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  1. /*
  2.  * Mega328_I2C_EEPROM.c
  3.  *
  4.  * Created: 10/30/2016 10:44:51 PM
  5.  *  Author: jgmDESIGNS-Laptop
  6.  */
  7.  
  8. #ifndef F_CPU
  9. #define F_CPU 16000000UL
  10. #endif
  11. #include <avr/io.h>
  12. #include <stdio.h>
  13. #include <stdint.h>
  14. #include <stdlib.h>
  15. #include <util/delay.h>
  16. #include <avr/interrupt.h>
  17. #include <string.h>
  18. #include <avr/pgmspace.h>
  19.  
  20. #include "i2cmaster.h"
  21.  
  22.  
  23. #define Dev_24LC08B  0xA0      // device address of EEPROM 24LC88, see datasheet	<---jgmdesigns changed device name and address for device - See datasheet
  24.  
  25.  
  26.  
  27. int main(void){
  28.  
  29.    unsigned char ret;
  30.  
  31.    DDRB  = 0x0f;                             // use LOWER pins on port B for output <---jgmdesigns changed PINS USED
  32.    PORTB = 0x0f;                             // (active HIGH LED's )	<---jgmdesigns changed to ACTIVE HIGH
  33.  
  34.    i2c_init();                               // init I2C interface
  35.  
  36.    /* write 0x75 to eeprom address 0x05 (Byte Write) */
  37.    ret = i2c_start(Dev_24LC08B+I2C_WRITE);   // set device address and write mode
  38.    if ( ret ){
  39.       /* failed to issue start condition, possibly no device found */
  40.       i2c_stop();
  41.       PORTB=0x00;                            // activate all 8 LED to show error */
  42.    }else{
  43.    /* issuing start condition ok, device accessible */
  44.       i2c_write(0x05);                       // write address = 5
  45.       i2c_write(0x75);                       // ret=0 -> Ok, ret=1 -> no ACK
  46.       i2c_stop();                            // set stop conditon = release bus
  47.  
  48.       /* write ok, read value back from eeprom address 0x05, wait until
  49.        the device is no longer busy from the previous write operation */
  50.       i2c_start_wait(Dev_24LC08B+I2C_WRITE); // set device address and write mode
  51.       i2c_write(0x05);                       // write address = 5
  52.       i2c_rep_start(Dev_24LC08B+I2C_READ);   // set device address and read mode
  53.       ret = i2c_readNak();                   // read one byte
  54.       i2c_stop();
  55.  
  56.       PORTB = ~ret;                          // output byte on the LED's
  57.  
  58.       /* write 0x70,0x71,072,073 to eeprom address 0x00..0x03 (Page Write),
  59.        wait until the device is no longer busy from the previous write operation */
  60.       i2c_start_wait(Dev_24LC08B+I2C_WRITE);  // set device address and write mode
  61.       i2c_write(0x00);                        // write start address = 0
  62.       i2c_write(0x01);                        // write data to address 0	<---jgmdesigns changed value for demo
  63.       i2c_write(0x02);                        //    "    "   "    "    1	<---jgmdesigns changed value for demo
  64.       i2c_write(0x04);                        //    "    "   "    "    2	<---jgmdesigns changed value for demo
  65.       i2c_write(0x08);                        //    "    "   "    "    3	<---jgmdesigns changed value for demo
  66.       i2c_stop();                             // set stop conditon = release bus
  67.  
  68.       /* write ok, read value back from eeprom address 0..3 (Sequencial Read),
  69.        wait until the device is no longer busy from the previous write operation */
  70.       i2c_start_wait(Dev_24LC08B+I2C_WRITE);// set device address and write mode
  71.       i2c_write(0x00);                      // write address = 0
  72.       i2c_rep_start(Dev_24LC08B+I2C_READ);  // set device address and read mode
  73.       ret = i2c_readAck();                  // read one byte form address 0
  74. 		PORTB = ret;		                    //<---jgmdesigns added output for display on LED's
  75. 		_delay_ms(750);		                 //<---jgmdesigns changed - added delay for display on PORTB
  76.       ret = i2c_readAck();                  //  "    "    "    "     "    1
  77. 		PORTB = ret;		                    //<---jgmdesigns added output for display on LED's
  78. 		_delay_ms(750);		                 //<---jgmdesigns changed - added delay for display on PORTB
  79.       ret = i2c_readAck();                  //  "    "    "    "     "    2
  80. 		PORTB = ret;		                    //<---jgmdesigns added output for display on LED's
  81. 		_delay_ms(750);		                 //<---jgmdesigns changed - added delay for display on PORTB
  82.       ret = i2c_readNak();                  //  "    "    "    "     "    3
  83. 		PORTB = ret;		                    //<---jgmdesigns added output for display on LED's
  84. 		_delay_ms(750);		                 //<---jgmdesigns changed - added delay for display on PORTB
  85.       i2c_stop();                           // set stop condition = release bus
  86.  
  87. 		//<---jgmdesigns changed - removed last PORT B write
  88.    }
  89.  
  90.    for(;;);
  91. }
  92.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.c:11:20: fatal error: avr/io.h: No such file or directory
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/kaeo5l
language:
C (gcc 8.3)
created:
7 years ago
visibility:
secret

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