)
+#else
+        for (int j = 0; j < 54; j++)
+#endif
+          __NOP();
+      }
+
+      // pix = pix << 1; // shift to next bit
+    }
+  }
     // ARM MCUs -- Teensy 3.0, 3.1, LC, Arduino Due, RP2040 -------------------
 
-#if defined(ARDUINO_ARCH_RP2040)
+#elif defined(ARDUINO_ARCH_RP2040)
   // Use PIO
   rp2040Show(pin, pixels, numBytes, is800KHz);
 
@@ -3369,6 +3429,14 @@ void Adafruit_NeoPixel::setPin(int16_t p) {
   }
   #endif
 #endif
+#if defined(TARGET_GIGA) || defined(TARGET_M4)
+  gpio = digitalPinToGpio(pin);
+  if (gpio == NULL)
+  {
+      gpio = new mbed::DigitalInOut(digitalPinToPinName(pin), PIN_OUTPUT, PullNone, 0);
+      digitalPinToGpio(pin) = gpio;
+  }
+#endif
 }
 
 /*!

Adafruit_NeoPixel.h

@@ -54,6 +54,11 @@
 #include <Arduino.h>
 #endif
 
+#if defined(TARGET_GIGA) || defined(TARGET_M4)
+#include "mbed.h"
+#include "pinDefinitions.h"
+#endif
+
 #if defined(ARDUINO_ARCH_RP2040)
 #include <stdlib.h>
 #include "hardware/pio.h"
@@ -411,6 +416,9 @@ class Adafruit_NeoPixel {
   GPIO_TypeDef *gpioPort; ///< Output GPIO PORT
   uint32_t gpioPin;       ///< Output GPIO PIN
 #endif
+#if defined(TARGET_GIGA) || defined(TARGET_M4)
+  mbed::DigitalInOut *gpio;
+#endif
 #if defined(ARDUINO_ARCH_RP2040)
   PIO pio = pio0;
   int sm = 0;