├── .github
└── FUNDING.yml
├── DS18B20.zip
├── LICENSE
├── README.md
├── ds18b20.c
├── ds18b20.h
├── ds18b20Config.h
├── onewire.c
└── onewire.h
/.github/FUNDING.yml:
--------------------------------------------------------------------------------
1 | # These are supported funding model platforms
2 |
3 | github: [nimaltd]
4 | patreon: # Replace with a single Patreon username
5 | open_collective: # Replace with a single Open Collective username
6 | ko_fi: nimaltd
7 | tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
8 | community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
9 | otechie: # Replace with a single Otechie username
10 | custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
11 |
--------------------------------------------------------------------------------
/DS18B20.zip:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/nimaltd/ds18b20/61bf9bbbb30e41e876389dadeffcc9476f5b0dce/DS18B20.zip
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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674 | .
675 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # ds18b20 library
2 | [](https://ko-fi.com/O5O4221XY)
3 | * http://www.github.com/NimaLTD
4 | * https://www.instagram.com/github.nimaltd/
5 | * https://www.youtube.com/@nimaltd
6 |
7 |
8 | I convert TM Library to Hal . www.stm32f4-discovery.net
9 |
10 | I hope use it and enjoy.
11 |
12 | I use Stm32f103vc and Keil Compiler and Stm32CubeMX wizard.
13 |
14 | Please Do This ...
15 |
16 |
17 | 1) Enable FreeRTOS
18 |
19 | 2) Config a Gpio and a timer on CubeMX . 1us per tick example 72 MHz cpu >>> Prescaler=(72-1) counter period=0xFFFF
20 |
21 | 3) Select "General peripheral Initalizion as a pair of '.c/.h' file per peripheral" on project settings.
22 |
23 | 4) Config your ds18b20Config.h file.
24 |
25 | 5) call Ds18b20_Init(osPriorityNormal) on your app.
26 |
27 | 6) You can see result on debug . watch : ds18b20.
28 |
29 |
--------------------------------------------------------------------------------
/ds18b20.c:
--------------------------------------------------------------------------------
1 |
2 |
3 | #include "ds18b20.h"
4 |
5 |
6 | //###################################################################################
7 | Ds18b20Sensor_t ds18b20[_DS18B20_MAX_SENSORS];
8 |
9 | OneWire_t OneWire;
10 | uint8_t OneWireDevices;
11 | uint8_t TempSensorCount=0;
12 | uint8_t Ds18b20StartConvert=0;
13 | uint16_t Ds18b20Timeout=0;
14 | #if (_DS18B20_USE_FREERTOS==1)
15 | osThreadId Ds18b20Handle;
16 | void Task_Ds18b20(void const * argument);
17 | #endif
18 |
19 | //###########################################################################################
20 | #if (_DS18B20_USE_FREERTOS==1)
21 | void Ds18b20_Init(osPriority Priority)
22 | {
23 | osThreadDef(myTask_Ds18b20, Task_Ds18b20, Priority, 0, 128);
24 | Ds18b20Handle = osThreadCreate(osThread(myTask_Ds18b20), NULL);
25 | }
26 | #else
27 | bool Ds18b20_Init(void)
28 | {
29 | uint8_t Ds18b20TryToFind=5;
30 | do
31 | {
32 | OneWire_Init(&OneWire,_DS18B20_GPIO ,_DS18B20_PIN);
33 | TempSensorCount = 0;
34 | while(HAL_GetTick() < 3000)
35 | Ds18b20Delay(100);
36 | OneWireDevices = OneWire_First(&OneWire);
37 | while (OneWireDevices)
38 | {
39 | Ds18b20Delay(100);
40 | TempSensorCount++;
41 | OneWire_GetFullROM(&OneWire, ds18b20[TempSensorCount-1].Address);
42 | OneWireDevices = OneWire_Next(&OneWire);
43 | }
44 | if(TempSensorCount>0)
45 | break;
46 | Ds18b20TryToFind--;
47 | }while(Ds18b20TryToFind>0);
48 | if(Ds18b20TryToFind==0)
49 | return false;
50 | for (uint8_t i = 0; i < TempSensorCount; i++)
51 | {
52 | Ds18b20Delay(50);
53 | DS18B20_SetResolution(&OneWire, ds18b20[i].Address, DS18B20_Resolution_12bits);
54 | Ds18b20Delay(50);
55 | DS18B20_DisableAlarmTemperature(&OneWire, ds18b20[i].Address);
56 | }
57 | return true;
58 | }
59 | #endif
60 | //###########################################################################################
61 | bool Ds18b20_ManualConvert(void)
62 | {
63 | #if (_DS18B20_USE_FREERTOS==1)
64 | Ds18b20StartConvert=1;
65 | while(Ds18b20StartConvert==1)
66 | Ds18b20Delay(10);
67 | if(Ds18b20Timeout==0)
68 | return false;
69 | else
70 | return true;
71 | #else
72 | Ds18b20Timeout=_DS18B20_CONVERT_TIMEOUT_MS/10;
73 | DS18B20_StartAll(&OneWire);
74 | Ds18b20Delay(100);
75 | while (!DS18B20_AllDone(&OneWire))
76 | {
77 | Ds18b20Delay(10);
78 | Ds18b20Timeout-=1;
79 | if(Ds18b20Timeout==0)
80 | break;
81 | }
82 | if(Ds18b20Timeout>0)
83 | {
84 | for (uint8_t i = 0; i < TempSensorCount; i++)
85 | {
86 | Ds18b20Delay(100);
87 | ds18b20[i].DataIsValid = DS18B20_Read(&OneWire, ds18b20[i].Address, &ds18b20[i].Temperature);
88 | }
