ok about the d-pad
iv been looking around for off the shelf tactile key caps. so atm there all seperate caps not one big cross conection.
reason why we dont want to use the cross dpad is that the buton assambly is biger then the hole unit almoust and involes custom parts

other ways to make it smaller is using silecone pads (used on xbox,playstation and nintendo devices) but at our curent volume its not realy posible to get molds for those

so we are curently looking at caps like these for both dpad and action butons

wel here is a concept render (not fully acurate, like the wifi will be on the botem but its mainly to show that the true hole parts cant interfear with that bourd)

the pixel comand is in there and used by some of my code, so you can use it
i think you can also acces the hole buffer if you want, not sure how thoug ( you prefer a getpixel or specific regions?)

curently looking into triangles and stumbled upon u8glibs convex polygon drawing.
i cant realy figure out how it works but it might me nice to have
this is in c++ and we need it in c. im not the best translater and not fully understanding whats going on makes it even harder
/*

  u8g_polygon.c

  Implementation of a polygon draw algorithm for "convex" polygons.

  Universal 8bit Graphics Library
 
  Copyright (c) 2013, [email protected]
  All rights reserved.

  Redistribution and use in source and binary forms, with or without modification,
  are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice, this list
    of conditions and the following disclaimer.
   
  * Redistributions in binary form must reproduce the above copyright notice, this
    list of conditions and the following disclaimer in the documentation and/or other
    materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

  See also:
  http://www.angelfire.com/linux/myp/ConvexPolRas/ConvexPolRas.html
  Computer Graphics, Principles and Practice, Foley, van Dam, Feiner, Hughes (pp 92)
  Michael Abrash's Graphics Programming Black Book, Special Edition (Chapter 38 and 39)

  Optimized for embedded systems
  - static memory usage only
  - consistent data types
  - low flash ROM consumption
 
*/


#include "u8g.h"




/*===========================================*/
/* procedures, which should not be inlined (save as much flash ROM as possible */

static uint8_t pge_Next(struct pg_edge_struct *pge) PG_NOINLINE;
static uint8_t pg_inc(pg_struct *pg, uint8_t i) PG_NOINLINE;
static uint8_t pg_dec(pg_struct *pg, uint8_t i) PG_NOINLINE;
static void pg_expand_min_y(pg_struct *pg, pg_word_t min_y, uint8_t pge_idx) PG_NOINLINE;
static void pg_line_init(pg_struct * const pg, uint8_t pge_index) PG_NOINLINE;

/*===========================================*/
/* line draw algorithm */

static uint8_t pge_Next(struct pg_edge_struct *pge)
{
  if ( pge->current_y >= pge->max_y )
    return 0;
 
  pge->current_x += pge->current_x_offset;
  pge->error += pge->error_offset;
  if ( pge->error > 0 )
  {
    pge->current_x += pge->x_direction;
    pge->error -= pge->height;
  } 
 
  pge->current_y++;
  return 1;
}

/* assumes y2 > y1 */
static void pge_Init(struct pg_edge_struct *pge, pg_word_t x1, pg_word_t y1, pg_word_t x2, pg_word_t y2)
{
  pg_word_t dx = x2 - x1;
  pg_word_t width;

  pge->height = y2 - y1;
  pge->max_y = y2;
  pge->current_y = y1;
  pge->current_x = x1;

  if ( dx >= 0 )
  {
    pge->x_direction = 1;
    width = dx;
    pge->error = 0;
  }
  else
  {
    pge->x_direction = -1;
    width = -dx;
    pge->error = 1 - pge->height;
  }
 
  pge->current_x_offset = dx / pge->height;
  pge->error_offset = width % pge->height;
}

/*===========================================*/
/* convex polygon algorithm */

static uint8_t pg_inc(pg_struct *pg, uint8_t i)
{
    i++;
    if ( i >= pg->cnt )
      i = 0;
    return i;
}

static uint8_t pg_dec(pg_struct *pg, uint8_t i)
{
    i--;
    if ( i >= pg->cnt )
      i = pg->cnt-1;
    return i;
}

static void pg_expand_min_y(pg_struct *pg, pg_word_t min_y, uint8_t pge_idx)
{
  uint8_t i = pg->pge[pge_idx].curr_idx;
  for(;;)
  {
    i = pg->pge[pge_idx].next_idx_fn(pg, i);
    if ( pg->list[i].y != min_y )
      break;
    pg->pge[pge_idx].curr_idx = i;
  }
}

static uint8_t pg_prepare(pg_struct *pg)
{
  pg_word_t max_y;
  pg_word_t min_y;
  uint8_t i;

