MFX_V3 How to use this module in stm32g474e eval board

[10rajeshvr]

Hi,

How to glow LED2 AND LED4 Which is connected through MFX_V3 in eval Board

any sample I2C format for that?

How to wakeup MFX_v3? 

 steps or sample code need to follow to glow Leds

please provide any examples or doc.

thanks

[SofLit]

Hello @10rajeshvr and welcome to the community,

You can inspire from the BSP-LED example of STM32G474E-EVAL provided under this link:

https://github.com/STMicroelectronics/STM32CubeG4/blob/master/Projects/STM32G474E-EVAL/Examples/BSP/Src/led.c

int32_t Led_demo(void)
{
  int32_t  result = 0;

  printf("TEST OF LEDs\n");

  /* Initialize the LEDs */
  if (BSP_LED_Init(LED1) != BSP_ERROR_NONE) result--;
  if (BSP_LED_Init(LED3) != BSP_ERROR_NONE) result--;
#if (USE_BSP_IO_CLASS == 1)
  if (BSP_LED_Init(LED2) != BSP_ERROR_NONE) result--;
  if (BSP_LED_Init(LED4) != BSP_ERROR_NONE) result--;
#endif

  /* Switch on the LEDs */
  printf("Switch on LED1\n");
  if (BSP_LED_On(LED1) != BSP_ERROR_NONE) result--;
  printf("Switch on LED3\n");
  if (BSP_LED_On(LED3) != BSP_ERROR_NONE) result--;

#if (USE_BSP_IO_CLASS == 1)
  printf("Switch on LED2\n");
  if (BSP_LED_On(LED2) != BSP_ERROR_NONE) result--;
  printf("Switch on LED4\n");
  if (BSP_LED_On(LED4) != BSP_ERROR_NONE) result--;
#endif
  /* Check LEDs states */
  if (BSP_LED_GetState(LED1) != 1) result--;
  if (BSP_LED_GetState(LED3) != 1) result--;
#if (USE_BSP_IO_CLASS == 1)
  if (BSP_LED_GetState(LED2) != 1) result--;
  if (BSP_LED_GetState(LED4) != 1) result--;
#endif

  /* Check result */
  if (CheckResult() != 0U) result--;

  /* Toggle the LEDs */
  printf("Switch off LED1\n");
  if (BSP_LED_Toggle(LED1) != BSP_ERROR_NONE) result--;
  printf("Switch off LED3\n");
  if (BSP_LED_Toggle(LED3) != BSP_ERROR_NONE) result--;
#if (USE_BSP_IO_CLASS == 1)
  printf("Switch off LED2\n");
  if (BSP_LED_Toggle(LED2) != BSP_ERROR_NONE) result--;
  printf("Switch off LED4\n");
  if (BSP_LED_Toggle(LED4) != BSP_ERROR_NONE) result--;
#endif

  /* Check LEDs states */
  if (BSP_LED_GetState(LED1) != 0) result--;
  if (BSP_LED_GetState(LED3) != 0) result--;
#if (USE_BSP_IO_CLASS == 1)
  if (BSP_LED_GetState(LED2) != 0) result--;
  if (BSP_LED_GetState(LED4) != 0) result--;
#endif

  /* Check result */
  if (CheckResult() != 0U) result--;

  /* Toggle the LEDs */
  printf("Switch on LED1\n");
  if (BSP_LED_Toggle(LED1) != BSP_ERROR_NONE) result--;
  printf("Switch on LED3\n");
  if (BSP_LED_Toggle(LED3) != BSP_ERROR_NONE) result--;
#if (USE_BSP_IO_CLASS == 1)
  printf("Switch on LED2\n");
  if (BSP_LED_Toggle(LED2) != BSP_ERROR_NONE) result--;
  printf("Switch on LED4\n");
  if (BSP_LED_Toggle(LED4) != BSP_ERROR_NONE) result--;
#endif

  /* Check result */
  if (CheckResult() != 0U) result--;

  /* Switch off the LEDs */
  printf("Switch off LED1\n");
  if (BSP_LED_Off(LED1) != BSP_ERROR_NONE) result--;
  printf("Switch off LED3\n");
  if (BSP_LED_Off(LED3) != BSP_ERROR_NONE) result--;
#if (USE_BSP_IO_CLASS == 1)
  printf("Switch off LED2\n");
  if (BSP_LED_Off(LED2) != BSP_ERROR_NONE) result--;
  printf("Switch off LED4\n");
  if (BSP_LED_Off(LED4) != BSP_ERROR_NONE) result--;
#endif

  /* Check result */
  if (CheckResult() != 0U) result--;

  /* De-Initialize the LEDs */
  if (BSP_LED_DeInit(LED1) != BSP_ERROR_NONE) result--;
  if (BSP_LED_DeInit(LED3) != BSP_ERROR_NONE) result--;
#if (USE_BSP_IO_CLASS == 1)
  if (BSP_LED_DeInit(LED2) != BSP_ERROR_NONE) result--;
  if (BSP_LED_DeInit(LED4) != BSP_ERROR_NONE) result--;
#endif

#if (USE_BSP_IO_CLASS == 1)
  /* Add a call of BSP_IO_DeInit for a clean exit of this test */
  if (BSP_IO_DeInit(0) != BSP_ERROR_NONE) result--;
#endif

  return result;
}

As you can see to use LED2 and LED4 you need to set the define USE_BSP_IO_CLASS to 1 in stm32g474e_eval_conf.h.

Also you need to define USE_IOEXPANDER in the Preprocessor in your IDE.

Hope it helps.