/**************************************************************************//**
* @brief Clear the display.
*
* @detail This function clears the display.
*
* @return EMSTATUS code of the operation.
*****************************************************************************/
void Display_clear(void) {
uint16_t cmd;
/* Set SCS */
PAL_GpioPinOutSet(LCD_PORT_SCS, LCD_PIN_SCS);
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send command */
cmd = LS013B7DH03_CMD_ALL_CLEAR;
PAL_SpiTransmit((uint8_t *)&cmd, 2);
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
/* Clear SCS */
PAL_GpioPinOutClear( LCD_PORT_SCS, LCD_PIN_SCS );
}
/**************************************************************************//**
* @brief Clear the display.
*
* @detail This function clears the display.
*
* @return EMSTATUS code of the operation.
*****************************************************************************/
static EMSTATUS DisplayClear ( void )
{
uint16_t cmd;
spi_select(lcd_spi_handle);
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send command */
cmd = LS013B7DH03_CMD_ALL_CLEAR | lcdPolarity;
spi_exchange_bytes(lcd_spi_handle, (uint8_t*)&cmd, NULL, 2);
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
spi_deselect(lcd_spi_handle);
return DISPLAY_EMSTATUS_OK;
}
/* send horizontal pixel array to the display.
* The pixel array has the full width of the display
* and height [in pixels] specified by 'h'
*
* @par pa - pointer to the pixel array
* @par y - start row
* @par h - height of the pixel array
*/
void Display_sendPA(uint32_t const *pa,
uint8_t y, uint8_t h)
{
uint32_t i;
uint8_t const *p = (uint8_t const *)pa;
uint16_t cmd;
/* Need to adjust start row by one because LS013B7DH03 starts
* counting lines from 1, while the DISPLAY interface starts from 0.
*/
++y;
/* Assert SCS */
PAL_GpioPinOutSet( LCD_PORT_SCS, LCD_PIN_SCS );
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send update command and first line address */
cmd = LS013B7DH03_CMD_UPDATE | (y << 8);
PAL_SpiTransmit((uint8_t *)&cmd, 2);
/* send pixels for all lines except the last... */
for (i = 0; i < h - 1; ++i) {
PAL_SpiTransmit((uint8_t *)p, LS013B7DH03_WIDTH/8);
p += (LS013B7DH03_WIDTH/8);
cmd = 0xFFU | ((y + i + 1) << 8);
PAL_SpiTransmit((uint8_t *)&cmd, 2);
}
/* send pixels for the last line */
PAL_SpiTransmit((uint8_t *)p, LS013B7DH03_WIDTH/8);
cmd = 0xFFFFU;
PAL_SpiTransmit((uint8_t *)&cmd, 2);
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
/* De-assert SCS */
PAL_GpioPinOutClear( LCD_PORT_SCS, LCD_PIN_SCS );
}
/**************************************************************************//**
* @brief Clear the display.
*
* @detail This function clears the display.
*
* @return EMSTATUS code of the operation.
*****************************************************************************/
static EMSTATUS DisplayClear ( void )
{
uint16_t cmd;
/* Set SCS */
PAL_GpioPinOutSet( LCD_PORT_SCS, LCD_PIN_SCS );
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send command */
cmd = LS013B7DH03_CMD_ALL_CLEAR | lcdPolarity;
PAL_SpiTransmit ((uint8_t*) &cmd, 2 );
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
/* Clear SCS */
PAL_GpioPinOutClear( LCD_PORT_SCS, LCD_PIN_SCS );
return DISPLAY_EMSTATUS_OK;
}
/**************************************************************************//**
* @brief Inverse polarity across the Liquid Crystal cells in the display.
*
* @detail This function inverses the polarity across the Liquid Crystal cells
* in the LCD. Must be called at least every second.
*
* @return EMSTATUS code of the operation.
