Changes for 5LC

2 files changed, 145 insertions, 0 deletions

diff --git a/src/Hardware/SAME70/DmacManager.cpp b/src/Hardware/SAME70/DmacManager.cpp
new file mode 100644
index 00000000..052e23dc
--- /dev/null
+++ b/src/Hardware/SAME70/DmacManager.cpp
@@ -0,0 +1,64 @@
+/*
+ * DmacManager.cpp
+ *
+ *  Created on: 12 Sep 2018
+ *      Author: David
+ *
+ * The purpose of this module is to service the DMA Complete interrupt from the XDMAC on the SAME70
+ * and route the interrupts caused by the various DMA channels to the corresponding drivers.
+ */
+
+#include <RepRapFirmware.h>
+#include "DmacManager.h"
+
+#if SAME70
+
+namespace DmacManager
+{
+	static StandardCallbackFunction callbackFunctions[NumDmaChannelsUsed] = { 0 };
+	static CallbackParameter callbackParameters[NumDmaChannelsUsed];
+
+	void Init() noexcept
+	{
+		pmc_enable_periph_clk(ID_XDMAC);
+		for (unsigned int i = 0; i < NumDmaChannelsUsed; ++i)
+		{
+			XDMAC->XDMAC_CHID[i].XDMAC_CID = 0xFFFFFFFF;	// disable all XDMAC interrupts from the channel
+		}
+		NVIC_EnableIRQ(XDMAC_IRQn);
+	}
+
+	void SetInterruptCallback(const uint8_t channel, StandardCallbackFunction fn, CallbackParameter param) noexcept
+	{
+		if (channel < NumDmaChannelsUsed)
+		{
+			callbackFunctions[channel] = fn;
+			callbackParameters[channel] = param;
+		}
+	}
+}
+
+// DMAC interrupt service routine
+extern "C" void XDMAC_Handler() noexcept
+{
+	uint32_t pendingChannels = XDMAC->XDMAC_GIS;
+	for (size_t i = 0; i < NumDmaChannelsUsed; ++i)
+	{
+		if ((pendingChannels & 1u) != 0)
+		{
+			if (DmacManager::callbackFunctions[i] != nullptr)
+			{
+				DmacManager::callbackFunctions[i](DmacManager::callbackParameters[i]);	// we rely on the callback to clear the interrupt
+			}
+			else
+			{
+				XDMAC->XDMAC_CHID[i].XDMAC_CID = 0xFFFFFFFF;							// no callback, so just clear the interrupt
+			}
+		}
+		pendingChannels >>= 1;
+	}
+}
+
+#endif
+
+// End
diff --git a/src/Hardware/SAME70/DmacManager.h b/src/Hardware/SAME70/DmacManager.h
new file mode 100644
index 00000000..4433a4ca
--- /dev/null
+++ b/src/Hardware/SAME70/DmacManager.h
@@ -0,0 +1,81 @@
+/*
+ * DmacManager.h
+ *
+ *  Created on: 12 Sep 2018
+ *      Author: David
+ */
+
+#ifndef SRC_DMACMANAGER_H_
+#define SRC_DMACMANAGER_H_
+
+#if SAME70
+
+// DMAC peripheral identifiers for the SAME70 form table 36.1 in the data sheet. These don't seem to be defined anywhere in the ASF files.
+enum class DmaTrigSource : uint32_t
+{
+	hsmci = 0,	// both transmit and receive
+	spi0tx,
+	spi0rx,
+	spi1tx,
+	spi1rx,
+	qspitx,
+	qspirx,
+	usart0tx,
+	usart0rx,
+	usart1tx,
+	usart1rx,
+	usart2tx,
+	usart2rx,
+	pwm0tx,
+	twihs0tx,
+	twihs0rx,
+	twihs1tx,
+	twihs1rx,
+	twihs2tx,
+	twihs2rx,
+	uart0tx,
+	uart0rx,
+	uart1tx,
+	uart1rx,
+	uart2tx,
+	uart2rx,
+	uart3tx,
+	uart3rx,
+	uart4tx,
+	uart4rx,
+	dacctx,
+	unused1,	// ID 30 does not appear in the table
+	ssctx,
+	sscrx,
+	pioarx,
+	afec0rx,
+	afec1rx,
+	aestx,
+	aesrx,
+	pwm1tx,
+	tc0rx,
+	tc3rx,
+	tc6rx,
+	tc9rx,
+	i2sc0txl,
+	i2sc0rxl,
+	i2sc1txl,
+	i2sc1rxl,
+	i2sc0txr,
+	i2sc0rxr,
+	i2sc1txr,
+	i2sc1rxr,
+	numPeripheralIds
+};
+
+static_assert((uint32_t)DmaTrigSource::numPeripheralIds == 52, "Error in peripheral ID table");
+
+namespace DmacManager
+{
+	void Init() noexcept;
+	void SetInterruptCallback(const uint8_t channel, StandardCallbackFunction fn, CallbackParameter param) noexcept;
+}
+
+#endif
+
+#endif /* SRC_DMACMANAGER_H_ */