diff options
Diffstat (limited to 'boards/base/STM32F746-Discovery/stm32f429i_discovery_sdram.c')
-rw-r--r-- | boards/base/STM32F746-Discovery/stm32f429i_discovery_sdram.c | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/boards/base/STM32F746-Discovery/stm32f429i_discovery_sdram.c b/boards/base/STM32F746-Discovery/stm32f429i_discovery_sdram.c deleted file mode 100644 index 3b467b4b..00000000 --- a/boards/base/STM32F746-Discovery/stm32f429i_discovery_sdram.c +++ /dev/null @@ -1,333 +0,0 @@ -#include "ch.h" -#include "hal.h" - -#include "stm32f429i_discovery_sdram.h" -#include "stm32f4xx_fmc.h" - -/** - * @brief Configures the FMC and GPIOs to interface with the SDRAM memory. - * This function must be called before any read/write operation - * on the SDRAM. - * @param None - * @retval None - */ -void SDRAM_Init(void) -{ - FMC_SDRAMInitTypeDef FMC_SDRAMInitStructure; - FMC_SDRAMTimingInitTypeDef FMC_SDRAMTimingInitStructure; - - /* Enable FMC clock */ - rccEnableAHB3(RCC_AHB3ENR_FMCEN, FALSE); - -/* FMC Configuration ---------------------------------------------------------*/ -/* FMC SDRAM Bank configuration */ - /* Timing configuration for 84 Mhz of SD clock frequency (168Mhz/2) */ - /* TMRD: 2 Clock cycles */ - FMC_SDRAMTimingInitStructure.FMC_LoadToActiveDelay = 2; - /* TXSR: min=70ns (6x11.90ns) */ - FMC_SDRAMTimingInitStructure.FMC_ExitSelfRefreshDelay = 7; - /* TRAS: min=42ns (4x11.90ns) max=120k (ns) */ - FMC_SDRAMTimingInitStructure.FMC_SelfRefreshTime = 4; - /* TRC: min=63 (6x11.90ns) */ - FMC_SDRAMTimingInitStructure.FMC_RowCycleDelay = 7; - /* TWR: 2 Clock cycles */ - FMC_SDRAMTimingInitStructure.FMC_WriteRecoveryTime = 2; - /* TRP: 15ns => 2x11.90ns */ - FMC_SDRAMTimingInitStructure.FMC_RPDelay = 2; - /* TRCD: 15ns => 2x11.90ns */ - FMC_SDRAMTimingInitStructure.FMC_RCDDelay = 2; - -/* FMC SDRAM control configuration */ - FMC_SDRAMInitStructure.FMC_Bank = FMC_Bank2_SDRAM; - /* Row addressing: [7:0] */ - FMC_SDRAMInitStructure.FMC_ColumnBitsNumber = FMC_ColumnBits_Number_8b; - /* Column addressing: [11:0] */ - FMC_SDRAMInitStructure.FMC_RowBitsNumber = FMC_RowBits_Number_12b; - FMC_SDRAMInitStructure.FMC_SDMemoryDataWidth = SDRAM_MEMORY_WIDTH; - FMC_SDRAMInitStructure.FMC_InternalBankNumber = FMC_InternalBank_Number_4; - FMC_SDRAMInitStructure.FMC_CASLatency = SDRAM_CAS_LATENCY; - FMC_SDRAMInitStructure.FMC_WriteProtection = FMC_Write_Protection_Disable; - FMC_SDRAMInitStructure.FMC_SDClockPeriod = SDCLOCK_PERIOD; - FMC_SDRAMInitStructure.FMC_ReadBurst = SDRAM_READBURST; - FMC_SDRAMInitStructure.FMC_ReadPipeDelay = FMC_ReadPipe_Delay_1; - FMC_SDRAMInitStructure.FMC_SDRAMTimingStruct = &FMC_SDRAMTimingInitStructure; - - /* FMC SDRAM bank initialization */ - FMC_SDRAMInit(&FMC_SDRAMInitStructure); - - /* FMC SDRAM device initialization sequence */ - SDRAM_InitSequence(); - -} - -/*-- GPIOs Configuration -----------------------------------------------------*/ -/* - +-------------------+--------------------+--------------------+--------------------+ - + SDRAM pins assignment + - +-------------------+--------------------+--------------------+--------------------+ - | PD0 <-> FMC_D2 | PE0 <-> FMC_NBL0 | PF0 <-> FMC_A0 | PG0 <-> FMC_A10 | - | PD1 <-> FMC_D3 | PE1 <-> FMC_NBL1 | PF1 <-> FMC_A1 | PG1 <-> FMC_A11 | - | PD8 <-> FMC_D13 | PE7 <-> FMC_D4 | PF2 <-> FMC_A2 | PG8 <-> FMC_SDCLK | - | PD9 <-> FMC_D14 | PE8 <-> FMC_D5 | PF3 <-> FMC_A3 | PG15 <-> FMC_NCAS | - | PD10 <-> FMC_D15 | PE9 <-> FMC_D6 | PF4 <-> FMC_A4 |--------------------+ - | PD14 <-> FMC_D0 | PE10 <-> FMC_D7 | PF5 <-> FMC_A5 | - | PD15 <-> FMC_D1 | PE11 <-> FMC_D8 | PF11 <-> FMC_NRAS | - +-------------------| PE12 <-> FMC_D9 | PF12 <-> FMC_A6 | - | PE13 <-> FMC_D10 | PF13 <-> FMC_A7 | - | PE14 <-> FMC_D11 | PF14 <-> FMC_A8 | - | PE15 <-> FMC_D12 | PF15 <-> FMC_A9 | - +-------------------+--------------------+--------------------+ - | PB5 <-> FMC_SDCKE1| - | PB6 <-> FMC_SDNE1 | - | PC0 <-> FMC_SDNWE | - +-------------------+ - -*/ - -// /* Common GPIO configuration */ -// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; -// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; -// GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; -// GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; -// -// /* GPIOB