How to read 16 bit of data using I2C/TWI Protocol

[Amit]

Hi friends

 I have slave device INA219 which has 16 bit resister, and i have to read this 16 bit resister using I2C/TWI Protocol

my confussion is I2C has Data resister(TWDR) 8bit then how to read 16 bit ?

 

Here i have written I2C/TWI Read function 

 

 

void TWI_read_data(void)

{

TWCR=(1<<TWINT)|(1<<TWEN);    // Clear TWI interrupt flag,Enable TWI

while (!(TWCR & (1<<TWINT))); // Wait till complete TWDR byte transmitted

while((TWSR & 0xF8) != 0x58); // Check for the acknoledgement

recv_data=TWDR;

PORTB=recv_data;

 

[Vara Ashishkumar]

Hye Amit,

I2C protocol read single byte at a time. INA219 has 16 bit register which is acess in two 8 bytes via I2C Interface. As my opinion repeat two time process of read data.

Try it….

 

[Author]

Posts