Standard printf with redirect instead of custom printf

[vidavidorra]

Background info

Currently the custom Uart1_printf function is used which requires the following includes:

# include <stdio.h>           // For vsprintf() in Uartx_printf()
# include <stdarg.h>          // For Uartx_printf()
# include <string.h>          // For memset()

This results in a rather large increasement in the amount of bytes used in the program register (25% to 44% on 60663 bytes of programming memory). Using the standard printf function reduces this according to the functionality used. For example when only using printing a string without formatting, it goes from 25% to 26%, and when using formatting it goes to about 30%. So this is quite a difference that is very welcome.

Steps

• [x] Find out usages of stderr and alike streams;
• [ ] Put the current Uart1_NNN functions inside a #if 0 equally block;
• [ ] Replace all the calls to Uart1_printf with calls to printf idem for putc and puts;
• [ ] For assert and debug see if it should use the same stream as the standard output or whether a different stream could be used and implement those features accordingly;
• [ ] Check whether it is possible to use one of the printf, puts or putc for the functions Uart1_putNum and Uart1_putBits and implement those features. Otherwise rewrite the putNum and putBits functions to drop the Uart1_ prefixes and use putc for printing inside those functions;
• [ ] Check whether tghe gets-family functions could be used instead of Uar1_gets and change those features accordingly.

[vidavidorra]

Step 1

Both the stdout and stderr streams redirect their messages to the UART1.

Remaining steps

After some testing in the code I found out that using printf drastically increases the size if implemented a lot. For example 57% with all Uart1_printf calls replaced by printf calls compared to 48% when using Uar1_printf... So for now I will be sticking with the uart printf!

Steps taken

I've created defines for uprintf, uputc, uputs, uputnum and uputbits macros which are currently redirected to the Uart1_ equivalents. From now on those functions should always be used for printing. That allows a easy change of stream.