add another example, xtal driving

Author: ladyada

examples/program_uno328.py

@@ -17,6 +17,9 @@
 avrprog = adafruit_avrprog.AVRprog()
 avrprog.init(spi, board.D5)
 
+# we can generate an 6 MHz clock for driving bare chips too!
+clock_pwm = pulseio.PWMOut(board.D9, frequency=6000000, duty_cycle=65536//2)
+
 # Each chip has to have a definition so the script knows how to find it
 atmega328p = {'name': "ATmega328P"}
 atmega328p['sig'] = [0x1E, 0x95, 0x0F]

examples/read_signature.py

@@ -0,0 +1,20 @@
+"""
+Read Signature Test - All this does is read the signature from the chip to
+check connectivity!
+"""
+
+import board
+import busio
+import pulseio
+import adafruit_avrprog
+
+spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+avrprog = adafruit_avrprog.AVRprog()
+avrprog.init(spi, board.D5)
+
+# we can generate an 6 MHz clock for driving bare chips too!
+clock_pwm = pulseio.PWMOut(board.D9, frequency=6000000, duty_cycle=65536//2)
+
+avrprog.begin()
+print("Signature bytes: ", [hex(i) for i in avrprog.read_signature()])
+avrprog.end()