Landfall

Annotated pkg/landfall-examples/letux400_keypad_physical/letux400_keypad_physical.c

254:a437381bd5f4
9 months ago Paul Boddie Employed get_channel to eliminate redundant code. cpm-library-improvements
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/*
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 * Display the physical keypad matrix layout for the Letux 400 notebook
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 * computer.
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 *
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 * Copyright (C) 2018, 2023 Paul Boddie <paul@boddie.org.uk>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License as
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 * published by the Free Software Foundation; either version 2 of
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 * the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
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 * Boston, MA  02110-1301, USA
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 */
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#include <l4/re/c/rm.h>
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#include <l4/re/c/util/cap_alloc.h>
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#include <l4/re/env.h>
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#include <l4/util/util.h>
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#include <l4/sys/ipc.h>
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#include <l4/re/c/util/video/goos_fb.h>
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#include <l4/re/c/video/view.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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enum Jz4730_keypad_gpio
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{
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  Jz4730_keypad_gpio_inputs_count = 8,
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  Jz4730_keypad_gpio_outputs_count = 17,
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};
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/* Video abstractions. */
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static l4re_util_video_goos_fb_t gfb;
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static l4re_video_view_info_t fbi;
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static void *fb;
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/* Keypad status and dimensions. */
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uint32_t *keypad = 0;
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void *keymem = 0;
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int columns = Jz4730_keypad_gpio_outputs_count, rows = Jz4730_keypad_gpio_inputs_count;
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/* Position units: 0.1mm */
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enum {
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  SPC = 600, CAPS = 240, TAB = 200, LSH = 184, M = 160, S = 136, XS = 120,
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  WIDTH = 2040, HEIGHT = 800, ROWS = 6,
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};
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/*
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S(15)                         Esc F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 Num Sys Ins Del
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XS(1)/M(12)                   `  1   2   3   4   5   6   7   8   9   0   -   Bsp
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TAB(1)/M(10)/XS(2)            Tab Q   W   E   R   T   Y   U   I   O   P   =  \
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CAPS(1)/M(9)/XS(1)/CAPS(1)    Caps A   S   D   F   G   H   J   K   L   ;   Enter
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LSH(1)/XS(1)/M(7)/XS(4)/S(1)  Sh \  Z   X   C   V   B   N   M   ,   .   /  Up Sh
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XS(5)/SPC(1)/XS(7)            Fn Ctr Zzz Alt Pau Space     Mnu [  ]  '  Lt Dn Rt
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*/
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enum {
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  SIZE_KEY_ESC = S, SIZE_KEY_F1 = S, SIZE_KEY_F2 = S, SIZE_KEY_F3 = S, SIZE_KEY_F4 = S,
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  SIZE_KEY_F5 = S, SIZE_KEY_F6 = S, SIZE_KEY_F7 = S, SIZE_KEY_F8 = S, SIZE_KEY_F9 = S,
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  SIZE_KEY_F10 = S, SIZE_KEY_NUMLOCK = S, SIZE_KEY_SYSRQ = S, SIZE_KEY_INSERT = S,
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  SIZE_KEY_DELETE = S,
