implemented functions to get x and y coordinates and a test function

common/app/app.c

@@ -19,7 +19,7 @@ void app_init() {
 void app_process() {
 	
 	system_process(); //Let the system handle it's pending events
-	gui_screen_update(); //update the currently active screen
+	//gui_screen_update(); //update the currently active screen
 }
 
 

discovery/src/ll_system.c

@@ -49,8 +49,11 @@ bool ll_system_init(void)
   return true;
 }
 
+void touch_test(void);
+
 void ll_system_process() {
 	USBH_Process(&USB_OTG_Core, &USB_Host);
+    touch_test();
 }
 
 void ll_system_delay(uint32_t msec) {

discovery/src/ll_touch.c

@@ -2,8 +2,78 @@
 #include<stm32f4xx_spi.h>
 #include<stm32f4xx_rcc.h>
 
+#include<tft.h>
+#include<stdio.h>
+#include<stdlib.h>
+
+/* Defines ----------------------------------------------------------  */
 #define CLEAR_CS        GPIO_ResetBits(GPIOB,GPIO_Pin_9)
 #define SET_CS          GPIO_SetBits(GPIOB,GPIO_Pin_9)
+#define REQ_X_COORD     0x90    // Request x coordinate
+#define REQ_Y_COORD     0xD0    // Request y coordinate
+#define REQ_1_DATAB     0x00    // Request one databyte
+
+
+/* Prototypes -------------------------------------------------------- */
+bool ll_touch_init();
+static uint8_t  touch_send(uint8_t dat);
+static uint16_t touch_get_y_coord();
+static uint16_t touch_get_y_coord();
+void touch_test();
+
+/*
+void touch_test()
+{
+    tft_clear(BLACK);
+    //test
+    CLEAR_CS;
+    touch_send(0xD0);
+
+    uint16_t buf = ((uint16_t) touch_send(0x00))<<5;
+    buf|= touch_send(0x00) >> 3;
+
+    int test = 3;
+
+    SET_CS;
+ 
+    char b[10];
+
+    itoa(buf, b, 10);
+    
+    tft_print_line(10,10,WHITE,TRANSPARENT,0,(const char*)b);
+    tft_print_formatted(10,50,WHITE,TRANSPARENT,0,"XCoord %d", test);
+}
+*/
+
+/* Functions --------------------------------------------------------- */
+static uint16_t touch_get_x_coord()
+{
+    uint16_t buf_x = 0;
+    CLEAR_CS;                                           // clear chipselect
+    touch_send(REQ_X_COORD);                            // request x coordinate
+    
+    buf_x = ((uint16_t) touch_send(REQ_1_DATAB)) << 5;    
+    buf_x |= touch_send(REQ_1_DATAB) >> 3;
+
+    SET_CS;                                             // set chipselect
+
+    return buf_x;
+}
+
+static uint16_t touch_get_y_coord()
+{
+    uint16_t buf_y = 0;
+
+    CLEAR_CS;                                           // clear chipselect
+    touch_send(REQ_Y_COORD);                            // request y coordinate
+    
+    buf_y  = ((uint16_t) touch_send(REQ_1_DATAB)) << 5;
+    buf_y |= touch_send(REQ_1_DATAB) >> 3;
+
+    SET_CS;                                             // set chipselect
+
+    return buf_y;
+}
 
 static uint8_t touch_send(uint8_t dat)
 {
@@ -13,6 +83,24 @@ static uint8_t touch_send(uint8_t dat)
   return  SPI_I2S_ReceiveData(SPI2);                                    
 }
 
+void touch_test()
+{
+    uint16_t x = 0, y = 0;
+    char xs[10];
+    char ys[10];
+
+    tft_clear(BLACK);
+    
+    x = touch_get_x_coord();
+    y = touch_get_y_coord();
+
+    itoa(x, xs, 10);
+    itoa(y, ys, 10);
+
+    tft_print_line(10, 10, WHITE, TRANSPARENT, 0, (const char*)xs);
+    tft_print_line(10, 30, WHITE, TRANSPARENT, 0, (const char*)ys);
+}
+
 bool ll_touch_init() 
 {
     //We have a ADS7843 Touch controller
@@ -73,22 +161,6 @@ bool ll_touch_init()
     // enable spi   
     SPI_Cmd(SPI2, ENABLE);
 
-
-    /*
-     * TEST ahead ...
-     */
-
-    CLEAR_CS;
-    touch_send(0x90);
-    
-    for(long i=0; i<1000; i++);
-
-    uint16_t buf = ((uint16_t) touch_send(0x00))<<5;
-    buf|= touch_send(0x00) >> 3;
-
-    SET_CS;
-
-
     return true;
 }