Connection to FPGA with FSMC

guenniause · ‎2016-05-24

Posted on May 24, 2016 at 16:57

Hello.

I’m trying to connect a F207ZG to the Avalon-Bus of an Altera FPGA. I want to use the FSMC of the STM32. Because the STM32 and the FPGA have different clock domains, I configured the FSMC as asynchronous SRAM:

/* FSMC initialization function */

void MX_FSMC_Init(void)

{

FSMC_NORSRAM_TimingTypeDef Timing;

/** Perform the SRAM1 memory initialization sequence

*/

hsram1.Instance = FSMC_NORSRAM_DEVICE;

hsram1.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;

/* hsram1.Init */

hsram1.Init.NSBank = FSMC_NORSRAM_BANK1;

hsram1.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_DISABLE;

hsram1.Init.MemoryType = FSMC_MEMORY_TYPE_SRAM;

hsram1.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;

hsram1.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;

hsram1.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;

hsram1.Init.WrapMode = FSMC_WRAP_MODE_DISABLE;

hsram1.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;

hsram1.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;

hsram1.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;

hsram1.Init.ExtendedMode = FSMC_EXTENDED_MODE_DISABLE;

hsram1.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_ENABLE;

hsram1.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;

/* Timing */

Timing.AddressSetupTime = 1;

Timing.AddressHoldTime = 15;

Timing.DataSetupTime = 1;

Timing.BusTurnAroundDuration = 1;

Timing.CLKDivision = 16;

Timing.DataLatency = 17;

Timing.AccessMode = FSMC_ACCESS_MODE_A;

/* ExtTiming */

HAL_SRAM_Init(&hsram1, &Timing, NULL);

}

I designed an interface FSMC / Avalon in the FPGA. Therefore I want to use the asynchronous wait of FSMC.

But the FSMC_NWAIT signal doesn’t affect the timing of the FSMC.

Does the FSMC_NWAIT signal work in asynchronous mode?

Guenter

waclawek.jan · ‎2016-05-25

Posted on May 25, 2016 at 10:23

Post relevant FSMC and GPIO register content.

JW

guenniause · ‎2016-05-25

Posted on May 25, 2016 at 17:27

Hello Jan,

here the configuration of the GPIO:

void MX_GPIO_Init(void)

{

GPIO_InitTypeDef GPIO_InitStruct;

/* GPIO Ports Clock Enable */

__HAL_RCC_GPIOC_CLK_ENABLE();

__HAL_RCC_GPIOF_CLK_ENABLE();

__HAL_RCC_GPIOH_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE();

__HAL_RCC_GPIOG_CLK_ENABLE();

__HAL_RCC_GPIOE_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();

__HAL_RCC_GPIOD_CLK_ENABLE();

/*Configure GPIO pin : User_Blue_Button_Pin */

// pin 13, port c

GPIO_InitStruct.Pin = User_Blue_Button_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

GPIO_InitStruct.Pull = GPIO_NOPULL;

HAL_GPIO_Init(User_Blue_Button_GPIO_Port, &GPIO_InitStruct);

/*Configure GPIO pins : RMII_MDC_Pin RMII_RXD0_Pin RMII_RXD1_Pin */

// pin 4 and 5, port c

GPIO_InitStruct.Pin = RMII_MDC_Pin|RMII_RXD0_Pin|RMII_RXD1_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF11_ETH;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/*Configure GPIO pins : RMII_REF_CK_Pin RMII_MDIO_Pin RMII_CRS_DV_Pin */

// pin 1, 2 and 7 port a;

GPIO_InitStruct.Pin = RMII_REF_CK_Pin|RMII_MDIO_Pin|RMII_CRS_DV_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF11_ETH;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/*Configure GPIO pin : RMII_TXD1_Pin */

// pin 13, port b

GPIO_InitStruct.Pin = RMII_TXD1_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF11_ETH;

HAL_GPIO_Init(RMII_TXD1_GPIO_Port, &GPIO_InitStruct);

/*Configure GPIO pins : LD3_Pin PB7 */

// pin 14, port b

GPIO_InitStruct.Pin = LD3_Pin|GPIO_PIN_7;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/*Configure GPIO pin : USB_PowerSwitchOn_Pin */

// pin 6, port g

GPIO_InitStruct.Pin = USB_PowerSwitchOn_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

HAL_GPIO_Init(USB_PowerSwitchOn_GPIO_Port, &GPIO_InitStruct);

/*Configure GPIO pin : USB_OverCurrent_Pin */

// pin 6, port g

GPIO_InitStruct.Pin = USB_OverCurrent_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

GPIO_InitStruct.Pull = GPIO_NOPULL;

HAL_GPIO_Init(USB_OverCurrent_GPIO_Port, &GPIO_InitStruct);

/*Configure GPIO pin : PC9 */

// pin 9, port c

GPIO_InitStruct.Pin = GPIO_PIN_9;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

GPIO_InitStruct.Alternate = GPIO_AF0_MCO;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/*Configure GPIO pins : USB_SOF_Pin USB_ID_Pin USB_DM_Pin USB_DP_Pin */

// pin 8, 10, 11 and 12 port a

GPIO_InitStruct.Pin = USB_SOF_Pin|USB_ID_Pin|USB_DM_Pin|USB_DP_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/*Configure GPIO pin : USB_VBUS_Pin */

// pin 9, port a

GPIO_InitStruct.Pin = USB_VBUS_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

GPIO_InitStruct.Pull = GPIO_NOPULL;

HAL_GPIO_Init(USB_VBUS_GPIO_Port, &GPIO_InitStruct);

/*Configure GPIO pins : RMII_TX_EN_Pin RMII_TXD0_Pin */

// pin 11 und 13, port g

GPIO_InitStruct.Pin = RMII_TX_EN_Pin|RMII_TXD0_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF11_ETH;

HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

/*Configure GPIO pin Output Level */

HAL_GPIO_WritePin(GPIOB, LD3_Pin|GPIO_PIN_7, GPIO_PIN_RESET);

/*Configure GPIO pin Output Level */

HAL_GPIO_WritePin(USB_PowerSwitchOn_GPIO_Port, USB_PowerSwitchOn_Pin, GPIO_PIN_RESET);

}

Wich additional information to configuration of FSMC do you need?

Thank you.

Guenter

Walid FTITI_O · ‎2016-05-25

Posted on May 25, 2016 at 18:18

Hi guenni,

I recommend you that you get in touch with the FSMC examples in

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-embedded-software/stm32cubef2.html

wich examplain how to well configure the FSMC controller to access an Synchronous RAM memory.

Examples at this path :

STM32Cube_FW_F2_V1.3.0\Projects\STM322xG_EVAL\Examples\FSMC\FSMC_SRAM_DataMemory

Have a look to this

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https%3a//my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/FSMC%20with%20Synchronous%20Memory&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=707

to ensure that you don't have the same issue

-Hannibal-

waclawek.jan · ‎2016-05-25

Posted on May 25, 2016 at 19:02

Guenter,

I mean, read out the content of the relevant FSMC and GPIO registers after they have been initialized. Then confront them to the RM.

JW

guenniause · ‎2016-05-30

Posted on May 30, 2016 at 15:09

Hello,

I found some information in reference manual RM0090. The asynchronous wait, will be detected 4 HCLK before the end of memory transaction.

Iâ€™ve configured AddressSetupTime = 1 and DataSetupTime = 1. Then the asynchronous wait doesnâ€™t work.

AddressSetupTime must be at least 5.

Thank you for your efforts.

Guenter