Diff: main.cpp

Revision:

1:ba5061c882ea

Parent:

0:38b190020352

--- a/main.cpp	Sat Apr 26 12:46:40 2014 +0000
+++ b/main.cpp	Mon Apr 28 01:56:27 2014 +0000
@@ -24,10 +24,12 @@
 #include "USBSerial.h"
 
 #define PIN_PWR         P1_2    //power up gprs module
+#define PIN_PWR_KEY     P1_7
 #define PIN_TX          P1_27   //Serial tx pin
 #define PIN_RX          P1_26   //Serial rx pin
 
 DigitalOut power(PIN_PWR);
+DigitalOut powerKey(PIN_PWR_KEY);
 Serial gprs(PIN_TX, PIN_RX);
 USBSerial pc;
 
@@ -44,17 +46,38 @@
     gprs.format(bits, parityTable[parity], stop);
 }
 
+/* power pin: low enable
+     ___
+        |___
+
+   powerKey pin: you can also power up by long press the powerKey.
+
+        ___
+    ___|   |___
+
+*/
 void gprsPowerUp(void)
 {
+    power = 1;
+    wait(2);
     power = 0;
+    wait(2);
+
+    powerKey = 0;
+    wait(1);
+    powerKey = 1;
+    wait(2);
+    powerKey = 0;
+    wait(3);
+
 }
 
 int main()
 {
+    pc.attach(settingsChanged);
+    pc.printf("wait for GPRS power up...");
     gprsPowerUp();
-    wait(2);
-
-    pc.attach(settingsChanged);
+    pc.printf("gprs Power up success\n");
 
     while (1) {
         while (gprs.readable()) {