Urpo

Hi I got my sequencer finally built few days ago I was just wondering if I select from song menu tempo ramp down the lowest value I can set tempo is 25bpm. Why the lowest tempo value is 25 and not 2,5 bpm?

Now I feel soooo stupid... I couldn't see anything on the LCD because the text was too dim. I had to turn contrast potentiometer ALL the way to the left to get anything on my LCD (MC4002D7). Now everything seems to work fine. (And has been working all the time, I believe.) Tried both ways of programming; only bootloader and application and bootloader: both works. Without LCD information I wasn't able to tell did the application flashed ok or not. Sorry to trouble you with this. Again the fault was found between the driver's seat and a steering wheel.

Thanks for answering. I tested with a multimeter that both BLACK and BLUE buttons seems to be functional. I uploaded MIDIbox SEQ binary directly with ST-Link as you suggested and same happens as before except now i can't get any response from bootloader via MIDI_IO. Should ST-link start address be 0x08000000 ?

Hi. I'm trying to build MidiBox SEQ V4 and I am confused with MIOS. Could anyone help me to understand what am I doing wrong with it? So, I got my STM32 F4 (it says STM32F407VGT6 on the chip) connected it via ST-LINK and succesfully uploaded the mios32_bootloader_v1_018/MBHP_CORE_STM32F4/project.hex on it with STM ST-LINK utility using SWD port. To be sure, I compared the .hex vs. board memory with the same utility and no differences was found. At this stage if i connect MIDI_IO to core, connect USB cable to CN5 of STM32F4, start MIOS studio without pressing any buttons and select SB X-FI MIDI port for MIDI IN and MIDI OUT and hitting RESET I get on the lower text field: [10869.030] ==================== [10869.039] Bootloader 1.018 [10869.049] ==================== [10869.052] [10869.063] Checking Bootloader... [10869.340] No mismatches found. [10869.353] The bootloader is up-to-date! [10869.369] You can upload another application now! [10869.390] Or type 'help' in MIOS Terminal for additional options! I connected second USB cable to CN5 and while holding down blue USER I pressed black RESET button.( From now on I keep BLUE button held down.) Now, when I start MIOS studio 2.4.6 to upload the actual sequencer program and select "MIOS 32 Bootloader" for MIDI IN and MIDI OUT, I get: Operating System: MIOS32 Board: STM32F4DISCOVERY Core Family: STM32F4xx Chip ID: 0x10016413 Serial: #320025000347333234333738 Flash Memory Size: 1048576 bytes RAM Size: 196608 bytes MIOS32 Bootloader (c) 2014 T. Klose I select BROWSE and open midibox_seq_v4_089/MBHP_CORE_STM32F4/project.hex and get: Reading project.hex project.hex contains 393288 bytes (1537 blocks). Range 0x08000000-0x08003fff (16384 bytes) - BL excluded Range 0x08004000-0x080041ff (512 bytes) - STM32 Flash Range 0x08010000-0x0806beff (376576 bytes) - STM32 Flash Press start button to begin upload. By pressing start i get: Upload of 377088 bytes completed after 7.99s (46.08 kb/s) 1 ignorable errors during upload solved (no issue!) then the board resets and i get exactly same text on left screen as above. Questions: Should i see at this point or after resetting the board something else on left text area of MIOS studio or on LCD if I hook up it up? (LCD stays blank. Only backlight is on) Why if I get back to the ST-LINK utility and compare .hex vs memory I get: Error. 1st difference found @: 0x8004004 ? Looks to me that application is overwriting part of the bootloader. Still the bootloader seems to work? What is that 1 ignoreable error? Is there some kind of logfile that MIOS studio writes? Tried all above with GM5 driver also. Result are the same. Using Windows 7 ultimate 64bit.