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GPIO_InitTypeDef GPIO_InitStructure = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/* Enable CTRL line GPIO settings */
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_RES);
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_CS);
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_DC);
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_SCK);
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_SDI);
DISPLAY_GPIOCLK_EN(DISPLAY_CLK_SDO);
GPIO_InitStructure.Pin = CTRL_RES;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStructure.Alternate = 0;
HAL_GPIO_Init(DISPLAY_PORT_RES, &GPIO_InitStructure);
GPIO_InitStructure.Pin = CTRL_CS;
HAL_GPIO_Init(DISPLAY_PORT_CS, &GPIO_InitStructure);
GPIO_InitStructure.Pin = CTRL_DC;
HAL_GPIO_Init(DISPLAY_PORT_DC, &GPIO_InitStructure);
/* Set peripheral clock */
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SPI1;
PeriphClkInitStruct.Spi1ClockSelection = RCC_SPI1CLKSOURCE_PLL1Q;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
for(;;){
__NOP();
}
}
DISPLAY_PERIF_CLK(ENABLE);
/* Connect SPI pins to aletenate function */
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
/* SPI SCK pin configuration */
GPIO_InitStructure.Pin = CTRL_SCK;
GPIO_InitStructure.Alternate = SRC_SCK;
HAL_GPIO_Init(DISPLAY_PORT_SCK, &GPIO_InitStructure);
/* SPI MOSI pin configuration */
GPIO_InitStructure.Pin = CTRL_SDI;
GPIO_InitStructure.Alternate = SRC_SDI;
HAL_GPIO_Init(DISPLAY_PORT_SDI, &GPIO_InitStructure);
/* SPI MISO pin configuration */
GPIO_InitStructure.Pin = CTRL_SDO;
GPIO_InitStructure.Alternate = SRC_SDO;
HAL_GPIO_Init(DISPLAY_PORT_SDO, &GPIO_InitStructure);
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/* SPI configuration */
SpiHandle.Instance = LCD_SPI;
SpiHandle.Init.Mode = SPI_MODE_MASTER;
SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT;
SpiHandle.Init.CLKPolarity = SPI_POLARITY_HIGH;
SpiHandle.Init.CLKPhase = SPI_PHASE_2EDGE;
SpiHandle.Init.NSS = SPI_NSS_SOFT;
SpiHandle.Init.BaudRatePrescaler = SPI_BaudPrescale;
SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
SpiHandle.Init.TIMode = SPI_TIMODE_DISABLE;
SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
SpiHandle.Init.CRCPolynomial = 0x7;
SpiHandle.Init.CRCLength = SPI_CRC_LENGTH_8BIT;
SpiHandle.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
SpiHandle.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
SpiHandle.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
SpiHandle.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
SpiHandle.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
SpiHandle.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
SpiHandle.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_ENABLE; /* avoid glitch */
SpiHandle.Init.IOSwap = SPI_IO_SWAP_DISABLE;
SpiHandle.Init.ReadyMasterManagement = SPI_RDY_MASTER_MANAGEMENT_INTERNALLY;
SpiHandle.Init.ReadyPolarity = SPI_RDY_POLARITY_HIGH;
if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
{
/* Capture error */
while (1);
}
/* Enable SPI module */
LCD_SPI->CR1 |= SPI_CR1_SPE;
LCD_SPI->CR1 |= SPI_CR1_CSTART;
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SpiHandle.Init.BaudRatePrescaler = SPI_BaudPrescale;
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#define SPI_BaudPrescale SPI_BAUDRATEPRESCALER_4 /* PLL1Q CLK 100MHz/4 = 25MHz */
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/* DMA controller clock enable */
__HAL_RCC_GPDMA1_CLK_ENABLE();
/* DMA interrupt init */
/* SPILCD_DMA_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SPILCD_DMA_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(SPILCD_DMA_IRQn);
/* Configure DMA request LcdDmaHandle */
LcdDmaHandle.Instance = SPILCD_DMA_CHANNEL;
LcdDmaHandle.Init.Request = SPILCD_DMA_REQEST;
LcdDmaHandle.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
LcdDmaHandle.Init.Direction = DMA_MEMORY_TO_PERIPH;
LcdDmaHandle.Init.SrcInc = DMA_SINC_INCREMENTED;
LcdDmaHandle.Init.DestInc = DMA_DINC_FIXED;
LcdDmaHandle.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;
LcdDmaHandle.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;
