> On 29.12.2016 23:16, Maarten Brock wrote:
>>
>> These values get you a 453 baudrate:
>> 24.5MHz / 8 / (256-45) / 32 = 453
>>
>> 300 baud is really low and impossible to achieve with T1 in 8-bit
>> autoreload. Most USB-UARTs even have this as their lower level limit.
>
>
>
> The 43 in the posted e
On 29.12.2016 23:16, Maarten Brock wrote:
>
> These values get you a 453 baudrate:
> 24.5MHz / 8 / (256-45) / 32 = 453
>
> 300 baud is really low and impossible to achieve with T1 in 8-bit
> autoreload. Most USB-UARTs even have this as their lower level limit.
The 43 in the posted example was
> While LED blinking and timer interrupts re working now, I wasn't able to
> get serial I/O to work yet. I only see garbage (all received bytes are
> either 0x00 or 0x80).
> I tried to port my "Hello, world!" that I already got working for many
> other mcs51 variants:
>
> #include
>
> #include
>
It seems the tolerances in baudrate variation are quite low in the board
/ serial converter combination used. I wasn't able to get the UART
working at the default SYSCLK, not even at 300 baud (1.54% deviation in
baudrate). Using a 24.5 Mhz SYSCLK, it works fine at 300 baud (0.15%
deviation in baudr
While LED blinking and timer interrupts re working now, I wasn't able to
get serial I/O to work yet. I only see garbage (all received bytes are
either 0x00 or 0x80).
I tried to port my "Hello, world!" that I already got working for many
other mcs51 variants:
#include
#include
int putchar(int c
On 27.12.2016 11:49, Maarten Brock wrote:
>> On 26.12.2016 22:20, Maarten Brock wrote:
>>> Further, if you don't use our c8051f120.h> you will have to define
>>> _XPAGE yourself to let the xdata initialization succeed in the future.
>>
>> Shouldn't the default from crtpagessfr do, since the C8051F1
> On 26.12.2016 22:20, Maarten Brock wrote:
>> Further, if you don't use our c8051f120.h> you will have to define
>> _XPAGE yourself to let the xdata initialization succeed in the future.
>
> Shouldn't the default from crtpagessfr do, since the C8051F120 has
> _XPAGE at 0xa2?
>
> Philipp
Are you u
On 26.12.2016 22:20, Maarten Brock wrote:
> Further, if you don't use our c8051f120.h> you will have to define _XPAGE
> yourself to let the xdata initialization succeed in the future.
Shouldn't the default from crtpagessfr do, since the C8051F120 has
_XPAGE at 0xa2?
Philipp
On 26.12.2016 22:20, Maarten Brock wrote:
> Hi Philipp,
>
> On what SFRPAGE are P3MDOUT and XBR2 located? Is that also the default?
Thanks. The non-default sfr page was the problem.
Philipp
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Hi Philipp,
On what SFRPAGE are P3MDOUT and XBR2 located? Is that also the default?
Further, if you don't use our c8051f120.h> you will have to define _XPAGE
yourself to let the xdata initialization succeed in the future.
Maarten
> To look into SDCC mcs51 performance, I wanted to run Whetstone,
On 26.12.2016 14:54, Philipp Klaus Krause wrote:
> The same cables and U-EC6 debug adapter clone work fine with the
> C8051F020 board.
>
> Philipp
To flash the C8051F120 I use ec2writeflash --port USB, just like with
the C8051F020 board.
ec2writeflash recognizes the C8051F120 as C8051F120.
Phili
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