The branch, master has been updated
via d160863c527c8a3fdf1e821a64c59192a2fc2150 (commit)
from de3da328335f1dd7e55bf251f900123d4e0a0785 (commit)
- Log -----------------------------------------------------------------
commit d160863c527c8a3fdf1e821a64c59192a2fc2150
Author: Rodney Sinclair <rodney@xxxxxxxxxxxxxx>
Date: Wed Jan 14 17:19:42 2015 +0100
Add cbus python example code
-----------------------------------------------------------------------
Summary of changes:
python/examples/CMakeLists.txt | 2 +-
python/examples/cbus.py | 173 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 174 insertions(+), 1 deletions(-)
create mode 100644 python/examples/cbus.py
diff --git a/python/examples/CMakeLists.txt b/python/examples/CMakeLists.txt
index bca7daf..b4ed93d 100644
--- a/python/examples/CMakeLists.txt
+++ b/python/examples/CMakeLists.txt
@@ -1,4 +1,4 @@
-install ( FILES simple.py complete.py
+install ( FILES simple.py complete.py cbus.py
DESTINATION share/libftdi/examples
PERMISSIONS OWNER_READ GROUP_READ WORLD_READ
)
diff --git a/python/examples/cbus.py b/python/examples/cbus.py
new file mode 100644
index 0000000..18d8ab5
--- /dev/null
+++ b/python/examples/cbus.py
@@ -0,0 +1,173 @@
+#!/usr/bin/python2
+"""
+Copyright 2015, Sinclair R.F., Inc.
+
+This program is distributed under the GPL, version 2.
+
+Demonstrate how to configure the FT230X USB UART bridge as follows:
+ max_power 500 mA
+ CBUS3 Drive 1 (accomodate PCB error)
+"""
+
+import sys
+
+# Need to install libftdi for the following to work (see README.txt)
+import ftdi1 as ftdi
+
+# Define class for displaying errors.
+class ErrorMsg(Exception):
+ def __init__(self,message):
+ self.message = message;
+ def __str__(self):
+ return self.message;
+
+# Function to convert CBUSH values to human-readable strings
+def cbush_string(value):
+ if value == ftdi.CBUSH_AWAKE:
+ return 'AWAKE'
+ if value == ftdi.CBUSH_BAT_DETECT:
+ return 'BAT_DETECT'
+ if value == ftdi.CBUSH_BAT_DETECT_NEG:
+ return 'BAT_DETECT_NEG'
+ if value == ftdi.CBUSH_BB_RD:
+ return 'BB_RD'
+ if value == ftdi.CBUSH_BB_WR:
+ return 'BB_WR'
+ if value == ftdi.CBUSH_CLK15:
+ return 'CLK15'
+ if value == ftdi.CBUSH_CLK30:
+ return 'CLK30'
+ if value == ftdi.CBUSH_CLK7_5:
+ return 'CLK7_5'
+ if value == ftdi.CBUSH_DRIVE_0:
+ return 'DRIVE_0'
+ if value == ftdi.CBUSH_DRIVE1:
+ return 'DRIVE_1'
+ if value == ftdi.CBUSH_I2C_RXF:
+ return 'I2C_RXF'
+ if value == ftdi.CBUSH_I2C_TXE:
+ return 'I2C_TXE'
+ if value == ftdi.CBUSH_IOMODE:
+ return 'IOMODE'
+ if value == ftdi.CBUSH_PWREN:
+ return 'PWREN'
+ if value == ftdi.CBUSH_RXLED:
+ return 'RXLED'
+ if value == ftdi.CBUSH_SLEEP:
+ return 'SLEEP'
+ if value == ftdi.CBUSH_TIME_STAMP:
+ return 'TIME_STAMP'
+ if value == ftdi.CBUSH_TRISTATE:
+ return 'TRISTATE'
+ if value == ftdi.CBUSH_TXDEN:
+ return 'TXDEN'
+ if value == ftdi.CBUSH_TXLED:
+ return 'TXLED'
+ if value == ftdi.CBUSH_TXRXLED:
+ return 'TXRXLED'
+ if value == ftdi.CBUSH_VBUS_SENSE:
+ return 'VBUS_SENSE'
+ return 'UNKNOWN'
+
+# Surround the program with a try ... except clause.
+try:
+
+ # Allocate and inialize an ftdi context.
+ ftdic = ftdi.new()
+ if ftdic == 0:
+ raise ErrorMsg('ftdi.new() failed')
+
+ # List all the FT230X devices.
+ nDevices, devlist = ftdi.usb_find_all(ftdic, 0x0403, 0x6015)
+ if nDevices < 0:
+ raise ErrorMsg('ftdi.usb_find_all error = %s' %
ftdi.get_error_string(ftdic));
+ elif nDevices == 0:
+ raise ErrorMsg('No FT230X devices found');
+ elif nDevices != 1:
+ raise ErrorMsg('More than one FT230X device found');
+
+ # Display the identified single FT230X device.
