GPIO - arduino pin mapping for STM32F769I-discovery?

[benyBoy]

Posted on April 24, 2017 at 06:35

Hi , I have succesfuly managed to merge the GPIO example code into my project.

I am using the audio application project as the base project.

The GPIO button toggles the LED.

I would like to define 3 GPIO pins as digital ouputs on the arduino headers of the STM32F769I-discovery board

so far I have code below, but can't find the arduino pin : GPIO pin map ?

can arduino pins GPIO ? or should I be doing this a different way ? I just need to toggle 3 pins high and low.

static void EXTI0_GPIO_BEN(void)

{  GPIO_InitTypeDef   GPIO_InitStructure;

  /* Enable GPIOC clock */

  __HAL_RCC_GPIOA_CLK_ENABLE();

// configure gpio pins for reset for external adc dsp and dac devices

// gpio reset for ADC

  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;  GPIO_InitStructure.Pull = GPIO_NOPULL; // no pullup or pull dowm resistors ?  GPIO_InitStructure.Pin = GPIO_PIN_0;  // gpio reset for DSP  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;   GPIO_InitStructure.Pull = GPIO_NOPULL; // no pullup or pull dowm resistors ?   GPIO_InitStructure.Pin = GPIO_PIN_1;   // gpio reset for DAC    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;     GPIO_InitStructure.Pull = GPIO_NOPULL; // no pullup or pull dowm resistors ?     GPIO_InitStructure.Pin = GPIO_PIN_1;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);  /// go initilize pins ?

  // i don't think I need to have interrupts for this ??

 /* Enable and set EXTI line 0 Interrupt to the lowest priority */

 //  HAL_NVIC_SetPriority(EXTI0_IRQn, 2, 0); //  HAL_NVIC_EnableIRQ(EXTI0_IRQn);}

[Tesla DeLorean]

Posted on April 24, 2017 at 21:07

PI8 is Pin 8 on Bank I

GPIO_PIN_8  

ARD_D0 is a net name on the schematic, it connects to PC7 of the STM32

[AvaTar]

Posted on April 25, 2017 at 09:29

are there any other physical GPIO pins available as digital outputs on the STM32F769I-discovery ?

You would need to check the schematics for GPIOs that are routed to a header (CNxx), and are not hooked up (connected) to other periphery, like USB, LCD, etc.

what does PCx , PFx , PAx etc stand for ?

'P' stands for Port, and the next letter is just sequential numbering [A, B, C, ...].

Other vendors (NXP for instance) do count their port with numbers instead (P0, P1, ...).

And finally, the number is the bit number within the port.

So, PC7 is bit 7 of the third port.

[benyBoy]

Posted on April 25, 2017 at 15:44

Hi AvaTar , understanding the GPIO port A,B,C - J did it thanks so much !

ARD_D2, ARD_D4 & ARD_D7 are not shared with anything else and work. have'nt tried any others yet.

GPIO_InitTypeDef GPIO_InitStructure;
__HAL_RCC_GPIOC_CLK_ENABLE();

// gpio arduino pins

GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStructure.Pull = GPIO_PULLUP; // GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_0 | GPIO_PIN_3; // ARD_D2=PJ1 | ARD_D4=PJ0 | ARD_D7=PJ3 GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;

HAL_GPIO_Init(GPIOJ, &GPIO_InitStructure); // initialise GPIO 'J' port !

HAL_GPIO_TogglePin(GPIOJ, GPIO_PIN_1); // ARD_D1 PJ1

HAL_GPIO_TogglePin(GPIOJ, GPIO_PIN_0); // ARD_D4 PJ0 HAL_GPIO_TogglePin(GPIOJ, GPIO_PIN_3); // ARD_D7 PJ3

// HAL_GPIO_WritePin(GPIOJ, GPIO_PIN_1, GPIO_PIN_SET); //GPIO_PIN_SET ( on ) GPIO_PIN_RESET ( off )

// HAL_GPIO_WritePin(GPIOJ, GPIO_PIN_0, GPIO_PIN_SET); // HAL_GPIO_WritePin(GPIOJ, GPIO_PIN_3, GPIO_PIN_SET);