[DAC] Allow to enable HAL module only

Define `HAL_DAC_MODULE_ONLY` in `build_opt.h` or `hal_conf_extra.h`
allow HAL DAC module usage without any usage by the core.

Fixes #697

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

cores/arduino/stm32/analog.cpp

@@ -48,7 +48,7 @@ extern "C" {
 
 /* Private_Variables */
 #if (defined(HAL_ADC_MODULE_ENABLED) && !defined(HAL_ADC_MODULE_ONLY)) ||\
-    defined(HAL_DAC_MODULE_ENABLED)
+    (defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY))
 static PinName g_current_pin = NC;
 #endif
 
@@ -298,7 +298,7 @@ uint32_t get_pwm_channel(PinName pin)
 }
 #endif /* HAL_TIM_MODULE_ENABLED && !HAL_TIM_MODULE_ONLY */
 
-#ifdef HAL_DAC_MODULE_ENABLED
+#if defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)
 static uint32_t get_dac_channel(PinName pin)
 {
   uint32_t function = pinmap_function(pin, PinMap_DAC);
@@ -556,7 +556,8 @@ void dac_stop(PinName pin)
     return;
   }
 }
-#endif //HAL_DAC_MODULE_ENABLED
+#endif //HAL_DAC_MODULE_ENABLED && !HAL_DAC_MODULE_ONLY
+
 
 #if defined(HAL_ADC_MODULE_ENABLED) && !defined(HAL_ADC_MODULE_ONLY)
 ////////////////////////// ADC INTERFACE FUNCTIONS /////////////////////////////

cores/arduino/wiring_analog.c

@@ -23,7 +23,8 @@
 extern "C" {
 #endif
 
-#if defined(HAL_DAC_MODULE_ENABLED) || (defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY))
+#if (defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)) ||\
+    (defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY))
 //This is the list of the IOs configured
 uint32_t g_anOutputPinConfigured[MAX_NB_PORT] = {0};
 #endif
@@ -94,12 +95,12 @@ void analogOutputInit(void)
 // to digital output.
 void analogWrite(uint32_t ulPin, uint32_t ulValue)
 {
-#if defined(HAL_DAC_MODULE_ENABLED)
+#if defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)
   uint8_t do_init = 0;
 #endif
   PinName p = digitalPinToPinName(ulPin);
   if (p != NC) {
-#ifdef HAL_DAC_MODULE_ENABLED
+#if defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)
     if (pin_in_pinmap(p, PinMap_DAC)) {
       if (is_pin_configured(p, g_anOutputPinConfigured) == false) {
         do_init = 1;
@@ -108,7 +109,7 @@ void analogWrite(uint32_t ulPin, uint32_t ulValue)
       ulValue = mapResolution(ulValue, _writeResolution, DACC_RESOLUTION);
       dac_write_value(p, ulValue, do_init);
     } else
-#endif //HAL_DAC_MODULE_ENABLED
+#endif //HAL_DAC_MODULE_ENABLED && !HAL_DAC_MODULE_ONLY
 #if defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY)
       if (pin_in_pinmap(p, PinMap_PWM)) {
         if (is_pin_configured(p, g_anOutputPinConfigured) == false) {

cores/arduino/wiring_digital.c

@@ -32,13 +32,14 @@ void pinMode(uint32_t ulPin, uint32_t ulMode)
 
   if (p != NC) {
     // If the pin that support PWM or DAC output, we need to turn it off
-#if defined(HAL_DAC_MODULE_ENABLED) || (defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY))
+#if (defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)) ||\
+    (defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY))
     if (is_pin_configured(p, g_anOutputPinConfigured)) {
-#ifdef HAL_DAC_MODULE_ENABLED
+#if defined(HAL_DAC_MODULE_ENABLED) && !defined(HAL_DAC_MODULE_ONLY)
       if (pin_in_pinmap(p, PinMap_DAC)) {
         dac_stop(p);
       } else
-#endif //HAL_DAC_MODULE_ENABLED
+#endif //HAL_DAC_MODULE_ENABLED && !HAL_DAC_MODULE_ONLY
 #if defined(HAL_TIM_MODULE_ENABLED) && !defined(HAL_TIM_MODULE_ONLY)
         if (pin_in_pinmap(p, PinMap_PWM)) {
           pwm_stop(p);