fleg
/
OpenRTX
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added display API function to set LCD contrast

This commit is contained in:
Silvano Seva 2021-01-26 08:53:42 +01:00
parent e49c6e036c
commit 92870f477f
4 changed files with 38 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
openrtx/include/interfaces/display.h
View File

@ -48,7 +48,7 @@
*
* NOTE: framebuffer allocation is the first operation performed, if fails an
* error message is printed on the virtual COM port and this function returns
* prematurely, without configuring the display.
* prematurely, without configuring the display.
* Thus, a dark screen can be symptom of failed allocation.
*/
void display_init();
@ -61,7 +61,7 @@ void display_init();
* Changes to the framebuffer will not be reflected on the display until
* display_render() or display_renderRows() are called.
*
*
*
* WARNING: no bound check is performed! Do not call free() on the pointer
* returned, doing so will destroy the framebuffer!
* @return pointer to framebuffer.
@ -69,7 +69,7 @@ void display_init();
void *display_getFrameBuffer();
/**
* When called, this function terminates the display driver
* When called, this function terminates the display driver
* and deallocates the framebuffer.
*/
void display_terminate();
@ -96,4 +96,12 @@ void display_render();
*/
bool display_renderingInProgress();
/**
* Set display contrast.
* NOTE: not all the display controllers support contrast control, thus on some
* targets this function has no effect.
* @param contrast: display contrast, normalised value with range 0 - 255.
*/
void display_setContrast(uint8_t contrast);
#endif /* DISPLAY_H */

8
platform/drivers/display/HX83XX_MDx.c
View File

@ -384,7 +384,7 @@ void display_renderRows(uint8_t startRow, uint8_t endRow)
* this one is made of 16 bit variables.
*/
DMA2_Stream7->NDTR = (endRow - startRow) * SCREEN_WIDTH * sizeof(uint16_t);
DMA2_Stream7->PAR = ((uint32_t ) frameBuffer + (startRow * SCREEN_WIDTH
DMA2_Stream7->PAR = ((uint32_t ) frameBuffer + (startRow * SCREEN_WIDTH
* sizeof(uint16_t)));
DMA2_Stream7->M0AR = LCD_FSMC_ADDR_DATA;
DMA2_Stream7->CR = DMA_SxCR_CHSEL /* Channel 7 */
@ -418,3 +418,9 @@ void *display_getFrameBuffer()
{
return (void *)(frameBuffer);
}
void display_setContrast(uint8_t contrast)
{
/* This controller does not support contrast regulation */
(void) contrast;
}

21
platform/drivers/display/UC1701_GD77.c
View File

@ -91,11 +91,9 @@ void display_init()
gpio_clearPin(LCD_CS);
gpio_clearPin(LCD_RS); /* RS low -> command mode */
// sendByteToController(0xE2); /* System Reset */
sendByteToController(0x2F); /* Voltage Follower On */
sendByteToController(0x81); /* Set Electronic Volume = 15 */
/* TODO variable contrast */
sendByteToController(0x15); /* Contrast */
sendByteToController(0x81); /* Set Electronic Volume */
sendByteToController(0x15); /* Contrast, initial setting */
sendByteToController(0xA2); /* Set Bias = 1/9 */
sendByteToController(0xA1); /* A0 Set SEG Direction */
sendByteToController(0xC0); /* Set COM Direction */
@ -130,7 +128,9 @@ void display_renderRow(uint8_t row)
count--;
}
}
for (uint8_t s = 0; s < 8; s++){
for (uint8_t s = 0; s < 8; s++)
{
sendByteToController(tmp[s]);
}
}
@ -138,7 +138,7 @@ void display_renderRow(uint8_t row)
void display_renderRows(uint8_t startRow, uint8_t endRow)
{
for(uint8_t row = startRow; row < endRow; row++)
for(uint8_t row = startRow; row < endRow; row++)
{
gpio_clearPin(LCD_RS); /* RS low -> command mode */
sendByteToController(0xB0 | row); /* Set Y position */
@ -147,7 +147,7 @@ void display_renderRows(uint8_t startRow, uint8_t endRow)
gpio_setPin(LCD_RS); /* RS high -> data mode */
display_renderRow(row);
}
}
void display_render()
@ -166,3 +166,10 @@ void *display_getFrameBuffer()
{
return (void *)(frameBuffer);
}
void display_setContrast(uint8_t contrast)
{
gpio_clearPin(LCD_RS); /* RS low -> command mode */
sendByteToController(0x81); /* Set Electronic Volume */
sendByteToController(contrast >> 2); /* Controller contrast range is 0 - 63 */
}

6
platform/drivers/display/display_libSDL.c
View File

@ -196,3 +196,9 @@ void *display_getFrameBuffer()
{
return (void *) (frameBuffer);
}
void display_setContrast(uint8_t contrast)
{
printf("Setting display contrast to %d\n", contrast);
}