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  SIZE_KEY_GRAVE = XS, SIZE_KEY_1 = M, SIZE_KEY_2 = M, SIZE_KEY_3 = M, SIZE_KEY_4 = M,
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  SIZE_KEY_5 = M, SIZE_KEY_6 = M, SIZE_KEY_7 = M, SIZE_KEY_8 = M, SIZE_KEY_9 = M,
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  SIZE_KEY_0 = M, SIZE_KEY_MINUS = M, SIZE_KEY_BACKSPACE = M,
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  SIZE_KEY_TAB = TAB, SIZE_KEY_Q = M, SIZE_KEY_W = M, SIZE_KEY_E = M, SIZE_KEY_R = M,
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  SIZE_KEY_T = M, SIZE_KEY_Y = M, SIZE_KEY_U = M, SIZE_KEY_I = M, SIZE_KEY_O = M,
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  SIZE_KEY_P = M, SIZE_KEY_EQUAL = XS, SIZE_KEY_RIGHTBACKSLASH = XS,
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  SIZE_KEY_CAPSLOCK = CAPS, SIZE_KEY_A = M, SIZE_KEY_S = M, SIZE_KEY_D = M, SIZE_KEY_F = M,
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  SIZE_KEY_G = M, SIZE_KEY_H = M, SIZE_KEY_J = M, SIZE_KEY_K = M, SIZE_KEY_L = M,
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  SIZE_KEY_SEMICOLON = XS, SIZE_KEY_ENTER = CAPS,
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  SIZE_KEY_LEFTSHIFT = LSH, SIZE_KEY_LEFTBACKSLASH = XS, SIZE_KEY_Z = M, SIZE_KEY_X = M, SIZE_KEY_C = M,
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  SIZE_KEY_V = M, SIZE_KEY_B = M, SIZE_KEY_N = M, SIZE_KEY_M = M, SIZE_KEY_COMMA = XS,
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  SIZE_KEY_DOT = XS, SIZE_KEY_SLASH = XS, SIZE_KEY_UP = XS, SIZE_KEY_RIGHTSHIFT = S,
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  SIZE_KEY_FN = XS, SIZE_KEY_LEFTCTRL = XS, SIZE_KEY_SLEEP = XS, SIZE_KEY_LEFTALT = XS, SIZE_KEY_PAUSE = XS,
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  SIZE_KEY_SPACE = SPC, SIZE_KEY_MENU = XS, SIZE_KEY_LEFTBRACE = XS, SIZE_KEY_RIGHTBRACE = XS,
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  SIZE_KEY_APOSTROPHE = XS, SIZE_KEY_LEFT = XS, SIZE_KEY_DOWN = XS, SIZE_KEY_RIGHT = XS,
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};
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enum {
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  XPOS_KEY_ESC = 0, XPOS_KEY_F1 = S, XPOS_KEY_F2 = 2*S, XPOS_KEY_F3 = 3*S, XPOS_KEY_F4 = 4*S,
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  XPOS_KEY_F5 = 5*S, XPOS_KEY_F6 = 6*S, XPOS_KEY_F7 = 7*S, XPOS_KEY_F8 = 8*S, XPOS_KEY_F9 = 9*S,
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  XPOS_KEY_F10 = 10*S, XPOS_KEY_NUMLOCK = 11*S, XPOS_KEY_SYSRQ = 12*S, XPOS_KEY_INSERT = 13*S,
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  XPOS_KEY_DELETE = 14*S,
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  XPOS_KEY_GRAVE = 0, XPOS_KEY_1 = XS, XPOS_KEY_2 = XS+M, XPOS_KEY_3 = XS+2*M, XPOS_KEY_4 = XS+3*M,
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  XPOS_KEY_5 = XS+4*M, XPOS_KEY_6 = XS+5*M, XPOS_KEY_7 = XS+6*M, XPOS_KEY_8 = XS+7*M, XPOS_KEY_9 = XS+8*M,
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  XPOS_KEY_0 = XS+9*M, XPOS_KEY_MINUS = XS+10*M, XPOS_KEY_BACKSPACE = XS+11*M,
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  XPOS_KEY_TAB = 0, XPOS_KEY_Q = TAB, XPOS_KEY_W = TAB+M, XPOS_KEY_E = TAB+2*M, XPOS_KEY_R = TAB+3*M,
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  XPOS_KEY_T = TAB+4*M, XPOS_KEY_Y = TAB+5*M, XPOS_KEY_U = TAB+6*M, XPOS_KEY_I = TAB+7*M, XPOS_KEY_O = TAB+8*M,
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  XPOS_KEY_P = TAB+9*M, XPOS_KEY_EQUAL = TAB+10*M, XPOS_KEY_RIGHTBACKSLASH = TAB+10*M+XS,
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  XPOS_KEY_CAPSLOCK = 0, XPOS_KEY_A = CAPS, XPOS_KEY_S = CAPS+M, XPOS_KEY_D = CAPS+2*M, XPOS_KEY_F = CAPS+3*M,
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  XPOS_KEY_G = CAPS+4*M, XPOS_KEY_H = CAPS+5*M, XPOS_KEY_J = CAPS+6*M, XPOS_KEY_K = CAPS+7*M, XPOS_KEY_L = CAPS+8*M,
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  XPOS_KEY_SEMICOLON = CAPS+9*M, XPOS_KEY_ENTER = CAPS+9*M+XS,
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  XPOS_KEY_LEFTSHIFT = 0, XPOS_KEY_LEFTBACKSLASH = LSH, XPOS_KEY_Z = LSH+XS, XPOS_KEY_X = LSH+XS+M, XPOS_KEY_C = LSH+XS+2*M,
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  XPOS_KEY_V = LSH+XS+3*M, XPOS_KEY_B = LSH+XS+4*M, XPOS_KEY_N = LSH+XS+5*M, XPOS_KEY_M = LSH+XS+6*M, XPOS_KEY_COMMA = LSH+XS+7*M,
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  XPOS_KEY_DOT = LSH+XS+7*M+XS, XPOS_KEY_SLASH = LSH+XS+7*M+2*XS, XPOS_KEY_UP = LSH+XS+7*M+3*XS, XPOS_KEY_RIGHTSHIFT = LSH+XS+7*M+4*XS,
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  XPOS_KEY_FN = 0, XPOS_KEY_LEFTCTRL = XS, XPOS_KEY_SLEEP = 2*XS, XPOS_KEY_LEFTALT = 3*XS, XPOS_KEY_PAUSE = 4*XS,
