Suga koubou
Barometer for EA LPC11U35 QuickStart Board see: https://mbed.org/users/okini3939/notebook/barometer/
Dependencies: BMP085 PCF2119 WDT mbed
Revision 0:ac9cb7d35d0c, committed 2014-07-11
- Comitter:
- okini3939
- Date:
- Fri Jul 11 00:56:46 2014 +0000
- Commit message:
- 1st build
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BMP085.lib Fri Jul 11 00:56:46 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/okini3939/code/BMP085/#5e2b1f3c0a6a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCF2119.lib Fri Jul 11 00:56:46 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/okini3939/code/PCF2119/#27f430d086f3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WDT.lib Fri Jul 11 00:56:46 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/okini3939/code/WDT/#f6f05e2eafd0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jul 11 00:56:46 2014 +0000
@@ -0,0 +1,207 @@
+/*
+ * Barometer for EA LPC11U35 QuickStart Board
+ */
+#include "mbed.h"
+#include "PCF2119.h"
+#include "BMP085.h"
+#include "WDT.h"
+
+DigitalOut myled(LED1), led_r(P0_22), led_g(P1_15), led_b(P0_23);
+I2C i2c(P0_5, P0_4);
+PCF2119 lcd(i2c, P0_21);
+BMP085 bmp(i2c, BMP085_oss8);
+Watchdog wdt;
+AnalogIn vsens(P0_11);
+DigitalOut vpwr(P0_12);
+
+float p, t, b;
+float vals[35];
+float ave = 0;
+int count = 0, ud = 0;
+
+char gaiji[5][8] = {
+ {0x0e, 0x1b, 0x11, 0x11, 0x11, 0x11, 0x1f, 0},
+ {0x0e, 0x1b, 0x11, 0x11, 0x11, 0x1f, 0x1f, 0},
+ {0x0e, 0x1b, 0x11, 0x11, 0x1f, 0x1f, 0x1f, 0},
+ {0x0e, 0x1b, 0x11, 0x1f, 0x1f, 0x1f, 0x1f, 0},
+ {0x0e, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0},
+};
+char graph[16][8];
+char updown[3] = {0x12, 0x32, 0x10};
+
+// draw screen
+void draw () {
+ int i, n;
+ float min, max, v;
+ int bit, byte;
+
+ // check min/max
+ min = vals[0];
+ max = vals[0];
+ for (i = 0; i < 35; i ++) {
+ if (vals[i] > 800 && vals[i] < 1200) {
+ if (vals[i] < min) min = vals[i];
+ if (vals[i] > max) max = vals[i];
+ }
+ }
+ min -= 0.5;
+ max += 0.5;
+ v = max - min;
+
+ // create graph
+ memset(&graph, 0, sizeof(graph));
+ bit = 1;
+ byte = 6;
+ for (i = 0; i < 35; i ++) {
+ n = (vals[i] - min) / v * 15.0;
+ if (n >= 0 && n <= 7) {
+ graph[7 + byte][7 - n] |= bit;
+ } else
+ if (n >= 8 && n <= 15) {
+ graph[byte][15 - n] |= bit;
+ }
+
+ bit = bit << 1;
+ if (bit & 0x20) {
+ bit = 1;
+ byte --;
+ if (byte < 0) break;
+ }
+ }
+
+ // graph to font
+ for (i = 0; i < 7; i ++) {
+ lcd.cgram(i, graph[i], 8);
+ lcd.cgram(7 + i, graph[7 + i], 8);
+ }
+
+ // battery to font
+ i = (b - 2.8) / 0.1 + 0.05;
+ if (i < 0) i = 0;
+ if (i > 4) i = 4;
+ lcd.cgram(15, gaiji[i], 8);
+
+ lcd.cls();
+ // graph, pressure
+ lcd.locate(0, 0);
+ lcd.printf("\xf0\xf1\xf2\xf3\xf4\xf5\xf6%4.1fhPa", p + 0.05);
+ lcd.locate(0, 1);
+ lcd.printf("\x07\xf8\xf9\xfa\xfb\xfc\xfd %2.1fc", t + 0.05);
+ // up/down mark
+ lcd.raw = 1;
+ lcd.locate(7, 1);
+ lcd.putc(updown[ud + 1]);
+ lcd.raw = 0;
+ // battery gauge
+ lcd.locate(15, 1);
+ lcd.printf("\xff");
+}
+
+// up/down
+void check () {
+ int i;
+ float sum;
+
+ sum = 0;
+ for (i = 0; i < 34; i ++) {
+ if (vals[i + 1] < 800 || vals[i + 1] > 1200) break;
+ sum += (vals[i] - vals[i + 1]);
+ if (sum > 1) {
+ ud = 1; // up
+ break;
+ } else
+ if (sum < -1) {
+ ud = -1; // down
+ if (i < 10) ud = -2;
+ break;
+ }
+ }
+}
+
+void sample () {
+ int i;
+
+ // BMP180
+ bmp.update();
+ p = bmp.get_pressure();
+ t = bmp.get_temperature();
+
+ ave += p;
+ count ++;
+ if (count >= 6) {
+ // average 6 min.
+ count = 0;
+ ave = ave / 6;
+ // shift buffer
+ for (i = 34; i >= 1; i --) {
+ vals[i] = vals[i - 1];
+ }
+ vals[0] = ave;
+ ave = 0;
+
+ // ADC (battery)
+ vpwr = 1;
+ wait_ms(10);
+ b = 2.495 / vsens;
+ vpwr = 0;
+
+ check();
+ draw();
+ } else {
+ lcd.locate(7, 0);
+ lcd.printf("%4.1fhPa", p + 0.05);
+ lcd.locate(9, 1);
+ lcd.printf("%2.1fc", t + 0.05);
+ }
+}
+
+int main() {
+ int w;
+
+ myled = 0;
+ led_r = led_g = led_b = 1;
+ memset(&vals, 0, sizeof(vals));
+ i2c.frequency(400000);
+
+ lcd.cls();
+ lcd.printf("Barometer");
+ led_r = 0;
+ wait_ms(300);
+ led_r = 1;
+ led_g = 0;
+ wait_ms(300);
+ led_g = 1;
+ led_b = 0;
+ wait_ms(300);
+ led_b = 1;
+
+ sample();
+ vpwr = 1;
+ wait_ms(10);
+ b = 2.495 / vsens; // battery
+ vpwr = 0;
+ draw();
+
+ for (;;) {
+ if (ud > 0) {
+ led_r = 0; // up
+ } else
+ if (ud < 0) {
+ led_b = 0; // down
+ if (ud < -1) led_g = 0;
+ } else {
+ led_g = 0;
+ }
+
+ w ++;
+ if (w >= 20) {
+ w = 0;
+ sample(); // 1 min.
+ } else {
+ wait_ms(1);
+ }
+ led_r = led_g = led_b = 1;
+ wdt.attach(NULL, 3); // wdt interrupt
+ wdt.deepSleep();
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Jul 11 00:56:46 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/04dd9b1680ae \ No newline at end of file