Small library for controll the TTL74HC595, who is a SerialIn-ParallelOut
ttl_74HC595.cpp@0:d78bcf13e9ed, 2011-04-27 (annotated)
- Committer:
- trombettamichele
- Date:
- Wed Apr 27 16:21:05 2011 +0000
- Revision:
- 0:d78bcf13e9ed
- Child:
- 1:db4af8094f4c
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
trombettamichele | 0:d78bcf13e9ed | 1 | #include "mbed.h" |
trombettamichele | 0:d78bcf13e9ed | 2 | #include "ttl_74HC595.h" |
trombettamichele | 0:d78bcf13e9ed | 3 | // Small library for controll the TTL74HC595, who is a SerialIn-ParallelOut |
trombettamichele | 0:d78bcf13e9ed | 4 | // Created by Michele Trombetta |
trombettamichele | 0:d78bcf13e9ed | 5 | // Copyright 2010 5OFT. All rights reserved. |
trombettamichele | 0:d78bcf13e9ed | 6 | |
trombettamichele | 0:d78bcf13e9ed | 7 | ttl_74HC595::ttl_74HC595(PinName DS, PinName SH_CLK, PinName ST_CLK, PinName OE): _DS(DS), _SH_CLK(SH_CLK), _ST_CLK(ST_CLK), _OE(OE) { |
trombettamichele | 0:d78bcf13e9ed | 8 | |
trombettamichele | 0:d78bcf13e9ed | 9 | } |
trombettamichele | 0:d78bcf13e9ed | 10 | |
trombettamichele | 0:d78bcf13e9ed | 11 | void ttl_74HC595::send_data(unsigned char data) { |
trombettamichele | 0:d78bcf13e9ed | 12 | for (char i=0; i<8; i++) { |
trombettamichele | 0:d78bcf13e9ed | 13 | _SH_CLK = 0; |
trombettamichele | 0:d78bcf13e9ed | 14 | _DS = data & 0x01; |
trombettamichele | 0:d78bcf13e9ed | 15 | data >>= 1; |
trombettamichele | 0:d78bcf13e9ed | 16 | _SH_CLK = 1; |
trombettamichele | 0:d78bcf13e9ed | 17 | } |
trombettamichele | 0:d78bcf13e9ed | 18 | } |
trombettamichele | 0:d78bcf13e9ed | 19 | |
trombettamichele | 0:d78bcf13e9ed | 20 | void ttl_74HC595::store_data() { |
trombettamichele | 0:d78bcf13e9ed | 21 | _ST_CLK = 1; |
trombettamichele | 0:d78bcf13e9ed | 22 | _ST_CLK = 0; |
trombettamichele | 0:d78bcf13e9ed | 23 | } |
trombettamichele | 0:d78bcf13e9ed | 24 | |
trombettamichele | 0:d78bcf13e9ed | 25 | void ttl_74HC595::send(unsigned char data) { |
trombettamichele | 0:d78bcf13e9ed | 26 | send_data(data); |
trombettamichele | 0:d78bcf13e9ed | 27 | store_data(); |
trombettamichele | 0:d78bcf13e9ed | 28 | } |
trombettamichele | 0:d78bcf13e9ed | 29 | |
trombettamichele | 0:d78bcf13e9ed | 30 | void ttl_74HC595::setOE(bool enable) { |
trombettamichele | 0:d78bcf13e9ed | 31 | _OE = enable ? 0 : 1; |
trombettamichele | 0:d78bcf13e9ed | 32 | } |