LcdDmaHandle.Init.Priority = DMA_LOW_PRIORITY_HIGH_WEIGHT;
LcdDmaHandle.Init.SrcBurstLength = 1;
LcdDmaHandle.Init.DestBurstLength = 1;
LcdDmaHandle.Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0|DMA_DEST_ALLOCATED_PORT0;
LcdDmaHandle.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;
LcdDmaHandle.Init.Mode = DMA_NORMAL;
if (HAL_DMA_Init(&LcdDmaHandle) != HAL_OK)
{
for(;;){
__NOP();
}
}
__HAL_LINKDMA(&SpiHandle,hdmatx,LcdDmaHandle);
if (HAL_DMA_ConfigChannelAttributes(&LcdDmaHandle, DMA_CHANNEL_NPRIV) != HAL_OK)
{
for(;;){
__NOP();
}
}
/* SPI interrupt init */
/* SPILCD_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SPILCD_IRQn, 3, 1);
HAL_NVIC_EnableIRQ(SPILCD_IRQn);
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LcdDmaHandle.Init.Direction = DMA_MEMORY_TO_PERIPH;
LcdDmaHandle.Init.SrcInc = DMA_SINC_INCREMENTED;
LcdDmaHandle.Init.DestInc = DMA_DINC_FIXED;
LcdDmaHandle.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;
LcdDmaHandle.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;
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#define SPIx_TDR8 *(__IO uint8_t *) ((uint32_t)LCD_SPI+0x20)
#define SPIx_RDR8 *(__IO uint8_t *) ((uint32_t)LCD_SPI+0x30)
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inline void SendSPI(uint8_t dat)
{
/* Send byte through the SPI peripheral */
SPIx_TDR8 = dat;
/* Wait to receive a byte */
while (!(LCD_SPI->SR & (SPI_FLAG_RXP)));
/* Drain Rx FIFO */
SPIx_RDR8;
}
inline void SendSPI16(uint16_t dat)
{
SendSPI((uint8_t)(dat>>8));
SendSPI((uint8_t)dat);
}
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/**************************************************************************/
/*!
Write LCD Command.
*/
/**************************************************************************/
inline void ST7789V2_wr_cmd(uint8_t cmd)
{
ST7789V2_DC_CLR(); /* DC=L */
DISPLAY_ASSART_CS(); /* CS=L */
SendSPI(cmd);
DISPLAY_NEGATE_CS(); /* CS=H */
ST7789V2_DC_SET(); /* DC=H */
}
/**************************************************************************/
/*!
Write LCD Data and GRAM.
*/
/**************************************************************************/
inline void ST7789V2_wr_dat(uint8_t dat)
{
DISPLAY_ASSART_CS(); /* CS=L */
SendSPI(dat);
DISPLAY_NEGATE_CS(); /* CS=H */
}
/**************************************************************************/
/*!
Write LCD GRAM.
*/
/**************************************************************************/
inline void ST7789V2_wr_gram(uint16_t gram)
{
DISPLAY_ASSART_CS(); /* CS=L */
SendSPI16(gram);
DISPLAY_NEGATE_CS(); /* CS=H */
}
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/* DMA IRQ Handler */
void SPILCD_DMA_HANDLER(void)
{
HAL_DMA_IRQHandler(&LcdDmaHandle);
}
/* SPI IRQ Handler */
void SPILCD_IRQHandler(void)
{
HAL_SPI_IRQHandler(&SpiHandle);
}
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/* SPI-DMA IRQ Callback */
void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi)
{
if(hspi->Instance == LCD_SPI){
wTransferState = TRANSFER_COMPLETE;
}
}
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/* DMA transaction */
void lcd_dma_transfer(const uint8_t *buff,unsigned int count)
{
/* Disable SPI to change register */
LCD_SPI->CR1 &= ~(SPI_CR1_SPE);
/* Start DMA */
if (HAL_SPI_Transmit_DMA(&SpiHandle, buff, count) != HAL_OK)
{
for(;;){
__NOP();
}
}
/* Wait transfer complete */
while (wTransferState == TRANSFER_WAIT) {};
/* Restore transfer state */
wTransferState = TRANSFER_WAIT;
/* Restore nomal transfer settings */
LCD_SPI->CR2 = 0; /* Restore TSIZE */
LCD_SPI->CFG2 &= ~(SPI_CFG2_COMM_Msk); /* Restore FULL duplex mode */
LCD_SPI->CR1 |= SPI_CR1_SPE; /* Re-enable SPI module */
LCD_SPI->CR1 |= SPI_CR1_CSTART; /* Re-start SPI Trasfer ready */
}
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/* Restore nomal transfer settings */
LCD_SPI->CR2 = 0; /* Restore TSIZE */
LCD_SPI->CFG2 &= ~(SPI_CFG2_COMM_Msk); /* Restore FULL duplex mode */
LCD_SPI->CR1 |= SPI_CR1_SPE; /* Re-enable SPI module */
LCD_SPI->CR1 |= SPI_CR1_CSTART; /* Re-start SPI Trasfer ready */
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