89 | }
90 | else
91 | {
92 | for (uint8_t i = 0; i < TempSensorCount; i++)
93 | ds18b20[i].DataIsValid = false;
94 | }
95 | if(Ds18b20Timeout==0)
96 | return false;
97 | else
98 | return true;
99 | #endif
100 | }
101 | //###########################################################################################
102 | #if (_DS18B20_USE_FREERTOS==1)
103 | void Task_Ds18b20(void const * argument)
104 | {
105 | uint8_t Ds18b20TryToFind=5;
106 | do
107 | {
108 | OneWire_Init(&OneWire,_DS18B20_GPIO ,_DS18B20_PIN);
109 | TempSensorCount = 0;
110 | while(HAL_GetTick() < 3000)
111 | Ds18b20Delay(100);
112 | OneWireDevices = OneWire_First(&OneWire);
113 | while (OneWireDevices)
114 | {
115 | Ds18b20Delay(100);
116 | TempSensorCount++;
117 | OneWire_GetFullROM(&OneWire, ds18b20[TempSensorCount-1].Address);
118 | OneWireDevices = OneWire_Next(&OneWire);
119 | }
120 | if(TempSensorCount>0)
121 | break;
122 | Ds18b20TryToFind--;
123 | }while(Ds18b20TryToFind>0);
124 | if(Ds18b20TryToFind==0)
125 | vTaskDelete(Ds18b20Handle);
126 | for (uint8_t i = 0; i < TempSensorCount; i++)
127 | {
128 | Ds18b20Delay(50);
129 | DS18B20_SetResolution(&OneWire, ds18b20[i].Address, DS18B20_Resolution_12bits);
130 | Ds18b20Delay(50);
131 | DS18B20_DisableAlarmTemperature(&OneWire, ds18b20[i].Address);
132 | }
133 | for(;;)
134 | {
135 | while(_DS18B20_UPDATE_INTERVAL_MS==0)
136 | {
137 | if(Ds18b20StartConvert==1)
138 | break;
139 | Ds18b20Delay(10);
140 | }
141 | Ds18b20Timeout=_DS18B20_CONVERT_TIMEOUT_MS/10;
142 | DS18B20_StartAll(&OneWire);
143 | osDelay(100);
144 | while (!DS18B20_AllDone(&OneWire))
145 | {
146 | osDelay(10);
147 | Ds18b20Timeout-=1;
148 | if(Ds18b20Timeout==0)
149 | break;
150 | }
151 | if(Ds18b20Timeout>0)
152 | {
153 | for (uint8_t i = 0; i < TempSensorCount; i++)
154 | {
155 | Ds18b20Delay(1000);
156 | ds18b20[i].DataIsValid = DS18B20_Read(&OneWire, ds18b20[i].Address, &ds18b20[i].Temperature);
157 | }
158 | }
159 | else
160 | {
161 | for (uint8_t i = 0; i < TempSensorCount; i++)
162 | ds18b20[i].DataIsValid = false;
163 | }
164 | Ds18b20StartConvert=0;
165 | osDelay(_DS18B20_UPDATE_INTERVAL_MS);
166 | }
167 | }
168 | #endif
169 | //###########################################################################################
170 | uint8_t DS18B20_Start(OneWire_t* OneWire, uint8_t *ROM)
171 | {
172 | /* Check if device is DS18B20 */
173 | if (!DS18B20_Is(ROM)) {
174 | return 0;
175 | }
176 |
177 | /* Reset line */
178 | OneWire_Reset(OneWire);
179 | /* Select ROM number */
180 | OneWire_SelectWithPointer(OneWire, ROM);
181 | /* Start temperature conversion */
182 | OneWire_WriteByte(OneWire, DS18B20_CMD_CONVERTTEMP);
183 |
184 | return 1;
185 | }
186 |
187 | void DS18B20_StartAll(OneWire_t* OneWire)
188 | {
189 | /* Reset pulse */
190 | OneWire_Reset(OneWire);
191 | /* Skip rom */
192 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_SKIPROM);
193 | /* Start conversion on all connected devices */
194 | OneWire_WriteByte(OneWire, DS18B20_CMD_CONVERTTEMP);
195 | }
196 |
197 | bool DS18B20_Read(OneWire_t* OneWire, uint8_t *ROM, float *destination)
198 | {
199 | uint16_t temperature;
200 | uint8_t resolution;
201 | int8_t digit, minus = 0;
202 | float decimal;
203 | uint8_t i = 0;
204 | uint8_t data[9];
205 | uint8_t crc;
206 |
207 | /* Check if device is DS18B20 */
208 | if (!DS18B20_Is(ROM)) {
209 | return false;
210 | }
211 |
212 | /* Check if line is released, if it is, then conversion is complete */
213 | if (!OneWire_ReadBit(OneWire))
214 | {
215 | /* Conversion is not finished yet */
216 | return false;
217 | }
218 |
219 | /* Reset line */
220 | OneWire_Reset(OneWire);
221 | /* Select ROM number */
222 | OneWire_SelectWithPointer(OneWire, ROM);
223 | /* Read scratchpad command by onewire protocol */
224 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
225 |
226 | /* Get data */
227 | for (i = 0; i < 9; i++)
228 | {
229 | /* Read byte by byte */
230 | data[i] = OneWire_ReadByte(OneWire);
231 | }
232 |
233 | /* Calculate CRC */
234 | crc = OneWire_CRC8(data, 8);
235 |
236 | /* Check if CRC is ok */
237 | if (crc != data[8])
238 | /* CRC invalid */
239 | return 0;
240 |
241 |
242 | /* First two bytes of scratchpad are temperature values */
243 | temperature = data[0] | (data[1] << 8);
244 |
245 | /* Reset line */
246 | OneWire_Reset(OneWire);
247 |
248 | /* Check if temperature is negative */
249 | if (temperature & 0x8000)
250 | {
251 | /* Two's complement, temperature is negative */
252 | temperature = ~temperature + 1;
253 | minus = 1;
254 | }
255 |
256 |
257 | /* Get sensor resolution */
258 | resolution = ((data[4] & 0x60) >> 5) + 9;
259 |
260 |
