changes PWM resolution to 16bit for all timers

PWM frequency 732 Hz

Author: Adminius

cores/arduino/wiring_analog.c

@@ -42,9 +42,9 @@ static void syncDAC() {
 }
 
 // Wait for synchronization of registers between the clock domains
-static __inline__ void syncTC_8(Tc* TCx) __attribute__((always_inline, unused));
-static void syncTC_8(Tc* TCx) {
-  while (TCx->COUNT8.STATUS.bit.SYNCBUSY);
+static __inline__ void syncTC_16(Tc* TCx) __attribute__((always_inline, unused));
+static void syncTC_16(Tc* TCx) {
+  while (TCx->COUNT16.STATUS.bit.SYNCBUSY);
 }
 
 // Wait for synchronization of registers between the clock domains
@@ -212,7 +212,7 @@ void analogWrite(uint32_t pin, uint32_t value)
 
   if ((attr & PIN_ATTR_PWM) == PIN_ATTR_PWM)
   {
-    value = mapResolution(value, _writeResolution, 8);
+    value = mapResolution(value, _writeResolution, 16);
 
     uint32_t tcNum = GetTCNumber(pinDesc.ulPWMChannel);
     uint8_t tcChannel = GetTCChannelNumber(pinDesc.ulPWMChannel);
@@ -254,37 +254,31 @@ void analogWrite(uint32_t pin, uint32_t value)
         // -- Configure TC
         Tc* TCx = (Tc*) GetTC(pinDesc.ulPWMChannel);
         // Disable TCx
-        TCx->COUNT8.CTRLA.bit.ENABLE = 0;
-        syncTC_8(TCx);
-        // Set Timer counter Mode to 8 bits, normal PWM, prescaler 1/256
-        TCx->COUNT8.CTRLA.reg |= TC_CTRLA_MODE_COUNT8 | TC_CTRLA_WAVEGEN_NPWM | TC_CTRLA_PRESCALER_DIV256;
-        syncTC_8(TCx);
+        TCx->COUNT16.CTRLA.bit.ENABLE = 0;
+        syncTC_16(TCx);
+        // Set Timer counter Mode to 16 bits, normal PWM
+        TCx->COUNT16.CTRLA.reg |= TC_CTRLA_MODE_COUNT16 | TC_CTRLA_WAVEGEN_NPWM;
+        syncTC_16(TCx);
         // Set the initial value
-        TCx->COUNT8.CC[tcChannel].reg = (uint8_t) value;
-        syncTC_8(TCx);
-        // Set PER to maximum counter value (resolution : 0xFF)
-        TCx->COUNT8.PER.reg = 0xFF;
-        syncTC_8(TCx);
+        TCx->COUNT16.CC[tcChannel].reg = (uint32_t) value;
+        syncTC_16(TCx);
         // Enable TCx
-        TCx->COUNT8.CTRLA.bit.ENABLE = 1;
-        syncTC_8(TCx);
+        TCx->COUNT16.CTRLA.bit.ENABLE = 1;
+        syncTC_16(TCx);
       } else {
         // -- Configure TCC
         Tcc* TCCx = (Tcc*) GetTC(pinDesc.ulPWMChannel);
         // Disable TCCx
         TCCx->CTRLA.bit.ENABLE = 0;
         syncTCC(TCCx);
-        // Set prescaler to 1/256
-        TCCx->CTRLA.reg |= TCC_CTRLA_PRESCALER_DIV256;
-        syncTCC(TCCx);
-        // Set TCx as normal PWM
+        // Set TCCx as normal PWM
         TCCx->WAVE.reg |= TCC_WAVE_WAVEGEN_NPWM;
         syncTCC(TCCx);
         // Set the initial value
         TCCx->CC[tcChannel].reg = (uint32_t) value;
         syncTCC(TCCx);
-        // Set PER to maximum counter value (resolution : 0xFF)
-        TCCx->PER.reg = 0xFF;
+        // Set PER to maximum counter value (resolution : 0xFFFF)
+        TCCx->PER.reg = 0xFFFF;
         syncTCC(TCCx);
         // Enable TCCx
         TCCx->CTRLA.bit.ENABLE = 1;
@@ -293,8 +287,8 @@ void analogWrite(uint32_t pin, uint32_t value)
     } else {
       if (tcNum >= TCC_INST_NUM) {
         Tc* TCx = (Tc*) GetTC(pinDesc.ulPWMChannel);
-        TCx->COUNT8.CC[tcChannel].reg = (uint8_t) value;
-        syncTC_8(TCx);
+        TCx->COUNT16.CC[tcChannel].reg = (uint32_t) value;
+        syncTC_16(TCx);
       } else {
         Tcc* TCCx = (Tcc*) GetTC(pinDesc.ulPWMChannel);
         TCCx->CTRLBSET.bit.LUPD = 1;