  /* setup the next index procedures */
  pg->pge[PG_RIGHT].next_idx_fn = pg_inc;
  pg->pge[PG_LEFT].next_idx_fn = pg_dec;
 
  /* search for highest and lowest point */
  max_y = pg->list[0].y;
  min_y = pg->list[0].y;
  pg->pge[PG_LEFT].curr_idx = 0;
  for( i = 1; i < pg->cnt; i++ )
  {
    if ( max_y < pg->list[i].y )
    {
      max_y = pg->list[i].y;
    }
    if ( min_y > pg->list[i].y )
    {
      pg->pge[PG_LEFT].curr_idx = i;
      min_y = pg->list[i].y;
    }
  }

  /* calculate total number of scan lines */
  pg->total_scan_line_cnt = max_y;
  pg->total_scan_line_cnt -= min_y;
 
  /* exit if polygon height is zero */
  if ( pg->total_scan_line_cnt == 0 )
    return 0;
 
  /* if the minimum y side is flat, try to find the lowest and highest x points */
  pg->pge[PG_RIGHT].curr_idx = pg->pge[PG_LEFT].curr_idx; 
  pg_expand_min_y(pg, min_y, PG_RIGHT);
  pg_expand_min_y(pg, min_y, PG_LEFT);
 
  /* check if the min side is really flat (depends on the x values) */
  pg->is_min_y_not_flat = 1;
  if ( pg->list[pg->pge[PG_LEFT].curr_idx].x != pg->list[pg->pge[PG_RIGHT].curr_idx].x )
  {
    pg->is_min_y_not_flat = 0;
  }
  else
  {
    pg->total_scan_line_cnt--;
    if ( pg->total_scan_line_cnt == 0 )
      return 0;
  }

  return 1;
}

static void pg_hline(pg_struct *pg, u8g_t *u8g)
{
  pg_word_t x1, x2, y;
  x1 = pg->pge[PG_LEFT].current_x;
  x2 = pg->pge[PG_RIGHT].current_x;
  y = pg->pge[PG_RIGHT].current_y;
 
  if ( y < 0 )
    return;
  if ( y >= u8g_GetHeight(u8g) )
    return;
  if ( x1 < x2 )
  {
    if ( x2 < 0 )
      return;
    if ( x1 >= u8g_GetWidth(u8g) )
      return;
    if ( x1 < 0 )
      x1 = 0;
    if ( x2 >= u8g_GetWidth(u8g) )
      x2 = u8g_GetWidth(u8g);
    u8g_DrawHLine(u8g, x1, y, x2 - x1);
  }
  else
  {
    if ( x1 < 0 )
      return;
    if ( x2 >= u8g_GetWidth(u8g) )
      return;
    if ( x2 < 0 )
      x1 = 0;
    if ( x1 >= u8g_GetWidth(u8g) )
      x1 = u8g_GetWidth(u8g);
    u8g_DrawHLine(u8g, x2, y, x1 - x2);
  }
}

static void pg_line_init(pg_struct * pg, uint8_t pge_index)
{
  struct pg_edge_struct  *pge = pg->pge+pge_index;
  uint8_t idx; 
  pg_word_t x1;
  pg_word_t y1;
  pg_word_t x2;
  pg_word_t y2;

  idx = pge->curr_idx; 
  y1 = pg->list[idx].y;
  x1 = pg->list[idx].x;
  idx = pge->next_idx_fn(pg, idx);
  y2 = pg->list[idx].y;
  x2 = pg->list[idx].x;
  pge->curr_idx = idx;
 
  pge_Init(pge, x1, y1, x2, y2);
}

static void pg_exec(pg_struct *pg, u8g_t *u8g)
{
  pg_word_t i = pg->total_scan_line_cnt;

