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Dependents: X_NUCLEO_IKS01A1 X_NUCLEO_6180XA1 1-DoorCloser 1-DoorCloser ... more
Fork of
X_NUCLEO_COMMON
by 
ST Expansion SW Team
Generic mbed Extensions used by STM Expansion Board Firmware Packages
DbgMCU
Helper class DbgMCU providing a default constructor which enables debugging on STM32 MCUs while using sleep modes.
DevI2C
Helper class DevI2C providing functions for multi-register I2C communication common for a series of I2C devices.
DevSPI
Helper class DevSPI providing functions for SPI communication common for a series of SPI devices.
Revision 3:bc5fc631e9c5, committed 2015-04-29
- Comitter:
- Wolfgang Betz
- Date:
- Wed Apr 29 16:14:03 2015 +0200
- Parent:
- 2:c1cac955d4bd
- Child:
- 4:33ee0cf483de
- Commit message:
- Added some important safety checks
Changed in this revision
| DevI2C/DevI2C.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/DevI2C/DevI2C.h Tue Apr 14 15:32:06 2015 +0200
+++ b/DevI2C/DevI2C.h Wed Apr 29 16:14:03 2015 +0200
@@ -64,7 +64,9 @@
* @param RegisterAddr specifies the internal address register
* where to start writing to (must be correctly masked).
* @param NumByteToWrite number of bytes to be written.
- * @retval 0 if ok, -1 if an I2C error has occured
+ * @retval 0 if ok,
+ * -1 if an I2C error has occured, or
+ * -2 on temporary buffer overflow (i.e. NumByteToWrite was too high)
* @note On some devices if NumByteToWrite is greater
* than one, the RegisterAddr must be masked correctly!
*/
@@ -72,8 +74,10 @@
uint16_t NumByteToWrite)
{
int ret;
- uint8_t tmp[32];
+ uint8_t tmp[TEMP_BUF_SIZE];
+ if(NumByteToWrite >= TEMP_BUF_SIZE) return -2;
+
/* First, send device address. Then, send data and STOP condition */
tmp[0] = RegisterAddr;
memcpy(tmp+1, pBuffer, NumByteToWrite);
@@ -110,6 +114,9 @@
if(ret) return -1;
return 0;
}
+
+ private:
+ static const unsigned int TEMP_BUF_SIZE = 32;
};
#endif /* __DEV_I2C_H */