LPC Microcontrollers中的主题 Static EMC_CS1 does multiple write cycles https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553297#M14538 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by khfreiberg on Thu Jul 17 15:51:56 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>I have a LPC4337 with a FPGA connected to static CS1 for 16 bit wide memory mapped hardware access. I have an external analyzer connected to see what the controller is doing.</SPAN><BR /><SPAN>What I see on the bus doesn't correspond to the code. Even when I single step through the code I see 8 write cycles on consequtive addresses for a single 32 bit write in the code.</SPAN><BR /><SPAN>It looks like paging, but the PM bit in STATICCONFIG1 is set to 'OFF'. I am writing 0x81 to the register and enable the buffer that's it. Reading back 0x40005220 show 0x00080081 as expected.</SPAN><BR /><SPAN>Can anybody tell me which other register is controlling this? </SPAN></BODY></HTML> Wed, 15 Jun 2016 18:37:40 GMT lpcware 2016-06-15T18:37:40Z Static EMC_CS1 does multiple write cycles https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553297#M14538 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by khfreiberg on Thu Jul 17 15:51:56 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>I have a LPC4337 with a FPGA connected to static CS1 for 16 bit wide memory mapped hardware access. I have an external analyzer connected to see what the controller is doing.</SPAN><BR /><SPAN>What I see on the bus doesn't correspond to the code. Even when I single step through the code I see 8 write cycles on consequtive addresses for a single 32 bit write in the code.</SPAN><BR /><SPAN>It looks like paging, but the PM bit in STATICCONFIG1 is set to 'OFF'. I am writing 0x81 to the register and enable the buffer that's it. Reading back 0x40005220 show 0x00080081 as expected.</SPAN><BR /><SPAN>Can anybody tell me which other register is controlling this? </SPAN></BODY></HTML> Wed, 15 Jun 2016 18:37:40 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553297#M14538 lpcware 2016-06-15T18:37:40Z Re: Static EMC_CS1 does multiple write cycles https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553298#M14539 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by mc on Thu Jul 17 16:06:00 MST 2014</STRONG><BR /><SPAN>Hi khfreiberg,</SPAN><BR /><SPAN>Please see below thread.</SPAN><BR /><SPAN><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.lpcware.com%2Fcontent%2Fforum%2Femc-generates-double-read-cycles-static-chip-selects%23comment-1135927" rel="nofollow" target="_blank">http://www.lpcware.com/content/forum/emc-generates-double-read-cycles-static-chip-selects#comment-1135927</A></SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:37:41 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553298#M14539 lpcware 2016-06-15T18:37:41Z Re: Static EMC_CS1 does multiple write cycles https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553299#M14540 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by wmues on Fri Jul 18 07:40:56 MST 2014</STRONG><BR /><SPAN>Have you tried to disable the buffer?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:37:41 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Static-EMC-CS1-does-multiple-write-cycles/m-p/553299#M14540 lpcware 2016-06-15T18:37:41Z