Schaltplan:
http://en.ofenrohr.net/stuff/74hc595-schaltung.jpeg
Quellcode:
/*
* Copyright (C) 2010 by Tom Vincent Peters
* code@vincent-peters.de
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <avr/io.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "usart.h"
#define VCCBRD_RSCK_DDR DDRC
#define VCCBRD_RSCK_PORT PORTC
#define VCCBRD_RSCK_BIT 0x01 /* 00 00 00 01 */
#define VCCBRD_D1_DDR DDRB
#define VCCBRD_D1_PORT PORTB
#define VCCBRD_D1_BIT 0x01 /* 00 00 00 01 */
#define VCCBRD_D2_DDR DDRB
#define VCCBRD_D2_PORT PORTB
#define VCCBRD_D2_BIT 0x02 /* 00 00 00 10 */
#define VCCBRD_D3_DDR DDRB
#define VCCBRD_D3_PORT PORTB
#define VCCBRD_D3_BIT 0x04 /* 00 00 01 00 */
#define VCCBRD_D4_DDR DDRB
#define VCCBRD_D4_PORT PORTB
#define VCCBRD_D4_BIT 0x08 /* 00 00 10 00 */
static uint8_t verbose;
char str_action[] PROGMEM = "action (help=h): ";
char str_help[] PROGMEM = "h: help\r\n"
"p: tootle pulsing (only test leds with pulsing turned on!)\r\n"
"s: set data which will be sent to the board\r\n"
"i: print data, pulse state and other stuff\r\n"
"r: resend data (in pulsing mode data is resend automatically)\r\n"
"v: verbose messages (clutters display with pulsing on!)\r\n"
"k: send one low bit on D1 (triggers RSCK)\r\n"
"K: send one high bit on D1 (triggers RSCK)\r\n"
"a,b,c,d,e: set D1,D2,D3,D4,RSCK to high\r\n"
"A,B,C,D,E: set D1,D2,D3,D4,RSCK to low\r\n"
"use arrow keys to manipulate data:\r\n"
"LEFT: <<=1 on all bytes of data\r\n"
"RIGHT: >>=1 on all bytes of data\r\n"
"UP: +=1 on all bytes of data\r\n"
"DOWN: -=1 on all bytes of data\r\n"
"pulsing is turned on by default\r\n"
"data is initialized to zero\r\n";
char str_data[] PROGMEM = "data: ";
char str_input[] PROGMEM = "pls write 32 bit hex val: ";
char str_flush[] PROGMEM = "data written to vccbrd...";
char str_unkown[] PROGMEM = "dunno what to do!";
char str_pulse[] PROGMEM = "pulse: ";
char str_verbose[] PROGMEM = "verbose: ";
char str_pins[] PROGMEM = "vccbrd_d[1-4]: ";
char str_left[] PROGMEM = "<<=1 on every byte of data results in: 0x";
char str_right[] PROGMEM = ">>=1 on every byte of data results in: 0x";
char str_up[] PROGMEM = "+=1 on every byte of data results in: 0x";
char str_down[] PROGMEM = "-=1 on every byte of data results in: 0x";
char str_hex[] PROGMEM = "0x";
char str_sep[] PROGMEM = ", ";
char str_nl[] PROGMEM = "\r\n";
void send_data(uint8_t data[4]) {
uint8_t i;
uint8_t cmp;
uint8_t out;
cmp=0x80;
while (cmp) {
if (data[0]&cmp) {
VCCBRD_D1_PORT |= VCCBRD_D1_BIT;
out|=VCCBRD_D1_BIT;
} else {
VCCBRD_D1_PORT &= ~(VCCBRD_D1_BIT);
out&=~(VCCBRD_D1_BIT);
}
if (data[1]&cmp) {
VCCBRD_D2_PORT |= VCCBRD_D2_BIT;
out|=VCCBRD_D2_BIT;
} else {
VCCBRD_D2_PORT &= ~(VCCBRD_D2_BIT);
out&=~(VCCBRD_D2_BIT);
}
if (data[2]&cmp) {
VCCBRD_D3_PORT |= VCCBRD_D3_BIT;
out|=VCCBRD_D3_BIT;
} else {
VCCBRD_D3_PORT &= ~(VCCBRD_D3_BIT);
out&=~(VCCBRD_D3_BIT);
}
if (data[3]&cmp) {
VCCBRD_D4_PORT |= VCCBRD_D4_BIT;
out|=VCCBRD_D4_BIT;
} else {
VCCBRD_D4_PORT &= ~(VCCBRD_D4_BIT);
out&=~(VCCBRD_D4_BIT);
}
if (verbose) {
usart_write_hex(out);
usart_progprint(str_sep);
}
VCCBRD_RSCK_PORT |= VCCBRD_RSCK_BIT;
_delay_us(5);
VCCBRD_RSCK_PORT &= ~(VCCBRD_RSCK_BIT);
cmp>>=1;
}
if (verbose) {
usart_progprint(str_nl);
}
VCCBRD_RSCK_PORT |= VCCBRD_RSCK_BIT;
_delay_us(5);
VCCBRD_RSCK_PORT &= ~(VCCBRD_RSCK_BIT);
}
int main() {
uint8_t in;
uint8_t data[4];
uint8_t off_data[4];
uint8_t i;
uint8_t pulse;
