topic Re: LPC54608 I2C write problem in LPC Microcontrollers

LPC54608 I2C write problem

prathap_ponnuch — Sun, 19 Jul 2020 14:18:30 GMT

Hi all,

We are using LPC54608 mcu. In this we tried i2c based eeprom device read and write.

Data write we followed:

void data_write(uint8_t Byte_address, uint8_t value){
I2C_MasterStart(((I2C_Type *)(I2C2_BASE)), 0x50U, kI2C_Write);
I2C_MasterWriteBlocking(((I2C_Type *)(I2C2_BASE)), &Byte_address, 1, kI2C_TransferNoStopFlag);
I2C_MasterWriteBlocking(((I2C_Type *)(I2C2_BASE)), &value, 1, 0);
I2C_MasterStop(((I2C_Type *)(I2C2_BASE)));
//delay();
}

Inside this I2C_MasterWriteBlocking function there is one more function called

status = I2C_PendingStatusWait(base);

first time (Byte_address)I2C_MasterWriteBlocking we received status = 0x805 but second time during value write this status value becomes 0x809 so it skipped without writing data into base->MSTDAT register.

Where i missed?

how to solve this.

Thanks in advance.

Regards,

prathap

Re: LPC54608 I2C write problem

Alice_Yang — Mon, 20 Jul 2020 08:32:39 GMT

Hello prathap ponnuchamy,

0x809 meaning NACK Data. Slave NACKed transmitted data.

so please check whether address and sub address is right? Also check I2C slave work well?

Regards,

Alice

Re: LPC54608 I2C write problem

prathap_ponnuch — Mon, 27 Jul 2020 04:59:59 GMT

Hi Alice,

Problem solved its pinmux configuration issue.

Thanks for your support.

Regards,

prathap

Re: LPC54608 I2C write problem

Alice_Yang — Mon, 27 Jul 2020 08:45:13 GMT

OK, thanks for your sharing.