Applied some changes from commit f7a65bb

- Improved chip ID detection
- Removed 'Chip erase', 'Fast write' and 'Fast verify' from device info
- Device.cpp reset(void) function is now reset()

src/Device.cpp

@@ -31,43 +31,67 @@
 #include "EefcFlash.h"
 #include "NvmFlash.h"
 
+void
+Device::readChipId(uint32_t& chipId, uint32_t& extChipId)
+{
+    if ((chipId = _samba.readWord(0x400e0740)) != 0)
+    {
+        extChipId = _samba.readWord(0x400e0744);
+    }
+    else if ((chipId = _samba.readWord(0x400e0940)) != 0)
+    {
+        extChipId = _samba.readWord(0x400e0944);
+    }
+}
+
 void
 Device::create()
 {
     Flash* flashPtr;
     uint32_t chipId = 0;
+    uint32_t cpuId = 0;
     uint32_t extChipId = 0;
     uint32_t deviceId = 0;
 
     // Device identification must be performed carefully to avoid reading from
-    // addresses that devices do not support.
+    // addresses that devices do not support which will lock up the CPU
 
     // All devices support addresss 0 as the ARM reset vector so if the vector is
     // a ARM7TDMI branch, then assume we have an Atmel SAM7/9 CHIPID register
     if ((_samba.readWord(0x0) & 0xff000000) == 0xea000000)
     {
         chipId = _samba.readWord(0xfffff240);
     }
-    // Next try the ARM CPUID register since all Coretex-M devices support it.
-    // If it identifies a Coretex M0+, then assume we have a SAMD device
-    // that only supports the ARM device ID register
-    else if ((_samba.readWord(0xe000ed00) & 0x0000fff0) == 0xC600)
-    {
-        deviceId = _samba.readWord(0x41002018);
-    }
-    // Assume we have a SAM3, SAM4 or SAME70 so check the CHIPID registers
-    else if ((chipId = _samba.readWord(0x400e0740)) != 0)
-    {
-        extChipId = _samba.readWord(0x400e0744);
-    }
-    else if ((chipId = _samba.readWord(0x400e0940)) != 0)
-    {
-        extChipId = _samba.readWord(0x400e0944);
-    }
-    // Else we don't know what the device is
     else
     {
-        throw DeviceUnsupportedError();
+        // Next try the ARM CPUID register since all Cortex-M devices support it
+        cpuId = _samba.readWord(0xe000ed00) & 0x0000fff0;
+
+        // Cortex-M0+
+        if (cpuId == 0xC600)
+        {
+            // These should support the ARM device ID register
+            deviceId = _samba.readWord(0x41002018);
+        }
+        // Cortex-M4
+        else if (cpuId == 0xC240)
+        {
+            // SAM4 processors have a reset vector to the SAM-BA ROM
+            if ((_samba.readWord(0x4) & 0xfff00000) == 0x800000)
+            {
+                readChipId(chipId, extChipId);
+            }
+            // Else we should have a device that supports the ARM device ID register
+            else
+            {
+                deviceId = _samba.readWord(0x41002018);
+            }
+        }
+        // For all other Cortex versions try the Atmel chip ID registers
+        else
+        {
+            readChipId(chipId, extChipId);
+        }
     }
 
     // Instantiate the proper flash for the device
@@ -486,7 +510,7 @@ Device::create()
 }
 
 void
-Device::reset(void)
+Device::reset()
 {
     try
     {

src/Device.h

@@ -84,12 +84,14 @@ class Device
 
     FlashPtr& getFlash() { return _flash; }
 
-    void reset(void);
+    void reset();
 
 private:
     Samba& _samba;
     std::unique_ptr<Flash> _flash;
     Family _family;
+
+    void readChipId(uint32_t& chipId, uint32_t& extChipId);
 };
 
 #endif // _DEVICE_H

src/Flasher.cpp

@@ -68,13 +68,6 @@ FlasherInfo::print()
         printf("BOD          : %s\n", bod ? "true" : "false");
     if (canBor)
         printf("BOR          : %s\n", bor ? "true" : "false");
-
-    if (canChipErase)
-        printf("Chip Erase   : true\n");
-    if (canWriteBuffer)
-        printf("Fast Write   : true\n");
-    if (canChecksumBuffer)
-        printf("Fast Verify  : true\n");
 }
 
 void

src/Samba.h

@@ -74,7 +74,7 @@ class Samba
 
     const SerialPort& getSerialPort() { return *_port; }
 
-    void reset(void);
+    void reset();
 
     // Extended SAM-BA functions
     bool canChipErase() { return _canChipErase; }

src/bossac.cpp

@@ -442,7 +442,7 @@ main(int argc, char* argv[])
         {
             uint32_t pageErrors;
             uint32_t totalErrors;
-            
+
             timer_start();
             if (!flasher.verify(argv[args], pageErrors, totalErrors, config.offsetArg))
             {