topic problem with simple program with hsadc in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593763#M22540 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by leform14 on Wed Apr 20 16:32:37 MST 2016</STRONG><BR /><SPAN>Hello all,</SPAN><BR /><BR /><SPAN>I am sur that someone have a solution for me, there is my problem :</SPAN><BR /><BR /><SPAN>I have to capture a signal (100 kHz on CTOUT_0) with hsadc at 1 Mhz, in order to do that I try a lot and a lot of things compare to examples and labtool but that still doesn't work.</SPAN><BR /><BR /><SPAN>I do this :</SPAN><BR /><BR /><SPAN>Configure clock for HSADC (verify by Chip_HSADC_GetBaseClockRate and with scope on CLK_BASE_OUT) : OK</SPAN><BR /><SPAN>Configure fifo size at 8 with packed value</SPAN><BR /><SPAN>Activate 8 descriptor from table 0</SPAN><BR /><SPAN>Configure trigger on rising edge of CTOUT_0</SPAN><BR /><SPAN>For descriptor 0 , set HSADC_DESC_BRANCH_NEXT | HSADC_DESC_MATCH(0x90)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>For descriptor 1 to 6, set HSADC_DESC_BRANCH_NEXT | HSADC_DESC_MATCH(1)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>For descriptor 7, set HSADC_DESC_HALT | HSADC_DESC_MATCH(1)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>Enable interrupts HSADC_INT0_FIFO_FULL</SPAN><BR /><SPAN>Start by Chip_HSADC_SWTrigger</SPAN><BR /><BR /><SPAN>I simply retrieve first 16 samples (8 fifos with packed samples) and I see discontinuous values that doesn't match with 1 Mhz sampling rate instead of :</SPAN><BR /><BR /><SPAN>L L L L LL H H H H H H</SPAN><BR /><BR /><SPAN>Maybe the sens can be different but that must do this.</SPAN><BR /><BR /><SPAN>What I have is :</SPAN><BR /><BR /><SPAN>L L H H L L H H L L H H L L H H</SPAN><BR /><BR /><SPAN>Somebody sees something that I could have forgotten ?</SPAN><BR /><BR /><SPAN>Please help me, all needs can be helpful.</SPAN><BR /><BR /><SPAN>Best regards,</SPAN><BR /><BR /><SPAN>Mickael</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:21:23 GMT lpcware 2016-06-15T19:21:23Z problem with simple program with hsadc https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593763#M22540 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by leform14 on Wed Apr 20 16:32:37 MST 2016</STRONG><BR /><SPAN>Hello all,</SPAN><BR /><BR /><SPAN>I am sur that someone have a solution for me, there is my problem :</SPAN><BR /><BR /><SPAN>I have to capture a signal (100 kHz on CTOUT_0) with hsadc at 1 Mhz, in order to do that I try a lot and a lot of things compare to examples and labtool but that still doesn't work.</SPAN><BR /><BR /><SPAN>I do this :</SPAN><BR /><BR /><SPAN>Configure clock for HSADC (verify by Chip_HSADC_GetBaseClockRate and with scope on CLK_BASE_OUT) : OK</SPAN><BR /><SPAN>Configure fifo size at 8 with packed value</SPAN><BR /><SPAN>Activate 8 descriptor from table 0</SPAN><BR /><SPAN>Configure trigger on rising edge of CTOUT_0</SPAN><BR /><SPAN>For descriptor 0 , set HSADC_DESC_BRANCH_NEXT | HSADC_DESC_MATCH(0x90)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>For descriptor 1 to 6, set HSADC_DESC_BRANCH_NEXT | HSADC_DESC_MATCH(1)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>For descriptor 7, set HSADC_DESC_HALT | HSADC_DESC_MATCH(1)| HSADC_DESC_THRESH_NONE |HSADC_DESC_RESET_TIMER</SPAN><BR /><SPAN>Enable interrupts HSADC_INT0_FIFO_FULL</SPAN><BR /><SPAN>Start by Chip_HSADC_SWTrigger</SPAN><BR /><BR /><SPAN>I simply retrieve first 16 samples (8 fifos with packed samples) and I see discontinuous values that doesn't match with 1 Mhz sampling rate instead of :</SPAN><BR /><BR /><SPAN>L L L L LL H H H H H H</SPAN><BR /><BR /><SPAN>Maybe the sens can be different but that must do this.</SPAN><BR /><BR /><SPAN>What I have is :</SPAN><BR /><BR /><SPAN>L L H H L L H H L L H H L L H H</SPAN><BR /><BR /><SPAN>Somebody sees something that I could have forgotten ?</SPAN><BR /><BR /><SPAN>Please help me, all needs can be helpful.</SPAN><BR /><BR /><SPAN>Best regards,</SPAN><BR /><BR /><SPAN>Mickael</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:21:23 GMT https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593763#M22540 lpcware 2016-06-15T19:21:23Z Re: problem with simple program with hsadc https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593764#M22541 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by leform14 on Mon Apr 25 03:25:04 MST 2016</STRONG><BR /><SPAN>I update my results,</SPAN><BR /><BR /><SPAN>I pass directly to DMA managment with HSADC. I am still on my 100 kHz input sampling at 1 MHz. I control value by Debug UART and I remark that I must set 4 Mhz in order to have my sampling rate of 1 MHz. How can I reach 80 MHz in that case as max input of HSADC clock is 80 Mhz ?</SPAN><BR /><BR /><SPAN>Thanks in advance</SPAN><BR /><BR /><SPAN>Mickael</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:21:24 GMT https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593764#M22541 lpcware 2016-06-15T19:21:24Z Re: problem with simple program with hsadc https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593765#M22542 <HTML><HEAD></HEAD><BODY><SPAN>bump</SPAN></BODY></HTML> Sun, 19 Jun 2016 01:08:54 GMT https://community.nxp.com/t5/LPC-Microcontrollers/problem-with-simple-program-with-hsadc/m-p/593765#M22542 lpcware 2016-06-19T01:08:54Z