  /* first line is skipped if the min y line is not flat */
  pg_line_init(pg, PG_LEFT);
  pg_line_init(pg, PG_RIGHT);
 
  if ( pg->is_min_y_not_flat != 0 )
  {
    pge_Next(&(pg->pge[PG_LEFT]));
    pge_Next(&(pg->pge[PG_RIGHT]));
  }

  do
  {
    pg_hline(pg, u8g);
    while ( pge_Next(&(pg->pge[PG_LEFT])) == 0 )
    {
      pg_line_init(pg, PG_LEFT);
    }
    while ( pge_Next(&(pg->pge[PG_RIGHT])) == 0 )
    {
      pg_line_init(pg, PG_RIGHT);
    }
    i--;
  } while( i > 0 );
}

/*===========================================*/
/* API procedures */

void pg_ClearPolygonXY(pg_struct *pg)
{
  pg->cnt = 0;
}

void pg_AddPolygonXY(pg_struct *pg, u8g_t *u8g, int16_t x, int16_t y)
{
  if ( pg->cnt < PG_MAX_POINTS )
  {
    pg->list[pg->cnt].x = x;
    pg->list[pg->cnt].y = y;
    pg->cnt++;
  }
}

void pg_DrawPolygon(pg_struct *pg, u8g_t *u8g)
{
  if ( pg_prepare(pg) == 0 )
    return;
  pg_exec(pg, u8g);
}

pg_struct u8g_pg;

void u8g_ClearPolygonXY(void)
{
  pg_ClearPolygonXY(&u8g_pg);
}

void u8g_AddPolygonXY(u8g_t *u8g, int16_t x, int16_t y)
{
  pg_AddPolygonXY(&u8g_pg, u8g, x, y);
}

void u8g_DrawPolygon(u8g_t *u8g)
{
  pg_DrawPolygon(&u8g_pg, u8g);
}

void u8g_DrawTriangle(u8g_t *u8g, int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2)
{
  u8g_ClearPolygonXY();
  u8g_AddPolygonXY(u8g, x0, y0);
  u8g_AddPolygonXY(u8g, x1, y1);
  u8g_AddPolygonXY(u8g, x2, y2);
  u8g_DrawPolygon(u8g);
}



-----------

oh and we got circles filled circles and lines linetriangle in the code and working

Edit (Streetwalrus): merged double post.

hi guys just want to mention im doing the alpha branch on arduino, its more for proof of concept for the display buffer and all that
curently looking into realtime interpreters (been playing around with basic, but havent been able to display and run it at the same time)
any ideas for this are welcome

heres the working display buffer with a sprite and a background that sets random pixels in random colors

i hope people dont mind the 3D prints, the plastic i use is PLA and probebly only limited colors

yea i see where your coming from but then again it probebly more trust weurthy to get a profesional company on bourd for that
dealing with multiple indipendants and probebly sending to the costumer derectly cant guarantee that the product works and is made to spec, and we will only get the blame from that

the idea of making a kits and supplieng resellers like that might be a way to go, but for the current version we arent making it opensource hardware (mainly for copycat reasons)

il keep that in mind.
i was wondering if any of you people know any european pick and place fabs. im just mainly looking to get some price's since atm we plan to do it by hand (for 50 ish units that be fine but more it becoms like a big problem to do by hand)

thank you guys for your intrest aswel
we have spend about 400 euro's on prototyping parts at the moment

hi guys im the other guy who is making this thing, just a litle update on the hardware prototypes we are doing, we got almoust all parts together apart from the main m0+ part
we could not get out hands on any devboard for it so we tryed (and failed) doing our own breakout ones, curently we are going with the alternative wich is a socket.

atm im unsure about the licencing for the software/hardware
best option is to get pickt up by a company to be frank, since that will alow cheaper devices
ofcource that sound very unlikely so most probebly we do some crowd funding to get a batch made

i read on here someone asking about why not get a bigger better chip? wel we can sure fo for the m3 or m4 but then again u can go biger and biger until your at that the flagship smartphones
also we are still very new to this and starting with a gen 1 ish device, need to start somewhere and the m0+ seems a nice upgrade from the old avr arduino stuff