Yoonseok Pyo
TestSRF08 SRF08, I2C
Revision 0:ae88fe3b5508, committed 2013-03-03
- Comitter:
- passionvirus
- Date:
- Sun Mar 03 11:30:06 2013 +0000
- Commit message:
- create TestSRF08
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.lib | 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 Sun Mar 03 11:30:06 2013 +0000
@@ -0,0 +1,34 @@
+#include "mbed.h"
+
+Serial pc(USBTX,USBRX); // Tx, Rx Pin, default boud = 9600
+I2C i2c(p28, p27); // SDA, SCL
+
+int main()
+{
+ char cmd[2]; // Command
+ char echo[2]; // Echo result data (8bit)
+ int addr = 0xE0; // Defalut I2C address of SRF08
+ int range = 0; // Rage data (16bit, cm)
+
+ cmd[0] = 0x02; // Register(RangeValue)
+ cmd[1] = 0x45; // (RangeValue*43)+43 = (69*43)+43 = 3010mm, maximum range
+ i2c.write(addr,cmd,2); // Send I2C data (8bit*2)
+
+ while(1)
+ {
+ cmd[0] = 0x00; // Register(Command)
+ cmd[1] = 0x51; // Ranging mode - Result in centimeters
+ i2c.write(addr,cmd,2); // Send I2C data (8bit*2)
+
+ wait(0.07); // Wait 70ms
+
+ cmd[0] = 0x02; // Register(1st Echo)
+ i2c.write(addr,cmd,1); // Send I2C data (8bit*1)
+ i2c.read(addr,echo,2); // Read I2C data (8bit*2)
+
+ range = (echo[0]<<8)+echo[1]; // 8bit+8bit=16bit
+
+ pc.printf("Range : %d cm\n",range);
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.lib Sun Mar 03 11:30:06 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/#3d0ef94e36ec