261 | /* Store temperature integer digits and decimal digits */
262 | digit = temperature >> 4;
263 | digit |= ((temperature >> 8) & 0x7) << 4;
264 |
265 | /* Store decimal digits */
266 | switch (resolution)
267 | {
268 | case 9:
269 | decimal = (temperature >> 3) & 0x01;
270 | decimal *= (float)DS18B20_DECIMAL_STEPS_9BIT;
271 | break;
272 | case 10:
273 | decimal = (temperature >> 2) & 0x03;
274 | decimal *= (float)DS18B20_DECIMAL_STEPS_10BIT;
275 | break;
276 | case 11:
277 | decimal = (temperature >> 1) & 0x07;
278 | decimal *= (float)DS18B20_DECIMAL_STEPS_11BIT;
279 | break;
280 | case 12:
281 | decimal = temperature & 0x0F;
282 | decimal *= (float)DS18B20_DECIMAL_STEPS_12BIT;
283 | break;
284 | default:
285 | decimal = 0xFF;
286 | digit = 0;
287 | }
288 |
289 | /* Check for negative part */
290 | decimal = digit + decimal;
291 | if (minus)
292 | decimal = 0 - decimal;
293 |
294 |
295 | /* Set to pointer */
296 | *destination = decimal;
297 |
298 | /* Return 1, temperature valid */
299 | return true;
300 | }
301 |
302 | uint8_t DS18B20_GetResolution(OneWire_t* OneWire, uint8_t *ROM)
303 | {
304 | uint8_t conf;
305 |
306 | if (!DS18B20_Is(ROM))
307 | return 0;
308 |
309 | /* Reset line */
310 | OneWire_Reset(OneWire);
311 | /* Select ROM number */
312 | OneWire_SelectWithPointer(OneWire, ROM);
313 | /* Read scratchpad command by onewire protocol */
314 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
315 |
316 | /* Ignore first 4 bytes */
317 | OneWire_ReadByte(OneWire);
318 | OneWire_ReadByte(OneWire);
319 | OneWire_ReadByte(OneWire);
320 | OneWire_ReadByte(OneWire);
321 |
322 | /* 5th byte of scratchpad is configuration register */
323 | conf = OneWire_ReadByte(OneWire);
324 |
325 | /* Return 9 - 12 value according to number of bits */
326 | return ((conf & 0x60) >> 5) + 9;
327 | }
328 |
329 | uint8_t DS18B20_SetResolution(OneWire_t* OneWire, uint8_t *ROM, DS18B20_Resolution_t resolution)
330 | {
331 | uint8_t th, tl, conf;
332 | if (!DS18B20_Is(ROM))
333 | return 0;
334 |
335 |
336 | /* Reset line */
337 | OneWire_Reset(OneWire);
338 | /* Select ROM number */
339 | OneWire_SelectWithPointer(OneWire, ROM);
340 | /* Read scratchpad command by onewire protocol */
341 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
342 |
343 | /* Ignore first 2 bytes */
344 | OneWire_ReadByte(OneWire);
345 | OneWire_ReadByte(OneWire);
346 |
347 | th = OneWire_ReadByte(OneWire);
348 | tl = OneWire_ReadByte(OneWire);
349 | conf = OneWire_ReadByte(OneWire);
350 |
351 | if (resolution == DS18B20_Resolution_9bits)
352 | {
353 | conf &= ~(1 << DS18B20_RESOLUTION_R1);
354 | conf &= ~(1 << DS18B20_RESOLUTION_R0);
355 | }
356 | else if (resolution == DS18B20_Resolution_10bits)
357 | {
358 | conf &= ~(1 << DS18B20_RESOLUTION_R1);
359 | conf |= 1 << DS18B20_RESOLUTION_R0;
360 | }
361 | else if (resolution == DS18B20_Resolution_11bits)
362 | {
363 | conf |= 1 << DS18B20_RESOLUTION_R1;
364 | conf &= ~(1 << DS18B20_RESOLUTION_R0);
365 | }
366 | else if (resolution == DS18B20_Resolution_12bits)
367 | {
368 | conf |= 1 << DS18B20_RESOLUTION_R1;
369 | conf |= 1 << DS18B20_RESOLUTION_R0;
370 | }
371 |
372 | /* Reset line */
373 | OneWire_Reset(OneWire);
374 | /* Select ROM number */
375 | OneWire_SelectWithPointer(OneWire, ROM);
376 | /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
377 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
378 |
379 | /* Write bytes */
380 | OneWire_WriteByte(OneWire, th);
381 | OneWire_WriteByte(OneWire, tl);
382 | OneWire_WriteByte(OneWire, conf);
383 |
384 | /* Reset line */
385 | OneWire_Reset(OneWire);
386 | /* Select ROM number */
387 | OneWire_SelectWithPointer(OneWire, ROM);
388 | /* Copy scratchpad to EEPROM of DS18B20 */
389 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
390 |
391 | return 1;
392 | }
393 |
394 | uint8_t DS18B20_Is(uint8_t *ROM)
395 | {
396 | /* Checks if first byte is equal to DS18B20's family code */
397 | if (*ROM == DS18B20_FAMILY_CODE)
398 | return 1;
399 |
400 | return 0;
401 | }
402 |
403 | uint8_t DS18B20_SetAlarmLowTemperature(OneWire_t* OneWire, uint8_t *ROM, int8_t temp)
404 | {
405 | uint8_t tl, th, conf;
406 | if (!DS18B20_Is(ROM))
407 | return 0;
408 |
409 | if (temp > 125)
410 | temp = 125;
411 |
412 | if (temp < -55)
413 | temp = -55;
414 |
415 | /* Reset line */
416 | OneWire_Reset(OneWire);
417 | /* Select ROM number */
418 | OneWire_SelectWithPointer(OneWire, ROM);
419 | /* Read scratchpad command by onewire protocol */
420 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
421 |
422 | /* Ignore first 2 bytes */
423 | OneWire_ReadByte(OneWire);
424 | OneWire_ReadByte(OneWire);
425 |
426 | th = OneWire_ReadByte(OneWire);
