/**
* @brief Performs the TS calibration
* @param None
* @retval None
*/
void Touchscreen_Calibration (void)
{
uint8_t status = 0;
uint8_t i = 0;
TouchscreenCalibration_SetHint();
status = BSP_TS_Init(BSP_LCD_GetXSize(), BSP_LCD_GetYSize());
if (status != TS_OK)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize()- 95, (uint8_t *)"ERROR", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize()- 80, (uint8_t *)"Touchscreen cannot be initialized", CENTER_MODE);
}
while (1)
{
if (status == TS_OK)
{
aLogX[0] = 15;
aLogY[0] = 15;
aLogX[1] = BSP_LCD_GetXSize() - 15;
aLogY[1] = BSP_LCD_GetYSize() - 15;
for (i = 0; i < 2; i++)
{
GetPhysValues(aLogX[i], aLogY[i], &aPhysX[i], &aPhysY[i]);
}
A1 = (TUNE_FACTOR_X * ( aLogX[1] - aLogX[0]))/ ( aPhysX[1] - aPhysX[0]);
B1 = (TUNE_FACTOR_X * aLogX[0]) - A1 * aPhysX[0];
A2 = (TUNE_FACTOR_Y * ( aLogY[1] - aLogY[0]))/ ( aPhysY[1] - aPhysY[0]);
B2 = (TUNE_FACTOR_Y * aLogY[0]) - A2 * aPhysY[0];
if (B2 > 0)
B2 = 0;
Calibration_Done = 1;
return;
}
HAL_Delay(5);
}
}
/**
* @brief Performs the TS calibration
* @param None
* @retval Status (TS_OK = 0/ TS_ERROR = 1 / TS_TIMEOUT = 1 / TS_DEVICE_NOT_FOUND = 3)
*/
uint8_t Touchscreen_Calibration(void)
{
uint8_t ts_status = TS_OK;
uint8_t i;
uint16_t ts_SizeX;
uint16_t ts_SizeY;
ts_SizeX = BSP_LCD_GetXSize();
ts_SizeY = BSP_LCD_GetYSize();
TouchscreenCalibration_SetHint();
/* Start touchscreen internal calibration and configuration + start */
ts_status = BSP_TS_Init(ts_SizeX, ts_SizeY);
if (ts_status != TS_OK)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)"ERROR", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 80, (uint8_t *)"Touchscreen cannot be calibrated", CENTER_MODE);
if(ts_status == TS_ERROR)
{
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"Touchscreen undefined error", CENTER_MODE);
}
else if(ts_status == TS_TIMEOUT)
{
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"Touchscreen Timeout", CENTER_MODE);
}
else
{
/* TS_DEVICE_NOT_FOUND */
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"Touchscreen Not Found", CENTER_MODE);
}
}
else
{
/* status == TS_OK */
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"FT6x06 internal calibration passed", CENTER_MODE);
/* Get touch points for SW calibration processing */
aLogX[0] = 40;
aLogY[0] = 40;
aLogX[1] = BSP_LCD_GetXSize() - 40;
aLogY[1] = BSP_LCD_GetYSize() - 40;
for (i = 0; i < 2; i++)
{
TouchScreen_Calibration_GetPhysValues(aLogX[i], aLogY[i], &aPhysX[i], &aPhysY[i]);
}
/* Compute calibration coefficients */
A1 = (1000 * ( aLogX[1] - aLogX[0])) / ( aPhysX[1] - aPhysX[0]);
B1 = (1000 * aLogX[0]) - A1 * aPhysX[0];
A2 = (1000 * ( aLogY[1] - aLogY[0])) / ( aPhysY[1] - aPhysY[0]);
B2 = (1000 * aLogY[0]) - A2 * aPhysY[0];
ts_calibration_done = 1;
}
return (ts_status);
}
