#qi-hardware IRC log for Thursday, 2012-08-30

kristianpaulxiangfu: what happended with the other only tx hdl code?14:51
kristianpaulI was wondering if the fpga4fun one was the only avaliable core...14:51
kristianpaulBtw i dint knew it about this BSCAN_SPARTAN614:52
xiangfu(what happended with the other only tx hdl code?) what do you mean?14:52
kristianpaulit dint work for you?14:53
kristianpaulor you need rx as well as tx?14:54
kristianpauli mean the serial/uart core you was looking last time14:54
xiangfuoh. 14:54
xiangfuI look at fpga4fun serial code. 14:55
xiangfuI connect the Rx_data under the verlog code. : http://pastebin.com/JqHSYnhq14:56
xiangfukristianpaul, there is a quiet good example on BSCAN_... : https://github.com/progranism/Open-Source-FPGA-Bitcoin-Miner/blob/master/projects/X6000_ztex_comm4/hdl/jtag_comm.v14:57
xiangfuI try to input data form serial core. and read the data out by using jtag. 14:58
xiangfuI can control LED by using BSCAN.. but i want more exactly data. 14:59
kristianpaulYeah i was about to ask you that (control by bscan)14:59
xiangfuBTW: I wrote a mini-jtag for learning: https://github.com/xiangfu/mini-jtag 15:00
xiangfuthat can re-configure/read idcode/load bistream to slx9. 15:01
xiangfuI have tested the code with m1. it works fine with m1(slx45) :)15:01
kristianpaulYeah i noticed it too :-)15:01
xiangfukristianpaul, (control by bscan) then take a look at : https://github.com/progranism/Open-Source-FPGA-Bitcoin-Miner/blob/master/projects/X6000_ztex_comm4/hdl/jtag_comm.v15:01
kristianpaulyup, looking at it15:02
kristianpaulhad you asked to azonenberg? perhaps you can use his uart core, so it can distributed in your examples15:07
kristianpauln8 :)15:08
whitequarkthis is a capture from an UART between an STM32 chip and a CP2102 USB-to-UART transceiver15:29
whitequarkwhy could it look like this?15:29
whitequarki.e. very high ripple15:30
qi-botThe build was successful: http://fidelio.qi-hardware.com/~xiangfu/build-nanonote/openwrt-xburst.minimal-20120829-1259 15:30
whitequarkI guess it's due to parasitic capacitors and inductors somewhere in the circuit15:32
kristianpaulperhaps you could do a loop in both devices send data and repeat the capture again to isolate a posible problem in one of then?..15:35
whitequarkhm, how would that help?15:36
whitequarkI don't quite get the idea15:36
kristianpaulwell you just said have to separate boards?15:37
kristianpaulor both ICs are in the same pcb?15:37
kristianpaulperhaps i was confused15:37
kristianpaulhelp to debug..15:37
whitequarksame pcb15:38
rzkwhitequark: place 10ohm inline15:53
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