Diff: main.cpp

Revision:

0:7bea87fe7ce1

Child:

1:3d4042d58038

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 14 19:35:21 2020 +0000
@@ -0,0 +1,286 @@
+#include "mbed.h"
+#include "BMP180.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+
+I2C bmp(D4, D5);
+BMP180 bmp180(&bmp);
+Serial xbee(PA_9, PA_10);
+I2C i2c(D4, D5); // sda, scl
+#include "SSD1306.h"
+DigitalOut led(LED1);
+DigitalIn button(A1);
+DigitalOut led_button(A2);
+const int AQCM0802_addr = 0x7C;
+
+unsigned char mode;
+unsigned char contrast = 0; // 0-63
+unsigned char contrastFlag = false;
+int CGcounter;
+int FADEcounter;
+
+void lcd_cmd(char x)
+{
+    char data[2];
+    data[0] = 0x00; // CO = 0,RS = 0
+    data[1] = x;
+    i2c.write(AQCM0802_addr, data, 2);
+}
+
+void lcd_contdata(char x)
+{
+    char data[2];
+    data[0] = 0xC0; //0b11000000 CO = 1, RS = 1
+    data[1] = x;
+    i2c.write(AQCM0802_addr, data, 2);
+}
+
+void lcd_lastdata(char x)
+{
+    char data[2];
+    data[0] = 0x40; //0b11000000 CO = 0, RS = 1
+    data[1] = x;
+    i2c.write(AQCM0802_addr, data, 2);
+}
+
+void lcd_printStr(const char *s)
+{
+    while(*s) {
+        if(*(s + 1)) {
+            lcd_contdata(*s);
+        } else {
+            lcd_lastdata(*s);
+        }
+        s++;
+    }
+}
+
+void lcd_printHex(unsigned char num)
+{
+    lcd_contdata(num);
+}
+
+void lcd_init()
+{
+    wait(0.04);
+    // LCD initialize
+    lcd_cmd(0x38); // function set
+    lcd_cmd(0x39); // function set
+    lcd_cmd(0x04); // EntryModeSet
+    lcd_cmd(0x14); // interval osc
+    lcd_cmd(0x70 | (contrast & 0xF)); // contrast Low
+    lcd_cmd(0x5C | ((contrast >> 4) & 0x3)); // contast High/icon/power
+    lcd_cmd(0x6C); // follower control
+    wait(0.2);
+    lcd_cmd(0x38); // function set
+    lcd_cmd(0x0C); // Display On
+    lcd_cmd(0x01); // Clear Display
+    wait(0.2); // need additional wait to Clear Display
+}
+
+void lcd_setCursor(unsigned char x,unsigned char y)
+{
+    lcd_cmd(0x80 | (y * 0x40 + x));
+}
+
+void setContrast(unsigned char c)
+{
+    lcd_cmd(0x39);
+    lcd_cmd(0x70 | (c & 0x0f)); // contrast Low
+    lcd_cmd(0x5C | ((c >> 4) & 0x03)); // contast High/icon/power
+    lcd_cmd(0x38);
+}
+
+float get_P()
+{
+    float sum = 0.0f;
+    for(int i=0;i<10;i++){
+        bmp180.startPressure(BMP180::ULTRA_LOW_POWER);
+        wait_ms(10);    // Wait for conversion to complete
+        int pressure;
+        if(bmp180.getPressure(&pressure) != 0) {
+            printf("Error getting pressure\n");
+        }
+        sum += pressure;
+    }
+    return sum/1000.0f;
+}
+
+float get_T()
+{
+    float sum = 0.0f;
+    for(int i=0;i<10;i++){
+        bmp180.startTemperature();
+        wait_ms(5);     // Wait for conversion to complete
+        float temp;
+        if(bmp180.getTemperature(&temp) != 0) {
+            printf("Error getting temperature\n");
+        }
+        sum += temp;
+    }
+    return sum/10.0f;
+}
+
+
+int main()
+{
+    ssd1306_init();
+    ssd1306_init_meter_display();
+    button.mode(PullUp);
+    while(1) {
+        if (bmp180.init() != 0) {
+            printf("Error communicating with BMP180\n");
+        } else {
+            printf("Initialized BMP180\n");
+            break;
+        }
+        wait(1);
+    }
+
+    char buf[64] = {};
+    int buf_count = 0;
+    float pressure, temp, ground_P, ground_T, height;
+    bool init = false;
+    char str_lcd[15];
+    char strtmp[15];
+    int n;
+    lcd_init();
+    lcd_setCursor(0,0);
+    lcd_printStr("Hello");
+    lcd_setCursor(3,1);
+    lcd_printStr("SSSRC");
+    contrast = 35;
+    setContrast(contrast);
+    while(1) {
+        int timer = 0;
+        int bb = button;
+        while(!bb){
+            led_button = 1;
+            if(timer == 0){
+                lcd_setCursor(0,0);
+                lcd_printStr("55555555");
+                lcd_setCursor(0,1);
+                lcd_printStr("55555555");
+                contrast = 35;
+            }else if(timer == 10){
+                lcd_setCursor(0,0);
+                lcd_printStr("44444444");
+                lcd_setCursor(0,1);
+                lcd_printStr("44444444");
+                contrast = 35;
