I2C Scanner using Processor Expert for S32K146EVB

Nibesh — Thu, 13 Jun 2024 10:39:33 GMT

Hello I am working on I2C Scanner by using S32K146EVB using Processor Expert.

I am able to initialize I2C and while reading the Acknowledge, it is giving a problem.

I have attached my file for your kind reference..
I hope to hear from you soon..
@VaneB @Senlent

Re: I2C Scanner using Processor Expert for S32K146EVB

Robin_Shen — Sat, 15 Jun 2024 12:25:57 GMT

Hi Nibesh,

Sorry for not testing it for you in the previous question I2C Scanner using S32K146EVB-Q144. But as I mentioned there, since the LPI2C_init of S32K146_Project_LPI2C configure MCFGR1[IGNACK] to Ignore NACK by default, and its LPI2C_Transmit uses MTDR[CMD]=5 by default:101b Generate (repeated) START and transmit address in DATA[7:0]. This transfer expects a NACK to be returned.
So you can't judge the acknowledgement by polling MSR[NDF](NACK Detect Flag).

Please try to test the following code:

void LPI2C_Transmit (uint8_t address)/* Transmit ID and expects an ACK to be returned */
{
LPI2C0->MTDR = (0x04<<8)|((address<<1)|0);
}

LPI2C_DRV_MasterInit(0, &lpi2c1_MasterConfig0, &lpi2c1MasterState);
LPI2C0->MCFGR1 |= LPI2C_MCFGR1_AUTOSTOP_MASK; //Automatic STOP Generation

for(i=1; i<127; i++)

{

// LPI2C_DRV_MasterSetSlaveAddr(INST_LPI2C1, i, false);

LPI2C_Transmit(i);

delay(100);

if((((LPI2C0->MSR) & LPI2C_MSR_NDF_MASK) >> LPI2C_MSR_NDF_SHIFT)==true)

{

LPI2C0->MSR &= LPI2C_MSR_NDF_MASK;

LPUART_DRV_SendDataBlocking(INST_LPUART2, Space, sizeof(Space), TIMEOUT);

}

else

{

sprintf( Buffer,"0x%X", i);

LPUART_DRV_SendDataBlocking(INST_LPUART2, Buffer, sizeof(Buffer), 10000);

}

}

Best Regards,
Robin
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I2C Scanner using Processor Expert for S32K146EVB

Re: I2C Scanner using Processor Expert for S32K146EVB