Example Three - Advanced I2C

examples/qwiic_eeprom_ex3_advanced_i2c.py
 1# !/usr/bin/env python
 2# ----------------------------------------------------------------------
 3# qwiic_eeprom_ex3_advanced_i2c.py
 4#
 5# This example demonstrates how to pass a custom EEPROM address.
 6# ----------------------------------------------------------------------
 7#
 8# Written by Priyanka Makin @ SparkFun Electronics, July 2021
 9#
10# This python library supports the SparkFun Electronics qwiic sensor/
11# board ecosystem on a Raspberry Pi (and compatable) single board 
12# computers.
13#
14# More information on qwiic is at https://www.sparkfun.com/qwiic
15#
16# Do you like this library? Help support SparkFun by buying a board!
17#
18# ======================================================================
19# Copyright (c) 2021 SparkFun Electronics
20#
21# Permission is hereby granted, free of charge, to any person obtaining 
22# a copy of this software and associated documentation files (the 
23# "Software"), to deal in the Software without restriction, including 
24# without limitation the rights to use, copy, modify, merge, publish, 
25# distribute, sublicense, and/or sell copies of the Software, and to 
26# permit persons to whom the Software is furnished to do so, subject to 
27# the following conditions:
28#
29# The above copyright notice and this permission notice shall be 
30# included in all copies or substantial portions of the Software.
31#
32# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
33# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
34# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
35# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
36# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
37# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
38# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
39#=======================================================================
40# Example 3
41
42from __future__ import print_function
43import qwiic_eeprom
44import time
45import sys
46
47def run_example():
48    
49    EEPROM_ADDRESS = 0b1010001 # 0b1010(A2 A1 A0): A standard I2C EEPROM with the ADR0 bit set to VCC
50
51    print("\nSparkFun Qwiic EEPROM, Example 3\n")
52    my_eeprom = qwiic_eeprom.QwiicEEPROM(0x51)
53
54    if my_eeprom.begin() != True:
55        print("\nThe Qwiic EEPROM isn't connected to the system. Please check your connection", \
56            file=sys.stderr)
57        return
58
59    print("\nEEPROM ready!")
60
61    my_value = -7.35
62    my_eeprom.write_float(20, my_value)   # (location, data)
63    my_read = my_eeprom.read_float(20) # (location to read)
64    # Round to 2-decimal point precision
65    my_read = round(my_read, 2)
66    print("\nI read: " + str(my_read))
67
68if __name__ == '__main__':
69    try:
70        run_example()
71    except (KeyboardInterrupt, SystemExit) as exErr:
72        print("\nEnding Example 1")
73        sys.exit(0)