uint8_t print_action;
VCCBRD_RSCK_DDR |= VCCBRD_RSCK_BIT;
VCCBRD_D1_DDR |= VCCBRD_D1_BIT;
VCCBRD_D2_DDR |= VCCBRD_D2_BIT;
VCCBRD_D3_DDR |= VCCBRD_D3_BIT;
VCCBRD_D4_DDR |= VCCBRD_D4_BIT;
for (i=0;i<4;i++) {
data[i]=0x00;
off_data[i]=0x00;
}
print_action=1;
pulse=1;
usart_init(9600);
while (1) {
if (print_action) {
usart_progprint(str_action);
print_action=0;
}
in=usart_read_noblock();
if (in!=0) {
usart_write(in);
usart_progprint(str_nl);
}
if (in=='h') {
usart_progprint(str_help);
} else if (in=='k') {
VCCBRD_D1_PORT&=~(VCCBRD_D1_BIT);
VCCBRD_RSCK_PORT |= VCCBRD_RSCK_BIT;
_delay_us(5);
VCCBRD_RSCK_PORT &= ~(VCCBRD_RSCK_BIT);
} else if (in=='K') {
VCCBRD_D1_PORT|=VCCBRD_D1_BIT;
VCCBRD_RSCK_PORT |= VCCBRD_RSCK_BIT;
_delay_us(5);
VCCBRD_RSCK_PORT &= ~(VCCBRD_RSCK_BIT);
} else if (in=='v') {
verbose=verbose?0:1;
usart_progprint(str_verbose);
usart_write_hex(verbose);
usart_progprint(str_nl);
} else if (in=='a') {
VCCBRD_D1_PORT |= VCCBRD_D1_BIT;
} else if (in=='b') {
VCCBRD_D2_PORT |= VCCBRD_D2_BIT;
} else if (in=='c') {
VCCBRD_D3_PORT |= VCCBRD_D3_BIT;
} else if (in=='d') {
VCCBRD_D4_PORT |= VCCBRD_D4_BIT;
} else if (in=='e') {
VCCBRD_RSCK_PORT |= VCCBRD_RSCK_BIT;
} else if (in=='A') {
VCCBRD_D1_PORT &= ~(VCCBRD_D1_BIT);
} else if (in=='B') {
VCCBRD_D2_PORT &= ~(VCCBRD_D2_BIT);
} else if (in=='C') {
VCCBRD_D3_PORT &= ~(VCCBRD_D3_BIT);
} else if (in=='D') {
VCCBRD_D4_PORT &= ~(VCCBRD_D4_BIT);
} else if (in=='E') {
VCCBRD_RSCK_PORT &= ~(VCCBRD_RSCK_BIT);
} else if (in=='i') {
usart_progprint(str_data);
usart_progprint(str_hex);
for (i=0;i<4;i++) {
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
usart_progprint(str_pulse);
usart_write_hex(pulse);
usart_progprint(str_nl);
usart_progprint(str_verbose);
usart_write_hex(verbose);
usart_progprint(str_nl);
} else if (in=='s') {
usart_progprint(str_input);
for (i=0;i<4;i++) {
data[i]=usart_read_hex();
}
usart_progprint(str_nl);
send_data(data);
usart_progprint(str_data);
usart_progprint(str_hex);
for (i=0;i<4;i++) {
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
usart_progprint(str_flush);
usart_progprint(str_nl);
} else if (in=='r') {
usart_progprint(str_data);
usart_progprint(str_hex);
for (i=0;i<4;i++) {
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
send_data(data);
usart_progprint(str_flush);
usart_progprint(str_nl);
} else if (in==0x1B) { /* arrow keys: 0x1b 0x5b [0x41-0x44] */
_delay_ms(5);
if (usart_read_noblock()==0x5B) {
_delay_ms(5);
in=usart_read_noblock();
if (in==0x44) {
usart_progprint(str_left);
for (i=0;i<4;i++) {
data[i]<<=1;
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
}
if (in==0x43) {
usart_progprint(str_right);
for (i=0;i<4;i++) {
data[i]>>=1;
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
}
}if (in==0x41) {
usart_progprint(str_up);
for (i=0;i<4;i++) {
data[i]+=1;
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
}
if (in==0x42) {
usart_progprint(str_down);
for (i=0;i<4;i++) {
data[i]-=1;
usart_write_hex(data[i]);
}
usart_progprint(str_nl);
}
} else if (in=='p') {
pulse=pulse?0:1;
usart_progprint(str_pulse);
usart_write_hex(pulse);
usart_progprint(str_nl);
} else if (in!=0) {
usart_progprint(str_unkown);
usart_progprint(str_nl);
}
if (in!=0) {
print_action=1;
}
if (pulse) {
send_data(off_data);
_delay_us(27);
send_data(data);
_delay_us(3);
}
}
}
Quellcode in Aktion:
action (help=h): h
h: help
p: tootle pulsing (only test leds with pulsing turned on!)
