Kim Mansfield
This shows a problem with the I2C and analogin being used at the same time.
Revision 0:f3b6111994f0, committed 2016-10-27
- Comitter:
- kmansfie
- Date:
- Thu Oct 27 18:12:20 2016 +0000
- Commit message:
- This contains an issue with the I2C when combined with an analogin.
Changed in this revision
diff -r 000000000000 -r f3b6111994f0 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Oct 27 18:12:20 2016 +0000
@@ -0,0 +1,99 @@
+#include "mbed.h"
+#include "rtos.h"
+#include <stdio.h>
+
+I2C i2c(PB_7, PB_6);
+DigitalOut led_1(LED1);
+AnalogIn heaterInput_pin(A2);
+Serial pc(SERIAL_TX, SERIAL_RX);
+const int ADDR = 0x80;
+
+void blink()
+{
+ led_1 = !led_1;
+}
+
+void blink_thread(void const *argument)
+{
+ while (true){
+ Thread::wait(500);
+ blink();
+ }
+}
+
+int X0,X1,Y0,Y1,Y2,Y3;
+double X,Y,X_out,Y_out1,Y_out2;
+
+void
+i2cHandler()
+{
+ char cmd[2];
+ pc.printf("\r\nStart getTempRH\r\n");
+ //while (1) {
+ cmd[0] = 0xE3;
+ cmd[1] = 0x00;
+ i2c.write(ADDR, cmd, 1);
+ wait(0.1);
+ cmd[0] = 0x00;
+ i2c.write(ADDR, cmd, 0);
+ i2c.read(ADDR, cmd, 2);
+
+ X0 = cmd[0];
+ X0 = X0 << 8;
+ X1 = cmd[1];
+ X_out = X0+X1;
+ /**Calculate and display temperature**/
+ X=(175.72*X_out)/65536;
+ X=X-46.85;
+ pc.printf("T:%f,\r\n",X);
+
+ wait(0.1);
+
+ cmd[0] = 0xE5;
+ cmd[1] = 0x00;
+ i2c.write(ADDR, cmd, 1);
+
+ wait(0.1);
+
+ cmd[0] = 0x00;
+ i2c.write(ADDR, cmd, 0);
+ i2c.read(ADDR, cmd, 2);
+ Y0 = cmd[0];
+ Y2 = Y0/100;
+ Y0 = Y0%100;
+ Y1 = cmd[1];
+ Y_out1 = Y2*25600;
+ Y_out2 = Y0*256+Y1;
+
+ /**Calculate and display relative humidity**/
+ Y_out1 = (125*Y_out1)/65536;
+ Y_out2 = (125*Y_out2)/65536;
+ Y = Y_out1+Y_out2;
+ Y=Y-6;
+ pc.printf("Rh:%f}\r\n",Y);
+
+ wait(0.1);
+
+ //float tmp = (float((cmd[0]<<8)|cmd[1]) / 256.0);
+ //printf("Temp = %.2f\n", tmp);
+ //}
+}
+
+void i2c_thread(void const *argument)
+{
+ while (true){
+ Thread::wait(500);
+ i2cHandler();
+ }
+}
+
+int main() {
+ pc.baud(115200);
+ Thread doi2c(i2c_thread, NULL, osPriorityLow, DEFAULT_STACK_SIZE);
+ Thread blinkLED(blink_thread, NULL, osPriorityLow, DEFAULT_STACK_SIZE);
+
+ while(1)
+ {
+ Thread::wait(10);
+ }
+}
diff -r 000000000000 -r f3b6111994f0 mbed-rtos.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Thu Oct 27 18:12:20 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#3da5f554d8bf
diff -r 000000000000 -r f3b6111994f0 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Oct 27 18:12:20 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/25aea2a3f4e3 \ No newline at end of file