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  XPOS_KEY_SPACE = 5*XS, XPOS_KEY_MENU = 5*XS+SPC, XPOS_KEY_LEFTBRACE = 5*XS+SPC+XS, XPOS_KEY_RIGHTBRACE = 5*XS+SPC+2*XS,
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  XPOS_KEY_APOSTROPHE = 5*XS+SPC+3*XS, XPOS_KEY_LEFT = 5*XS+SPC+4*XS, XPOS_KEY_DOWN = 5*XS+SPC+5*XS, XPOS_KEY_RIGHT = 5*XS+SPC+6*XS,
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};
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enum {
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  YPOS_KEY_ESC = 0, YPOS_KEY_F1 = 0, YPOS_KEY_F2 = 0, YPOS_KEY_F3 = 0, YPOS_KEY_F4 = 0,
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  YPOS_KEY_F5 = 0, YPOS_KEY_F6 = 0, YPOS_KEY_F7 = 0, YPOS_KEY_F8 = 0, YPOS_KEY_F9 = 0,
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  YPOS_KEY_F10 = 0, YPOS_KEY_NUMLOCK = 0, YPOS_KEY_SYSRQ = 0, YPOS_KEY_INSERT = 0,
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  YPOS_KEY_DELETE = 0,
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  YPOS_KEY_GRAVE = 1, YPOS_KEY_1 = 1, YPOS_KEY_2 = 1, YPOS_KEY_3 = 1, YPOS_KEY_4 = 1,
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  YPOS_KEY_5 = 1, YPOS_KEY_6 = 1, YPOS_KEY_7 = 1, YPOS_KEY_8 = 1, YPOS_KEY_9 = 1,
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  YPOS_KEY_0 = 1, YPOS_KEY_MINUS = 1, YPOS_KEY_BACKSPACE = 1,
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  YPOS_KEY_TAB = 2, YPOS_KEY_Q = 2, YPOS_KEY_W = 2, YPOS_KEY_E = 2, YPOS_KEY_R = 2,
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  YPOS_KEY_T = 2, YPOS_KEY_Y = 2, YPOS_KEY_U = 2, YPOS_KEY_I = 2, YPOS_KEY_O = 2,
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  YPOS_KEY_P = 2, YPOS_KEY_EQUAL = 2, YPOS_KEY_RIGHTBACKSLASH = 2,
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  YPOS_KEY_CAPSLOCK = 3, YPOS_KEY_A = 3, YPOS_KEY_S = 3, YPOS_KEY_D = 3, YPOS_KEY_F = 3,
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  YPOS_KEY_G = 3, YPOS_KEY_H = 3, YPOS_KEY_J = 3, YPOS_KEY_K = 3, YPOS_KEY_L = 3,
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  YPOS_KEY_SEMICOLON = 3, YPOS_KEY_ENTER = 3,
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  YPOS_KEY_LEFTSHIFT = 4, YPOS_KEY_LEFTBACKSLASH = 4, YPOS_KEY_Z = 4, YPOS_KEY_X = 4, YPOS_KEY_C = 4,
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  YPOS_KEY_V = 4, YPOS_KEY_B = 4, YPOS_KEY_N = 4, YPOS_KEY_M = 4, YPOS_KEY_COMMA = 4,
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  YPOS_KEY_DOT = 4, YPOS_KEY_SLASH = 4, YPOS_KEY_UP = 4, YPOS_KEY_RIGHTSHIFT = 4,
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  YPOS_KEY_FN = 5, YPOS_KEY_LEFTCTRL = 5, YPOS_KEY_SLEEP = 5, YPOS_KEY_LEFTALT = 5, YPOS_KEY_PAUSE = 5,
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  YPOS_KEY_SPACE = 5, YPOS_KEY_MENU = 5, YPOS_KEY_LEFTBRACE = 5, YPOS_KEY_RIGHTBRACE = 5,
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  YPOS_KEY_APOSTROPHE = 5, YPOS_KEY_LEFT = 5, YPOS_KEY_DOWN = 5, YPOS_KEY_RIGHT = 5,
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};
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/* Keypad matrix mapping. */
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#define PHYS_KEY(X) {XPOS_KEY_##X, YPOS_KEY_##X, SIZE_KEY_##X}
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#define PHYS_NULL   {0, 0, 0}
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static const uint32_t keypos[Jz4730_keypad_gpio_inputs_count][Jz4730_keypad_gpio_outputs_count][3] = {
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{PHYS_KEY(PAUSE), PHYS_KEY(Q), PHYS_KEY(W), PHYS_KEY(E), PHYS_KEY(R), PHYS_KEY(U), PHYS_KEY(I), PHYS_KEY(O),
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 PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(P), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_NULL},
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{PHYS_NULL, PHYS_KEY(TAB), PHYS_KEY(CAPSLOCK), PHYS_KEY(F3), PHYS_KEY(T), PHYS_KEY(Y), PHYS_KEY(RIGHTBRACE), PHYS_KEY(F7),
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 PHYS_NULL, PHYS_KEY(BACKSPACE), PHYS_NULL, PHYS_KEY(LEFTBRACE), PHYS_KEY(SLEEP), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(LEFTSHIFT)},
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{PHYS_NULL, PHYS_KEY(A), PHYS_KEY(S), PHYS_KEY(D), PHYS_KEY(F), PHYS_KEY(J), PHYS_KEY(K), PHYS_KEY(L),
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 PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(SEMICOLON), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(UP), PHYS_KEY(RIGHTSHIFT)},
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{PHYS_NULL, PHYS_KEY(ESC), PHYS_KEY(LEFTBACKSLASH), PHYS_KEY(F4), PHYS_KEY(G), PHYS_KEY(H), PHYS_KEY(F6), PHYS_NULL,
