TMS320F28069: R/W bit is sent automatically or manually?

mihir dave

Expert 1025 points

Part Number: TMS320F28069

hi ,i have one question about R/2 bit after slave address.

R/W bit is sent automatically or we have to?

if automatically than how it is done?

over 6 years ago

0 Kevin Allen18 over 6 years ago

TI__Mastermind 45606 points

Hi Mihir Dave,

The R/W bit is sent automatically at the end of the slave address when you start a transmission. It will depend on the state of the I2CMDR.TRX register bit.

0 == read bit

1 == write bit

Best,

Kevin

0 mihir dave over 6 years ago in reply to Kevin Allen18

Expert 1025 points

HI, kevin Thanks for prompt response

so, if i set I2CMDR.TRX bit than it will generate (write bit(0)) after slave address .

and if i reset I2CMDR.TRX bit than it will generate (read bit(1)) after slave address .

right?

Thank you

Your faithfully

Mihir dave

0 Kevin Allen18 over 6 years ago in reply to mihir dave

TI__Mastermind 45606 points

Hi Mihir Dave,

Yes, exactly.

Please see the example code I provided in the below E2E post for an example:

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/773846

See the 'I2CA_ReadFromReg' and 'I2CA_ReadFromManyRegs' functions. Each one will initially transmit control register bytes to the slave, then switch to a master receiver to receive the number of desired bytes.

Best,

Kevin

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28069: R/W bit is sent automatically or manually?