Gobol
Member level 1
dspic i2c
Hi,
I've tried to use I2C module of dsPIC 30F6014A. I've used pic30 library <i2c.h> to perform I2C communication with 24AA1025 1Mbit serial eeprom from M*crochip.
I've spent many hours debugging, because it didn't work as it is suggested in datasheet and examples.
The initialization code is :
And the problem appear here :
It seems that the SEN bit is resetted too early, or not set fast enough, because this while-loop passes without any delay, even before the START condition is sent to I2C bus.
This situation applies to any bit (TBF, PEN, RSEN, ACKSTAT)...
Anybody has some suggestions ?
Thanks in advance.
Bogusz.
Hi,
I've tried to use I2C module of dsPIC 30F6014A. I've used pic30 library <i2c.h> to perform I2C communication with 24AA1025 1Mbit serial eeprom from M*crochip.
I've spent many hours debugging, because it didn't work as it is suggested in datasheet and examples.
The initialization code is :
Code:
baud = I2cBRG;
config1 = (I2C_ON & I2C_IDLE_CON & I2C_CLK_HLD & I2C_IPMI_DIS & I2C_7BIT_ADD &
I2C_SLW_DIS & I2C_SM_DIS & I2C_GCALL_DIS & I2C_STR_DIS &
I2C_NACK & I2C_ACK_DIS & I2C_RCV_DIS &
I2C_STOP_DIS & I2C_RESTART_DIS & I2C_START_DIS);
OpenI2C(config1,baud);
IdleI2C();And the problem appear here :
Code:
StartI2C();
while(I2CCONbits.SEN ); // while start condition ... waitIt seems that the SEN bit is resetted too early, or not set fast enough, because this while-loop passes without any delay, even before the START condition is sent to I2C bus.
This situation applies to any bit (TBF, PEN, RSEN, ACKSTAT)...
Anybody has some suggestions ?
Thanks in advance.
Bogusz.