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 PHYS_KEY(SPACE), PHYS_NULL, PHYS_KEY(LEFTALT), PHYS_KEY(APOSTROPHE), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(DOWN), PHYS_NULL},
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{PHYS_NULL, PHYS_KEY(Z), PHYS_KEY(X), PHYS_KEY(C), PHYS_KEY(V), PHYS_KEY(M), PHYS_KEY(COMMA), PHYS_KEY(DOT),
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 PHYS_KEY(NUMLOCK), PHYS_KEY(ENTER), PHYS_NULL, PHYS_KEY(RIGHTBACKSLASH), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(LEFT), PHYS_NULL},
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{PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(B), PHYS_KEY(N), PHYS_NULL, PHYS_KEY(MENU),
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 PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(SLASH), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(RIGHT), PHYS_NULL},
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{PHYS_KEY(LEFTCTRL), PHYS_KEY(GRAVE), PHYS_NULL, PHYS_NULL, PHYS_KEY(5), PHYS_KEY(6), PHYS_KEY(EQUAL), PHYS_KEY(F8),
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 PHYS_KEY(DELETE), PHYS_KEY(F9), PHYS_NULL, PHYS_KEY(MINUS), PHYS_NULL, PHYS_KEY(F2), PHYS_KEY(INSERT), PHYS_NULL, PHYS_KEY(F1)},
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{PHYS_KEY(F5), PHYS_KEY(1), PHYS_KEY(2), PHYS_KEY(3), PHYS_KEY(4), PHYS_KEY(7), PHYS_KEY(8), PHYS_KEY(9),
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 PHYS_NULL, PHYS_NULL, PHYS_KEY(SYSRQ), PHYS_KEY(0), PHYS_KEY(F10), PHYS_NULL, PHYS_NULL, PHYS_NULL, PHYS_KEY(FN)}
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};
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static uint32_t bitmask(uint32_t size)
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{
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  return (1 << size) - 1;
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}
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static uint32_t truncate_channel(uint32_t value, uint32_t size)
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{
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  return (value >> (8 - size)) & bitmask(size);
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}
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static void set_pixel(uint32_t pos, uint8_t bpp, uint32_t value)
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{
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  if (bpp <= 8) *(uint8_t *) pos = value;
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  else if (bpp <= 16) *(uint16_t *) pos = value;
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  else *(uint32_t *) pos = value;
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}
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/* Show the state of a key on the display. */
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static void fill_rectangle(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t rgb)
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{
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  uint8_t bpp = l4re_video_bits_per_pixel(&fbi.pixel_info);
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  uint8_t bytes_per_pixel = fbi.pixel_info.bytes_per_pixel;
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  uint32_t bytes_per_line = fbi.bytes_per_line;
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  uint32_t pos;
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  uint32_t col, row;
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  rgb = (truncate_channel(rgb >> 16, fbi.pixel_info.r.size) << fbi.pixel_info.r.shift) |
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        (truncate_channel(rgb >> 8, fbi.pixel_info.g.size) << fbi.pixel_info.g.shift) |
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        (truncate_channel(rgb, fbi.pixel_info.b.size) << fbi.pixel_info.b.shift);
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  for (row = 0; row < h; row++)
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  {
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    pos = (uint32_t) fb + (y + row) * bytes_per_line + x * bytes_per_pixel;
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    for (col = 0; col < w; col++)
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    {
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      set_pixel(pos, bpp, rgb);
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      pos += bytes_per_pixel;
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    }
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  }
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}
