Данные с внутреннего буфера контроллера пересылаются в дисплей через DMA, и одновременно с этим происходят операции с SDRAM. Проблема в том, если в этот момент происходит запись в SDRAM, то на дисплее появляются артефакты, и при чтении данных с SDRAM получаются совсем не те данные, которые были записаны. Если отключить дисплей программно, то всё работает отлично. Никаких ошибок нет. Вообще, моя цель такова. Переместить видеобуфер в SDRAM, и оттуда перебрасывать данные в дисплей с помощью DMA. Возможно ли это оформить без артефактов?
Код инициализации дисплея:
CODE
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOE_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__FMC_CLK_ENABLE();
GPIO_InitStruct.Pin = 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_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11
|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1
|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
FMC_NORSRAM_TimingTypeDef Timing;
hsram1.Instance = FMC_NORSRAM_DEVICE;
hsram1.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
/* hsram1.Init */
hsram1.Init.NSBank = FMC_NORSRAM_BANK1;
hsram1.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
hsram1.Init.MemoryType = FMC_MEMORY_TYPE_SRAM;
hsram1.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_16;
hsram1.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE;
hsram1.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
hsram1.Init.WrapMode = FMC_WRAP_MODE_DISABLE;
hsram1.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS;
hsram1.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
hsram1.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
hsram1.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
hsram1.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE;
hsram1.Init.WriteBurst = FMC_WRITE_BURST_DISABLE;
hsram1.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;
/* Timing */
Timing.AddressSetupTime = 10;
Timing.DataSetupTime = 20;
Timing.AddressHoldTime = 0;
Timing.BusTurnAroundDuration = 0;
Timing.CLKDivision = 0;
Timing.DataLatency = 0;
Timing.AccessMode = FMC_ACCESS_MODE_A;
/* ExtTiming */
HAL_SRAM_Init(&hsram1, &Timing, NULL);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_3, GPIO_PIN_SET);
DelayMs(1);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_3, GPIO_PIN_RESET);
DelayMs(10);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_3, GPIO_PIN_SET);
DelayMs(50);
//************* Start Initial Sequence **********//
graph_command(0x00E3, 0x3008); // Set internal timing
graph_command(0x00E7, 0x0012); // Set internal timing
graph_command(0x00EF, 0x1231); // Set internal timing
graph_command(0x0001, 0x0100); // set SS and SM bit
graph_command(0x0002, 0x0700); // set 1 line inversion
//graph_command(0x0003, 0x1030); // ВЕР ОРИЕН, >
graph_command(0x0003, 0x1018); // ГОР ОРИЕН, >
graph_command(0x0004, 0x0000); // Resize register
graph_command(0x0008, 0x0207); // set the back porch and front porch
graph_command(0x0009, 0x0000); // set non-display area refresh cycle ISC[3:0]
graph_command(0x000A, 0x0000); // FMARK function
graph_command(0x000C, 0x0000); // RGB interface setting
graph_command(0x000D, 0x0000); // Frame marker Position
graph_command(0x000F, 0x0000); // RGB interface polarity
//*************Power On sequence ****************//
graph_command(0x0010, 0x0000); // SAP, BT[3:0], AP, DSTB, SLP, STB
graph_command(0x0011, 0x0007); // DC1[2:0], DC0[2:0], VC[2:0]
