From: Erik Andresen <erik@vontaene.de>
Date: Sun, 13 Nov 2016 21:08:58 +0000 (+0100)
Subject: added gpio to bus pirate
X-Git-Url: https://defiant.homedns.org/gitweb/?a=commitdiff_plain;h=8a303341088f5fc6de845a800510942e0788493f;p=pyshared.git

added gpio to bus pirate
---

diff --git a/bus_pirate.py b/bus_pirate.py
index edc5699..aa7d51b 100644
--- a/bus_pirate.py
+++ b/bus_pirate.py
@@ -4,6 +4,15 @@
 import serial
 import struct
 
+dPinToBit = {
+		"POWER": 6,
+		"PULLUP": 5,
+		"AUX": 4,
+		"MOSI": 3,
+		"CLK": 2,
+		"MISO": 1,
+		"CS": 0
+}
 
 # http://dangerousprototypes.com/docs/Bitbang
 # http://dangerousprototypes.com/docs/SPI_(binary)
@@ -11,6 +20,8 @@ class BP:
 	def __init__(self, sDevice):
 		self.pSerial = serial.Serial(sDevice, baudrate=115200, timeout=0.1)
 		self.mode_bit_bang()
+		self.io_state = 0
+		self.io_dir = 0
 
 	def command(self, cmd, num_read):
 		self.pSerial.write(cmd)
@@ -20,7 +31,7 @@ class BP:
 		for i in range(20):
 			if self.command(chr(0x0), 5) == "BBIO1":
 				return
-		raise Exception()
+		raise Exception("Failed to enter bit bang mode")
 
 	def mode_spi(self, mode, speed):
 		if self.command(chr(0x1), 4) != "SPI1":
@@ -40,20 +51,13 @@ class BP:
 		elif mode == 3:
 			self.spi_command(chr(0b10001110))
 
-
 	def spi_set_speed(self, speed):
 		lSpeeds = ["30kHz", "125kHz", "250kHz", "1MHz", "2MHz", "2.6MHz", "4MHz", "8MHz"]
 		val = lSpeeds.index(speed)
 		self.spi_command(chr(0b01100000 | val))
 
-	def command_byte_set(self, bit):
-		enable = 1<<bit
-		state = ord(self.command(chr(0x80 | enable, 1)))
-		if not state & enable:
-			raise Exception("Got 0x%x, expected 0xc0" % state)
-
 	def power_enable(self):
-		self.command_byte_set(6)
+		self.set_io("POWER", True)
 	
 	def get_adc(self):
 		s = self.command(chr(0x14), 2)
@@ -69,3 +73,36 @@ class BP:
 		if len(data) > 4096:
 			raise Exception("SPI Data String too long")
 		return self.spi_command(struct.pack(">Bhh%ds" % len(data), 0x04, len(data), num_read, data))
+
+	def set_io_output(self, pin):
+		if pin not in dPinToBit.keys():
+			raise Exception("Bad output pin")
+		self.io_dir &= ~(1 << dPinToBit[pin])
+		state = 0b01000000 | self.io_dir
+		self.command(chr(state), 1)
+
+	def set_io_input(self, pin):
+		if pin not in dPinToBit.keys():
+			raise Exception("Bad input pin")
+		self.io_dir |= (1 << dPinToBit[pin])
+		state = 0b01000000 | self.io_dir
+		self.command(chr(state), 1)
+
+	def set_io(self, pin, val):
+		if pin not in dPinToBit.keys():
+			raise Exception("Bad output pin")
+		if val:
+			self.io_state |=  (1 << dPinToBit[pin])
+		else:
+			self.io_state &= ~(1 << dPinToBit[pin])
+		state = self.update_io()
+
+	def update_io(self):
+		state = self.command(chr(0b10000000 | self.io_state), 1)
+		return ord(state)
+
+	def get_io(self, pin):
+		if pin not in dPinToBit.keys():
+			raise Exception("Bad I/O pin")
+		state = self.update_io()
+		return state & (1 << dPinToBit[pin])