Bare metal UART Port Initialization Problem on TWR-K70

[hasanoksak]

I started a new project with KDS with PE. I added a PE serial port(UART2) component and it worked as expected.

I start a new project without KDS with PE. In order  to cofigure Port0 pin 16 and pin 17 as Uart, I used below code.

PORTE_PCR16 = (uint32_t)((PORTE_PCR16 & (uint32_t)~(uint32_t)(PORT_PCR_ISF_MASK | PORT_PCR_MUX(0x04))) | (uint32_t)(PORT_PCR_MUX(0x03)));

PORTE_PCR17 = (uint32_t)((PORTE_PCR17 & (uint32_t)~(uint32_t)(PORT_PCR_ISF_MASK | PORT_PCR_MUX(0x04))) | (uint32_t)(PORT_PCR_MUX(0x03)));

When I debug the code with P&E Micro debugger, within these lines the progran jumps to the "Default_Handler".

I tried "PORTE_PCR16 = 0x300;" and "PORTE_PCR17 = 0x300;" as well but the result is same.

Please any commend.

[Robin_Shen]

Hi Hasan,

If you want to use UART2 and PORTE modules, you need enable their clock gates manually first.

The PE has enabled these clock gates automatically.

See below image:

Best Regards,

Robin

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[hasanoksak]

Thanks Robin_Shen ,

Now it work,

[mjbcswitzerland · Accepted solution]

Hi

Enable the clock to the port in SIM_SCGC5 and then the hard fault will not occur.

Regards

Mark

[hasanoksak]

Hi Mark Butcher,

It worked when the clock is enabled,

Thanks,