*****************************************************************************/
static EMSTATUS DisplayPolarityInverse (void)
{
#ifdef POLARITY_INVERSION_EXTCOMIN
/* Toggle extcomin gpio */
PAL_GpioPinOutToggle( LCD_PORT_EXTCOMIN, LCD_PIN_EXTCOMIN );
#else /* POLARITY_INVERSION_EXTCOMIN */
/* Send a packet with inverted com */
PAL_GpioPinOutSet( LCD_PORT_SCS, LCD_PIN_SCS );
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send polarity command including dummy bits */
PAL_SpiTransmit ((uint8_t*) &lcdPolarity, 2 );
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
PAL_GpioPinOutClear( LCD_PORT_SCS, LCD_PIN_SCS );
/* Invert com polarity */
if (lcdPolarity == 0x00)
{
lcdPolarity = 0x02;
}
else
{
lcdPolarity = 0x00;
}
#endif /* POLARITY_INVERSION_EXTCOMIN */
return DISPLAY_EMSTATUS_OK;
}
/**************************************************************************//**
* @brief Move and show the contents of a pixel matrix buffer onto the display.
*
* @param[in] device Display device pointer.
* @param[in] pixelMatrix Pointer to the pixel matrix buffer to draw.
* @param[in] startColumn Start column on the display where to start
* drawing the pixel matrix. Must be 0 if addressing
* mode is DISPLAY_ADDRESSING_BY_ROWS_ONLY.
* @param[in] width Width in pixel columns of the pixel matrix to draw
* Must be max width of display if the addresssing
* mode is DISPLAY_ADDRESSING_BY_ROWS_ONLY.
* @param[in] startRow Start row on the display where to start drawing
* the pizel matrix.
* @param[in] height Height in pixel rows/lines of the pixel matrix.
*
* @return EMSTATUS code of the operation.
*****************************************************************************/
static EMSTATUS PixelMatrixDraw( DISPLAY_Device_t* device,
DISPLAY_PixelMatrix_t pixelMatrix,
unsigned int startColumn,
unsigned int width,
#ifdef EMWIN_WORKAROUND
unsigned int userStride,
#endif
unsigned int startRow,
unsigned int height )
{
unsigned int i;
uint16_t* p = (uint16_t *)pixelMatrix;
uint16_t cmd;
#ifdef EMWIN_WORKAROUND
int strideGap =
(userStride-width-(LS013B7DH03_CONTROL_BYTES*8)) / 8 / sizeof(uint16_t);
if ((userStride-width) % sizeof(uint16_t))
return DISPLAY_EMSTATUS_INVALID_PARAMETER;
#else
(void) width; /* Suppress compiler warning: unused parameter. */
#endif
(void) startColumn; /* Suppress compiler warning: unused parameter. */
(void) device; /* Suppress compiler warning: unused parameter. */
/* Need to adjust start row by one because LS013B7DH03 starts counting lines
from 1, while the DISPLAY interface starts from 0. */
startRow++;
#ifdef USE_CONTROL_BYTES
/* Setup line addressing in control words. */
pixelMatrixSetup(pixelMatrix, startRow, height
#ifdef EMWIN_WORKAROUND
, userStride
#endif
);
#endif
/* Assert SCS */
PAL_GpioPinOutSet( LCD_PORT_SCS, LCD_PIN_SCS );
/* SCS setup time: min 6us */
PAL_TimerMicroSecondsDelay(6);
/* Send update command and first line address */
cmd = LS013B7DH03_CMD_UPDATE | (startRow << 8);
PAL_SpiTransmit((uint8_t*) &cmd, 2 );
/* Get start address to draw from */
for ( i=0; i<height; i++ ) {
/* Send pixels for this line */
PAL_SpiTransmit((uint8_t*) p,
LS013B7DH03_WIDTH/8 + LS013B7DH03_CONTROL_BYTES);
p+=(LS013B7DH03_WIDTH/8 + LS013B7DH03_CONTROL_BYTES) / sizeof(uint16_t);
#ifndef USE_CONTROL_BYTES
if (i==height-1)
{
cmd = 0xffff;
}
else
{
cmd = 0xff | ((startRow+i+1) << 8);
}
PAL_SpiTransmit((uint8_t*) &cmd, 2 );
#endif
#ifdef EMWIN_WORKAROUND
p += strideGap;
#endif
}
/* SCS hold time: min 2us */
PAL_TimerMicroSecondsDelay(2);
/* De-assert SCS */
PAL_GpioPinOutClear( LCD_PORT_SCS, LCD_PIN_SCS );
return DISPLAY_EMSTATUS_OK;
}