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/* Show the keypad status on the display. */
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static void show_keypad(void)
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{
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  uint32_t rowsize = fbi.height / ROWS, colsize;
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  uint8_t column, row;
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  uint32_t mask;
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  const uint32_t *pos;
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  for (column = 0; column < columns; column++)
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    for (row = 0, mask = 1 << (rows - 1);
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         row < rows;
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         row++, mask >>= 1)
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    {
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      /* Obtain the physical position. */
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      pos = keypos[row][column];
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      /* Obtain the width of the key. */
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      colsize = (pos[2] * fbi.width) / WIDTH;
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      /* Plot the rectangle for the key. */
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      fill_rectangle((pos[0] * fbi.width) / WIDTH, pos[1] * rowsize, colsize, rowsize,
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                     keypad[column] & mask ? 0xffffff : 0);
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    }
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  /* Refresh the display. */
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  l4re_util_video_goos_fb_refresh(&gfb, 0, 0, fbi.width, fbi.height);
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}
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int main(void)
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{
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  l4_cap_idx_t keypad_server;
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  l4re_ds_t mem;
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  l4_msgtag_t tag;
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  if (l4re_util_video_goos_fb_setup_name(&gfb, "fb"))
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    return 1;
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  if (l4re_util_video_goos_fb_view_info(&gfb, &fbi))
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    return 1;
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  if (!(fb = l4re_util_video_goos_fb_attach_buffer(&gfb)))
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    return 1;
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  /* Obtain a reference to the keypad. */
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  keypad_server = l4re_env_get_cap("keypad");
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  if (l4_is_invalid_cap(keypad_server)) return 1;
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  /* Obtain a capability for the keypad data. */
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  mem = l4re_util_cap_alloc();
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  if (l4_is_invalid_cap(mem)) return 1;
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  /* Obtain a reference to the keypad data. */
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  l4_utcb_br()->bdr = 0;
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  l4_utcb_br()->br[0] = L4_RCV_ITEM_SINGLE_CAP | mem;
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  tag = l4_ipc_call(keypad_server, l4_utcb(),
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                    l4_msgtag(0, 0, 0, 0), /* label zero, zero words, zero *sent* items */
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                    L4_IPC_NEVER);
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  if (l4_ipc_error(tag, l4_utcb())) return 1;
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  /* Attach the keypad data to a region in this task. */
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  if (l4re_rm_attach(&keymem, l4re_ds_size(mem), L4RE_RM_F_SEARCH_ADDR, mem, 0,
paul@0 304
                     L4_PAGESHIFT))
paul@0 305
    return 1;
paul@0 306
paul@0 307
  /* Show the keypad state. */
paul@0 308
paul@0 309
  keypad = (uint32_t *) keymem;
paul@0 310
paul@0 311
  while (1) show_keypad();
paul@0 312
paul@0 313
  return 0;
paul@0 314
}