stm32f429 SRAM + ext SRAM + TFT 16bit with DMA

//-------------------------------------------------------------------------------
bool IsTouch(void)
{
if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_8) == RESET)
return true;
return false;
}

//-------------------------------------------------------------------------------
bool Get_Touch_xy(__IO uint16_t *x_kor, __IO uint16_t *y_kor)
{
__IO uint16_t touch_x = 0;
__IO uint16_t touch_y = 0;
uint16_t touch_X[10]={0}, touch_Y[10]={0}, touch_avg;
uint8_t i, flag;

flag = IsTouch();
//press = IsTouch_XY();
if(flag) //Есть касание //There is a touch
{
for(i=0;i<10;i++) //Считываем десять измерений x и y в точке касания //Read ten dimensions x and y at the point of tangency
{
touch_X[i] = Get_Touch(chx);
touch_Y[i] = Get_Touch(chy);
}

Sort(touch_X); //Сортируем измерения по нарастающей //We sort the measurements by increasing
Sort(touch_Y);

touch_avg=0; //Расчитываем среднее арифметическое измерений отбросив два наименьших и два наибольших
for(i=2;i<6;i++) //We calculate the average of the arithmetic measurements by discarding the two smallest and two largest
touch_avg+=touch_X[i];
touch_x=touch_avg/4;

touch_avg=0;
for(i=2;i<6;i++)
touch_avg+=touch_Y[i];
touch_y=touch_avg/4;

touch_x -= Xmin;
touch_x = 240 - touch_x/((Xmax-Xmin)/240);
touch_y -= Ymin;
touch_y = 320 - touch_y/((Ymax-Ymin)/320);

if(touch_x > 240)
touch_x = 240;
if(touch_y > 320)
touch_y = 320;

init_XPT2046();

// *x_kor = touch_x;
// *y_kor = touch_y;
*y_kor = touch_x;
*x_kor = touch_y;
}
return flag;
}

//------------------------------------------------------------------------------
void touchGetCoef(int16_t *_ax, int16_t *_bx, int16_t *_ay, int16_t *_by)
{
I2cReadBuffer(hi2c1, EEPROM_HW_ADDRESS, 0, 8);
*_ax = I2CBuff[0]<<8; //hight byte
*_ax |= I2CBuff[1]; //low byte
*_bx = I2CBuff[2]<<8;
*_bx |= I2CBuff[3];
*_ay = I2CBuff[4]<<8;
*_ay |= I2CBuff[5];
*_by = I2CBuff[6]<<8;
*_by |= I2CBuff[7];
}

//------------------------------------------------------------------------------
void TouchColibrate(void)
{
uint16_t x, y;

static Text_TypeDef text0;
static Text_TypeDef text1;

// if(!ReadStatusCalibrate())
// return;
init_text(&text0, 50, 100, BLACK, CYAN, 2, 2, MANUAL);
init_text(&text1, 50, 120, BLACK, CYAN, 2, 2, MANUAL);
sprintf(text0.text1, "%s", "Калибровка");

ram_bg_to_screen(SCREEN_BASE_ADDR_1);
tft_text(&text0, &text0.textvar);
drawLine (10, 10+25, 10+50, 10+25, BLACK);
drawLine (10+25, 10, 10+25, 10+50, BLACK);
DrawCircle(35, 35, 4, BLACK);
SetCursor(50, 120);
sprintf(text1.text1, "%s", "Нажимайте ");
tft_text(&text1, &text1.textvar);
tft();

while (1)
{
// ждать нажатия
while (!IsTouch());
Get_Touch_xy (&x, &y, false);
if (x < 4090 && y < 4090)
{
xPos[0] = x;
yPos[0] = y;
break;
} // if
} // while
sprintf(text1.text1, "%s", "Отпускайте");
tft_text(&text1, &text1.textvar);
tft();

while (IsTouch());
ram_bg_to_screen(SCREEN_BASE_ADDR_1);
tft_text(&text0, &text0.textvar);
drawLine (LCD_PIXEL_WIDTH-10-50, 10+25, LCD_PIXEL_WIDTH-10-50+50, 10+25, BLACK);
drawLine (LCD_PIXEL_WIDTH-10-25, 10, LCD_PIXEL_WIDTH-10-25, 10+50, BLACK);
DrawCircle(285, 35, 4, BLACK);
sprintf(text1.text1, "%s", "Нажимайте ");
tft_text(&text1, &text1.textvar);
tft();
while (1)
{
// ждать нажатия
while (!IsTouch());
Get_Touch_xy (&x, &y, false);
if (x < 4090 && y < 4090)
{
xPos[1] = x;
yPos[1] = y;
break;
} // if
} // while
sprintf(text1.text1, "%s", "Отпускайте");
tft_text(&text1, &text1.textvar);
tft();

while (IsTouch());
ram_bg_to_screen(SCREEN_BASE_ADDR_1);
tft_text(&text0, &text0.textvar);
drawLine (10, LCD_PIXEL_HEIGHT-10-25, 10+50, LCD_PIXEL_HEIGHT-10-25, BLACK); // hor
drawLine (10+25, LCD_PIXEL_HEIGHT-10-50, 10+25, LCD_PIXEL_HEIGHT-10-50+50, BLACK); // vert
DrawCircle(35, 205, 4, BLACK);
sprintf(text1.text1, "%s", "Нажимайте ");
tft_text(&text1, &text1.textvar);
tft();
while (1)
{
// ждать нажатия
while (!IsTouch());
Get_Touch_xy (&x, &y, false);
if (x < 4090 && y < 4090)
{
xPos[2] = x;
yPos[2] = y;
break;
} // if
} // while
sprintf(text1.text1, "%s", "Отпускайте");
tft_text(&text1, &text1.textvar);
tft();

while (IsTouch());
ram_bg_to_screen(SCREEN_BASE_ADDR_1);
tft_text(&text0, &text0.textvar);
drawLine (LCD_PIXEL_WIDTH-10-50, LCD_PIXEL_HEIGHT-10-25, LCD_PIXEL_WIDTH-10-50+50, LCD_PIXEL_HEIGHT-10-25, BLACK); // hor
drawLine (LCD_PIXEL_WIDTH-10-25, LCD_PIXEL_HEIGHT-10-50, LCD_PIXEL_WIDTH-10-25, LCD_PIXEL_HEIGHT-10-50+50, BLACK); // vert
DrawCircle(285, 205, 4, BLACK);
sprintf(text1.text1, "%s", "Нажимайте ");
tft_text(&text1, &text1.textvar);
tft();
while (1)
{
// ждать нажатия
while (!IsTouch());
Get_Touch_xy (&x, &y, false);
if (x < 4090 && y < 4090)
{
xPos[3] = x;
yPos[3] = y;
break;
} // if
} // while
sprintf(text1.text1, "%s", "Отпускайте");
tft_text(&text1, &text1.textvar);
tft();

while (IsTouch());
sprintf(text1.text1, "%s", " ");
tft_text(&text1, &text1.textvar);
tft();

// Расчёт коэффициентов
if(xPos[0]>xPos[3])
{
swap(xPos[0],xPos[3]);
}
axc[0] = (xPos[3] - xPos[0])/(xCenter[3] - xCenter[0]);
bxc[0] = xCenter[0] - xPos[0]/axc[0];
if(yPos[0]>yPos[3])
{
swap(yPos[0],yPos[3]);
}
ayc[0] = (yPos[3] - yPos[0])/(yCenter[3] - yCenter[0]);
byc[0] = yCenter[0] - yPos[0]/ayc[0];

touchSetCoef (axc[0], bxc[0], ayc[0], byc[0], true);