graph_command(0x0012, 0x0000); // VREG1OUT voltage
graph_command(0x0013, 0x0000); // VDV[4:0] for VCOM amplitude
DelayMs(200); // Dis-charge capacitor power voltage
graph_command(0x0010, 0x1490); // SAP, BT[3:0], AP, DSTB, SLP, STB
graph_command(0x0011, 0x0227); // DC1[2:0], DC0[2:0], VC[2:0]
DelayMs(50); // Delay 50ms
graph_command(0x0012, 0x001C); // Internal reference voltage= Vci;
DelayMs(50); // Delay 50ms
graph_command(0x0013, 0x1A00); // Set VDV[4:0] for VCOM amplitude
graph_command(0x0029, 0x0025); // Set VCM[5:0] for VCOMH
graph_command(0x002B, 0x000E); // Set Frame Rate
DelayMs(50); // Delay 50ms
graph_command(0x0020, 0x0000); // GRAM horizontal Address
graph_command(0x0021, 0x0000); // GRAM Vertical Address
// ----------- Adjust the Gamma Curve ----------//
graph_command(0x0030, 0x0000);
graph_command(0x0031, 0x0506);
graph_command(0x0032, 0x0104);
graph_command(0x0035, 0x0207);
graph_command(0x0036, 0x000F);
graph_command(0x0037, 0x0306);
graph_command(0x0038, 0x0102);
graph_command(0x0039, 0x0707);
graph_command(0x003C, 0x0702);
graph_command(0x003D, 0x1604);
//------------------ Set GRAM area ---------------//
graph_command(0x0050, 0x0000); // Horizontal GRAM Start Address
graph_command(0x0051, 0x00EF); // Horizontal GRAM End Address
graph_command(0x0052, 0x0000); // Vertical GRAM Start Address
graph_command(0x0053, 0x013F); // Vertical GRAM Start Address
graph_command(0x0060, 0xA700); // Gate Scan Line
graph_command(0x0061, 0x0001); // NDL,VLE, REV
graph_command(0x006A, 0x0000); // set scrolling line
//-------------- Partial Display Control ---------//
graph_command(0x0080, 0x0000);
graph_command(0x0081, 0x0000);
graph_command(0x0082, 0x0000);
graph_command(0x0083, 0x0000);
graph_command(0x0084, 0x0000);
graph_command(0x0085, 0x0000);
//-------------- Panel Control -------------------//
graph_command(0x0090, 0x0010);
graph_command(0x0092, 0x0600);
graph_command(0x0007, 0x0133); // 262K color and display ON
DelayMs(50); // Delay 50ms
graph_command(32, 0);
graph_command(33, 0);
graph_command(34, 0);
//for (i = 0; i < 153280; i++)
// graph_data(0);
uint32_t i,j;
for(i=0;i<Y_SIZE;i++)
for(j=0;j<X_SIZE;j++)
LCD_GRAM[i][j] = 0;
LCD_DAT = (volatile uint16_t*)LCD_GRAM;
__DMA2_CLK_ENABLE();
hdma_memtomem_dma2_stream0.Instance = DMA2_Stream0;
hdma_memtomem_dma2_stream0.Init.Channel = DMA_CHANNEL_0;
hdma_memtomem_dma2_stream0.Init.Direction = DMA_MEMORY_TO_MEMORY;
hdma_memtomem_dma2_stream0.Init.PeriphInc = DMA_PINC_ENABLE;
hdma_memtomem_dma2_stream0.Init.MemInc = DMA_MINC_DISABLE;
hdma_memtomem_dma2_stream0.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_memtomem_dma2_stream0.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_memtomem_dma2_stream0.Init.Mode = DMA_NORMAL;
hdma_memtomem_dma2_stream0.Init.Priority = DMA_PRIORITY_LOW;
hdma_memtomem_dma2_stream0.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_memtomem_dma2_stream0.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
hdma_memtomem_dma2_stream0.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_memtomem_dma2_stream0.Init.PeriphBurst = DMA_MBURST_SINGLE;
HAL_DMA_Init(&hdma_memtomem_dma2_stream0);
HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 4, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
dma_pool = 1;
ILI_TIME = Delay_Tick;
tp_step = 0;
HAL_DMA_Start_IT(&hdma_memtomem_dma2_stream0, (uint32_t)LCD_DAT+640, 0x60020000, 38080);
Код инициализации SDRAM
CODE