configuration */ -// GPIO_PinAFConfig(GPIOB, GPIO_PinSource5 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOB, GPIO_PinSource6 , GPIO_AF_FMC); -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6; -// -// GPIO_Init(GPIOB, &GPIO_InitStructure); -// -// /* GPIOC configuration */ -// GPIO_PinAFConfig(GPIOC, GPIO_PinSource0 , GPIO_AF_FMC); -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; -// -// GPIO_Init(GPIOC, &GPIO_InitStructure); -// -// /* GPIOD configuration */ -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource10, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FMC); -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_8 | -// GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_14 | -// GPIO_Pin_15; -// -// GPIO_Init(GPIOD, &GPIO_InitStructure); -// -// /* GPIOE configuration */ -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource0 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource1 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource7 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource8 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource9 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource10 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource11 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource12 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource13 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource14 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOE, GPIO_PinSource15 , GPIO_AF_FMC); -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | 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_Init(GPIOE, &GPIO_InitStructure); -// -// /* GPIOF configuration */ -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource0 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource1 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource2 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource3 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource4 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource5 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource11 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource12 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource13 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource14 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOF, GPIO_PinSource15 , GPIO_AF_FMC); -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | -// GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | -// GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | -// GPIO_Pin_14 | GPIO_Pin_15; -// -// GPIO_Init(GPIOF, &GPIO_InitStructure); -// -// /* GPIOG configuration */ -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource0 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource1 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource4 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource5 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource8 , GPIO_AF_FMC); -// GPIO_PinAFConfig(GPIOG, GPIO_PinSource15 , GPIO_AF_FMC); -// -// -// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | -// GPIO_Pin_5 | GPIO_Pin_8 | GPIO_Pin_15; -// -// GPIO_Init(GPIOG, &GPIO_InitStructure); - -/** - * @brief Executes the SDRAM memory initialization sequence. - * @param None. - * @retval None. - */ -void SDRAM_InitSequence(void) -{ - FMC_SDRAMCommandTypeDef FMC_SDRAMCommandStructure; - uint32_t tmpr = 0; - -/* Step 3 --------------------------------------------------------------------*/ - /* Configure a clock configuration enable command */ - FMC_SDRAMCommandStructure.FMC_CommandMode = FMC_Command_Mode_CLK_Enabled; - FMC_SDRAMCommandStructure.FMC_CommandTarget = FMC_Command_Target_bank2; - FMC_SDRAMCommandStructure.FMC_AutoRefreshNumber = 1; - FMC_SDRAMCommandStructure.FMC_ModeRegisterDefinition = 0; - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - /* Send the command */ - FMC_SDRAMCmdConfig(&FMC_SDRAMCommandStructure); - - //In the ST example, this is 100ms, but the 429 RM says 100us is typical, and - //the