MQX GPIO setting quesion

[miniwang]

Hi All,

There is a question about GPIO setting.

I would like to open a gpio file containing pin setting. The code as below. After open the output_set, all of them are set as output, but the pin status only BSP_2972_STANDBY and BSP_2972_RST (D0,D7) are correct. In another words, BSP_9127_RST,BSP_HS_8524_MUTE,BSP_HS_8524_MODE (E24,E25,E26) are set as output LOW.(expect HIGH)

Why I can't control the pin status?

Thank you in advance.

Mini

The environment is [MQX3.8.1] & [CW10.2].

The chip is K20DN512.

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

#define BSP_9127_RST               (GPIO_PORT_E | GPIO_PIN24)   

#define BSP_2972_STANDBY       (GPIO_PORT_D | GPIO_PIN0)

#define BSP_2972_RST               (GPIO_PORT_D | GPIO_PIN7)

#define BSP_HS_8524_MUTE       (GPIO_PORT_E | GPIO_PIN25)

#define BSP_HS_8524_MODE       (GPIO_PORT_E | GPIO_PIN26)

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

    GPIO_PIN_STRUCT output_set[] = {

        BSP_9127_RST              | GPIO_PIN_STATUS_1,

        BSP_2972_STANDBY     | GPIO_PIN_STATUS_0,

        BSP_2972_RST              | GPIO_PIN_STATUS_1,

        BSP_HS_8524_MUTE     | GPIO_PIN_STATUS_1,

        BSP_HS_8524_MODE    | GPIO_PIN_STATUS_1,

        GPIO_LIST_END

    };

    /* Open and set port pins as output */

    output_port = fopen("gpio:write", (char_ptr) &output_set);

    if (NULL == output_port)

    {

        printf("Open to output_port  failed.\n");

    }

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

[drummer]

you have to issue the ioctl command or nothing gets done

for example: I am multiplexing my analog inputs and need to change the address selector through the GPIO.

uint_32 unc500_scan_vinp(ADC_RESULT_STRUCT * result,uint_8 selector )

{

    ADC_RESULT_STRUCT data;

  uint_32 err;

  if(selector & 1)

  a2d_input_slct[0] |= GPIO_PIN_STATUS_1;

  else

  a2d_input_slct[0] &= ~GPIO_PIN_STATUS_1;

  if(selector & 2)

  a2d_input_slct[1] |= GPIO_PIN_STATUS_1;

  else

  a2d_input_slct[1] &= ~GPIO_PIN_STATUS_1;

  if(selector & 4)

  a2d_input_slct[2] |= GPIO_PIN_STATUS_1;

  else

  a2d_input_slct[2] &= ~GPIO_PIN_STATUS_1;

  ioctl(a2d_selector_fh,GPIO_IOCTL_WRITE, (char_ptr) &a2d_input_slct);

    ioctl(adc8_fh, IOCTL_ADC_FIRE_TRIGGER, (pointer) ADC_TRIGGER_8);

    if (_lwevent_wait_ticks(&evn_vinp,1,TRUE,0) != MQX_OK)

    {

       return FALSE;

    }

    if (_lwevent_clear(&evn_vinp,0x01) != MQX_OK)

    {

       return FALSE;

    }

  err = read(adc8_fh,& data, sizeof(data ));

    result -> result = data.result;

  return err;

}

[miniwang · Accepted solution]

Thanks Rick,

I can control the pin correct when using "ioctl".  the problem is when I wanna open a gpio file containing pin setting, some of the pins are not correct.

There is a MQX bug I found (For Kinetis). For your reference.

in mqx\source\io\gpio\kgpio\io_gpio_kgpio.c

line number: 322    uint_8    pin;

It should be           uint_32 pin;

cause the width of the GPIO register is 32bits, if give it a byte, only bit 0~7 can work correctly.

that's why some of the pins are correct(D0,D7), and some of them(E24,E25,E26) are not.

[c0170]

Hello Mini Wang,

We will investigate it, however it seems to be obviously incorrectly defined. Thank you for reporting the bug.

Regards,

MartinK