1 | /*--------------------------------------------------------------------------------- |
---|
2 | Touch screen control for the ARM7 |
---|
3 | |
---|
4 | Copyright (C) 2005 |
---|
5 | Michael Noland (joat) |
---|
6 | Jason Rogers (dovoto) |
---|
7 | Dave Murphy (WinterMute) |
---|
8 | |
---|
9 | This software is provided 'as-is', without any express or implied |
---|
10 | warranty. In no event will the authors be held liable for any |
---|
11 | damages arising from the use of this software. |
---|
12 | |
---|
13 | Permission is granted to anyone to use this software for any |
---|
14 | purpose, including commercial applications, and to alter it and |
---|
15 | redistribute it freely, subject to the following restrictions: |
---|
16 | |
---|
17 | 1. The origin of this software must not be misrepresented; you |
---|
18 | must not claim that you wrote the original software. If you use |
---|
19 | this software in a product, an acknowledgment in the product |
---|
20 | documentation would be appreciated but is not required. |
---|
21 | 2. Altered source versions must be plainly marked as such, and |
---|
22 | must not be misrepresented as being the original software. |
---|
23 | 3. This notice may not be removed or altered from any source |
---|
24 | distribution. |
---|
25 | |
---|
26 | ---------------------------------------------------------------------------------*/ |
---|
27 | |
---|
28 | #include <nds/jtypes.h> |
---|
29 | #include <nds/system.h> |
---|
30 | #include <nds/arm7/touch.h> |
---|
31 | #include <nds/interrupts.h> |
---|
32 | |
---|
33 | #include <stdlib.h> |
---|
34 | |
---|
35 | static u8 last_time_touched = 0; |
---|
36 | |
---|
37 | static u8 range_counter_1 = 0; |
---|
38 | static u8 range_counter_2 = 0; |
---|
39 | static u8 range = 20; |
---|
40 | static u8 min_range = 20; |
---|
41 | |
---|
42 | //--------------------------------------------------------------------------------- |
---|
43 | static u8 CheckStylus(void){ |
---|
44 | //--------------------------------------------------------------------------------- |
---|
45 | |
---|
46 | SerialWaitBusy(); |
---|
47 | |
---|
48 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH | SPI_CONTINUOUS; //0x8A01; |
---|
49 | REG_SPIDATA = TSC_MEASURE_TEMP1; |
---|
50 | |
---|
51 | SerialWaitBusy(); |
---|
52 | |
---|
53 | REG_SPIDATA = 0; |
---|
54 | |
---|
55 | SerialWaitBusy(); |
---|
56 | |
---|
57 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH;// 0x8201; |
---|
58 | REG_SPIDATA = 0; |
---|
59 | |
---|
60 | SerialWaitBusy(); |
---|
61 | |
---|
62 | if(last_time_touched == 1){ |
---|
63 | if( !(REG_KEYXY & 0x40) ) |
---|
64 | return 1; |
---|
65 | else{ |
---|
66 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH | SPI_CONTINUOUS; |
---|
67 | REG_SPIDATA = TSC_MEASURE_TEMP1; |
---|
68 | |
---|
69 | SerialWaitBusy(); |
---|
70 | |
---|
71 | REG_SPIDATA = 0; |
---|
72 | |
---|
73 | SerialWaitBusy(); |
---|
74 | |
---|
75 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH; |
---|
76 | REG_SPIDATA = 0; |
---|
77 | |
---|
78 | SerialWaitBusy(); |
---|
79 | |
---|
80 | return !(REG_KEYXY & 0x40) ? 2 : 0; |
---|
81 | } |
---|
82 | }else{ |
---|
83 | return !(REG_KEYXY & 0x40) ? 1 : 0; |
---|
84 | } |
---|
85 | } |
---|
86 | |
---|
87 | //--------------------------------------------------------------------------------- |
---|
88 | uint16 touchRead(uint32 command) { |
---|
89 | //--------------------------------------------------------------------------------- |
---|
90 | uint16 result, result2; |
---|
91 | |
---|
92 | uint32 oldIME = REG_IME; |
---|
93 | |
---|
94 | REG_IME = 0; |
---|
95 | |
---|
96 | SerialWaitBusy(); |
---|
97 | |
---|
98 | // Write the command and wait for it to complete |
---|
99 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH | SPI_CONTINUOUS; //0x8A01; |
---|
100 | REG_SPIDATA = command; |
---|
101 | SerialWaitBusy(); |
---|
102 | |
---|
103 | // Write the second command and clock in part of the data |
---|
104 | REG_SPIDATA = 0; |
---|
105 | SerialWaitBusy(); |
---|
106 | result = REG_SPIDATA; |
---|
107 | |
---|
108 | // Clock in the rest of the data (last transfer) |
---|
109 | REG_SPICNT = SPI_ENABLE | 0x201; |
---|
110 | REG_SPIDATA = 0; |
---|
111 | SerialWaitBusy(); |
---|
112 | |
---|
113 | result2 = REG_SPIDATA >>3; |
---|
114 | |
---|
115 | REG_IME = oldIME; |
---|
116 | |
---|
117 | // Return the result |
---|
118 | return ((result & 0x7F) << 5) | result2; |
---|
119 | } |
---|
120 | |
---|
121 | |
---|
122 | //--------------------------------------------------------------------------------- |
---|
123 | uint32 touchReadTemperature(int * t1, int * t2) { |
---|
124 | //--------------------------------------------------------------------------------- |
---|
125 | *t1 = touchRead(TSC_MEASURE_TEMP1); |
---|
126 | *t2 = touchRead(TSC_MEASURE_TEMP2); |
---|
127 | return 8490 * (*t2 - *t1) - 273*4096; |
---|
128 | } |
---|
129 | |
---|
130 | |
---|
131 | static bool touchInit = false; |
---|
132 | static s32 xscale, yscale; |
---|
133 | static s32 xoffset, yoffset; |
---|
134 | |
---|
135 | //--------------------------------------------------------------------------------- |
---|
136 | static int16 readTouchValue(uint32 command, int16 *dist_max, u8 *err){ |
---|
137 | //--------------------------------------------------------------------------------- |
---|
138 | int16 values[5]; |
---|
139 | int32 aux1, aux2, aux3, dist, dist2, result = 0; |
---|
140 | u8 i, j, k; |
---|
141 | |
---|
142 | *err = 1; |
---|
143 | |
---|
144 | SerialWaitBusy(); |
---|
145 | |
---|
146 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH | SPI_CONTINUOUS; |
---|
147 | REG_SPIDATA = command; |
---|
148 | |
---|
149 | SerialWaitBusy(); |
---|
150 | |
---|
151 | for(i=0; i<5; i++){ |
---|
152 | REG_SPIDATA = 0; |
---|
153 | SerialWaitBusy(); |
---|
154 | |
---|
155 | aux1 = REG_SPIDATA; |
---|
156 | aux1 = aux1 & 0xFF; |
---|
157 | aux1 = aux1 << 16; |
---|
158 | aux1 = aux1 >> 8; |
---|
159 | |
---|
160 | values[4-i] = aux1; |
---|
161 | |
---|
162 | REG_SPIDATA = command; |
---|
163 | SerialWaitBusy(); |
---|
164 | |
---|
165 | aux1 = REG_SPIDATA; |
---|
166 | aux1 = aux1 & 0xFF; |
---|
167 | aux1 = aux1 << 16; |
---|
168 | |
---|
169 | aux1 = values[4-i] | (aux1 >> 16); |
---|
170 | values[4-i] = ((aux1 & 0x7FF8) >> 3); |
---|
171 | } |
---|
172 | |
---|
173 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH; |
---|
174 | REG_SPIDATA = 0; |
---|
175 | SerialWaitBusy(); |
---|
176 | |
---|
177 | dist = 0; |
---|
178 | for(i=0; i<4; i++){ |
---|
179 | aux1 = values[i]; |
---|
180 | |
---|
181 | for(j=i+1; j<5; j++){ |
---|
182 | aux2 = values[j]; |
---|
183 | aux2 = abs(aux1 - aux2); |
---|
184 | if(aux2>dist) dist = aux2; |
---|
185 | } |
---|
186 | } |
---|
187 | |
---|
188 | *dist_max = dist; |
---|
189 | |
---|
190 | for(i=0; i<3; i++){ |
---|
191 | aux1 = values[i]; |
---|
192 | |
---|
193 | for(j=i+1; j<4; j++){ |
---|
194 | aux2 = values[j]; |
---|
195 | dist = abs(aux1 - aux2); |
---|
196 | |
---|
197 | if( dist <= range ){ |
---|
198 | for(k=j+1; k<5; k++){ |
---|
199 | aux3 = values[k]; |
---|
200 | dist2 = abs(aux1 - aux3); |
---|
201 | |
---|
202 | if( dist2 <= range ){ |
---|
203 | result = aux2 + (aux1 << 1); |
---|
204 | result = result + aux3; |
---|
205 | result = result >> 2; |
---|
206 | result = result & (~7); |
---|
207 | |
---|
208 | *err = 0; |
---|
209 | |
---|
210 | break; |
---|
211 | } |
---|
212 | } |
---|
213 | } |
---|
214 | } |
---|
215 | } |
---|
216 | |
---|
217 | if((*err) == 1){ |
---|
218 | result = values[0] + values[4]; |
---|
219 | result = result >> 1; |
---|
220 | result = result & (~7); |
---|
221 | } |
---|
222 | |
---|
223 | return (result & 0xFFF); |
---|
224 | } |
---|
225 | |
---|
226 | //--------------------------------------------------------------------------------- |
---|
227 | static void UpdateRange(uint8 *this_range, int16 last_dist_max, u8 data_error, u8 tsc_touched){ |
---|
228 | //--------------------------------------------------------------------------------- |
---|
229 | //range_counter_1 = counter_0x380A98C |
---|
230 | //range_counter_2 = counter_0x380A990 |
---|
231 | //Initial values: |
---|
232 | // range = 20 |
---|
233 | // min_range = 20 |
---|
234 | |
---|
235 | if(tsc_touched != 0){ |
---|
236 | if( data_error == 0){ |
---|
237 | range_counter_2 = 0; |
---|
238 | |
---|
239 | if( last_dist_max >= ((*this_range) >> 1)){ |
---|
240 | range_counter_1 = 0; |
---|
241 | }else{ |
---|
242 | range_counter_1++; |
---|
243 | |
---|
244 | if(range_counter_1 >= 4){ |
---|
245 | range_counter_1 = 0; |
---|
246 | |
---|
247 | if((*this_range) > min_range){ |
---|
248 | (*this_range)--; |
---|
249 | range_counter_2 = 3; |
---|
250 | } |
---|
251 | } |
---|
252 | } |
---|
253 | }else{ |
---|
254 | range_counter_1 = 0; |
---|
255 | range_counter_2++; |
---|
256 | |
---|
257 | if(range_counter_2 >= 4){ |
---|
258 | |
---|
259 | range_counter_2 = 0; |
---|
260 | |
---|
261 | if((*this_range) < 35){ //0x23 = 35 |
---|
262 | *this_range = (*this_range) + 1; |
---|
263 | } |
---|
264 | } |
---|
265 | } |
---|
266 | }else{ |
---|
267 | range_counter_2 = 0; |
---|
268 | range_counter_1 = 0; |
---|
269 | } |
---|
270 | } |
---|
271 | |
---|
272 | //--------------------------------------------------------------------------------- |
---|
273 | // reading pixel position: |
---|
274 | //--------------------------------------------------------------------------------- |
---|
275 | touchPosition touchReadXY() { |
---|
276 | //--------------------------------------------------------------------------------- |
---|
277 | |
---|
278 | int16 dist_max_y, dist_max_x, dist_max; |
---|