427 | tl = OneWire_ReadByte(OneWire);
428 | conf = OneWire_ReadByte(OneWire);
429 |
430 | tl = (uint8_t)temp;
431 |
432 | /* Reset line */
433 | OneWire_Reset(OneWire);
434 | /* Select ROM number */
435 | OneWire_SelectWithPointer(OneWire, ROM);
436 | /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
437 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
438 |
439 | /* Write bytes */
440 | OneWire_WriteByte(OneWire, th);
441 | OneWire_WriteByte(OneWire, tl);
442 | OneWire_WriteByte(OneWire, conf);
443 |
444 | /* Reset line */
445 | OneWire_Reset(OneWire);
446 | /* Select ROM number */
447 | OneWire_SelectWithPointer(OneWire, ROM);
448 | /* Copy scratchpad to EEPROM of DS18B20 */
449 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
450 |
451 | return 1;
452 | }
453 |
454 | uint8_t DS18B20_SetAlarmHighTemperature(OneWire_t* OneWire, uint8_t *ROM, int8_t temp)
455 | {
456 | uint8_t tl, th, conf;
457 | if (!DS18B20_Is(ROM))
458 | return 0;
459 |
460 | if (temp > 125)
461 | temp = 125;
462 |
463 | if (temp < -55)
464 | temp = -55;
465 |
466 | /* Reset line */
467 | OneWire_Reset(OneWire);
468 | /* Select ROM number */
469 | OneWire_SelectWithPointer(OneWire, ROM);
470 | /* Read scratchpad command by onewire protocol */
471 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
472 |
473 | /* Ignore first 2 bytes */
474 | OneWire_ReadByte(OneWire);
475 | OneWire_ReadByte(OneWire);
476 |
477 | th = OneWire_ReadByte(OneWire);
478 | tl = OneWire_ReadByte(OneWire);
479 | conf = OneWire_ReadByte(OneWire);
480 |
481 | th = (uint8_t)temp;
482 |
483 | /* Reset line */
484 | OneWire_Reset(OneWire);
485 | /* Select ROM number */
486 | OneWire_SelectWithPointer(OneWire, ROM);
487 | /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
488 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
489 |
490 | /* Write bytes */
491 | OneWire_WriteByte(OneWire, th);
492 | OneWire_WriteByte(OneWire, tl);
493 | OneWire_WriteByte(OneWire, conf);
494 |
495 | /* Reset line */
496 | OneWire_Reset(OneWire);
497 | /* Select ROM number */
498 | OneWire_SelectWithPointer(OneWire, ROM);
499 | /* Copy scratchpad to EEPROM of DS18B20 */
500 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
501 |
502 | return 1;
503 | }
504 |
505 | uint8_t DS18B20_DisableAlarmTemperature(OneWire_t* OneWire, uint8_t *ROM)
506 | {
507 | uint8_t tl, th, conf;
508 | if (!DS18B20_Is(ROM))
509 | return 0;
510 |
511 | /* Reset line */
512 | OneWire_Reset(OneWire);
513 | /* Select ROM number */
514 | OneWire_SelectWithPointer(OneWire, ROM);
515 | /* Read scratchpad command by onewire protocol */
516 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
517 |
518 | /* Ignore first 2 bytes */
519 | OneWire_ReadByte(OneWire);
520 | OneWire_ReadByte(OneWire);
521 |
522 | th = OneWire_ReadByte(OneWire);
523 | tl = OneWire_ReadByte(OneWire);
524 | conf = OneWire_ReadByte(OneWire);
525 |
526 | th = 125;
527 | tl = (uint8_t)-55;
528 |
529 | /* Reset line */
530 | OneWire_Reset(OneWire);
531 | /* Select ROM number */
532 | OneWire_SelectWithPointer(OneWire, ROM);
533 | /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
534 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
535 |
536 | /* Write bytes */
537 | OneWire_WriteByte(OneWire, th);
538 | OneWire_WriteByte(OneWire, tl);
539 | OneWire_WriteByte(OneWire, conf);
540 |
541 | /* Reset line */
542 | OneWire_Reset(OneWire);
543 | /* Select ROM number */
544 | OneWire_SelectWithPointer(OneWire, ROM);
545 | /* Copy scratchpad to EEPROM of DS18B20 */
546 | OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
547 |
548 | return 1;
549 | }
550 |
551 | uint8_t DS18B20_AlarmSearch(OneWire_t* OneWire)
552 | {
553 | /* Start alarm search */
554 | return OneWire_Search(OneWire, DS18B20_CMD_ALARMSEARCH);
555 | }
556 |
557 | uint8_t DS18B20_AllDone(OneWire_t* OneWire)
558 | {
559 | /* If read bit is low, then device is not finished yet with calculation temperature */
560 | return OneWire_ReadBit(OneWire);
561 | }
562 |
563 |
564 |
--------------------------------------------------------------------------------
/ds18b20.h:
--------------------------------------------------------------------------------
1 |
2 | #ifndef _DS18B20_H
3 | #define _DS18B20_H
4 | // 2018/09/08
5 |
6 |
7 | #include "onewire.h"
8 | #include "ds18b20Config.h"
9 | #include
10 |
11 | #if (_DS18B20_USE_FREERTOS==1)
12 | #include "cmsis_os.h"
13 | #define Ds18b20Delay(x) osDelay(x)
14 | #else
15 | #define Ds18b20Delay(x) HAL_Delay(x)
16 | #endif
17 |
18 | //###################################################################################
19 | typedef struct
20 | {
21 | uint8_t Address[8];
22 | float Temperature;
23 | bool DataIsValid;
24 |
25 | }Ds18b20Sensor_t;
26 | //###################################################################################
27 |
28 | extern Ds18b20Sensor_t ds18b20[_DS18B20_MAX_SENSORS];
29 |
30 | //###################################################################################
31 | /* Every onewire chip has different ROM code, but all the same chips has same family code */
32 | /* in case of DS18B20 this is 0x28 and this is first byte of ROM address */
33 | #define DS18B20_FAMILY_CODE 0x28
34 | #define DS18B20_CMD_ALARMSEARCH 0xEC
35 |
36 | /* DS18B20 read temperature command */
37 | #define DS18B20_CMD_CONVERTTEMP 0x44 /* Convert temperature */
38 | #define DS18B20_DECIMAL_STEPS_12BIT 0.0625
39 | #define DS18B20_DECIMAL_STEPS_11BIT 0.125
40 | #define DS18B20_DECIMAL_STEPS_10BIT 0.25
41 | #define DS18B20_DECIMAL_STEPS_9BIT 0.5
42 |
43 | /* Bits locations for resolution */
44 | #define DS18B20_RESOLUTION_R1 6
45 | #define DS18B20_RESOLUTION_R0 5
46 |
47 | /* CRC enabled */
48 | #ifdef DS18B20_USE_CRC
49 | #define DS18B20_DATA_LEN 9
50 | #else
51 | #define DS18B20_DATA_LEN 2
52 | #endif
53 |
54 | //###################################################################################
55 | typedef enum {
56 | DS18B20_Resolution_9bits = 9, /*!< DS18B20 9 bits resolution */
57 | DS18B20_Resolution_10bits = 10, /*!< DS18B20 10 bits resolution */
58 | DS18B20_Resolution_11bits = 11, /*!< DS18B20 11 bits resolution */
59 | DS18B20_Resolution_12bits = 12 /*!< DS18B20 12 bits resolution */
60 | } DS18B20_Resolution_t;
61 |
62 | //###################################################################################
63 | #if (_DS18B20_USE_FREERTOS==1)
64 | void Ds18b20_Init(osPriority Priority);
65 | #else
66 | bool Ds18b20_Init(void);
67 | #endif
68 | bool Ds18b20_ManualConvert(void);
69 | //###################################################################################
70 | uint8_t DS18B20_Start(OneWire_t* OneWireStruct, uint8_t* ROM);
71 | void DS18B20_StartAll(OneWire_t* OneWireStruct);
72 | bool DS18B20_Read(OneWire_t* OneWireStruct, uint8_t* ROM, float* destination);
73 | uint8_t DS18B20_GetResolution(OneWire_t* OneWireStruct, uint8_t* ROM);
74 | uint8_t DS18B20_SetResolution(OneWire_t* OneWireStruct, uint8_t* ROM, DS18B20_Resolution_t resolution);
75 | uint8_t DS18B20_Is(uint8_t* ROM);
76 | uint8_t DS18B20_SetAlarmHighTemperature(OneWire_t* OneWireStruct, uint8_t* ROM, int8_t temp);
77 | uint8_t DS18B20_SetAlarmLowTemperature(OneWire_t* OneWireStruct, uint8_t* ROM, int8_t temp);
78 | uint8_t DS18B20_DisableAlarmTemperature(OneWire_t* OneWireStruct, uint8_t* ROM);
79 | uint8_t DS18B20_AlarmSearch(OneWire_t* OneWireStruct);
80 | uint8_t DS18B20_AllDone(OneWire_t* OneWireStruct);
81 | //###################################################################################
82 |
83 |
84 | #endif
85 |
86 |
--------------------------------------------------------------------------------
/ds18b20Config.h:
--------------------------------------------------------------------------------
1 | #ifndef _DS18B20CONFIG_H
2 | #define _DS18B20CONFIG_H
3 |
4 |
5 | // Init timer on cube 1us per tick example 72 MHz cpu >>> Prescaler=(72-1) counter period=Max
6 | //###################################################################################
7 | #define _DS18B20_USE_FREERTOS 1
8 | #define _DS18B20_MAX_SENSORS 1
9 | #define _DS18B20_GPIO DS18B20_GPIO_Port
10 | #define _DS18B20_PIN DS18B20_Pin
11 |
12 | #define _DS18B20_CONVERT_TIMEOUT_MS 5000
13 | #if (_DS18B20_USE_FREERTOS==1)
14 | #define _DS18B20_UPDATE_INTERVAL_MS 10000 // ((( if==0 >> Ds18b20_ManualConvert() ))) ((( if>0 >>>> Auto refresh )))
15 | #endif
16 |
17 |
18 | #define _DS18B20_TIMER htim13
19 | //###################################################################################
20 |
21 | #endif
22 |
23 |
24 |
--------------------------------------------------------------------------------
/onewire.c:
--------------------------------------------------------------------------------
1 | /**
2 | * |----------------------------------------------------------------------
3 | * | Copyright (C) Tilen Majerle, 2014
4 | * |
5 | * | This program is free software: you can redistribute it and/or modify
6 | * | it under the terms of the GNU General Public License as published by
7 | * | the Free Software Foundation, either version 3 of the License, or
8 | * | any later version.
9 | * |
10 | * | This program is distributed in the hope that it will be useful,
11 | * | but WITHOUT ANY WARRANTY; without even the implied warranty of
12 | * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 | * | GNU General Public License for more details.
14 | * |
15 | * | You should have received a copy of the GNU General Public License
16 | * | along with this program. If not, see .
17 | * |----------------------------------------------------------------------
18 | */
19 | #include "onewire.h"
20 | #include "ds18b20Config.h"
21 | #include "tim.h"
22 |
23 | void ONEWIRE_DELAY(uint16_t time_us)
24 | {
25 | _DS18B20_TIMER.Instance->CNT = 0;
26 | while(_DS18B20_TIMER.Instance->CNT <= time_us);
27 | }
28 | void ONEWIRE_LOW(OneWire_t *gp)
29 | {
30 | gp->GPIOx->BSRR = gp->GPIO_Pin<<16;
31 | }
32 | void ONEWIRE_HIGH(OneWire_t *gp)
33 | {
34 | gp->GPIOx->BSRR = gp->GPIO_Pin;
35 | }
36 | void ONEWIRE_INPUT(OneWire_t *gp)
37 | {
38 | GPIO_InitTypeDef gpinit;
39 | gpinit.Mode = GPIO_MODE_INPUT;
40 | gpinit.Pull = GPIO_NOPULL;
41 | gpinit.Speed = GPIO_SPEED_FREQ_HIGH;
42 | gpinit.Pin = gp->GPIO_Pin;
43 | HAL_GPIO_Init(gp->GPIOx,&gpinit);
44 | }
45 | void ONEWIRE_OUTPUT(OneWire_t *gp)
46 | {
47 | GPIO_InitTypeDef gpinit;
48 | gpinit.Mode = GPIO_MODE_OUTPUT_OD;
49 | gpinit.Pull = GPIO_NOPULL;
50 | gpinit.Speed = GPIO_SPEED_FREQ_HIGH;
51 | gpinit.Pin = gp->GPIO_Pin;
52 | HAL_GPIO_Init(gp->GPIOx,&gpinit);
53 |
54 | }
55 | void OneWire_Init(OneWire_t* OneWireStruct, GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
56 | {
57 | HAL_TIM_Base_Start(&_DS18B20_TIMER);
58 |
59 | OneWireStruct->GPIOx = GPIOx;
60 | OneWireStruct->GPIO_Pin = GPIO_Pin;
61 | ONEWIRE_OUTPUT(OneWireStruct);
62 | ONEWIRE_HIGH(OneWireStruct);
63 | OneWireDelay(1000);
64 | ONEWIRE_LOW(OneWireStruct);
65 | OneWireDelay(1000);
66 | ONEWIRE_HIGH(OneWireStruct);
67 | OneWireDelay(2000);
68 | }
69 |
70 | inline uint8_t OneWire_Reset(OneWire_t* OneWireStruct)
71 | {
72 | uint8_t i;
73 |
74 | /* Line low, and wait 480us */
75 | ONEWIRE_LOW(OneWireStruct);
76 | ONEWIRE_OUTPUT(OneWireStruct);
77 | ONEWIRE_DELAY(480);
78 | ONEWIRE_DELAY(20);
79 | /* Release line and wait for 70us */
80 | ONEWIRE_INPUT(OneWireStruct);
81 | ONEWIRE_DELAY(70);
82 | /* Check bit value */
83 | i = HAL_GPIO_ReadPin(OneWireStruct->GPIOx, OneWireStruct->GPIO_Pin);
84 |
85 | /* Delay for 410 us */
86 | ONEWIRE_DELAY(410);
87 | /* Return value of presence pulse, 0 = OK, 1 = ERROR */
88 | return i;
89 | }
90 |
91 | inline void OneWire_WriteBit(OneWire_t* OneWireStruct, uint8_t bit)
92 | {
93 | if (bit)
94 | {
95 | /* Set line low */
96 | ONEWIRE_LOW(OneWireStruct);
97 | ONEWIRE_OUTPUT(OneWireStruct);
98 | ONEWIRE_DELAY(10);
99 |
100 | /* Bit high */
101 | ONEWIRE_INPUT(OneWireStruct);
102 |
103 | /* Wait for 55 us and release the line */
104 | ONEWIRE_DELAY(55);
105 | ONEWIRE_INPUT(OneWireStruct);
106 | }
107 | else
108 | {
109 | /* Set line low */
110 | ONEWIRE_LOW(OneWireStruct);
111 | ONEWIRE_OUTPUT(OneWireStruct);
112 | ONEWIRE_DELAY(65);
113 |
114 | /* Bit high */
115 | ONEWIRE_INPUT(OneWireStruct);
116 |
117 | /* Wait for 5 us and release the line */
118 | ONEWIRE_DELAY(5);
119 | ONEWIRE_INPUT(OneWireStruct);
120 | }
121 |
122 | }
123 |
124 | inline uint8_t OneWire_ReadBit(OneWire_t* OneWireStruct)
125 | {
126 | uint8_t bit = 0;
127 |
128 | /* Line low */
129 | ONEWIRE_LOW(OneWireStruct);
130 | ONEWIRE_OUTPUT(OneWireStruct);
131 | ONEWIRE_DELAY(2);
132 |
133 | /* Release line */
134 | ONEWIRE_INPUT(OneWireStruct);
135 | ONEWIRE_DELAY(10);
136 |
137 | /* Read line value */
138 | if (HAL_GPIO_ReadPin(OneWireStruct->GPIOx, OneWireStruct->GPIO_Pin)) {
139 | /* Bit is HIGH */
140 | bit = 1;
141 | }
142 |
143 | /* Wait 50us to complete 60us period */
144 | ONEWIRE_DELAY(50);
145 |
146 | /* Return bit value */
147 | return bit;
148 | }
149 |
150 | void OneWire_WriteByte(OneWire_t* OneWireStruct, uint8_t byte) {
151 | uint8_t i = 8;
152 | /* Write 8 bits */
153 | while (i--) {
154 | /* LSB bit is first */
155 | OneWire_WriteBit(OneWireStruct, byte & 0x01);
156 | byte >>= 1;
157 | }
158 | }
159 |
160 | uint8_t OneWire_ReadByte(OneWire_t* OneWireStruct) {
161 | uint8_t i = 8, byte = 0;
162 | while (i--) {
163 | byte >>= 1;
164 | byte |= (OneWire_ReadBit(OneWireStruct) << 7);
165 | }
166 |
167 | return byte;
168 | }
169 |
170 | uint8_t OneWire_First(OneWire_t* OneWireStruct) {
171 | /* Reset search values */
172 | OneWire_ResetSearch(OneWireStruct);
173 |
174 | /* Start with searching */
175 | return OneWire_Search(OneWireStruct, ONEWIRE_CMD_SEARCHROM);
176 | }
177 |
178 | uint8_t OneWire_Next(OneWire_t* OneWireStruct) {
179 | /* Leave the search state alone */
180 | return OneWire_Search(OneWireStruct, ONEWIRE_CMD_SEARCHROM);
181 | }
182 |
183 | void OneWire_ResetSearch(OneWire_t* OneWireStruct) {
184 | /* Reset the search state */
185 | OneWireStruct->LastDiscrepancy = 0;
186 | OneWireStruct->LastDeviceFlag = 0;
187 | OneWireStruct->LastFamilyDiscrepancy = 0;
188 | }
189 |
190 | uint8_t OneWire_Search(OneWire_t* OneWireStruct, uint8_t command) {
191 | uint8_t id_bit_number;
192 | uint8_t last_zero, rom_byte_number, search_result;
193 | uint8_t id_bit, cmp_id_bit;
194 | uint8_t rom_byte_mask, search_direction;
195 |
196 | /* Initialize for search */
197 | id_bit_number = 1;
198 | last_zero = 0;
199 | rom_byte_number = 0;
200 | rom_byte_mask = 1;
201 | search_result = 0;
202 |
203 | // if the last call was not the last one
204 | if (!OneWireStruct->LastDeviceFlag)
205 | {
206 | // 1-Wire reset
207 | if (OneWire_Reset(OneWireStruct))
208 | {
209 | /* Reset the search */
210 | OneWireStruct->LastDiscrepancy = 0;
211 | OneWireStruct->LastDeviceFlag = 0;
212 | OneWireStruct->LastFamilyDiscrepancy = 0;
213 | return 0;
214 | }
215 |
216 | // issue the search command
217 | OneWire_WriteByte(OneWireStruct, command);
218 |
219 | // loop to do the search
220 | do {
221 | // read a bit and its complement
222 | id_bit = OneWire_ReadBit(OneWireStruct);
223 | cmp_id_bit = OneWire_ReadBit(OneWireStruct);
224 |
225 | // check for no devices on 1-wire
226 | if ((id_bit == 1) && (cmp_id_bit == 1)) {
227 | break;
228 | } else {
229 | // all devices coupled have 0 or 1
230 | if (id_bit != cmp_id_bit) {
231 | search_direction = id_bit; // bit write value for search
232 | } else {
233 | // if this discrepancy if before the Last Discrepancy
234 | // on a previous next then pick the same as last time
235 | if (id_bit_number < OneWireStruct->LastDiscrepancy) {
236 | search_direction = ((OneWireStruct->ROM_NO[rom_byte_number] & rom_byte_mask) > 0);
237 | } else {
238 | // if equal to last pick 1, if not then pick 0
239 | search_direction = (id_bit_number == OneWireStruct->LastDiscrepancy);
240 | }
241 |
242 | // if 0 was picked then record its position in LastZero
243 | if (search_direction == 0) {
244 | last_zero = id_bit_number;
245 |
246 | // check for Last discrepancy in family
247 | if (last_zero < 9) {
248 | OneWireStruct->LastFamilyDiscrepancy = last_zero;
249 | }
250 | }
251 | }
252 |
253 | // set or clear the bit in the ROM byte rom_byte_number
254 | // with mask rom_byte_mask
255 | if (search_direction == 1) {
256 | OneWireStruct->ROM_NO[rom_byte_number] |= rom_byte_mask;
257 | } else {
258 | OneWireStruct->ROM_NO[rom_byte_number] &= ~rom_byte_mask;
259 | }
260 |
261 | // serial number search direction write bit
262 | OneWire_WriteBit(OneWireStruct, search_direction);
263 |
264 | // increment the byte counter id_bit_number
265 | // and shift the mask rom_byte_mask
266 | id_bit_number++;
267 | rom_byte_mask <<= 1;
268 |
269 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
270 | if (rom_byte_mask == 0) {
271 | //docrc8(ROM_NO[rom_byte_number]); // accumulate the CRC
272 | rom_byte_number++;
273 | rom_byte_mask = 1;
274 | }
275 | }
276 | } while (rom_byte_number < 8); // loop until through all ROM bytes 0-7
277 |
278 | // if the search was successful then
279 | if (!(id_bit_number < 65)) {
280 | // search successful so set LastDiscrepancy,LastDeviceFlag,search_result
281 | OneWireStruct->LastDiscrepancy = last_zero;
282 |
283 | // check for last device
284 | if (OneWireStruct->LastDiscrepancy == 0) {
285 | OneWireStruct->LastDeviceFlag = 1;
286 | }
287 |
288 | search_result = 1;
289 | }
290 | }
291 |
292 | // if no device found then reset counters so next 'search' will be like a first
293 | if (!search_result || !OneWireStruct->ROM_NO[0]) {
294 | OneWireStruct->LastDiscrepancy = 0;
295 | OneWireStruct->LastDeviceFlag = 0;
