Dne četrtek, 13. september 2018 ob 17:35:32 CEST je Arjan van Vught napisal(a): > Op donderdag 13 september 2018 16:35:22 UTC+2 schreef Jernej Skrabec: > > Dne sreda, 12. september 2018 ob 18:16:45 CEST je [email protected] > > <javascript:> > > > > napisal(a): > > > I am experiencing issues with Allwinner H3's UART. Trying to use it @ > > > 250000 bps, but unable to established reliable communication. It works > > > > fine > > > > > up to 150000 bps, but above this speed no proper communication. I tried > > > Armbian with 4.14.65 and 4.13 Linux kernels. > > > > Currently, with 24 MHz clock parent, 1.5 Mbps is the highest possible rate > > (24 > > MHz / 16 / x, where x is integer number). Theoretically, it is possible to > > change clock parent but I'm not sure anyone actually tried that. Such > > change > > would also affect I2C IIRC. > > > > Best regards, > > Jernej > > > > > > With baudrate = 24000000 / 16 / x = 250000, then x = 6 (UART_DLH=6, > > UART_DLL=0) > So with the F_24M the requested 250000 is doable. No need to change clock > parent.
Sorry, I misread. I though 2.5 Mbps is needed. Best regards, Jernej > > - Arjan -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
