M2kImpl: add trigger deinit on context close

- This change ensures that the IIO attributes of the trigger are properly
reset when the context is closed. As a result, the interfaces remains in
a usable state, and any previously configured triggers are set to
a condition that always triggers.

Signed-off-by: Adrian Stanea <[email protected]>

src/m2k_impl.cpp

@@ -144,6 +144,11 @@ void M2kImpl::deinitialize()
 	if (aout_impl) {
 		aout_impl->deinitialize();
 	}
+
+	auto trigger_impl = dynamic_cast<M2kHardwareTriggerImpl*>(m_trigger);
+	if (trigger_impl) {
+		trigger_impl->deinitialize();
+	}
 }
 
 void M2kImpl::reset()

src/m2khardwaretrigger_impl.cpp

@@ -181,6 +181,16 @@ void M2kHardwareTriggerImpl::M2kHardwareTriggerImpl::reset()
 	setDigitalExternalCondition(NO_TRIGGER_DIGITAL);
 }
 
+void libm2k::M2kHardwareTriggerImpl::deinitialize()
+{
+	for (unsigned int i = 0; i < m_analog_channels.size(); i++) {
+		setAnalogMode(i, ALWAYS);
+	}
+	for (unsigned int i = 0; i < m_digital_channels.size(); i++) {
+		setDigitalCondition(i, NO_TRIGGER_DIGITAL);
+	}
+}
+
 bool M2kHardwareTriggerImpl::hasExternalTriggerOut() const
 {
 	return m_logic_channels.at(1)->hasAttribute("out_select");
@@ -622,4 +632,4 @@ M2K_TRIGGER_STATUS_ANALOG_OUT M2kHardwareTriggerImpl::getAnalogOutTriggerStatus(
 			    "the current board; Check the firmware version.",
 			    libm2k::EXC_INVALID_FIRMWARE_VERSION);	
 	return DISABLED;
-}
+}

src/m2khardwaretrigger_impl.hpp

@@ -44,6 +44,7 @@ class M2kHardwareTriggerImpl : public M2kHardwareTrigger
 	virtual ~M2kHardwareTriggerImpl() override;
 
 	void reset() override;
+	virtual void deinitialize();
 
 	int getAnalogLevelRaw(unsigned int chnIdx) override;
 	void setAnalogLevelRaw(unsigned int chnIdx, int level) override;

src/m2khardwaretrigger_v0.24_impl.cpp

@@ -85,6 +85,11 @@ void M2kHardwareTriggerV024Impl::reset()
 	setDigitalSource(SRC_NONE);
 }
 
+void libm2k::M2kHardwareTriggerV024Impl::deinitialize()
+{
+	M2kHardwareTriggerImpl::deinitialize();
+}
+
 void M2kHardwareTriggerV024Impl::setAnalogExternalOutSelect(M2K_TRIGGER_OUT_SELECT out_select)
 {
 	unsigned int TRIGGER_OUT_PIN = 1;

src/m2khardwaretrigger_v0.24_impl.hpp

@@ -44,6 +44,7 @@ class M2kHardwareTriggerV024Impl : public M2kHardwareTriggerImpl
 	virtual ~M2kHardwareTriggerV024Impl();
 
 	void reset();
+	void deinitialize() override;
 
 	void setAnalogExternalOutSelect(M2K_TRIGGER_OUT_SELECT output_select);
 	M2K_TRIGGER_OUT_SELECT getAnalogExternalOutSelect();

src/m2khardwaretrigger_v0.33_impl.cpp

@@ -75,6 +75,12 @@ void M2kHardwareTriggerV033Impl::reset()
 	setAnalogOutTriggerStatus(DISABLED);
 }
 
+void libm2k::M2kHardwareTriggerV033Impl::deinitialize()
+{
+	M2kHardwareTriggerV024Impl::deinitialize();
+	setAnalogOutTriggerStatus(DISABLED);
+}
+
 void M2kHardwareTriggerV033Impl::setAnalogOutTriggerSource(M2K_TRIGGER_SOURCE_OUT src)
 {
 	if (src < 0 || src >= m_trigger_source_out.size())

src/m2khardwaretrigger_v0.33_impl.hpp

@@ -43,6 +43,7 @@ class M2kHardwareTriggerV033Impl : public M2kHardwareTriggerV024Impl
 	virtual ~M2kHardwareTriggerV033Impl();
 
 	void reset();
+	void deinitialize() override;
 
 	void setAnalogOutTriggerSource(M2K_TRIGGER_SOURCE_OUT src);
 	M2K_TRIGGER_SOURCE_OUT getAnalogOutTriggerSource() const;