Revision 82:a325ac3c1b73, committed 2019-12-27

Comitter:

batman52

Date:

Fri Dec 27 15:17:32 2019 +0000

Parent:

81:7a20aa99834e

Commit message:

now supports IRQ instead of polling

Changed in this revision

--- a/lib_sx9500.lib	Thu Dec 19 17:07:35 2019 +0000
+++ b/lib_sx9500.lib	Fri Dec 27 15:17:32 2019 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/batman52/code/lib_sx9500/#f88a77463a32
+https://os.mbed.com/users/batman52/code/lib_sx9500/#b0a2ba594005

--- a/main.cpp	Thu Dec 19 17:07:35 2019 +0000
+++ b/main.cpp	Fri Dec 27 15:17:32 2019 +0000
@@ -1,10 +1,27 @@
 #include "mbed.h"
 #include "sx9500.h"
 
+#define IRQ_EN 1
+
 I2C i2c0(I2C_SDA , I2C_SCL );    // I2C_SCL = PTC10,  I2C_SDA = PTC11,
 SX9500 touch(i2c0, PTA24, PTA9); // TOUCH_TXEN = PTA24, TOUCH_INT = PTA9
 DigitalOut touch_rst(PTA2,1);    // TOUCH_RST = PTA2
 
+bool read_en = true;
+
+#if(IRQ_EN)
+// InterruptIn SW1(PTE28);
+InterruptIn touch_int(PTA9);
+/* LEDS */
+DigitalOut led_red(LED_RED, 1);
+
+void touch_irq()
+{
+        read_en = true;
+        led_red = !led_red;
+}
+#endif // IRQ_EN
+
 void print_state(SX9500_TouchState_t ts)
 {
             if(ts.downPressed)            
@@ -19,24 +36,39 @@
                     printf("NONE\r\n"); 
 }
 
+void touch_service()
+{
+SX9500_TouchState_t ts;
+read_en = false;
+ts = touch.read_proximity_sensors();                 
+print_state(ts);
+// reset interrupt state
+touch.service();
+}
+
 // main() runs in its own thread in the OS
 int main() {    
-    SX9500_TouchState_t ts;
-  
-    wait(1);
-  
+      
+    wait(1);  
     touch.reset();        
     wait(0.3); // wait until the reset has finished
     touch.init();
     wait(0.3);
     touch.set_active(true);    
     wait(0.3);
-    
+
+#if(IRQ_EN)
+    touch_int.fall(&touch_irq);
+    // SW1.fall(&touch_irq);
+    read_en = false;
+#endif
+
     while (true) {      
-
+#if(!IRQ_EN)
+            read_en = true;
+#endif
             wait(0.3);
-            ts = touch.read_proximity_sensors();                 
-            print_state(ts);
-            
+            if(read_en)
+                touch_service();
     }
 }