generators: correctly handle clustered subtypes used in Atmel SAMD21 SVD for important peripherals

Signed-off-by: Ron Evans <ron@hybridgroup.com>

src/runtime/runtime_atsamd21g18.go

@@ -187,24 +187,24 @@ func initRTC() {
 	sam.PM.APBAMASK |= sam.PM_APBAMASK_RTC_
 
 	// disable RTC
-	sam.RTC.MODE0.CTRL = 0
+	sam.RTC_MODE0.CTRL = 0
 	waitForSync()
 
 	// reset RTC
-	sam.RTC.MODE0.CTRL |= sam.RTC_MODE0_CTRL_SWRST
+	sam.RTC_MODE0.CTRL |= sam.RTC_MODE0_CTRL_SWRST
 	waitForSync()
 
 	// set Mode0 to 32-bit counter (mode 0) with prescaler 1 and GCLK2 is 32KHz/1
-	sam.RTC.MODE0.CTRL = sam.RegValue16((sam.RTC_MODE0_CTRL_MODE_COUNT32 << sam.RTC_MODE0_CTRL_MODE_Pos) |
+	sam.RTC_MODE0.CTRL = sam.RegValue16((sam.RTC_MODE0_CTRL_MODE_COUNT32 << sam.RTC_MODE0_CTRL_MODE_Pos) |
 		(sam.RTC_MODE0_CTRL_PRESCALER_DIV1 << sam.RTC_MODE0_CTRL_PRESCALER_Pos) |
 		sam.RTC_MODE0_CTRL_MATCHCLR)
 	waitForSync()
 
-	sam.RTC.MODE0.COMP0 = 0xffffffff
+	sam.RTC_MODE0.COMP0 = 0xffffffff
 	waitForSync()
 
 	// re-enable RTC
-	sam.RTC.MODE0.CTRL |= sam.RTC_MODE0_CTRL_ENABLE
+	sam.RTC_MODE0.CTRL |= sam.RTC_MODE0_CTRL_ENABLE
 	waitForSync()
 
 	arm.EnableIRQ(sam.IRQ_RTC)
@@ -241,10 +241,10 @@ func sleepTicks(d timeUnit) {
 // ticks returns number of microseconds since start.
 func ticks() timeUnit {
 	// request read of count
-	sam.RTC.MODE0.READREQ = sam.RTC_MODE0_READREQ_RREQ
+	sam.RTC_MODE0.READREQ = sam.RTC_MODE0_READREQ_RREQ
 	waitForSync()
 
-	rtcCounter := uint64(sam.RTC.MODE0.COUNT) * 30 // each counter tick == 30.5us
+	rtcCounter := uint64(sam.RTC_MODE0.COUNT) * 30 // each counter tick == 30.5us
 	offset := (rtcCounter - timerLastCounter)      // change since last measurement
 	timerLastCounter = rtcCounter
 	timestamp += timeUnit(offset) // TODO: not precise
@@ -260,16 +260,16 @@ func timerSleep(ticks uint32) {
 	}
 
 	// request read of count
-	sam.RTC.MODE0.READREQ = sam.RTC_MODE0_READREQ_RREQ
+	sam.RTC_MODE0.READREQ = sam.RTC_MODE0_READREQ_RREQ
 	waitForSync()
 
 	// set compare value
-	cnt := sam.RTC.MODE0.COUNT
-	sam.RTC.MODE0.COMP0 = sam.RegValue(uint32(cnt) + (ticks / 30)) // each counter tick == 30.5us
+	cnt := sam.RTC_MODE0.COUNT
+	sam.RTC_MODE0.COMP0 = sam.RegValue(uint32(cnt) + (ticks / 30)) // each counter tick == 30.5us
 	waitForSync()
 
 	// enable IRQ for CMP0 compare
-	sam.RTC.MODE0.INTENSET |= sam.RTC_MODE0_INTENSET_CMP0
+	sam.RTC_MODE0.INTENSET |= sam.RTC_MODE0_INTENSET_CMP0
 
 	for !timerWakeup {
 		arm.Asm("wfi")
@@ -279,7 +279,7 @@ func timerSleep(ticks uint32) {
 //go:export RTC_IRQHandler
 func handleRTC() {
 	// disable IRQ for CMP0 compare
-	sam.RTC.MODE0.INTFLAG = sam.RTC_MODE0_INTENSET_CMP0
+	sam.RTC_MODE0.INTFLAG = sam.RTC_MODE0_INTENSET_CMP0
 
 	timerWakeup = true
 }

tools/gen-device-svd.py

@@ -81,6 +81,15 @@ def readSVD(path, sourceURL):
             }
             device.peripherals.append(peripheral)
             peripheralDict[name] = peripheral
+            if 'subtypes' in derivedFrom:
+                for subtype in derivedFrom['subtypes']:
+                    subp = {
+                        'name':        name + "_"+subtype['clusterName'],
+                        'groupName':   subtype['groupName'],
+                        'description': subtype['description'],
+                        'baseAddress': baseAddress,
+                    }
+                    device.peripherals.append(subp)
             continue
 
         peripheral = {
@@ -89,6 +98,7 @@ def readSVD(path, sourceURL):
             'description': description,
             'baseAddress': baseAddress,
             'registers':   [],
+            'subtypes':   [],
         }
         device.peripherals.append(peripheral)
         peripheralDict[name] = peripheral
@@ -108,6 +118,23 @@ def readSVD(path, sourceURL):
                 clusterPrefix = clusterName + '_'
                 clusterOffset = int(getText(cluster.find('addressOffset')), 0)
                 if cluster.find('dim') is None:
+                    if clusterOffset is 0:
+                        # make this a separate peripheral
+                        cpRegisters = []
+                        for regEl in cluster.findall('register'):
+                            cpRegisters.extend(parseRegister(groupName, regEl, baseAddress, clusterName+"_"))
+                        cpRegisters.sort(key=lambda r: r['address'])
+                        clusterPeripheral = {
+                            'name':        name+ "_" +clusterName,
+                            'groupName':   groupName+ "_" +clusterName,
+                            'description': description+ " - " +clusterName,
+                            'clusterName': clusterName,
+                            'baseAddress': baseAddress,
+                            'registers':   cpRegisters,
+                        }
+                        device.peripherals.append(clusterPeripheral)
+                        peripheral['subtypes'].append(clusterPeripheral)
+                        continue
                     dim = None
                     dimIncrement = None
                 else: