/* $Id$ * $URL$ * * generic driver helper for GPO's * * Copyright (C) 2005 Michael Reinelt * Copyright (C) 2005 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * * exported variables: * * extern int GPIS, GPOS; number of Inputs and Outputs * * * these functions must be implemented by the real driver: * * int (*drv_generic_gpio_real_set) (const int num, const int val); * sets GPO num to val, returns the actual value * * int (*drv_generic_gpio_real_get) (const int num); * reads GPI num * * * exported fuctions: * * int drv_generic_gpio_init(const char *section, const char *driver) * initializes the generic GPIO driver * * int drv_generic_gpio_clear(void); * resets all GPO's * * int drv_generic_gpio_get (const int num) * returns value og GPI #num * * int drv_generic_gpio_draw(WIDGET * W) * 'draws' GPO widget * calls drv_generic_gpio_real_set() * * int drv_generic_gpio_quit(void) * closes the generic GPIO driver * */ #include "config.h" #include #include "debug.h" #include "plugin.h" #include "widget.h" #include "widget_gpo.h" #include "drv_generic_gpio.h" #ifdef WITH_DMALLOC #include #endif #define MAX_GPIS 32 #define MAX_GPOS 32 static char *Section = NULL; static char *Driver = NULL; static int GPI[MAX_GPIS]; static int GPO[MAX_GPOS]; int GPOS = 0; int GPIS = 0; int (*drv_generic_gpio_real_set) () = NULL; int (*drv_generic_gpio_real_get) () = NULL; static void drv_generic_gpio_plugin_gpi(RESULT * result, RESULT * arg1) { int num; double val; num = R2N(arg1); if (num <= 0 || num > GPIS) { error("%s::GPI(%d): GPI out of range (1..%d)", Driver, num, GPIS); SetResult(&result, R_STRING, ""); return; } val = drv_generic_gpio_get(num - 1); SetResult(&result, R_NUMBER, &val); } static void drv_generic_gpio_plugin_gpo(RESULT * result, const int argc, RESULT * argv[]) { int num, val; double gpo; switch (argc) { case 1: num = R2N(argv[0]); if (num <= 0 || num > GPOS) { error("%s::GPO(%d): GPO out of range (1..%d)", Driver, num, GPOS); SetResult(&result, R_STRING, ""); return; } gpo = GPO[num - 1]; SetResult(&result, R_NUMBER, &gpo); break; case 2: num = R2N(argv[0]); val = R2N(argv[1]); if (num <= 0 || num > GPOS) { error("%s::GPO(%d): GPO out of range (1..%d)", Driver, num, GPOS); SetResult(&result, R_STRING, ""); return; } if (GPO[num - 1] != val) { if (drv_generic_gpio_real_set) GPO[num - 1] = drv_generic_gpio_real_set(num - 1, val); } gpo = GPO[num - 1]; SetResult(&result, R_NUMBER, &gpo); break; default: error("%s::GPO(): wrong number of parameters", Driver); SetResult(&result, R_STRING, ""); } } int drv_generic_gpio_init(const char *section, const char *driver) { WIDGET_CLASS wc; Section = (char *) section; Driver = (char *) driver; info("%s: using %d GPI's and %d GPO's", Driver, GPIS, GPOS); /* reset all GPO's */ drv_generic_gpio_clear(); /* register gpo widget */ wc = Widget_GPO; wc.draw = drv_generic_gpio_draw; widget_register(&wc); /* register plugins */ AddFunction("LCD::GPI", 1, drv_generic_gpio_plugin_gpi); AddFunction("LCD::GPO", -1, drv_generic_gpio_plugin_gpo); return 0; } int drv_generic_gpio_clear(void) { int i; /* clear GPI buffer */ for (i = 0; i < MAX_GPIS; i++) { GPI[i] = 0; } /* clear GPO buffer */ for (i = 0; i < MAX_GPOS; i++) { GPO[i] = 0; } /* really clear GPO's */ for (i = 0; i < GPOS; i++) { if (drv_generic_gpio_real_set) GPO[i] = drv_generic_gpio_real_set(i, 0); } return 0; } int drv_generic_gpio_get(const int num) { int val = 0; if (num < 0 || num >= GPIS) { error("%s: gpio_get(%d): GPI out of range (0..%d)", Driver, num + 1, GPIS); return -1; } if (drv_generic_gpio_real_get) val = drv_generic_gpio_real_get(num); GPI[num] = val; return val; } int drv_generic_gpio_draw(WIDGET * W) { WIDGET_GPO *gpo = W->data; int num, val; num = W->row; val = P2N(&gpo->expression); if (num < 0 || num >= GPOS) { error("%s: gpio_draw(%d): GPO out of range (0..%d)", Driver, num + 1, GPOS); return -1; } if (GPO[num] != val) { if (drv_generic_gpio_real_set) GPO[num] = drv_generic_gpio_real_set(num, val); } return 0; } int drv_generic_gpio_quit(void) { info("%s: shutting down GPIO driver.", Driver); drv_generic_gpio_clear(); return 0; } n64'>64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172