GPIO_InitTypeDef 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_11|GPIO_PIN_12
|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5
|GPIO_PIN_8|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
GPIO_InitStruct.Pin = 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_PIN_0|GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_14
|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
__FMC_CLK_ENABLE();
FMC_SDRAM_TimingTypeDef SdramTiming;
FMC_SDRAM_CommandTypeDef SdramCommand;
/** Perform the SDRAM1 memory initialization sequence
*/
hsdram1.Instance = FMC_SDRAM_DEVICE;
/* hsdram1.Init */
hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_8;
hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12;
hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_16;
hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_3;
hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_3;
hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_DISABLE;
hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_2;
/* SdramTiming */
SdramTiming.LoadToActiveDelay = 2;
SdramTiming.ExitSelfRefreshDelay = 7;
SdramTiming.SelfRefreshTime = 4;
SdramTiming.RowCycleDelay = 7;
SdramTiming.WriteRecoveryTime = 2;
SdramTiming.RPDelay = 2;
SdramTiming.RCDDelay = 2;
HAL_SDRAM_Init(&hsdram1, &SdramTiming);
SdramCommand.CommandMode = FMC_SDRAM_CMD_CLK_ENABLE;
SdramCommand.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1;
SdramCommand.AutoRefreshNumber = 1;
SdramCommand.ModeRegisterDefinition = 0;
HAL_SDRAM_SendCommand(&hsdram1, &SdramCommand,1000);
SdramCommand.CommandMode = FMC_SDRAM_CMD_PALL;
SdramCommand.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1;
SdramCommand.AutoRefreshNumber = 1;
SdramCommand.ModeRegisterDefinition = 0;
HAL_SDRAM_SendCommand(&hsdram1, &SdramCommand,1000);
SdramCommand.CommandMode = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
SdramCommand.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1;
SdramCommand.AutoRefreshNumber = 8;
SdramCommand.ModeRegisterDefinition = 0;
HAL_SDRAM_SendCommand(&hsdram1, &SdramCommand,1000);
SdramCommand.CommandMode = FMC_SDRAM_CMD_LOAD_MODE;
SdramCommand.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1;
SdramCommand.AutoRefreshNumber = 1;
SdramCommand.ModeRegisterDefinition = (uint32_t)0x0230;
HAL_SDRAM_SendCommand(&hsdram1, &SdramCommand,1000);
SDRAM_8 = (volatile uint8_t *)((uint32_t)0xC0000000);
SDRAM_16 = (volatile uint16_t *)((uint32_t)0xC0000000);
SDRAM_32 = (volatile uint32_t *)((uint32_t)0xC0000000);
Обработчик прерывания DMA дисплея:
CODE
HAL_DMA_IRQHandler(&hdma_memtomem_dma2_stream0);
hdma_memtomem_dma2_stream0_state = HAL_DMA_GetState(&hdma_memtomem_dma2_stream0);
if(hdma_memtomem_dma2_stream0_state == HAL_DMA_STATE_READY_MEM0)
{
if(dma_pool == 0)
{
graph_fps = Delay_Tick-ILI_TIME;
ILI_TIME = Delay_Tick;
if(tp_step == 4) { TP_Get(); tp_step = 0; }
else tp_step++;
graph_command(32, 0);
graph_command(33, 0);
*(volatile uint16_t *)((uint32_t)0x60000000) = 34;
HAL_DMA_Start_IT(&hdma_memtomem_dma2_stream0, (uint32_t)LCD_DAT+638, 0x60020000, 38081);
dma_pool = 1;
}
else if(dma_pool == 1)
{
//HAL_DMA_Start_IT(&hdma_memtomem_dma2_stream0, (uint32_t)LCD_DAT+76800, 0x60020000, 38400);
HAL_DMA_Start_IT(&hdma_memtomem_dma2_stream0, (uint32_t)LCD_DAT, 0x60020000, 38400);
dma_pool = 2;
}
else if(dma_pool == 2)
{
HAL_DMA_Start_IT(&hdma_memtomem_dma2_stream0, (uint32_t)LCD_DAT, 0x60020000, 319);
dma_pool = 0;
}
}
