??? 11/25/09 16:43 Read: times |
#171164 - Writing to specific address Responding to: ???'s previous message |
Hello members,
I need to ask something about the 24C256. According to the datasheet i have to give a 2 byte address. now using the i2c format, can i write two bytes one by one. My main program looks like this. Address to which data is to be written - 0xAAAAh : 1010101010101010 #include<I2C.h> #include<generic.h> void main() { char BYTE_GET = 0x00,DATA_ = 0x11; GREEN_LED = 0;//Just An indication for my hardware YELLOW_LED = 0;//Just An indication for my hardware sec_wait(1); GREEN_LED = 1;//Just An indication for my hardware YELLOW_LED = 1;//Just An indication for my hardware sec_wait(1); /********WRITE TO ADDRESS********/ i2c_transmit_start(); i2c_transmit_byte(0xA0); i2c_transmit_byte(0xAA);//First word address i2c_transmit_byte(0xAA);//Second word address i2c_transmit_byte(DATA_); i2c_transmit_stop(); /********READ FROM ADDRESS*******/ i2c_transmit_start(); i2c_transmit_byte(0xA0); i2c_transmit_byte(0xAA);//First word address i2c_transmit_byte(0xAA);//Second word address i2c_transmit_start(); i2c_transmit_byte(0xA1); BYTE_GET = i2c_receive_byte(I2C_NAK); i2c_transmit_stop(); if(BYTE_GET == DATA_)//here we compare the data that was written to that we received. GREEN_LED = 0;//GREEN indication if they match else YELLOW_LED = 0;//YELLOW if they do not match sec_wait(1); GREEN_LED = 1; YELLOW_LED = 1; sec_wait(1); DATA_ ++;//now i increment the data so that the next time this incremented character is written } |
Topic | Author | Date |
AT24C256 | 01/01/70 00:00 | |
help | 01/01/70 00:00 | |
BitBang's Amost Always.... | 01/01/70 00:00 | |
Why use void functions | 01/01/70 00:00 | |
thanks | 01/01/70 00:00 | |
Writing to specific address | 01/01/70 00:00 | |
Send sensible address values. | 01/01/70 00:00 | |
I2C_0.0.zip | 01/01/70 00:00 | |
no luck, | 01/01/70 00:00 | |
You have more pins to mis-wire. | 01/01/70 00:00 | |
i2c used, What should be the address | 01/01/70 00:00 | |
Read Murray's excellent Help Files | 01/01/70 00:00 | |
Incorrect reply | 01/01/70 00:00 | |
Please take some time to READ the Help | 01/01/70 00:00 | |
single byte read write working | 01/01/70 00:00 | |
I2C_0.1.zip released!![]() | 01/01/70 00:00 |