Yongqiang Wang
Weather Band Receiver
Diff: main.cpp
- Revision:
- 0:e8c6523f2c36
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Apr 30 03:55:17 2013 +0000
@@ -0,0 +1,204 @@
+// - Weather Warning Alert System Receiver
+
+#include "mbed.h"
+#include "NokiaLCD.h"
+
+Serial Xbee1(p13, p14); // TX, RX
+I2C radio(p28, p27); // sda, scl
+NokiaLCD lcd(p5, p7, p8, p9, NokiaLCD::LCD6610); // mosi, sclk, cs, rst, type LCD6610, PCF8833
+DigitalOut Weather_rst(p29); // Weather band radio reset
+DigitalOut rst1(p26); // Xbee reset
+DigitalOut beep(p21); // Piezo speaker
+DigitalOut MyRx(LED1); // Data receive
+DigitalIn cancel(p20); // Acknowledge alert
+
+//====================================== Global Variables =============================================
+const int write_addr=0x22;
+int wb_pwr_up[3]={0x01, 0x13, 0x05}; // Weather band power-up command
+int wb_station[4]={0x50, 0x00, 0xFD, 0xFC}; // Set weather band station to 162.55MHz
+int reg_station=0xFDFC, i=0, Response, ack=0, pwr_down=0x11, tune=0x31;
+int count,j;
+int* p_pwr_down = &pwr_down;
+int* p_tune = &tune;
+float f = 162.5500;
+float wndspd=0, wnddir=0,rngg=0,temp=0,humdty=0,press=0,sunint=0;
+char c;
+char t[100], // Debug String ==> S1.2 34.5 6.7 89.0 12.8 34.5 67890.1@
+ws[10], wd[10], rg[10], tp[10], hd[10], ps[10], sn[10];
+bool alert=0;
+
+//=============================== Support Functions for WB Radio ======================================
+void SendCommand(int* array, int length) { /* Send Command to Si4707 */
+ radio.start();
+ ack=radio.write(write_addr);
+ for(i=0; i<length; i++) ack=radio.write(array[i]);
+ Response=radio.read(ack);
+ radio.stop();
+ wait(.2);
+}
+
+void Reset(void) { /* Reset weather band radio */
+ Weather_rst=0;
+ wait(.2);
+ Weather_rst=1;
+ wait(.2);
+}
+
+void WB_Restart(void) { /* Reinitialize Weather band receiver */
+ SendCommand(p_tune, 1); // Disable carrier
+ wait(.2);
+ SendCommand(p_pwr_down, 1); // Power down sequence
+ wait(.2);
+ Reset();
+ SendCommand(wb_pwr_up, 3); // Launch Weather band radio
+ wait(.5);
+ SendCommand(wb_station, 4); // Play current weather band station
+}
+
+// =========================================== Main Program ===========================================
+int main() {
+ cancel.mode(PullUp);
+ beep=0;
+ MyRx=0;
+ rst1 = 0;
+ wait_ms(200);
+ rst1 = 1; // Reset Xbee
+ radio.frequency(100000); // I^2C frequency setting 100kHz
+ lcd.cls(); // Clear LCD
+ lcd.background(0x0000FF); // Set LCD background to blue
+ while(1) {
+ if(alert) {
+ beep=1;
+ wait(1);
+ beep=0;
+ wait(1);
+ beep=1;
+ wait(1);
+ beep=0;
+ wait(1);
+ beep=1;
+ wait(1);
+ beep=0;
+ wait(1);
+ beep=1;
+ wait(1);
+ beep=0;
+ wait(1);
+ Reset();
+ WB_Restart(); // Start WB radio
+ while(cancel); // Wait for user response
+ alert=0;
+ lcd.cls();
+ lcd.background(0x0000FF);
+ SendCommand(p_tune, 1);
+ wait(.2);
+ SendCommand(p_pwr_down, 1); // Stop WB radio
+ wait(.2);
+ }
+ if(Xbee1.readable()) { // Data available to receive
+ c=Xbee1.getc();
+ if(c=='A') alert=1; // Send 'A' on serial port to sound speaker
+ if(c=='S'){ // Beginning of data array
+ int i=0;
+ while((c=Xbee1.getc())!='@') // Loop until terminator reached
+ t[i++]=c;
+ t[i]='\0';
+ count=0;
+ j=0;
+ MyRx=1;
+ wait_ms(200);
+ MyRx=0;
+ for(int i=0; i<sizeof(t); i++) { // Parse data array
+ if(t[i]=='\0') break;
+ if(t[i]==' ') continue;
+ if((t[i]!=' ')&&(t[i-1]==' ')) {
+ j=0;
+ count++;
+ }
+ switch(count) { // Space count of data array
+ case 1: // Build wind speed subarray
+ ws[j++]=t[i];
+ break;
+ case 2: // Build wind direction subarray
+ wd[j++]=t[i];
+ break;
+ case 3: // Build rain gauge subarray
+ rg[j++]=t[i];
+ break;
+ case 4: // Build temperature subarray
+ tp[j++]=t[i];
+ break;
+ case 5: // Build humidity subarray
+ hd[j++]=t[i];
+ break;
+ case 6: // Build pressure subarray
+ ps[j++]=t[i];
+ break;
+ case 7: // Build sunlight intensity subarray
+ sn[j++]=t[i];
+ break;
+ default:;
+ }
+ }
+ wndspd=atof(ws);
+ wnddir=atof(wd);
+ rngg=atof(rg);
+ temp=atof(tp);
+ humdty=atof(hd);
+ press=atof(ps);
+ sunint=atof(sn);
+ lcd.cls();
+ //------------------------- Define alerts -------------------------
+ if((temp>40)||(temp<0)) {
+ alert=1;
+ lcd.locate(0,10);
+ lcd.printf("Temperature!!!");
+ lcd.background(0xFF0000);
+ }
+ else if (wndspd>4){
+ alert=1;
+ lcd.locate(0,10);
+ lcd.printf("Wind!!!");
+ lcd.background(0xFF0000);
+ }
+ else if (humdty>95){
+ alert=1;
+ lcd.locate(0,10);
+ lcd.printf("Humidity!!!");
+ lcd.background(0xFF0000);
+ }
+ else if (sunint<10){
+ alert=1;
+ lcd.locate(0,10);
+ lcd.printf("Cloudy!!!");
+ lcd.background(0xFF0000);
+ }
+ else if ((3*rngg)>25){
+ alert=1;
+ lcd.locate(0,10);
+ lcd.printf("Flood!!!");
+ lcd.background(0xFF0000);
+ }
+ else lcd.background(0x0000FF);
+ lcd.locate(0,1);
+ lcd.printf("WndSPd: %3.1fm/s",wndspd);
+ lcd.locate(0,2);
+ lcd.printf("WndDir: %3.1fdg",wnddir);
+ lcd.locate(0,3);
+ lcd.printf("Rain: %3.1fmm/hr",3*rngg);
+ lcd.locate(0,4);
+ lcd.printf("TEMP: %3.1fC",temp);
+ lcd.locate(0,5);
+ lcd.printf("Humidity: %3.1f%%",humdty);
+ lcd.locate(0,6);
+ lcd.printf("Press: %5.1fPa",press);
+ lcd.locate(0,7);
+ lcd.printf("Sun: %3.1f%%",sunint);
+ wait(1);
+ }
+ MyRx=1;
+ wait_ms(200);
+ MyRx=0;
+ }
+ }
+}
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