added debug output to read of I2cComIf
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3f6d2b6083
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@ -146,10 +146,16 @@ ReturnValue_t I2cComIF::requestReceiveMessage(CookieIF *cookie,
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uint8_t* replyBuffer = i2cDeviceMapIter->second.replyBuffer.data();
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if (read(fd, replyBuffer, requestLen) != static_cast<int>(requestLen)) {
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int readLen = read(fd, replyBuffer, requestLen);
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if (readLen != static_cast<int>(requestLen)) {
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#if FSFW_VERBOSE_LEVEL >= 1 and FSFW_CPP_OSTREAM_ENABLED == 1
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sif::error << "I2cComIF::requestReceiveMessage: Reading from I2C "
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<< "device failed with error code " << errno <<". Description"
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<< " of error: " << strerror(errno) << std::endl;
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sif::error << "I2cComIF::requestReceiveMessage: Read only " << readLen << " from "
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<< requestLen << " bytes" << std::endl;
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#endif
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i2cDeviceMapIter->second.replyLen = 0;
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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@ -12,6 +12,8 @@
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* @brief This is the communication interface for i2c devices connected
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* to a system running a linux OS.
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*
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* @note The xilinx linux kernel does not support to read more than 255 bytes at once.
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*
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* @author J. Meier
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*/
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class I2cComIF: public DeviceCommunicationIF, public SystemObject {
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