Tomo Yamanaka
/
Temperature_Sensor_Sample
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Revision 0:6e109b79e249, committed 2016-05-12
- Comitter:
- 1050186
- Date:
- Thu May 12 10:16:22 2016 +0000
- Commit message:
- first commit
Changed in this revision
diff -r 000000000000 -r 6e109b79e249 ADT7410.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADT7410.cpp Thu May 12 10:16:22 2016 +0000
@@ -0,0 +1,43 @@
+#include "mbed.h"
+#include "ADT7410.h"
+
+ADT7410::ADT7410(PinName sda, PinName scl) : i2c(sda, scl) {
+ // set config (16bit resolution)
+ send(ADT7410_CFG_ADDR, 0x80);
+}
+
+void ADT7410::send(char data_0, char data_1) {
+ buf[0] = data_0;
+ buf[1] = data_1;
+
+ i2c.write(ADT7410_I2C_ADDR, buf, 2);
+}
+
+void ADT7410::recv(char data) {
+ buf[0] = data;
+
+ // no stop condition (restared)
+ i2c.write(ADT7410_I2C_ADDR, buf, 1, true);
+ i2c.read(ADT7410_I2C_ADDR, buf, 2);
+}
+
+float ADT7410::temp_value() {
+ int temp;
+ float temp_fix;
+
+ // set config (16bit resolution with one shot mode)
+ send(ADT7410_CFG_ADDR, 0xA0);
+ wait_ms(250);
+ // recieve temperatue value(high and low)
+ recv(ADT7410_TMPH_ADDR);
+ temp = buf[0] << 0x08;
+ temp += buf[1];
+
+ if (temp & 0x8000) {
+ temp_fix = (float)(temp - 65536) / 128;
+ } else {
+ temp_fix = (float)temp / 128;
+ }
+
+ return temp_fix;
+}
diff -r 000000000000 -r 6e109b79e249 ADT7410.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADT7410.h Thu May 12 10:16:22 2016 +0000
@@ -0,0 +1,25 @@
+#ifndef ADT7410_H_
+#define ADT7410_H_
+
+#include "mbed.h"
+
+#define ADT7410_I2C_ADDR 0x90
+#define ADT7410_TMPH_ADDR 0x00
+#define ADT7410_CFG_ADDR 0x03
+
+class ADT7410 {
+public:
+ ADT7410(PinName sda, PinName scl);
+
+ void send(char data_0, char data_1);
+ void recv(char data);
+ float temp_value();
+
+protected:
+ I2C i2c;
+
+ char buf[2];
+
+};
+
+#endif /* ADT7410_H_ */
diff -r 000000000000 -r 6e109b79e249 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu May 12 10:16:22 2016 +0000
@@ -0,0 +1,18 @@
+#include "mbed.h"
+#include "ADT7410.h"
+
+ADT7410 sensor(I2C_SDA, I2C_SCL);
+DigitalOut led1(LED1);
+
+int main() {
+ float temp;
+
+ printf("Sensor start!\n");
+ led1 = 1;
+ while(1) {
+ temp = sensor.temp_value();
+ printf("Temperature = %2.2f\n",temp);
+ led1 = !led1;
+ wait_ms(250);
+ }
+}
diff -r 000000000000 -r 6e109b79e249 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu May 12 10:16:22 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/7c328cabac7e \ No newline at end of file