MQX Software Solutions中的主题 Re: MQX GPIO setting quesion

MQX GPIO setting quesion

miniwang — Fri, 25 Jan 2013 08:17:20 GMT

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");

}

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

Re: MQX GPIO setting quesion

drummer — Fri, 25 Jan 2013 20:29:27 GMT

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;

}

Re: MQX GPIO setting quesion

miniwang — Tue, 29 Jan 2013 02:56:55 GMT

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.

Re: MQX GPIO setting quesion

c0170 — Tue, 29 Jan 2013 06:28:54 GMT

Hello Mini Wang,

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

Regards,

MartinK