STM32F7 SRAM interface non functional (bug in Hall?)

[megahercas6]

Posted on December 17, 2017 at 11:34

Hello.

I have STM32F767 interfaced with FPGA with 32b SRAM interface ( same board STM32F479, and it works extremely well)

I checked IO pins, at the moment only CS, toggled it manually, FPGA can see it at 109MHz, no problem whats so ever

But when i try to use HALL and SRAM interface, i get nothing.

Here is my config:

void SRAM_Init(void)

{

  GPIO_InitTypeDef              GPIO_InitStruct;

  SRAM_HandleTypeDef            hsram1;

  FMC_NORSRAM_TimingTypeDef     Timing;

 

 

  __HAL_RCC_GPIOA_CLK_ENABLE();

  __HAL_RCC_GPIOD_CLK_ENABLE();

  __HAL_RCC_GPIOE_CLK_ENABLE();

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOG_CLK_ENABLE();

  __HAL_RCC_GPIOH_CLK_ENABLE();

  __HAL_RCC_GPIOI_CLK_ENABLE();

  __HAL_RCC_FMC_CLK_ENABLE()  ;

 

  GPIO_InitStruct.Pin =GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7||GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

 

 

  GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_3|GPIO_PIN_2|GPIO_PIN_1 |GPIO_PIN_0|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_8 |GPIO_PIN_9|GPIO_PIN_11|GPIO_PIN_14|GPIO_PIN_7|GPIO_PIN_10|GPIO_PIN_12|GPIO_PIN_15|GPIO_PIN_13;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_12|GPIO_PIN_15 |GPIO_PIN_13|GPIO_PIN_14;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

 

  GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_13|GPIO_PIN_12|GPIO_PIN_10|GPIO_PIN_9|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_2|GPIO_PIN_0|GPIO_PIN_5|GPIO_PIN_4;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_15|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_12|GPIO_PIN_9|GPIO_PIN_11|GPIO_PIN_8|GPIO_PIN_10;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);

 

  GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_3|GPIO_PIN_2|GPIO_PIN_5 |GPIO_PIN_7|GPIO_PIN_10|GPIO_PIN_6|GPIO_PIN_1 |GPIO_PIN_9|GPIO_PIN_0;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF9_FMC;

  HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

  SRAM_HandleTypeDef sramHandle;

 

  sramHandle.Instance = FMC_NORSRAM_DEVICE;

  sramHandle.Extended = FMC_NORSRAM_EXTENDED_DEVICE;

 

  /* Timing configuration derived from system clock (up to 216Mhz)

     for 108Mhz as SRAM clock frequency */

  Timing.AddressSetupTime      = 2;

  Timing.AddressHoldTime       = 1;

  Timing.DataSetupTime         = 2;

  Timing.BusTurnAroundDuration = 1;

  Timing.CLKDivision           = 2;

  Timing.DataLatency           = 2;

  Timing.AccessMode            = FMC_ACCESS_MODE_A;

 

  sramHandle.Init.NSBank             = FMC_NORSRAM_BANK3;

  sramHandle.Init.DataAddressMux     = FMC_DATA_ADDRESS_MUX_DISABLE;

  sramHandle.Init.MemoryType         = FMC_MEMORY_TYPE_SRAM;

  sramHandle.Init.MemoryDataWidth    = FMC_NORSRAM_MEM_BUS_WIDTH_32;

  sramHandle.Init.BurstAccessMode    = FMC_BURST_ACCESS_MODE_DISABLE;

  sramHandle.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;

  sramHandle.Init.WaitSignalActive   = FMC_WAIT_TIMING_BEFORE_WS;

  sramHandle.Init.WriteOperation     = FMC_WRITE_OPERATION_ENABLE;

  sramHandle.Init.WaitSignal         = FMC_WAIT_SIGNAL_DISABLE;

  sramHandle.Init.ExtendedMode       = FMC_EXTENDED_MODE_DISABLE;

  sramHandle.Init.AsynchronousWait   = FMC_ASYNCHRONOUS_WAIT_DISABLE;

  sramHandle.Init.WriteBurst         = FMC_WRITE_BURST_DISABLE;

  sramHandle.Init.ContinuousClock    = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;

  /* Initialize the SRAM controller */

  if(HAL_SRAM_Init(&sramHandle, &Timing, &Timing) != HAL_OK)

  {

    /* Initialization Error */

    Error_Handler();

  }

}

Ok, first this i didint like, i have defined STM32F767xx in PreProcessor Defined symbols field. That means in same library i have multiple definitions of AF GPIO_AF9_FMC;

Copy lines in order:

#if define(STM32F767xx) || defined(STM32F769xx) || defined(STM32F777xx) || defined(STM32F779xx)

#define GPIO_AF9_FMC           ((uint8_t)0x09U)   /* FMC Alternate Function mapping     */

#endif /* STM32F746xx || STM32F756xx || STM32F767xx || STM32F769xx || STM32F777xx || STM32F779xx */

#define GPIO_AF12_FMC           ((uint8_t)0xCU)  /* FMC Alternate Function mapping                      */

So this is only small thing. Which one is correct one ? Any way, this also does not solve the problem, so i don't know whats wrong....

[megahercas6]

Posted on December 17, 2017 at 11:59

Oh,

for crying out loud, None, and i mean, none of STM32F7 examples will all optimizations levels ( none, low, mid, high) does not produce any activity on SRAM pins. Even example projects, where is writing and reading data and comparing if it's correct. So good job ST with HALL !!!

I knew HALL is buggy, but not that much !!!! SPL worked first time every time. ( since i have STM32F469 that is pin to pin compatible, i know that this board is functional )

And please not, with simple test of GPIO toggle, i can verify that i have good connection between FPGA and STM32F7

IAR ARM Version is 8.20.1.14