MSPM0G3507: I2C Repeated Start Condition

Hiroyuki Moriyama

Prodigy 40 points

Part Number: MSPM0G3507

Hi, Team

I attempt I2C communication between MSPM0G3507 and LC709203F(Gauge IC).

Referred is sample project: i2c_controller_rw_multibyte_fifo_interrupts.

This project is available for other I2C devices.

But this Gauge IC needs Repeated Start Condition.

Even though I used above project, I could not acquire correct value.

How could I modify this project in order to meet repeated start condition?

IDE: CCS ver. 12.6.0

Board: LP-MSPM0G3507

Best regards,

Hiroyuki

over 1 year ago

0 Helic Chi over 1 year ago

TI__Mastermind 19317 points

Hi, Hiroyuki

Try this demo code:

i2c_controller_rw_repeated_start_fifo_interrupts_LP_MSPM0G3507_nortos_ticlang.zip

BR,

Helic

0 Hiroyuki Moriyama over 1 year ago

Prodigy 40 points

Hi, Helic

Thank you for your quick support.

I guess demo code provided has a bug at line 142 - argument maybe not gTxLen but gRxLen.

141: // I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, gRxLen);
142: DL_I2C_startControllerTransferAdvanced(I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, gTxLen,
143: DL_I2C_CONTROLLER_START_ENABLE, DL_I2C_CONTROLLER_STOP_ENABLE,DL_I2C_CONTROLLER_ACK_DISABLE);

I modified like below:

142: DL_I2C_startControllerTransferAdvanced(I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, gRxLen,

Modified demo code works well, I confirm.

Could you please confirm this issue?

Best regards

Hiroyuki

+1 Helic Chi over 1 year ago in reply to Hiroyuki Moriyama

TI__Mastermind 19317 points

Hi, Hiroyuki

Hiroyuki Moriyama said:
Could you please confirm this issue?

Yes, It my mistake. Thank you very much for your reply.

Regards,

Helic

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MSPM0G3507: I2C Repeated Start Condition