add types.h to Makefile

fix typo, add types.h to Makefile

put shared types in 'types.h' (#40) ...

* put shared types in 'types.h'

More optimizations (#39) ...

* use 'typedef uint8_t code_t' for char codes instead of uint16_t
* use 'typedef uint8_t height_t' for bitmap height instead of uint16_t, same for width, row, col
* optimize writing strings to and reading strings from SRAM (not used)
* delay initial display update after power on (not necessary but avoids two consecutive display updates when connecting the programmer (display update starts almost immediately after power on and restarts when programmer resets after ~1 second))

Let watchdog wake up MCU only every 8 instead of 1 seconds, saving some power (#38) ...

- set watchdog to bark every 8 seconds
- counter can now be 8 instead of 16 bit - ATOMIC_BLOCK not needed
- adjust constant and variable names
- saves about 4uA in average power consumption

avoid frequent, expensive divisions (#37)

compile with -O2 instead of -Os as this seems to save a few microamps

remove unnecessary delays in display initialization (#36) ...

- no need to wait 10ms since VCI already supplied, display is in deep sleep mode
- no need to wait 100ms after hardware eset (waiting for busy) before software reset

=> might contribute to a tiny reduction of power consumption

update project ...

- use self-hosted runner with avr-gcc 13.2.0

update project ...

- set --param=min-pagesize=0
- ugly hack in project configuration to avoid issues in code assistance with __flash qualifier

update project ...

- set --param=min-pagesize=0
- ugly hack in project configuration to avoid issues in code assistance with __flash qualifier

Merge pull request #33 from gitdode/makefile ...

Problems with Makefile

add dependency on .h files and Makefile

replace '-Wl,--relax' with '-mrelax' in Makefile

Update README.md

use binary instead of linear search (#30) ...

use binary instead of linear search using algorithm from https://en.wikipedia.org/wiki/Binary_search_algorithm

Use flash addresses like "const __flash Font*" instead of passing (#29) ...

around objects like "Font" that live in program memory.  Local copies
in static storage or on the stack are no more needed.  Apart from that,
removing requirement for pgm_read_xxx adds type-safety to variables that
hold such pointers.

Compiles without warning with avr-gcc v8 when -Waddr-space-convert is active.
Slight decrese in code size.  Some comments might be out of sync.

Qualifier "__flash" requires GNU-C99 or higher and avr-gcc v4.7 or
newer.  avr-gcc v4.7 was released in 2012.

Notice that pgm_read_xxx(), memcpy_P etc. can still be used with
flash addresses.

Co-authored-by: me <me@home>

build with gcc 13 and avr-libc 2.1 (#26) ...

- set --param=min-pagesize=0 to fix false warning "array subscript [0] is outside array bounds"
  (not for now to allow building also with avr-gcc 10)
- adjust 'size' target

add drillholes to frame (#27)

keep ground plane away from mounting holes (#25)

improve French translation

add manual in English and French

add ISP header pin layout to manual

disable SPI between display updates, fix schematic ...

- fix high power consumption of display in sleep mode by disabling SPI (driving SCK low)
- remove "unconnected" from MCU pin 20 (AREF) as it is connected
- update README and manual

disable SPI between display updates, fix schematic (#24) ...

- fix high power consumption of display in sleep mode by disabling SPI (driving SCK low)
- remove "unconnected" from MCU pin 20 (AREF) as it is connected
- update README and manual

update manual

update README and manual

update README, comment on modulo, add manual (German)

read from SRAM in sequential mode when writing to display

read from SRAM in sequential mode when writing to display (#23)