/*******************************************************************************
* Function Name : LCD_WriteRAM_Prepare
* Description : Prepare to write to the LCD RAM.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void LCD_WriteRAM_Prepare(void)
{
LCD_WriteRegIndex(R34); /* Select GRAM Reg */
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);
}
/*******************************************************************************
* Function Name : LCD_ReadReg
* Description : Reads the selected LCD Register.
* Input : None
* Output : None
* Return : LCD Register Value.
*******************************************************************************/
u16 LCD_ReadReg(u8 LCD_Reg)
{
vu16 tmp = 0;
vu8 i = 0;
/* SPI3 prescaler: 4 */
SPI3->CR1 &= 0xFFC7;
SPI3->CR1 |= 0x0008;
/* Write 16-bit Index (then Read Reg) */
LCD_WriteRegIndex(LCD_Reg);
/* Read 16-bit Reg */
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
for(i = 0; i < 5; i++) {
SPI_I2S_SendData(SPI3, 0xFF);
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
/* One byte of invalid dummy data read after the start byte */
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) {
vBlockToWait( 1 );
}
SPI_I2S_ReceiveData(SPI3);
}
SPI_I2S_SendData(SPI3, 0xFF);
/* Read upper byte */
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
/* Read lower byte */
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) {
vBlockToWait( 1 );
}
tmp = SPI_I2S_ReceiveData(SPI3);
SPI_I2S_SendData(SPI3, 0xFF);
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
/* Read lower byte */
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) {
vBlockToWait( 1 );
}
tmp = ((tmp & 0xFF) << 8) | SPI_I2S_ReceiveData(SPI3);
LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);
/* SPI3 prescaler: 2 */
SPI3->CR1 &= 0xFFC7;
return tmp;
}
/**
* @brief Reads the selected LCD Register.
* @param None
* @retval LCD Register Value.
*/
uint16_t LCD_ReadReg(uint8_t LCD_Reg)
{
uint16_t tmp = 0;
uint8_t i = 0;
/* LCD_SPI prescaler: 4 */
LCD_SPI->CR1 &= 0xFFC7;
LCD_SPI->CR1 |= 0x0008;
/* Write 16-bit Index (then Read Reg) */
LCD_WriteRegIndex(LCD_Reg);
/* Read 16-bit Reg */
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
for(i = 0; i < 5; i++)
{
SPI_I2S_SendData(LCD_SPI, 0xFF);
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
{
}
/* One byte of invalid dummy data read after the start byte */
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
{
}
SPI_I2S_ReceiveData(LCD_SPI);
}
SPI_I2S_SendData(LCD_SPI, 0xFF);
/* Read upper byte */
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
{
}
/* Read lower byte */
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
{
}
tmp = SPI_I2S_ReceiveData(LCD_SPI);
SPI_I2S_SendData(LCD_SPI, 0xFF);
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
{
}
/* Read lower byte */
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
{
}
tmp = ((tmp & 0xFF) << 8) | SPI_I2S_ReceiveData(LCD_SPI);
LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
/* LCD_SPI prescaler: 2 */
LCD_SPI->CR1 &= 0xFFC7;
return tmp;
}
/**
* @brief Writes index to select the LCD register.
* @param LCD_Reg: address of the selected register.
* @retval None
*/
void LCD_WriteRegIndex(uint8_t LCD_Reg)
{
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | SET_INDEX);
/* Write 16-bit Reg Index (High Byte is 0) */
SPI_I2S_SendData(LCD_SPI, 0x00);
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET) {
}
SPI_I2S_SendData(LCD_SPI, LCD_Reg);
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET) {
}
LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}
/**
* @brief Writes to the selected LCD register.
* @param LCD_Reg: address of the selected register.
* @param LCD_RegValue: value to write to the selected register.
* @retval None
*/
void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{
/* Write 16-bit Index (then Write Reg) */
LCD_WriteRegIndex(LCD_Reg);
/* Write 16-bit Reg */
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);
SPI_I2S_SendData(LCD_SPI, LCD_RegValue>>8);
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET) {
}
SPI_I2S_SendData(LCD_SPI, (LCD_RegValue & 0xFF));
while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET) {
}
LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}
/*******************************************************************************
* Function Name : LCD_WriteRegIndex
* Description : Writes index to select the LCD register.
* Input : - LCD_Reg: address of the selected register.
* Output : None
* Return : None
*******************************************************************************/
void LCD_WriteRegIndex(u8 LCD_Reg)
{
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | SET_INDEX);
/* Write 16-bit Reg Index (High Byte is 0) */
SPI_I2S_SendData(SPI3, 0x00);
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
SPI_I2S_SendData(SPI3, LCD_Reg);
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);
}
/*******************************************************************************
* Function Name : LCD_WriteReg
* Description : Writes to the selected LCD register.
* Input : - LCD_Reg: address of the selected register.
* - LCD_RegValue: value to write to the selected register.
* Output : None
* Return : None
*******************************************************************************/
void LCD_WriteReg(u8 LCD_Reg, u16 LCD_RegValue)
{
/* Write 16-bit Index (then Write Reg) */
LCD_WriteRegIndex(LCD_Reg);
/* Write 16-bit Reg */
/* Reset LCD control line(/CS) and Send Start-Byte */
LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);
SPI_I2S_SendData(SPI3, LCD_RegValue>>8);
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
SPI_I2S_SendData(SPI3, (LCD_RegValue & 0xFF));
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET) {
vBlockToWait( 1 );
}
LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);
}