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Finally somebody discovered the STM32F4 Discovery adaptions... :wink: Yes, I used this evaluation board to check if it's worth to spend some more time for a proper MBHP integration. Please don't expect a public release this year, because in order to do it right many hardware related topics have to be considered; especially some hardware conflicts have to be solved (more about this topic below). Currently I don't have so much time to continue with this due to various business trips around the world. I will probably continue in September. On the other hand, hackers with some background knowledge would already be able to use this board for own experiments with MIOS32. For a kickstart: here the precompiled bootloader <removed> New page: http://www.ucapps.de/mbhp_core_stm32f4.html What is working so far: - system init, timers, interrupts, FreeRTOS, etc. - accessing the onboard LEDs - USB MIDI and UART based MIDI - code upload via MIOS Studio - I2S (@Niklasni: yes, even the onboard DAC is running, I tested it with apps/tutorials/024_i2s_synth) - SD Card access (but with common SPI) - SRIO - IIC (accessing the MBHP_IIC_MIDI module) What is not implemented yet: - ADC (because I haven't started with the adaption yet) - LCD (low prio, have to find some free pins which are not used for other purposes) - SW based SPI for J19 (have to find free pins, or maybe I will use a HW SPI for this..) and that's all ;-) Applications which are already running without issues (aside from the missing ADC, LCD and J19 support): - MIDIbox SEQ V4 - MIDIbox NG V1 - MIDIO128 V3 - MIDIbox CV V2 so - no real show stopper. But the hardware connectivity will be a challenge, because unfortunately some important pins - especially for UARTs - are allocated by onboard resources. E.g. although the chip contains 6 UARTs, many of them can't be used bidirectionally due to these conflicts. I don't understand, why ST doesn't integrate some more internal multiplexers for alternative connections... In other words: the usage of this board will have some limitations. The main advantage that I see: not only higher speed, but especially much more RAM! 192k instead of 64k (LPC1769, STM32F1) makes a big difference. I'm especially happy that MIOS32 applications like MBNG and MBSEQ can be easily upgraded with an inexpensive core module replacement in future! The onboard DAC and Cortex-M4 based DSP capabilities are also great for synths or Fx units of course, but I'm unsure if I will go into this direction by myself. Best Regards, Thorsten.