MQX Software SolutionsのトピックIssue using breakpoints with MQX ADC driver in Kinetis https://community.nxp.com/t5/MQX-Software-Solutions/Issue-using-breakpoints-with-MQX-ADC-driver-in-Kinetis/m-p/195434#M4024 <HTML><HEAD></HEAD><BODY><P>As of MQX v3.8.1, when debugging your MQX application, you may notice that the lwevent used by the ADC driver stops occurring.</P><P></P><P><SPAN style="font-size: 10.5pt; font-family: 'Helvetica Neue'; color: #51626f; background: white;">Unfortunately you should not use the debugger or set a breakpoint when you are using the ADC. Because the ADC driver in MQX is using the PDB to generate the sample rate, when the debugger stops when a breakpoint is reached, the PDB keeps counting but the ADC triggers are not generated so the ADC conversions stop working. In other words, the PDB can’t be halted when debugging.&nbsp;&nbsp; Description of the problem with the PDB-A/D mechanism: While using the PDB to trigger the Kinetis ADC modules, the PDB invokes an ADC conversion on every PDB period expiration. This is true until the MCU reaches a breakpoint or is stopped for debug: when the MCU resumes operation, the PDB does not invoke ADC conversions anymore, and the ERR flag at the PDB_CHxS register is set. </SPAN></P></BODY></HTML> Fri, 30 Nov 2012 18:19:57 GMT dereksnell 2012-11-30T18:19:57Z Issue using breakpoints with MQX ADC driver in Kinetis https://community.nxp.com/t5/MQX-Software-Solutions/Issue-using-breakpoints-with-MQX-ADC-driver-in-Kinetis/m-p/195434#M4024 <HTML><HEAD></HEAD><BODY><P>As of MQX v3.8.1, when debugging your MQX application, you may notice that the lwevent used by the ADC driver stops occurring.</P><P></P><P><SPAN style="font-size: 10.5pt; font-family: 'Helvetica Neue'; color: #51626f; background: white;">Unfortunately you should not use the debugger or set a breakpoint when you are using the ADC. Because the ADC driver in MQX is using the PDB to generate the sample rate, when the debugger stops when a breakpoint is reached, the PDB keeps counting but the ADC triggers are not generated so the ADC conversions stop working. In other words, the PDB can’t be halted when debugging.&nbsp;&nbsp; Description of the problem with the PDB-A/D mechanism: While using the PDB to trigger the Kinetis ADC modules, the PDB invokes an ADC conversion on every PDB period expiration. This is true until the MCU reaches a breakpoint or is stopped for debug: when the MCU resumes operation, the PDB does not invoke ADC conversions anymore, and the ERR flag at the PDB_CHxS register is set. </SPAN></P></BODY></HTML> Fri, 30 Nov 2012 18:19:57 GMT https://community.nxp.com/t5/MQX-Software-Solutions/Issue-using-breakpoints-with-MQX-ADC-driver-in-Kinetis/m-p/195434#M4024 dereksnell 2012-11-30T18:19:57Z