Diff: main.cpp

Revision:

0:308c98db9173

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun May 19 07:15:51 2013 +0000
@@ -0,0 +1,26 @@
+#include "mbed.h"
+#include "I2C.h"
+
+int main()
+{
+    const int len = 128;
+    char strs[2][len];
+
+    I2C i2c(p28, p27);
+    const uint32_t adr = 0x70<<1;
+    char rData[5];
+    char wData[5];
+
+    for(int i=0; i<2; i++) {
+        // read SW rev from register 0x00 from a srf08 ultra sonic ranger at i2c address 0x70/0xe0
+        wData[0] = 0x00; // register address
+        int wStat = i2c.write(adr,wData,1,1); // write register address and keep bus open, i.e. don't finish write sequence with an instnt stop condition
+        if(i)wait_us(23); // grant some time to the i2c HW to start the unintentional additional write
+        rData[0]=0xff;
+        int rStat = i2c.read(adr,rData,1); // read srf08's SW rev from register 0x00. If in time, the start condition at the beginning of the sequence would abort the unitended write
+        snprintf(strs[i],len,"wStat=0x%02X rStat=0x%02X rData=0x%02X %s\n",wStat,rStat,rData[0], ((wStat|rStat)?"OUCH!":"OK!"));
+    }
+    printf(strs[0]);
+    printf(strs[1]);
+    return 0;
+}
\ No newline at end of file