Diff: main.cpp

Revision:

0:92661f51fe68

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 27 07:19:10 2011 +0000
@@ -0,0 +1,160 @@
+// Bouncing Betty Halloween Effect
+// By: Michael Fischler
+// Residence Hall Association 2011-2012
+
+#include "mbed.h"                                   // Built for Mbed NXP LPC1768 Microprocessor 
+#include "PowerControl/PowerControl.h"              // for power mgmt
+#include "PowerControl/EthernetPowerControl.h"      // for power mgmt
+#include "wave_player.h"                            // for speakers
+#define USR_POWERDOWN    (0x104)
+int semihost_powerdown() {
+    uint32_t arg;
+    return __semihost(USR_POWERDOWN, &arg);
+}
+
+DigitalOut latch1(p15);  // Latch on RGB LED 1
+DigitalOut enable1(p16); // Enable on RGB LED 1
+SPI spi1(p11, p12, p13); // SPI for RGB LED 1
+
+DigitalOut latch2(p8);  // Latch on RGB LED 2
+DigitalOut enable2(p9); // Enable on RGB LED 2
+SPI spi2(p5, p6, p7);   // SPI for RGB LED 2
+
+AnalogOut DACout(p18);
+wave_player waver(&DACout);
+
+AnalogIn sonar(p20);        // Sonar Input
+DigitalIn pushbutton(p24);  // Pushbutton Input
+
+DigitalOut wdtLED(LED4);//WatchDog Indicator
+
+LocalFileSystem local("local");
+
+float distance;         // distance for sonar analog input
+float j = 0;            // Alternate Variable for Blue/Green
+bool j_increase = 1;    // Direction of Blue/Green Alternating
+
+class Watchdog {
+public:
+// Load timeout value in watchdog timer and enable
+    void kick(float s) {
+        LPC_WDT->WDCLKSEL = 0x1;                // Set CLK src to PCLK
+        uint32_t clk = SystemCoreClock / 16;    // WD has a fixed /4 prescaler, PCLK default is /4
+        LPC_WDT->WDTC = s * (float)clk;
+        LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
+        kick();
+    }
+// "kick" or "feed" the dog - reset the watchdog timer
+// by writing this required bit pattern
+    void kick() {
+        LPC_WDT->WDFEED = 0xAA;
+        LPC_WDT->WDFEED = 0x55;
+    }
+};
+
+Watchdog wdt;
+
+void RGB_LED(int red1, int green1, int blue1, int red2, int green2, int blue2) {    //Use SPI hardware to write color values to LED driver chip
+    unsigned int low_color1=0;
+    unsigned int high_color1=0;
+    unsigned int low_color2=0;
+    unsigned int high_color2=0;
+    high_color1=(blue1<<4)|((red1&0x3C0)>>6);
+    low_color1=(((red1&0x3F)<<10)|(green1));
+    high_color2=(blue2<<4)|((red2&0x3C0)>>6);
+    low_color2=(((red2&0x3F)<<10)|(green2));
+    spi1.write(high_color1);
+    spi1.write(low_color1);
+    spi2.write(high_color2);
+    spi2.write(low_color2);
+    latch1=1;
+    latch2=1;
+    wait(0.1);
+    latch1=0;
+    latch2=0;
+}
+
+void RGB_LED1(int red1, int green1, int blue1) {    //Use SPI hardware to write color values to LED driver chip
+    unsigned int low_color1=0;
+    unsigned int high_color1=0;
+    high_color1=(blue1<<4)|((red1&0x3C0)>>6);
+    low_color1=(((red1&0x3F)<<10)|(green1));
+    spi1.write(high_color1);
+    spi1.write(low_color1);
+    latch1=1;
+    wait(0.1);
+    latch1=0;
+}
+
+void RGB_LED2(int red2, int green2, int blue2) {    //Use SPI hardware to write color values to LED driver chip
+    unsigned int low_color2=0;
+    unsigned int high_color2=0;
+    high_color2=(blue2<<4)|((red2&0x3C0)>>6);
+    low_color2=(((red2&0x3F)<<10)|(green2));
+    spi2.write(high_color2);
+    spi2.write(low_color2);
+    latch2=1;
+    wait(0.1);
+    latch2=0;
+}
+
+int main() {
+
+    int result = 0;
+    if ((LPC_WDT->WDMOD >> 2) & 1)
+        wdtLED = 1;
+    else wdtLED = 0;
+
+    // 30 second timeout on watchdog timer hardware
+    wdt.kick(10.0);
+
+    //Power Management
+    PHY_PowerDown();                      // Power Down Ethernet
+    result = semihost_powerdown();        // Power Down USB Interface Chip (blue status LED)
+
+
+
+    pushbutton.mode(PullUp);
+    spi1.format(16,0);
+    spi1.frequency(500000);
+    spi2.format(16,0);
+    spi2.frequency(500000);
+    enable1=0;
+    latch1=0;
+    enable2=0;
+    latch2=0;
+    wait(2);
+
+    RGB_LED(50,50,50,50,50,50);
+
+    wait(5);
+
+    while (1) {
+        //Analog Input
+        distance = 11.261/sonar; //0.4 (80cm) to 0.98 (6cm)
+
+        if ((distance < 40)||(pushbutton == 0)) {
+            FILE *wave_file;                               // create pointer
+            wave_file = fopen("/local/scream.wav","r");    // Open wave file
+            RGB_LED(50,0,0,50,0,0);                        // LEDS to Red
+            waver.play(wave_file);                         // Play Sound
+            fclose(wave_file);                             // Close File
+        } else {
+            if (j_increase) {
+                j = j + 2;
+                if (j > 48) {
+                    j_increase = 0;
+                }
+            } else {
+                j=j - 2;
+                if (j < 2) {
+                    j_increase = 1;
+                }
+            }
+            RGB_LED(0,50-j,j,0,50-j,j);                    // Fade between blue and green
+
+        }
+        wdt.kick();
+    }
+
+}