ISSI datasheet confirms this. 1ms seems plenty, and is much shorter than - //refresh interval, meaning we won't risk losing contents if the SDRAM is in self-refresh - //mode -/* Step 4 --------------------------------------------------------------------*/ - /* Insert 1 ms delay */ - chThdSleepMilliseconds(1); - -/* Step 5 --------------------------------------------------------------------*/ - /* Configure a PALL (precharge all) command */ - FMC_SDRAMCommandStructure.FMC_CommandMode = FMC_Command_Mode_PALL; - FMC_SDRAMCommandStructure.FMC_CommandTarget = FMC_Command_Target_bank2; - FMC_SDRAMCommandStructure.FMC_AutoRefreshNumber = 1; - FMC_SDRAMCommandStructure.FMC_ModeRegisterDefinition = 0; - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - /* Send the command */ - FMC_SDRAMCmdConfig(&FMC_SDRAMCommandStructure); - -/* Step 6 --------------------------------------------------------------------*/ - /* Configure a Auto-Refresh command */ - FMC_SDRAMCommandStructure.FMC_CommandMode = FMC_Command_Mode_AutoRefresh; - FMC_SDRAMCommandStructure.FMC_CommandTarget = FMC_Command_Target_bank2; - FMC_SDRAMCommandStructure.FMC_AutoRefreshNumber = 4; - FMC_SDRAMCommandStructure.FMC_ModeRegisterDefinition = 0; - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - /* Send the first command */ - FMC_SDRAMCmdConfig(&FMC_SDRAMCommandStructure); - - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - /* Send the second command */ - FMC_SDRAMCmdConfig(&FMC_SDRAMCommandStructure); - -/* Step 7 --------------------------------------------------------------------*/ - /* Program the external memory mode register */ - tmpr = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_2 | - SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL | - SDRAM_MODEREG_CAS_LATENCY_3 | - SDRAM_MODEREG_OPERATING_MODE_STANDARD | - SDRAM_MODEREG_WRITEBURST_MODE_SINGLE; - - /* Configure a load Mode register command*/ - FMC_SDRAMCommandStructure.FMC_CommandMode = FMC_Command_Mode_LoadMode; - FMC_SDRAMCommandStructure.FMC_CommandTarget = FMC_Command_Target_bank2; - FMC_SDRAMCommandStructure.FMC_AutoRefreshNumber = 1; - FMC_SDRAMCommandStructure.FMC_ModeRegisterDefinition = tmpr; - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - /* Send the command */ - FMC_SDRAMCmdConfig(&FMC_SDRAMCommandStructure); - -/* Step 8 --------------------------------------------------------------------*/ - - /* Set the refresh rate counter */ - /* (7.81 us x Freq) - 20 */ - /* Set the device refresh counter */ - FMC_SetRefreshCount(683); - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } -} - - -/** - * @brief Writes a Entire-word buffer to the SDRAM memory. - * @param pBuffer: pointer to buffer. - * @param uwWriteAddress: SDRAM memory internal address from which the data will be - * written. - * @param uwBufferSize: number of words to write. - * @retval None. - */ -void SDRAM_WriteBuffer(uint32_t* pBuffer, uint32_t uwWriteAddress, uint32_t uwBufferSize) -{ - __IO uint32_t write_pointer = (uint32_t)uwWriteAddress; - - /* Disable write protection */ - FMC_SDRAMWriteProtectionConfig(FMC_Bank2_SDRAM, DISABLE); - - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - - /* While there is data to write */ - for (; uwBufferSize != 0; uwBufferSize--) - { - /* Transfer data to the memory */ - *(uint32_t *) (SDRAM_BANK_ADDR + write_pointer) = *pBuffer++; - - /* Increment the address*/ - write_pointer += 4; - } - -} - -/** - * @brief Reads data buffer from the SDRAM memory. - * @param pBuffer: pointer to buffer. - * @param ReadAddress: SDRAM memory internal address from which the data will be - * read. - * @param uwBufferSize: number of words to write. - * @retval None. - */ -void SDRAM_ReadBuffer(uint32_t* pBuffer, uint32_t uwReadAddress, uint32_t uwBufferSize) -{ - __IO uint32_t write_pointer = (uint32_t)uwReadAddress; - - - /* Wait until the SDRAM controller is ready */ - while(FMC_GetFlagStatus(FMC_Bank2_SDRAM, FMC_FLAG_Busy) != RESET) - { - } - - /* Read data */ - for(; uwBufferSize != 0x00; uwBufferSize--) - { - *pBuffer++ = *(__IO uint32_t *)(SDRAM_BANK_ADDR + write_pointer ); - - /* Increment the address*/ - write_pointer += 4; - } -} - |