Add ATtiny13a support

adafruit_avrprog.py

@@ -58,6 +58,41 @@ class AVRprog:
     """
     Helper class used to program AVR chips from CircuitPython.
     """
+    class Boards:
+        """
+        Some well known board definitions.
+        """
+        # pylint: disable=too-few-public-methods
+        ATtiny13a = {
+            'name': "ATtiny13a",
+            'sig': [0x1E, 0x90, 0x07],
+            'flash_size': 1024,
+            'page_size': 32,
+            'fuse_mask': (0xFF, 0xFF, 0x00, 0x03),
+            'clock_speed': 100000
+        }
+        ATtiny85 = {
+            'name': "ATtiny85",
+            'sig': [0x1E, 0x93, 0x0B],
+            'flash_size': 8192,
+            'page_size': 64,
+            'fuse_mask': (0xFF, 0xFF, 0x07, 0x3F)
+        }
+        ATmega328p = {
+            'name': "ATmega328p",
+            'sig': [0x1E, 0x95, 0x0F],
+            'flash_size': 32768,
+            'page_size': 128,
+            'fuse_mask': (0xFF, 0xFF, 0x07, 0x3F),
+        }
+        ATmega2560 = {
+            'name': "ATmega2560",
+            'sig': [0x1E, 0x98, 0x01],
+            'flash_size': 262144,
+            'page_size': 256,
+            'fuse_mask': (0xFF, 0xFF, 0x07, 0x3F)
+        }
+
     _spi = None
     _rst = None
 
@@ -100,7 +135,8 @@ def program_file(self, chip, file_name, verbose=False, verify=True):
             print("Erasing chip....")
         self.erase_chip()
 
-        self.begin()
+        clock_speed = getattr(chip, 'clock_speed', _FAST_CLOCK)
+        self.begin(clock=clock_speed)
 
         # create a file state dictionary
         file_state = {'line': 0, 'ext_addr': 0, 'eof': False}
@@ -164,7 +200,8 @@ def verify_file(self, chip, file_name, verbose=False):
         file_state['f'] = open(file_name, 'r')
 
         page_size = chip['page_size']
-        self.begin()
+        clock_speed = getattr(chip, 'clock_speed', _FAST_CLOCK)
+        self.begin(clock=clock_speed)
         for page_addr in range(0x0, chip['flash_size'], page_size):
             page_buffer = bytearray(page_size)
             for b in range(page_size):

examples/attiny13a_blink.hex

@@ -0,0 +1,6 @@
+:1000000009C00EC00DC00CC00BC00AC009C008C09A
+:1000100007C006C011241FBECFE9CDBF02D012C059
+:10002000EFCF81E087BB18BA98E088B3892788BBF7
+:100030002FEF35EA8EE0215030408040E1F700C0DC
+:080040000000F3CFF894FFCF9C
+:00000001FF

examples/avrprog_program_mega2560.py

@@ -1,7 +1,7 @@
 """
 Arduino Mega 2560 programming example, be sure you have the Mega/2560 wired up so:
   Mega Ground to CircuitPython GND
-  Mega 5V to CircuitPythong USB or make sure the Trinket is powered by USB
+  Mega 5V to CircuitPython USB or make sure the Trinket is powered by USB
   Pin 52 -> CircuitPython SCK
   Pin 50 -> CircuitPython MISO  - Note this is backwards from what you expect
   Pin 51 -> CircuitPython MOSI  - Note this is backwards from what you expect
@@ -17,12 +17,18 @@
 avrprog = adafruit_avrprog.AVRprog()
 avrprog.init(spi, board.D5)
 
-# Each chip has to have a definition so the script knows how to find it
-atmega2560 = {'name': "ATmega2560"}
-atmega2560['sig'] = [0x1E, 0x98, 0x01]
-atmega2560['flash_size'] = 262144
-atmega2560['page_size'] = 256
-atmega2560['fuse_mask'] = (0xFF, 0xFF, 0x07, 0x3F)
+# To program a chip, you'll need to find out the signature, size of the flash,
+# flash-page size and fuse mask. You can find this in the datasheet or in
+# avrdude.conf located at:
+# http://svn.savannah.nongnu.org/viewvc/*checkout*/avrdude/trunk/avrdude/avrdude.conf.in
+# You can also use the predefined values in AVRprog.Boards
+atmega2560 = {
+    'name': "ATmega2560",
+    'sig': [0x1E, 0x98, 0x01],
+    'flash_size': 262144,
+    'page_size': 256,
+    'fuse_mask': (0xFF, 0xFF, 0x07, 0x3F)
+}
 
 def error(err):
     """ Helper to print out errors for us and then halt """

examples/avrprog_program_tiny13a.py

@@ -0,0 +1,44 @@
+"""
+ATtiny13a programming example, be sure you have the '13a wired up so:
+  ATtiny13a GND to CircuitPython GND
+  ATtiny13a VCC to CircuitPython USB
+  Pin 2 -> CircuitPython SCK
+  Pin 1 -> CircuitPython MISO
+  Pin 0 -> CircuitPython MOSI
+  RESET  -> CircuitPython D5 (or change the init() below to change it!)
+Drag "attiny13a_blink.hex" onto the CircuitPython disk drive, then open REPL!
+"""
+
+import board
+import busio
+import adafruit_avrprog
+
+spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+avrprog = adafruit_avrprog.AVRprog()
+avrprog.init(spi, board.D5)
+
+# Each chip has to have a definition so the script knows how to find it
+attiny13 = avrprog.Boards.ATtiny13a
+
+def error(err):
+    """ Helper to print out errors for us and then halt """
+    print("ERROR: "+err)
+    avrprog.end()
+    while True:
+        pass
+
+while input("Ready to GO, type 'G' here to start> ") != 'G':
+    pass
+
+if not avrprog.verify_sig(attiny13, verbose=True):
+    error("Signature read failure")
+print("Found", attiny13['name'])
+
+avrprog.write_fuses(attiny13, low=0x7A, high=0xFF)
+if not avrprog.verify_fuses(attiny13, low=0x7A, high=0xFF):
+    error("Failure verifying fuses!")
+
+print("Programming flash from file")
+avrprog.program_file(attiny13, "attiny13a_blink.hex", verbose=True, verify=True)
+
+print("Done!")

examples/avrprog_program_trinket85.py

@@ -18,11 +18,7 @@
 avrprog.init(spi, board.D5)
 
 # Each chip has to have a definition so the script knows how to find it
-attiny85 = {'name': "ATtiny85"}
-attiny85['sig'] = [0x1E, 0x93, 0x0B]
-attiny85['flash_size'] = 8192
-attiny85['page_size'] = 64
-attiny85['fuse_mask'] = (0xFF, 0xFF, 0x07, 0x3F)
+attiny85 = avrprog.Boards.ATtiny85
 
 def error(err):
     """ Helper to print out errors for us and then halt """

examples/avrprog_program_uno328.py

@@ -24,11 +24,7 @@
 #pylint: enable-msg=no-member
 
 # Each chip has to have a definition so the script knows how to find it
-atmega328p = {'name': "ATmega328P"}
-atmega328p['sig'] = [0x1E, 0x95, 0x0F]
-atmega328p['flash_size'] = 32768
-atmega328p['page_size'] = 128
-atmega328p['fuse_mask'] = (0xFF, 0xFF, 0x07, 0x3F)
+atmega328p = avrprog.Boards.ATmega328p
 
 def error(err):
     """ Helper to print out errors for us and then halt """