+ ret, manufacturer, description, serial = ftdi.usb_get_strings(ftdic,
devlist.dev)
+ if ret < 0:
+ raise ErrorMsg('ftdi.usb_get_strings error = %s' %
ftdi.get_error_string(ftdic))
+ print 'manufacturer="%s" description="%s" serial="%s"' % (manufacturer,
description, serial)
+
+ # Open the identified single FT230X device.
+ ret = ftdi.usb_open_desc(ftdic, 0x0403, 0x6015, description, serial);
+ if ret < 0:
+ raise ErrorMsg('ftdi.usb_open_desc error = %s' %
ftdi.get_error_string(ftdic))
+
+ # Read the chip id.
+ ret, chipid = ftdi.read_chipid(ftdic)
+ if ret < 0:
+ raise ErrorMsg('ftdi.read_chipid error = %s' %
ftdi.get_error_string(ftdic))
+ print 'chip id=0x%08X' % (chipid % 2**32)
+
+ # Read the EEPROM
+ ret = ftdi.read_eeprom(ftdic);
+ if ret < 0:
+ raise ErrorMsg('ftdi.read_eeprom error = %s' %
ftdi.get_error_string(ftdic))
+
+ # Get a read-only copy of the EEPROM
+ if True:
+ eeprom_size = ftdic.eeprom.size
+ ret, eeprom_buf = ftdi.get_eeprom_buf(ftdic, eeprom_size)
+ if ret < 0:
+ raise ErrorMsg('ftdi.get_eeprom_buf error = %s' %
ftdi.get_error_string(ftdic))
+ for i in range(0,eeprom_size,16):
+ sys.stdout.write('%04x: ' % i)
+ for j in range(16):
+ sys.stdout.write('%02x ' % ord(eeprom_buf[i+j]))
+ if j in (7,15,):
+ sys.stdout.write(' ')
+ for j in range(16):
+ x = eeprom_buf[i+j]
+ if 32 <= ord(x) <= 0x7E:
+ sys.stdout.write(x)
+ else:
+ sys.stdout.write('.')
+ sys.stdout.write('\n');
+
+ # Read and display the EEPROM (in human readable format)
+ ret = ftdi.eeprom_decode(ftdic, 1);
+ if ret < 0:
+ raise ErrorMsg('ftdi.eeprom_decode error = %s' %
ftdi.get_error_string(ftdic))
+
+ # Set the maximum power to 500mA.
+ print 'initial max_power = %dmA' % ftdic.eeprom.max_power
+ ftdic.eeprom.max_power = 500
+ print 'new max_power = %dmA' % ftdic.eeprom.max_power
+
+ # Set CBUS3 to DRIVE_1 (the board needs to be reworked to use PWREN# and
BCD#)
+ ret, value = ftdi.get_eeprom_value(ftdic,ftdi.CBUS_FUNCTION_3)
+ if ret < 0:
+ raise ErrorMsg('ftdi.get_eeprom_value error = %s' %
ftdi.get_error_string(ftdic))
+ print 'initial CBUS3 = %d (%s)' % (value,cbush_string(value),)
+ ret = ftdi.set_eeprom_value(ftdic,ftdi.CBUS_FUNCTION_3,ftdi.CBUSH_DRIVE1)
+ if ret < 0:
+ raise ErrorMsg('ftdi.set_eeprom_value error = %s' %
ftdi.get_error_string(ftdic))
+ ret, value = ftdi.get_eeprom_value(ftdic,ftdi.CBUS_FUNCTION_3)
+ if ret < 0:
+ raise ErrorMsg('ftdi.get_eeprom_value error = %s' %
ftdi.get_error_string(ftdic))
+ print 'new CBUS3 = %d (%s)' % (value,cbush_string(value),)
+
+ # Write the new EEPROM settings.
+ if False:
+ ret = ftdi.eeprom_build(ftdic)
+ if ret < 0:
+ raise ErrorMsg('ftdi.eeprom_build error = %s' %
ftdi.get_error_string(ftdic))
+ ret = ftdi.write_eeprom(ftdic)
+ if ret < 0:
+ raise ErrorMsg('ftdi.write_eeprom error = %s' %
ftdi.get_error_string(ftdic))
+ print 'EEPROM write succeeded'
+ else:
+ print 'EEPROM write not attempted'
+
+ # Close the ftdi context.
+ ret = ftdi.usb_close(ftdic);
+ if ret < 0:
+ raise ErrorMsg('ftdi.usb_close error = %s' % ftdi.get_error_string(ftdic));
+
+except ErrorMsg, msg:
+ print >> sys.stderr, 'FATAL ERROR: ' + str(msg);
+ exit(1);
hooks/post-receive
--
A library to talk to FTDI chips
--
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