s: set data which will be sent to the board
i: print data, pulse state and other stuff
r: resend data (in pulsing mode data is resent automatically)
v: verbose messages (clutters display with pulsing on!)
k: send one low bit on D1 (triggers RSCK)
K: send one high bit on D1 (triggers RSCK)
a,b,c,d,e: set D1,D2,D3,D4,RSCK to high
A,B,C,D,E: set D1,D2,D3,D4,RSCK to low
use arrow keys to manipulate data:
LEFT: <<=1 on all bytes of data
RIGHT: >>=1 on all bytes of data
UP: +=1 on all bytes of data
DOWN: -=1 on all bytes of data
pulsing is turned on by default
data is initialized to zero
action (help=h): i
data: 0x00000000
pulse: 01
verbose: 00
action (help=h): p
pulse: 00
action (help=h): v
verbose: 01
action (help=h): r
data: 0x00000000
00, 00, 00, 00, 00, 00, 00, 00,
data written to vccbrd...
action (help=h): a // das hier funktioniert: 1 high bit auf U1
action (help=h): e
action (help=h): E
action (help=h): e
action (help=h): E
action (help=h): s // auch hier wird erfolgreich 1 high bit zu U1 gesendet
pls write 32 bit hex val: 01000000
00, 00, 00, 00, 00, 00, 00, 01,
data: 0x01000000
data written to vccbrd...
action (help=h): s // man kann auch beliebige bitfolgen setzen
pls write 32 bit hex val: 99000000
01, 00, 00, 01, 01, 00, 00, 01,
data: 0x99000000
data written to vccbrd...
action (help=h): s // geht ohne probleme
pls write 32 bit hex val: 00ff00ff
0A, 0A, 0A, 0A, 0A, 0A, 0A, 0A,
data: 0x00FF00FF
data written to vccbrd...
action (help=h): s // geht ohne probleme
pls write 32 bit hex val: ffff00ff
0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B,
data: 0xFFFF00FF
data written to vccbrd...
action (help=h): s // geht ohne probleme
pls write 32 bit hex val: 00ffffff
0E, 0E, 0E, 0E, 0E, 0E, 0E, 0E,
data: 0x00FFFFFF
data written to vccbrd...
action (help=h): s // geht gar nicht! (alles 0x00)
pls write 32 bit hex val: ffffffff
0F, 0F, 0F, 0F, 0F, 0F, 0F, 0F,
data: 0xFFFFFFFF
data written to vccbrd...
action (help=h): s // funktioniert halb: U1:0x88, U2:0xff, U3:0xff, U4:0x00
pls write 32 bit hex val: ffffff00
07, 07, 07, 07, 07, 07, 07, 07,
data: 0xFFFFFF00
data written to vccbrd...
action (help=h): s // aufraeumen...
pls write 32 bit hex val: 00000000
00, 00, 00, 00, 00, 00, 00, 00,
data: 0x00000000
data written to vccbrd...
action (help=h): a // U1 bis U3 erhalten 3 high bits, von denen 2
action (help=h): b // ausgegeben werden sollten
action (help=h): c // Messungen ergeben leider folgendes:
action (help=h): e // U1: 0x00, U2: 0x03, U3: 0x03, U4: 0x00
action (help=h): E // das Problem: U1 sollte 0x03 sein
action (help=h): e // wenn ich am U1 Ser Pin messe, werden konstant 5v angezeigt
action (help=h): E
action (help=h): e
action (help=h): E
action (help=h): r // ordnung schaffen
data: 0x00000000
00, 00, 00, 00, 00, 00, 00, 00,
data written to vccbrd...
action (help=h): a // hier soll an alle chips ein high signal uebertragen werden
action (help=h): b // alle Ser Pins sind durchgehend auf 5v und die anderen Pins
action (help=h): c // ebenfalls sind richtig beschaltet (wurde nachgemessen)
action (help=h): d // jedoch sind U1 bis U4 alle 0x00
action (help=h): e // sobald alle 4 pins gleichzeitig aktiviert werden,
action (help=h): E // wird eine 0 ins register gelesen
action (help=h): e // dies ist scheinbar unabhaengig von den chips,
action (help=h): E // da ich mehrere getestet habe
action (help=h): e // der AVR steckt auf einem Arduino board
action (help=h): E