Axel Utech
/
Nucleo_i2c_tmp102
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Revision 0:438eb5f101ce, committed 2014-11-05
- Comitter:
- aAXEe
- Date:
- Wed Nov 05 09:13:42 2014 +0000
- Commit message:
- basic handling working
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Nov 05 09:13:42 2014 +0000
@@ -0,0 +1,70 @@
+#include "mbed.h"
+
+#define TMP102_REG_TEMP (0x00) // Temperature Register
+#define TMP102_REG_CONF (0x01) // Configuration Register
+#define TMP102_ADDR (0x90) // address
+
+I2C i2c(I2C_SDA, I2C_SCL);
+
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+bool tmp102_write(uint8_t pointerReg, bool sendData, uint8_t data1, uint8_t data2){
+
+ if(!sendData){
+ return i2c.write(TMP102_ADDR, (char*) &pointerReg, 1, 0) == 0;
+ }
+
+ char buf[3];
+ buf[0] = pointerReg;
+ buf[1] = data1;
+ buf[2] = data2;
+
+ return i2c.write(TMP102_ADDR, buf, 3, 0) == 0;
+
+}
+
+bool tmp102_read(uint16_t* data){
+ return i2c.read(TMP102_ADDR, (char*) data, 2, 0) == 0;
+}
+
+int tmp102_test(){
+ int ret;
+ uint16_t value;
+
+ ret = tmp102_write(TMP102_REG_CONF, true, 0x60, 0x80);
+ if(!ret) return -1;
+
+ ret = tmp102_read(&value);
+ if(!ret) return -2;
+
+ ret = tmp102_write(TMP102_REG_TEMP, false, 0, 0);
+ if(!ret) return -3;
+
+ ret = tmp102_read(&value);
+ if(!ret) return -4;
+
+ return value;
+}
+
+
+// caculate temperatur in °C (works only for T > 0°C)
+double tmp102_convertTemp(uint16_t data){
+ uint16_t bin = (data >> 12) | (data << 4);
+ return (double)bin * 0.0625;
+}
+
+int main()
+{
+
+ printf("Hello TMP102\n");
+ while (1) {
+ int res = tmp102_test();
+ pc.printf("tmp102_test: %X\n", res);
+ printf("converted: %f\n", tmp102_convertTemp(res));
+ wait(1.0);
+ }
+
+}
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Nov 05 09:13:42 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/031413cf7a89 \ No newline at end of file