Hello everyone
where can I find more detail about aMemory array ( the following code):
Detail about how and where the screen pixels information located in the aMemory array.
I have some problem when I use external SRAM as GUI memroy in STM32F407. It's look like that the image within LCD has been shifting upward in the SRAM mode.
Thanks in advance
Hi,
It depends on the LCD driver you are using where the pixel data is stored.
If you are using the GUIDRV_Lin driver the data is stored within the framebuffer which gets not allocated from "aMemory". The framebuffer typically gets allocated within the LCDConf.c and is not done by emWin.
If you are using another driver, e.g. the GUIDRV_FlexColor driver, a buffer of one line gets allocated from "aMemory". In case you are using the GUIDRV_FlexColor driver with a cache enabled a complete screen gets allocated. Unfortunately, you don't have direct access to this buffer.
Which driver are you using?
You also want to double check your SRAM settings.
Regards,
Sven
Hi Sven
Thanks for replying
The configuration is as follows:
#include "GUI.h"
#include "GUIDRV_FlexColor.h"
#ifndef WIN32
#include "ILI9341.h"
#endif
#define XSIZE_PHYS 240
#define YSIZE_PHYS 320
//
// Color conversion
//
#define COLOR_CONVERSION GUICC_565
//
// Display driver
//
#define DISPLAY_DRIVER GUIDRV_FLEXCOLOR
/*********************************************************************
*
* Configuration checking
*
**********************************************************************
*/
#ifndef VXSIZE_PHYS
#define VXSIZE_PHYS XSIZE_PHYS
#endif
#ifndef VYSIZE_PHYS
#define VYSIZE_PHYS YSIZE_PHYS
#endif
#ifndef WIN32
static void LCD_X_8080_16_WriteM01_16(U16 * pData, int NumItems) {
//RS_HIGH;
while (NumItems--) {
LCD->LCD_RAM = *pData;
pData++;
}
}
static void LCD_X_8080_16_ReadM01_16(U16 * pData, int NumItems) {
while (NumItems--) {
*pData = LCD->LCD_RAM;
pData++;
}
}
#endif
#ifndef WIN32
static void _InitController(void)
{
TFT_Init();
}
#endif
void LCD_X_Config(void) {
GUI_DEVICE * pDevice;
CONFIG_FLEXCOLOR Config = {0};
GUI_PORT_API PortAPI = {0};
//
// Set display driver and color conversion
//
pDevice = GUI_DEVICE_CreateAndLink(DISPLAY_DRIVER, COLOR_CONVERSION, 0, 0);
//
// Display driver configuration, required for Lin-driver
//
LCD_SetSizeEx (0, XSIZE_PHYS, YSIZE_PHYS);
LCD_SetVSizeEx (0, VXSIZE_PHYS, VYSIZE_PHYS);
//
// Orientation
//
Config.Orientation = GUI_SWAP_XY | GUI_MIRROR_Y;
GUIDRV_FlexColor_Config(pDevice, &Config);
//
// Set controller and operation mode
//
#ifndef WIN32
PortAPI.pfWrite16_A0 = LCD_WR_REG;
PortAPI.pfWrite16_A1 = LCD_WR_DATA;
PortAPI.pfWriteM16_A1 = LCD_X_8080_16_WriteM01_16;
PortAPI.pfReadM16_A1 = LCD_X_8080_16_ReadM01_16;
GUIDRV_FlexColor_SetFunc(pDevice, &PortAPI, GUIDRV_FLEXCOLOR_F66709, GUIDRV_FLEXCOLOR_M16C0B16);
#endif
}Target is STM32F407 and LCD driver is ILI9341.
SRAM settings is verified by writing and reading back from 8,16 and 32 bit defined variable in the SRAM address range.
Best regard.
Hi,
Your configuration file looks good so far.
You might want to try another read function. Please refer to the API description of GUIDRV_FlexColor_SetReadFunc66709_B16() in the emWin user manual.
You should also check your write functions. It can be possible that the LCD controller expects the data in another order.
Regards,
Sven
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