Ixox
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Everything is working fine, so here are my files. https://github.com/Ixox/midibox-SID I didn't have time to play a lot with this great machine, but i'm very very happy with the result : Looks great Sounds fantastic The 3 analogs Knobs are very usefull (awesome on Filter Freq and Detune) The oled screen is readable under any angle Powered through a single power cable (Transformer is in the rack). Active mixer (-12/+12 v) for all 4 full volume voices mixed together... or independant output when plugged. 1U rack allow it to be always usable ever if my desk is a big mess ! Thanks a lot Thorsten for all you work that allowed me to spend a great time building this Xavier
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Everything is now powered with the meanwell rt-65b power supply and the signal/noise ratio is very good. All 4 boards are in place, though i only have 3 pairs of 8580. I still have a few things to check/fix/finish then i'll post all my files in case someone is interested.
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Yep... The rack is the 1U here : http://www.frontpanels.de/nrg-case-19-enclosures/ They also made the panels. Frank does a great job with this site ! The mounting rails are usefull to put the PCB in place without drilling the case. Xavier
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Thanks :) I use SID 8580 only. With only 1 board, the ratio signal/noise is very good. I have 2 transformers 6Vac and 9Vac, that goes to the boards in parallel. Each board has 2 diode bridges, one 7805 and one 7809. The result is a high background noise as soon as i plug a second board. The meanwell rt-65b is a switching power supply which has a very good reputation among eurorack users. It provides a triple output : 5v, 12v and -12v and one ground. I need the -12v for my mixing PCB. And it's 38mm high which is perfect for the 1U racks. I should have it early next week. Xavier
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Work in progress. The background noise is terrible with the current solution when i power more than 1 voice card. I assume it's because of the multiple ground reference. I'm waiting for a RT-65b power supply and hope it will fix the problem.
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OK I got it :) I was touching " TRISB[3:0]" during the wait_unbusy loop. I now have a OLED compatible display driver that do not kill CAN communication :)
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I have some news. I got the communication working if i remove the custom LCD code (MIOS_LCD_TypeSet set to 0x7) and put back my LCD display. With my custom OLED driver, the CAN is broken. Thorsten, if you read this, where is Init_Port ? It's written in the LCD driver : "Initialization of Ports: done in Init_Port" As the CAN pin is mapped on the old pin3 of the LCD driver, i think that can be the cause of the problem. Custom LCD de-init ECAN ? Do you have any idea ? Thanks
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Hi Jeppe, I have this same problem, maybe you found what was wrong ? Is it supposed to work with any number of slaves ? I only have one master and one slave for the moment. Pic IDs are 0 and 1. MIOS and firmware are flashed on both. Diode is in place on each board, RB3 pin is pulled up on the master. Master and Slave are connected through this pin. When i select other than SID1 i get "SID(x) not available (CAN disabled)"". Any idea of what can be wrong ? Or anything else i can check ? EDITED : Firmware on PIC ID=1 is OK. If i plug the display to the PIC1 board it boots and display "CS disabled". Xavier
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PCBs arrived... I soldered the Mainboard and it works fine (sound, midi, mem, display, DIN). But i found a few mistakes, i'll fix them in SIDMB v0.4. If you have small PCBs (<10cmx10cm) to make, look at elecrow.com, prices are amazing and service is great. I just ordered the front and rear panel. Next step, solder the other PCBs and put everything in the rack. Xavier
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I've ordered the PCBs with this aditional one : This will mix all SID's voices to the main right and left jacks. Pluging individual SID2, 3 or 4 jack will remove them from the mix. Copied from Ambika mixer This one requires a dedicated -9/+9 DC but it can be done with a very small transformer. Xavier
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Yes thanks for you old post. Very usefull :) I'm not sure the MIOS clcd driver initializes perfectly the 4 bits mod. http://svnmios.midibox.org/filedetails.php?repname=svn.mios&path=%2Ftrunk%2Fmios%2Fmios_clcd.inc Look at page 46 of the HD44780 spec : https://www.sparkfun.com/datasheets/LCD/HD44780.pdf The app_lcd.inc i attached follows it more strictly. Also i think the clear() commands should have a wait of 2ms. It's not very clear in the spec as the 1.52ms is mentioned for the "return home" function, but that was a bloker for my OLED to work, and it's what LiquidCrystal (HD44700 famous library) does. Best, Xavier
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Hi, I worked a little to get my OLED display working with the SID firmware. It didn't work with the out of the box MIOS driver, my oled remained totally black. Here is the OLED i have. It's now working wotj the following modifications. What must be done is to enable Custom LCD in main.inc USER_Init function. ;; CUSTOM LCD movlw 0x07 call MIOS_LCD_TypeSet Then replace app_lcd.inc by the one attached here in "midibox_sid_v2_044/src". It's based on the file found here with some init sequence and timing modifications. Best, Xavier app_lcd.inc app_lcd.inc
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OK will be easy to move the right group of track to the left. There's space. thanks :) Trace widths is 8mil. It's Kicad default. That's what i used for the preenfm2 PCB it works well. I may make them wider for the analog part though. Power trace width are 16. Yes the four banksticks can be 1234 or 5678 depending of mem_sel switch in the top left which sets 24LC512 A2 pin to GND or 5V. They are not by default connected to pic. Need 2 jumpers P4=>P3. Top left. Master PCB/PIC : P4=>P3 shorted. Bankstick set to 1234. And the 2 left pins of P3 connected to the first salve PCB P3. Slave PCB/PIC #1 : P4=>P3 free. Bankstick set to 5678. And P3 connected to the master P3. Banksticks on this PCB are so seen by the master PIC only. Like this the Master PIC see 8 banksticks.
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New version with some modifs : . SID area ground . More conveniant J5 . moved LCD contrast pot . Add little space around the regulator
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OK i found that for the SID grounding : http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_base_pcb.pdf Interesting :)