279 | u8 error, error_where, first_check, i; |
---|
280 | |
---|
281 | touchPosition touchPos = { 0, 0, 0, 0, 0, 0 }; |
---|
282 | |
---|
283 | if ( !touchInit ) { |
---|
284 | |
---|
285 | xscale = ((PersonalData->calX2px - PersonalData->calX1px) << 19) / ((PersonalData->calX2) - (PersonalData->calX1)); |
---|
286 | yscale = ((PersonalData->calY2px - PersonalData->calY1px) << 19) / ((PersonalData->calY2) - (PersonalData->calY1)); |
---|
287 | |
---|
288 | xoffset = ((PersonalData->calX1 + PersonalData->calX2) * xscale - ((PersonalData->calX1px + PersonalData->calX2px) << 19) ) / 2; |
---|
289 | yoffset = ((PersonalData->calY1 + PersonalData->calY2) * yscale - ((PersonalData->calY1px + PersonalData->calY2px) << 19) ) / 2; |
---|
290 | touchInit = true; |
---|
291 | } |
---|
292 | |
---|
293 | uint32 oldIME = REG_IME; |
---|
294 | |
---|
295 | REG_IME = 0; |
---|
296 | |
---|
297 | first_check = CheckStylus(); |
---|
298 | if(first_check != 0){ |
---|
299 | error_where = 0; |
---|
300 | |
---|
301 | touchPos.z1 = readTouchValue(TSC_MEASURE_Z1 | 1, &dist_max, &error); |
---|
302 | touchPos.z2 = readTouchValue(TSC_MEASURE_Z2 | 1, &dist_max, &error); |
---|
303 | |
---|
304 | touchPos.x = readTouchValue(TSC_MEASURE_X | 1, &dist_max_x, &error); |
---|
305 | if(error==1) error_where += 1; |
---|
306 | |
---|
307 | touchPos.y = readTouchValue(TSC_MEASURE_Y | 1, &dist_max_y, &error); |
---|
308 | if(error==1) error_where += 2; |
---|
309 | |
---|
310 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH | SPI_CONTINUOUS; |
---|
311 | for(i=0; i<12; i++){ |
---|
312 | REG_SPIDATA = 0; |
---|
313 | |
---|
314 | SerialWaitBusy(); |
---|
315 | } |
---|
316 | |
---|
317 | REG_SPICNT = SPI_ENABLE | SPI_BAUD_2MHz | SPI_DEVICE_TOUCH; |
---|
318 | REG_SPIDATA = 0; |
---|
319 | |
---|
320 | SerialWaitBusy(); |
---|
321 | |
---|
322 | if(first_check == 2) error_where = 3; |
---|
323 | |
---|
324 | switch( CheckStylus() ){ |
---|
325 | case 0: |
---|
326 | last_time_touched = 0; |
---|
327 | break; |
---|
328 | case 1: |
---|
329 | last_time_touched = 1; |
---|
330 | |
---|
331 | if(dist_max_x > dist_max_y) |
---|
332 | dist_max = dist_max_x; |
---|
333 | else |
---|
334 | dist_max = dist_max_y; |
---|
335 | |
---|
336 | break; |
---|
337 | case 2: |
---|
338 | last_time_touched = 0; |
---|
339 | error_where = 3; |
---|
340 | |
---|
341 | break; |
---|
342 | } |
---|
343 | |
---|
344 | s16 px = ( touchPos.x * xscale - xoffset + xscale/2 ) >>19; |
---|
345 | s16 py = ( touchPos.y * yscale - yoffset + yscale/2 ) >>19; |
---|
346 | |
---|
347 | if ( px < 0) px = 0; |
---|
348 | if ( py < 0) py = 0; |
---|
349 | if ( px > (SCREEN_WIDTH -1)) px = SCREEN_WIDTH -1; |
---|
350 | if ( py > (SCREEN_HEIGHT -1)) py = SCREEN_HEIGHT -1; |
---|
351 | |
---|
352 | touchPos.px = px; |
---|
353 | touchPos.py = py; |
---|
354 | |
---|
355 | |
---|
356 | }else{ |
---|
357 | error_where = 3; |
---|
358 | touchPos.x = 0; |
---|
359 | touchPos.y = 0; |
---|
360 | last_time_touched = 0; |
---|
361 | } |
---|
362 | |
---|
363 | UpdateRange(&range, dist_max, error_where, last_time_touched); |
---|
364 | |
---|
365 | REG_IME = oldIME; |
---|
366 | |
---|
367 | |
---|
368 | return touchPos; |
---|
369 | |
---|
370 | } |
---|
371 | |
---|