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Subject: Re: Trimming the lcd api

Re: Trimming the lcd api

From: Marcin Bukat <>
Date: Wed, 12 Oct 2011 12:20:04 +0200

2011/10/12 Thomas Martitz <>:
> Am 11.10.2011 21:22, schrieb Björn Stenberg:
>> I would like to condense all of our puts variants into one single
>> function:
>>  void lcd_puts(int x, int y, int xcrop, int style,
>>                bool scrolled, const char* fmt, ...)
> I agree this number of wrappers is excessive, and a smaller API (and pixel
> based with scrolling, finally) would be great. But perhaps keep 1 or 2 of
> the most simple wrappers (if they're also the most common one) as calling
> functions with a large number of parameters does have a binsize impact (and
> there's a large number of callers). Not to mention the inconvinience for the
> most simple cases.
> Perhaps
> void lcd_puts(int x, int y, const char* text);
> void lcd_putsf(int x, int y, const char* fmt, ...);
> void lcd_putsf_ex(int x, int y, int xcrop, int style, bool scrolled, const
> char* fmt, ...);
> ?
> Best regards.

It is worh noting that on arm-eabi r0-r3 are used to pass arguments to
called function. Above 4 args things are passed through the stack.
Received on 2011-10-12

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