LPC Microcontrollers中的主题 LPC8N04 PMU register errors https://community.nxp.com/t5/LPC-Microcontrollers/LPC8N04-PMU-register-errors/m-p/1084188#M41638 <HTML><HEAD></HEAD><BODY><P>Hi All</P><P></P><P>This is not a question but an answer to an issue we were having where non-optimised code worked and optimised code didn't work when using PMU registers of the LPC8N04.</P><P></P><P>If you are having this issue the problem is caused by the PMU access loops in the API getting optimised out.</P><P>Solve by wrapping the 'POWER_ReadPmuReg()' and 'POWER_WritePmuReg()' functions with the following to stop optimisation:</P><P></P><P>#pragma GCC push_options<BR />#pragma GCC optimize ("O0")</P><P>...</P><P>...</P><P>...</P><P>#pragma GCC pop_options</P><P></P><P>Hope this is helpful to someone and saves some frustration.</P><P>Ken...</P></BODY></HTML> Tue, 23 Jun 2020 19:43:23 GMT kenchill 2020-06-23T19:43:23Z LPC8N04 PMU register errors https://community.nxp.com/t5/LPC-Microcontrollers/LPC8N04-PMU-register-errors/m-p/1084188#M41638 <HTML><HEAD></HEAD><BODY><P>Hi All</P><P></P><P>This is not a question but an answer to an issue we were having where non-optimised code worked and optimised code didn't work when using PMU registers of the LPC8N04.</P><P></P><P>If you are having this issue the problem is caused by the PMU access loops in the API getting optimised out.</P><P>Solve by wrapping the 'POWER_ReadPmuReg()' and 'POWER_WritePmuReg()' functions with the following to stop optimisation:</P><P></P><P>#pragma GCC push_options<BR />#pragma GCC optimize ("O0")</P><P>...</P><P>...</P><P>...</P><P>#pragma GCC pop_options</P><P></P><P>Hope this is helpful to someone and saves some frustration.</P><P>Ken...</P></BODY></HTML> Tue, 23 Jun 2020 19:43:23 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC8N04-PMU-register-errors/m-p/1084188#M41638 kenchill 2020-06-23T19:43:23Z Re: LPC8N04 PMU register errors https://community.nxp.com/t5/LPC-Microcontrollers/LPC8N04-PMU-register-errors/m-p/1084189#M41639 <HTML><HEAD></HEAD><BODY><P>Hi, Ken,</P><P>Thank you for your kindness, I think it is helpful to the other engineers.</P><P>BR</P><P>XiangJun Rong</P></BODY></HTML> Mon, 29 Jun 2020 05:44:07 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC8N04-PMU-register-errors/m-p/1084189#M41639 xiangjun_rong 2020-06-29T05:44:07Z