SPI: How to use GPIO external interrupt

[MaCa_2922036]

Hello,

I create a new topic as my previous one has been locked for an unknown reason.

Initial topic:

How to use GPIO external interrupt

My response to ZhengbaoZ_96

So what you propose is the same thing as the option 1 of my initial first message, except the fact you use SPI2 and I use SPI5. Could it impact anything to use SPI5 instead of SPI2 ?

I still don't have any interrupt with my code "option 1".

Thanks

[Zhengbao_Zhang]

Hello:

Sorry, I want a confirm, Are you using a STM32F4xx seriels MCU to communication with 1LD module ?

And need an Interrupt from module to MCU , and want to configure the SPI CS pin as an  INT input also ..

[MaCa_2922036]

Hello,

The MCU used to communicate with the 1LD module is a STM32F769.

The STM32F769 is the master of the SPI and the 1LD module is the slave. So the SPI CS is controlled by the master and I need to activate the interrupt on SPI CS on the 1LD side.

[Zhengbao_Zhang]

Would you please try SPI5 + external GPIO INT mode for a test ?  I think it is not a must to use CS pin as an interrupt input .

and it needs to modify the mode in the firmware,  I have no experience before for this request .

external INT mode should be easy to configure , then you can see if interrupt can be received in your code.

And this is a default mode in our sdk now.

[MaCa_2922036]

Ok. I will try this.

Could you provide me a sample code to easily configure SPI and GPIO external interrupt for the 1LD platform ?

Thanks.

[Zhengbao_Zhang · Accepted solution]

Hi ：

  for specific code, please follow 43438wcd1 platform in the sdk release:

in platform. c:  we defined SDIO and SPI between STM and 43438 .

SDIO and SPI interface is booted with a different hardware setting of strap pin.

/* Wi-Fi SDIO bus pins. Used by WICED/platform/STM32F2xx/WWD/wwd_SDIO.c */

const platform_gpio_t wifi_sdio_pins[] =

{

    [WWD_PIN_SDIO_OOB_IRQ] = { GPIOC,  6 },

    [WWD_PIN_SDIO_CLK    ] = { GPIOC, 12 },

    [WWD_PIN_SDIO_CMD    ] = { GPIOD,  2 },

    [WWD_PIN_SDIO_D0     ] = { GPIOC,  8 },

    [WWD_PIN_SDIO_D1     ] = { GPIOC,  9 },

    [WWD_PIN_SDIO_D2     ] = { GPIOC, 10 },

    [WWD_PIN_SDIO_D3     ] = { GPIOC, 11 },

};

/* Wi-Fi gSPI bus pins. Used by WICED/platform/STM32F2xx/WWD/wwd_SPI.c */

const platform_gpio_t wifi_spi_pins[] =

{

    [WWD_PIN_SPI_IRQ ] = { GPIOC,  9 },

    [WWD_PIN_SPI_CS  ] = { GPIOB, 12 },

    [WWD_PIN_SPI_CLK ] = { GPIOB, 13 },

    [WWD_PIN_SPI_MOSI] = { GPIOB, 15 },

    [WWD_PIN_SPI_MISO] = { GPIOB, 14 },

};

then we can check the WWD_PIN_SPI_IRQ in the code , in the \43xxx_Wi-Fi\WICED\platform\MCU\STM32F4xx\WWD\wwd_spi.c

/* Setup the interrupt input for WLAN_IRQ */

#ifndef WWD_SPI_IRQ_FALLING_EDGE

	platform_gpio_init( &wifi_spi_pins[WWD_PIN_SPI_IRQ], INPUT_HIGH_IMPEDANCE );
	platform_gpio_irq_enable( &wifi_spi_pins[WWD_PIN_SPI_IRQ], IRQ_TRIGGER_RISING_EDGE, spi_irq_handler, 0 );

#else /* WWD_SPI_IRQ_FALLING_EDGE */

	platform_gpio_init( &wifi_spi_pins[WWD_PIN_SPI_IRQ], INPUT_PULL_UP );
	platform_gpio_irq_enable( &wifi_spi_pins[WWD_PIN_SPI_IRQ], IRQ_TRIGGER_FALLING_EDGE, spi_irq_handler, 0 );

#endif /* WWD_SPI_IRQ_FALLING_EDGE */

where we have a GPIO IRQ define, and level define.

[Zhengbao_Zhang]

when you compile the target, you need to choose the MCU-WLAN Interface to SPI also.

Usage: make <target> [download] [run | debug] [JTAG=xxx] [no_dct]

       make run

  <target>

    One each of the following mandatory [and optional] components separated by '-'

      * Application (apps in sub-directories are referenced by subdir.appname)

      * Hardware Platform ($(filter-out common  include README.txt,$(notdir $(wildcard WICED/platforms/*))))

      * [RTOS] ($(notdir $(wildcard WICED/RTOS/*)))

      * [Network Stack] ($(notdir $(wildcard WICED/network/*)))

      * [MCU-WLAN Interface Bus] (SDIO SPI)