Hi I relayed this question to #ELL-i IRC channel on the Freenode network and was given a good link to things the software synth winner used as a starting point with the F4 Discovery: http://vedder.se/2012/07/play-mp3-on-the-stm32f4-discovery/ Then there’s the usual "is everything properly connected" mantra. Are you working on it at home or with Ivan, ie. do you have access to a logic analyzer? - t On 1.6.2014, at 16:25, jigsaw <jigsaw@xxxxxxxxx> wrote: > Hi, > > I first tried to load elli/Runtime/stm32/tests/test_Serial_write_uint8 to > ell-i, but nothing is received in minicom or screen. Then I tried to manually > initialize RCC and USART ( I tried both USART1 and USART2), but still failed. > > > I'm now trying to port the debugger to ell-i, but without working serial I > can't make it. > > Could anyone give a hand? Has anyone got serial working on ell-i with minicom > or any other common terminal? > > thx & > rgds, > -Qinglai