AM2434: LP - Am2434 I2c communication to EEPROM

Hi Tushar 

It is in interrupt mode

Thanks

In the ISR function of I2C, we are reading the I2C_IRQ_STATUS_RAW[1] bit for the acknowledgment and after receiving success, proceeding with the further I2C operations. 

Regards,

Tushar

Hi Tushar 

we are facing some issue with EEPROM IC where in 5 boards out of 50 boards are showing this error.

below is the waveform of SDA and SCL signals of working board 

below is the waveform of SDA and SCL signals of not working board,you can see the bus is busy and for 5ms and in the firmware is there any fixed wait period? 

You must allow 5ms from the last Write protocol I2C Stop Condition before sending any new I2C command right?.

If you only allow 3.5ms before the ISR times out and throws the error, you will be falsely failing perfectly good AT24CM01 devices.

Hi Yashaswini,

In the EEPROM_AT24C_write() API available in the ind_comms_sdk\mcu_plus_sdk\source\board\eeprom\eeprom_at24c.c file, a wait for 4 ms is already provided.

Please refer below image.

Yashaswini S D said:

we are facing some issue with EEPROM IC where in 5 boards out of 50 boards are showing this error.

Are you facing issue even after calling EEPROM_AT24C_write() API?

Regards,

Tushar

Hi Tushar 

We are using  ind_comms_sdk_am243x_09_02_00_24 , and in C:\ti\ind_comms_sdk_am243x_09_02_00_24\examples\industrial_comms\ethernetip_adapter_demo_original\board\am243x-lp\freertos\drivers\eeprom\CUST_eeprom, I dont see any API being called but in appNvEeprom I  see as below , which does not have any wait period.

Hi Yashaswini,

I can not see the above mentioned API in the specified file. Also, you can call the Clock_usleep function with 5ms timeout for EEPROM write to complete.

Regards,

Tushar

Hi Tushar 

This is mentioned in "C:\ti\ind_comms_sdk_am243x_09_02_00_24\examples\industrial_comms\ethernetip_adapter_demo\appNvEeprom.c" this , can you please check whether this is right function to have the 5ms  delay 

Hi Yashaswini,

Which example from the Indus comm SDK are you using?

Regarsds,

Tushar

Hi Tushar 

we are using ethernetip_adapter_demo example 

Thanks