Re: [Sdcc-user] STC8A8K64S4A12 UART?

[Eric R. <e.r...@ds...>]

Just a wild guess after browsing the manual: the UART pins can be selected
via S1_S[1:0] in P_SW1, and this setting does not seem to have a default?

 Eric


> -----Original Message-----
> From: Philipp Klaus Krause [mailto:pk...@sp...] 
> Sent: zondag 7 juni 2020 16:01
> To: Sdcc-User
> Subject: [Sdcc-user] STC8A8K64S4A12 UART?
> 
> I'm trying to get a simple "Hello world" running on a 
> STC8A8K64S4A12 Development Board.
> However, so far, I've gotten nowhere.
> 
> I see no activity on the serial lines (the board has LEDs 
> attached to P3.o and P3.2, the RxD and TxD pins, so if there 
> was any activity, I should at least see the LEDs flickering, 
> but I see nothing.
> 
> I've tried both the sample code in section 14.7.3 of the 
> datasheet, and my own code from other STC devices 
> (http://www.colecovision.eu/mcs51/STC89%20DEMO%20BOARD%20Seria
> l.shtml).
> 
> Even if I haven't gotten the speed right yet (both code 
> samples are actually for 11.0592 MhZ system clock) I should 
> at least see the LEDs flicker (like they do when writing 
> using stcgal).
> 
> Philipp
> 
> 
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