334 lines
13 KiB
C
334 lines
13 KiB
C
#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;
|
|
gU32 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 = (gU32)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(gU32* pBuffer, gU32 uwWriteAddress, gU32 uwBufferSize)
|
|
{
|
|
__IO gU32 write_pointer = (gU32)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 */
|
|
*(gU32 *) (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(gU32* pBuffer, gU32 uwReadAddress, gU32 uwBufferSize)
|
|
{
|
|
__IO gU32 write_pointer = (gU32)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 gU32 *)(SDRAM_BANK_ADDR + write_pointer );
|
|
|
|
/* Increment the address*/
|
|
write_pointer += 4;
|
|
}
|
|
}
|
|
|