S32K116>PTC5 as GPIO

[vishal_roy]

PTC5 has a dual role of GPIO + JTAG. By default it is a JTAG pin I would like to know the procedure /registers to configure to set it up as a GPIO.

#GPIO #s32k116‌

[Robin_Shen]

Hi Vishal Roy,

The default pad configurations out of reset are as follows. You need to reconfigure it according to your needs.

4.4 Default pad state.png
PORTC_PCR5[MUX] should reconfigure to 001: Alternative 1 (GPIO)

4.5 Signal Multiplexing sheet.png

12.5.1 Pin Control Register n (PORT_PCRn).png

You can also use the Processor Expert to configure it.

configure GPIO Processor Expert.png

Best Regards,

Robin

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[vishal_roy]

I have set as below

PORTC->PCR[5] |= PORT_PCR_MUX(1) /* Port C5: MUX = GPIO */

PTC->PDDR |= 1u <<5u;     // Port C5: Data Direction= output    1b - Pin is configured as general-purpose output, for the GPIO function.
PTC->PCOR |= 1u <<5u; //Port Clear Output Register (PCOR)  1b - Corresponding bit in PDORn is cleared to logic 0.

But with no toggle on GPIO line

Do i have to set the Lock Bit as well to  "0"

Do let me know if I  am missing any other configuration as this line is MuX with JTAG line and by default is a JTAG pin

[Robin_Shen · Accepted solution]

Hi Vishal Roy,

The default value of PTC5 MUX = 111 Alternative 7 (JTAG_TDI).

PTC5 SSS.png
PORTC->PCR[5] |= PORT_PCR_MUX(1) will not set MUX=001, it will be still 111 due to the default value.
Please refer the method in Processor Expert.

PINS_DRV_Init.png

Best Regards,

Robin

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[vishal_roy]

Thanks Robin!! Was solved.