Revision 2:cb6377d909e0, committed 2015-06-23

Comitter:

julioefajardo

Date:

Tue Jun 23 02:53:31 2015 +0000

Parent:

1:b9ea91c4c533

Commit message:

Joystick USB with Low Power Mode

Changed in this revision

--- a/main.cpp	Mon Jun 22 20:17:43 2015 +0000
+++ b/main.cpp	Tue Jun 23 02:53:31 2015 +0000
@@ -1,23 +1,80 @@
 #include "mbed.h"
 #include "USBMouse.h"
+#include "FXOS8700Q.h"
 
 DigitalIn RightClick(PTC6);
 DigitalIn LeftClick(PTA4);
-DigitalIn Click(PTC10);
+DigitalIn Click(PTC11);
 DigitalOut BlueLed(LED3);
-
+DigitalOut GreenLed(LED2);
+Ticker flipper;
 USBMouse mouse;
 
 AnalogIn AnIn0(A0);
 AnalogIn AnIn1(A1);
 
+FXOS8700Q_acc acc( PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1); // Proper Ports and I2C Address for K64F Freedom board
+
+Serial pc(USBTX, USBRX);
+
+void flip() {
+    GreenLed = !GreenLed;
+}
+
+void LLW_IRQHandler(void){
+    if (LLWU_F2 & LLWU_F2_WUF11_MASK) {
+       LLWU_F2 |= LLWU_F2_WUF11_MASK;   // write one to clear the flag
+    }
+}
+
+void LLW_Init(void){
+    LLWU_F2 |= LLWU_F2_WUF11_MASK;
+    LLWU_PE3 = 0x80;
+    LLWU_ME = 0x01;
+    LLWU_RST = 0x01;
+}
+
+void Enter_VLLS0(void){
+    volatile unsigned int dummyread;
+    int i;
+    SMC_PMPROT = SMC_PMPROT_AVLLS_MASK;
+    if ((SMC_PMSTAT & SMC_PMSTAT_PMSTAT_MASK)== 4){
+        SMC_PMCTRL &= ~SMC_PMCTRL_RUNM_MASK;   // go back to RUN mode temporarily
+         for (i=0;i<0xff;i++)
+        {
+            if ((SMC_PMSTAT & SMC_PMSTAT_PMSTAT_MASK)== 1)
+                break;
+        }
+    }
+    /* Set the STOPM field to 0b100 for VLLS0 mode */
+    SMC_PMCTRL &= ~SMC_PMCTRL_STOPM_MASK; 
+    SMC_PMCTRL |=  SMC_PMCTRL_STOPM(0x4); 
+    /* set VLLSM = 00 * and PORPO = 1 */
+    SMC_VLLSCTRL &= ~SMC_VLLSCTRL_VLLSM_MASK;
+    SMC_VLLSCTRL =  SMC_VLLSCTRL_VLLSM(0) | SMC_VLLSCTRL_PORPO_MASK;  
+    /*wait for write to complete to SMC before stopping core */  
+    dummyread = SMC_VLLSCTRL;
+    dummyread++;
+    /* Now execute the stop instruction to go into VLLS0 */
+    /* Set the SLEEPDEEP bit to enable deep sleep mode (STOP) */
+    //SCB->SCR |= SCB_SCR_SLEEPDEEP_MASK;
+    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
+    __wfi();
+}
+
 int main() 
 {
+    float faX, faY, faZ;
     float posx, posy; 
-    float pposx, pposy;
+    float pastx, pasty;
     int16_t x = 0;
     int16_t y = 0;
-    Click.mode(PullUp);
+    //Initializations
+    acc.enable();
+    LLW_Init();
+    //Interrupts
+    flipper.attach(&flip, 0.1);
+    NVIC_EnableIRQ(LLW_IRQn);
     
     while (1) 
     {
@@ -29,15 +86,19 @@
         
         BlueLed = Click;
         
+        acc.getX(&faX);
+        if(faX>0.5f) Enter_VLLS0();
+        //pc.printf("X=%1.4f       \r",faX);
+        
         posx=AnIn0.read();
         posy=AnIn1.read();
-        x = -800*(posx-pposx);
-        y = 800*(posy-pposy);
+        x = -800*(posx-pastx);
+        y = 800*(posy-pasty);
 
         mouse.move(x, y);
         
-        pposx = posx;
-        pposy = posy;
+        pastx = posx;
+        pasty = posy;
               
         wait(0.01);
     }