Kinetis MicrocontrollersのトピックRe: Bare metal UART Port Initialization Problem on TWR-K70

Bare metal UART Port Initialization Problem on TWR-K70

hasanoksak — Thu, 03 Mar 2016 14:29:41 GMT

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.

mjbcswitzerland — Thu, 03 Mar 2016 15:59:52 GMT

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

Regards

Mark

Robin_Shen — Mon, 07 Mar 2016 02:45:03 GMT

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

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hasanoksak — Tue, 08 Mar 2016 13:17:51 GMT

Hi Mark Butcher,

It worked when the clock is enabled,

Thanks,

hasanoksak — Tue, 08 Mar 2016 13:19:55 GMT

Now it work,