1 | #include <avr/io.h>
|
2 | #include <util/delay.h>
|
3 | #include <stdint.h>
|
4 | #include <stdlib.h>
|
5 | #include "lcd-routines.h"
|
6 | #include "i2cmaster.h"
|
7 | unsigned char ret;
|
8 | uint8_t GREEN = PB1; //die grüne LED
|
9 | uint8_t RED = PB2; //die rote LED
|
10 | uint8_t LED_ON = 1; //LED einschalten
|
11 | uint8_t LED_OFF = 0; //LED ausschalten
|
12 |
|
13 | #define Dev24C64 0xA0 // device address of EEPROM 24C02, see datasheet
|
14 |
|
15 | void LED(uint8_t LED_COLOR , uint8_t STATUS) //Bsp: LED(GREEN, LED_ON)
|
16 | {
|
17 | if (LED_COLOR == GREEN && STATUS == LED_ON)
|
18 | {
|
19 | DDRB = ( 1 << GREEN ); // PB1 an PORTB als Ausgang setzen (GRÜN)
|
20 | PORTB = (1 << GREEN ); // PB1 grüne LED einschalten
|
21 | _delay_ms(500); // 1/2 Sekunde warten...
|
22 | PORTB &= ~(1<<GREEN); // löscht Bit 2 in PORTB und schaltet LED an PB1 aus
|
23 | }
|
24 | if (LED_COLOR == GREEN && STATUS == LED_OFF)
|
25 | {
|
26 | PORTB &= ~(1<<GREEN); // löscht Bit 2 in PORTB und schaltet LED an PB1 aus
|
27 | }
|
28 | if (LED_COLOR == RED && STATUS == LED_ON)
|
29 | {
|
30 | DDRB = ( 1 << RED ); // PB2 an PORTB als Ausgang setzen (RED)
|
31 | PORTB = (1 << RED ); // PB2 rote LED einschalten
|
32 | _delay_ms(500); // 1/2 Sekunde warten...
|
33 | PORTB &= ~(1<<RED); // löscht Bit 2 in PORTB und schaltet LED an PB2 aus
|
34 | }
|
35 | if (LED_COLOR == RED && STATUS == LED_OFF)
|
36 | {
|
37 | PORTB &= ~(1<<RED); // löscht Bit 2 in PORTB und schaltet LED an PB2 aus
|
38 | }
|
39 | }
|
40 |
|
41 | int main(void)
|
42 | {
|
43 | lcd_init();
|
44 | LCD_CLEAR_DISPLAY;
|
45 |
|
46 | lcd_setcursor( 0, 1 );
|
47 | lcd_string("Kontrollanzeige:");
|
48 |
|
49 | i2c_init(); // initialize I2C library
|
50 |
|
51 | if(!(i2c_start(Dev24C64+I2C_WRITE))) //--> OK
|
52 | {
|
53 | i2c_write(0x05); // write address = 5
|
54 | i2c_write(0x75); // write value 0x75 to EEPROM !
|
55 | i2c_stop(); // set stop conditon = release bus
|
56 | LED(GREEN, LED_ON);
|
57 | }
|
58 | else
|
59 | {
|
60 | lcd_setcursor( 0, 2 );
|
61 | lcd_string("E: Write-Fehler"); /* Fehlermeldung ausgeben ... */
|
62 | LED(RED, LED_ON);
|
63 | }
|
64 |
|
65 | _delay_ms(50);
|
66 |
|
67 | i2c_start_wait(Dev24C64+I2C_WRITE); //device address/write mode;
|
68 | i2c_write(0x05);
|
69 | i2c_rep_start(Dev24C64+I2C_READ); // set device address /read mode
|
70 | ret=i2c_readNak(); // read one byte from EEPROM
|
71 | //
|
72 | // ===> Hier bekomme ich für ret immer den Wert 0 anstatt 0x75
|
73 | //
|
74 | lcd_setcursor( 0, 3 );
|
75 | lcd_string("ret: ");
|
76 | char Buffer[20];
|
77 | itoa( ret, Buffer, 10 );
|
78 | lcd_string( Buffer ); //ret als String ausgeben
|
79 | if (ret == 0x75)
|
80 | {
|
81 | LED(GREEN, LED_ON);
|
82 | }
|
83 | else
|
84 | {
|
85 | LED(RED, LED_ON);
|
86 | }
|
87 |
|
88 | i2c_stop();
|
89 |
|
90 |
|
91 | while(1)
|
92 | {
|
93 | }
|
94 |
|
95 | return 0;
|
96 | }
|
