keys.c
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00051 #include <compiler.h>
00052 #include <cfg/os.h>
00053
00054 #include <stdlib.h>
00055 #include <string.h>
00056 #include <sys/heap.h>
00057 #include <sys/event.h>
00058 #include <sys/timer.h>
00059 #include <sys/atom.h>
00060
00061 #include <dev/board.h>
00062
00063 #include <dev/gpio.h>
00064
00065 #include <sys/nutdebug.h>
00066
00067 #include <cfg/pca9555.h>
00068 #ifdef KEY_SUPPORT_IOEXP
00069 #include <dev/pca9555.h>
00070 #else
00071 #define IOXP_PORT0 0x80
00072 #endif
00073
00074
00075 #ifdef DEBUG_KEYS
00076 #include <stdio.h>
00077 #define KPRINTF(args,...) printf(args,##__VA_ARGS__)
00078 #else
00079 #define KPRINTF(args,...)
00080 #endif
00081
00082 #include <dev/keys.h>
00083
00088
00089 typedef struct {
00090 void* next;
00091 HANDLE* event;
00092 int bank;
00093 int pin;
00094 int lastState;
00095 int newState;
00096 int fx;
00097 uint32_t fxt;
00098 uint32_t TimeDown;
00099 } KEYEventT;
00100
00101 static KEYEventT *first_key;
00102
00103 HANDLE key_tmr = NULL;
00104 HANDLE key_evt = NULL;
00105
00119 int NutGetKeyState( HANDLE keyh)
00120 {
00121 KEYEventT *key = (KEYEventT *)keyh;
00122 int rc = (key->newState & KEY_PENDING);
00123 key->newState &= ~KEY_PENDING;
00124 return rc;
00125 }
00126
00137 uint32_t NutGetKeyTime( HANDLE keyh)
00138 {
00139 KEYEventT *key = (KEYEventT *)keyh;
00140 uint32_t now = NutGetMillis();
00141
00142 return (now - key->TimeDown);
00143 }
00144
00154 void KeyTimerCb(HANDLE timer, void *arg)
00155 {
00156 NutEventPostAsync(arg);
00157 }
00158
00165 THREAD( sys_key, arg)
00166 {
00167 KEYEventT *key;
00168 uint32_t now;
00169 #ifdef KEY_SUPPORT_IOEXP
00170 int ioxread, ioxstate;
00171 #endif
00172
00173 NUTASSERT( arg != NULL);
00174
00175 NutThreadSetPriority( 16);
00176 for(;;)
00177 {
00178 #ifdef KEY_SUPPORT_IOEXP
00179 ioxread = 0;
00180 #endif
00181 if( NutEventWait( arg, NUT_WAIT_INFINITE)==0) {
00182 key = first_key;
00183 now = NutGetMillis();
00184 while( key)
00185 {
00186
00187
00188
00189 key->newState &= ~KEY_IS_DOWN;
00190
00191 if( key->bank < IOXP_PORT0) {
00192
00193 key->newState |= (GpioPinGet( key->bank, key->pin))?0:1;
00194 }
00195 #ifdef KEY_SUPPORT_IOEXP
00196 else {
00197
00198
00199
00200 if( ioxread == 0) {
00201 IOExpRawRead( key->bank, &ioxstate);
00202 ioxread = 1;
00203 }
00204
00205 key->newState |= ((ioxstate & (1<<key->pin))?0:1);
00206 }
00207 #endif
00208
00209
00210
00211
00212 if( (key->newState & KEY_IS_DOWN) > (key->lastState & KEY_IS_DOWN)) {
00213
00214 key->TimeDown = now;
00215 if( key->fx == KEY_ACTION_DOWN) {
00216 KPRINTF("KD %08lx E:%08lx\n", (uint32_t)key, (uint32_t)(key->event));
00217 key->newState |= KEY_PENDING;
00218 if( key->event) NutEventPost( key->event);
00219 }
00220 }
00221 else if( (key->newState & KEY_IS_DOWN) < (key->lastState & KEY_IS_DOWN)) {
00222
00223 key->newState &= ~KEY_IS_LOCKED;
00224 if( key->fx == KEY_ACTION_UP) {
00225 KPRINTF("KU %08lx E:%08lx\n", (uint32_t)key, (uint32_t)(key->event));
00226 key->newState |= (KEY_ACTION_UP | KEY_PENDING);
00227 if( key->event) NutEventPost( key->event);
00228 }
00229 else if( ( key->fx == KEY_ACTION_SHORT) && ( (now - key->TimeDown) < key->fxt)) {
00230 KPRINTF("KS %08lx E:%08lx\n", (uint32_t)key, (uint32_t)(key->event));
00231 key->newState |= (KEY_ACTION_SHORT | KEY_PENDING);
00232 if( key->event) NutEventPost( key->event);
00233 }
00234 }
00235 else if( (key->newState & KEY_IS_DOWN) && (key->fx==KEY_ACTION_HOLD)) {
00236
00237 if( ((now - key->TimeDown) > key->fxt) && ((key->newState & KEY_IS_LOCKED) == 0)) {
00238 KPRINTF("KH %08lx E:%08lx\n", (uint32_t)key, (uint32_t)(key->event));
00239 key->newState |= (KEY_ACTION_HOLD | KEY_PENDING);
00240 if( key->event) NutEventPost( key->event);
00241 key->newState |= KEY_IS_LOCKED;
00242 }
00243 }
00244
00245
00246 key->lastState = key->newState;
00247
00248 key = key->next;
00249 }
00250 }
00251 }
00252 }
00253
00261 int InitKEY( KEYEventT *key )
00262 {
00263 if( key->bank < IOXP_PORT0) {
00264
00265 GpioPinConfigSet( key->bank, key->pin, GPIO_CFG_PULLUP|GPIO_CFG_DEBOUNCE);
00266 return 0;
00267 }
00268 #ifdef KEY_SUPPORT_IOEXP
00269 else {
00270
00271 IOExpPinConfigSet( key->bank, key->pin, GPIO_CFG_PULLUP);
00272 return 0;
00273 }
00274 #endif
00275 return -1;
00276 }
00277
00299 int NutRegisterKey( HANDLE *keyhp, HANDLE *event, int bank, int pin, int fx, uint32_t fxt)
00300 {
00301 KEYEventT *key;
00302
00303 NUTASSERT( keyhp!=NULL);
00304
00305
00306 key = malloc( sizeof(KEYEventT));
00307 *keyhp = (void*)key;
00308
00309 if( key == NULL) {
00310 return -1;
00311 }
00312
00313
00314 key->bank = bank;
00315 key->pin = pin;
00316 key->fx = fx;
00317 key->fxt = fxt;
00318 key->event = event;
00319 NUTASSERT( event != NULL);
00320 key->lastState = key->newState = 1;
00321 key->TimeDown = 0;
00322
00323
00324 InitKEY( key);
00325
00326
00327 NutEnterCritical();
00328 if( first_key == NULL) {
00329
00330 first_key = key;
00331 }
00332 else {
00333 key->next = first_key;
00334 first_key = key;
00335 }
00336 NutExitCritical();
00337
00338 if( key_tmr == NULL) {
00339 NutThreadCreate( "sys_key", sys_key, &key_evt, 192);
00340 key_tmr = NutTimerStart(10, KeyTimerCb, &key_evt, 0);
00341 }
00342
00343 KPRINTF("KREG %08lx E:%08lx\n", (uint32_t)key, (uint32_t)(key->event));
00344
00345 return 0;
00346 }
00347