LPC Microcontrollers中的主题 LPC1857 Flash Issues https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-Flash-Issues/m-p/537465#M11461 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by dsidlauskas on Thu Jun 19 12:47:25 MST 2014</STRONG><BR /><SPAN>I have a project that puts all code in Flash Bank A, so that Bank A has a valid code signature. I have a constant data structure located at the beginning of BANK B. When I inadvertently set the first 8 words of this structure to 0, the program stopped loading correctly at startup. </SPAN><BR /><BR /><SPAN>Fig. 10 and Section 4.3.1 of the LPC1857 manual states the if Bank A contains a valid signature, then Bank A will be taken as the boot loader image regardless of the signature in Bank B. My experience suggests that this is not the case.</SPAN><BR /><BR /><SPAN>I'm using Keil Uv4. When the first 8 words in bank B are 0, the debugger starts with the PC and SP at zero. When they're non-zero the PC and SP are set correctly to run the code in Bank A.</SPAN><BR /><BR /><SPAN>Does anyone have any comments on what's going on?</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Dave</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:20:59 GMT lpcware 2016-06-15T18:20:59Z LPC1857 Flash Issues https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-Flash-Issues/m-p/537465#M11461 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by dsidlauskas on Thu Jun 19 12:47:25 MST 2014</STRONG><BR /><SPAN>I have a project that puts all code in Flash Bank A, so that Bank A has a valid code signature. I have a constant data structure located at the beginning of BANK B. When I inadvertently set the first 8 words of this structure to 0, the program stopped loading correctly at startup. </SPAN><BR /><BR /><SPAN>Fig. 10 and Section 4.3.1 of the LPC1857 manual states the if Bank A contains a valid signature, then Bank A will be taken as the boot loader image regardless of the signature in Bank B. My experience suggests that this is not the case.</SPAN><BR /><BR /><SPAN>I'm using Keil Uv4. When the first 8 words in bank B are 0, the debugger starts with the PC and SP at zero. When they're non-zero the PC and SP are set correctly to run the code in Bank A.</SPAN><BR /><BR /><SPAN>Does anyone have any comments on what's going on?</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Dave</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:20:59 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-Flash-Issues/m-p/537465#M11461 lpcware 2016-06-15T18:20:59Z Re: LPC1857 Flash Issues https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-Flash-Issues/m-p/537466#M11462 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by bavarian on Mon Jun 30 05:13:09 MST 2014</STRONG><BR /><SPAN>Hello David,</SPAN><BR /><BR /><SPAN>we had a batch of the LPC1857 which were not configured correctly.</SPAN><BR /><SPAN>They start from Flash bank #B instead of #A.</SPAN><BR /><BR /><SPAN>There is no chance to reverse this setting, you need to replace the chip in case you can't live with that behaviour.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>NXP Support Team</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:21:00 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-Flash-Issues/m-p/537466#M11462 lpcware 2016-06-15T18:21:00Z