+            }else if(timer == 20){
+                lcd_setCursor(0,0);
+                lcd_printStr("33333333");
+                lcd_setCursor(0,1);
+                lcd_printStr("33333333");
+                contrast = 35;
+            }else if(timer == 30){
+                lcd_setCursor(0,0);
+                lcd_printStr("22222222");
+                lcd_setCursor(0,1);
+                lcd_printStr("22222222");
+                contrast = 35;
+            }else if(timer == 40){
+                lcd_setCursor(0,0);
+                lcd_printStr("11111111");
+                lcd_setCursor(0,1);
+                lcd_printStr("11111111");
+                contrast = 35;
+            }else if(timer>=50){
+                xbee.printf("O");
+                lcd_setCursor(0,0);
+                lcd_printStr("CanSat  ");
+                lcd_setCursor(0,1);
+                lcd_printStr(" Deploy!");
+                contrast = 35;
+            }
+            wait(0.1);
+            timer++;
+            bb = button;
+        }
+        led_button = 0;
+        //buf[0] = '0';
+        while(xbee.readable()==0) {
+            xbee.printf("G");
+        }
+        while(1) {
+            int c = xbee.getc();
+            //printf("%c",c);
+            if(buf_count == 0 && c != 'P') {
+                continue;
+            }
+            buf[buf_count] = c;
+            buf_count++;
+            if(c == '\n') {
+                buf[buf_count] = '\0';
+                printf("buf:%s\r\n",buf);
+                sscanf(buf,"PP%fT%f\n", &pressure, &temp);
+                pressure += 1.77f;
+                buf_count = 0;
+                bool push = false;
+                for(int i=0;i<18;i++){
+                    bb = button;
+                    if(!bb){
+                        led_button = 1;
+                        push = true;
+                        break;
+                    }
+                    wait(0.1);
+                }
+                if(push) break;
+                led = 1;
+                for(int i=0;i<2;i++){
+                    bb = button;
+                    if(!bb){
+                        led_button = 1;
+                        push = true;
+                        break;
+                    }
+                    wait(0.1);
+                }
+                if(push) break;
+                led = 0;
+                ground_P = get_P();
+                ground_T = get_T();
+                //height = ( pow(ground_P/pressure, 1/5.257f)-1 )*(temp+273.15f)/0.0065f;
+                height = 290*((temp+ground_T)/2+273.15f)/9.80665f*log(ground_P/pressure);
+                if(init) {
+                printf("P0=%f P=%f T=%f     B-G=%f\r\n--------------------\r\n",ground_P,pressure,temp,pressure-ground_P);
+                    if(height<-100 or height>1000) continue;
+                    if(pressure-ground_P>0) height=0.0;
+                    sprintf(str_lcd,"%.1fhPa",ground_P-pressure);
+                    n=8-strlen(str_lcd);
+                    for(int i=0; i<n; i++) {
+                        sprintf(strtmp," %s",str_lcd);
+                        sprintf(str_lcd,"%s",strtmp);
+                    }
+                    lcd_setCursor(0,0);
+                    lcd_printStr(str_lcd);
+                    printf("%s\r\n",str_lcd);
+
+                    sprintf(str_lcd,"%.1f""\xf2""C",ground_T);
+                    n=8-strlen(str_lcd);
+                    for(int i=0; i<n; i++) {
+                        sprintf(strtmp," %s",str_lcd);
+                        sprintf(str_lcd,"%s",strtmp);
+                    }
+                    
+                    lcd_setCursor(0,1);
+                    lcd_printStr(str_lcd);
+                    contrast = 35;
+                    setContrast(contrast);
+                    printf("%s\r\n\r\n",str_lcd);
+                    printf("height=%f m\r\n",height);
+                    ssd1306_draw_meter( (int)height );
+                    
+                }
+                init = true;
+                printf("P0=%f P=%f T=%f     B-G=%f\r\n--------------------\r\n",ground_P,pressure,temp,pressure-ground_P);
+            }
+            break;
+        }
+    }
+}