296 | OneWireStruct->LastFamilyDiscrepancy = 0;
297 | search_result = 0;
298 | }
299 |
300 | return search_result;
301 | }
302 |
303 | int OneWire_Verify(OneWire_t* OneWireStruct) {
304 | unsigned char rom_backup[8];
305 | int i,rslt,ld_backup,ldf_backup,lfd_backup;
306 |
307 | // keep a backup copy of the current state
308 | for (i = 0; i < 8; i++)
309 | rom_backup[i] = OneWireStruct->ROM_NO[i];
310 | ld_backup = OneWireStruct->LastDiscrepancy;
311 | ldf_backup = OneWireStruct->LastDeviceFlag;
312 | lfd_backup = OneWireStruct->LastFamilyDiscrepancy;
313 |
314 | // set search to find the same device
315 | OneWireStruct->LastDiscrepancy = 64;
316 | OneWireStruct->LastDeviceFlag = 0;
317 |
318 | if (OneWire_Search(OneWireStruct, ONEWIRE_CMD_SEARCHROM)) {
319 | // check if same device found
320 | rslt = 1;
321 | for (i = 0; i < 8; i++) {
322 | if (rom_backup[i] != OneWireStruct->ROM_NO[i]) {
323 | rslt = 1;
324 | break;
325 | }
326 | }
327 | } else {
328 | rslt = 0;
329 | }
330 |
331 | // restore the search state
332 | for (i = 0; i < 8; i++) {
333 | OneWireStruct->ROM_NO[i] = rom_backup[i];
334 | }
335 | OneWireStruct->LastDiscrepancy = ld_backup;
336 | OneWireStruct->LastDeviceFlag = ldf_backup;
337 | OneWireStruct->LastFamilyDiscrepancy = lfd_backup;
338 |
339 | // return the result of the verify
340 | return rslt;
341 | }
342 |
343 | void OneWire_TargetSetup(OneWire_t* OneWireStruct, uint8_t family_code) {
344 | uint8_t i;
345 |
346 | // set the search state to find SearchFamily type devices
347 | OneWireStruct->ROM_NO[0] = family_code;
348 | for (i = 1; i < 8; i++) {
349 | OneWireStruct->ROM_NO[i] = 0;
350 | }
351 |
352 | OneWireStruct->LastDiscrepancy = 64;
353 | OneWireStruct->LastFamilyDiscrepancy = 0;
354 | OneWireStruct->LastDeviceFlag = 0;
355 | }
356 |
357 | void OneWire_FamilySkipSetup(OneWire_t* OneWireStruct) {
358 | // set the Last discrepancy to last family discrepancy
359 | OneWireStruct->LastDiscrepancy = OneWireStruct->LastFamilyDiscrepancy;
360 | OneWireStruct->LastFamilyDiscrepancy = 0;
361 |
362 | // check for end of list
363 | if (OneWireStruct->LastDiscrepancy == 0) {
364 | OneWireStruct->LastDeviceFlag = 1;
365 | }
366 | }
367 |
368 | uint8_t OneWire_GetROM(OneWire_t* OneWireStruct, uint8_t index) {
369 | return OneWireStruct->ROM_NO[index];
370 | }
371 |
372 | void OneWire_Select(OneWire_t* OneWireStruct, uint8_t* addr) {
373 | uint8_t i;
374 | OneWire_WriteByte(OneWireStruct, ONEWIRE_CMD_MATCHROM);
375 |
376 | for (i = 0; i < 8; i++) {
377 | OneWire_WriteByte(OneWireStruct, *(addr + i));
378 | }
379 | }
380 |
381 | void OneWire_SelectWithPointer(OneWire_t* OneWireStruct, uint8_t *ROM) {
382 | uint8_t i;
383 | OneWire_WriteByte(OneWireStruct, ONEWIRE_CMD_MATCHROM);
384 |
385 | for (i = 0; i < 8; i++) {
386 | OneWire_WriteByte(OneWireStruct, *(ROM + i));
387 | }
388 | }
389 |
390 | void OneWire_GetFullROM(OneWire_t* OneWireStruct, uint8_t *firstIndex) {
391 | uint8_t i;
392 | for (i = 0; i < 8; i++) {
393 | *(firstIndex + i) = OneWireStruct->ROM_NO[i];
394 | }
395 | }
396 |
397 | uint8_t OneWire_CRC8(uint8_t *addr, uint8_t len) {
398 | uint8_t crc = 0, inbyte, i, mix;
399 |
400 | while (len--) {
401 | inbyte = *addr++;
402 | for (i = 8; i; i--) {
403 | mix = (crc ^ inbyte) & 0x01;
404 | crc >>= 1;
405 | if (mix) {
406 | crc ^= 0x8C;
407 | }
408 | inbyte >>= 1;
409 | }
410 | }
411 |
412 | /* Return calculated CRC */
413 | return crc;
414 | }
415 |
416 |
--------------------------------------------------------------------------------
/onewire.h:
--------------------------------------------------------------------------------
1 |
2 | #ifndef ONEWIRE_H
3 | #define ONEWIRE_H
4 |
5 | /* C++ detection */
6 | #ifdef __cplusplus
7 | extern "C" {
8 | #endif
9 |
10 | #include "gpio.h"
11 | #if (_DS18B20_USE_FREERTOS==1)
12 | #include "cmsis_os.h"
13 | #define OneWireDelay(x) osDelay(x)
14 | #else
15 | #define OneWireDelay(x) HAL_Delay(x)
16 | #endif
17 |
18 |
19 | typedef struct {
20 | GPIO_TypeDef* GPIOx; /*!< GPIOx port to be used for I/O functions */
21 | uint16_t GPIO_Pin; /*!< GPIO Pin to be used for I/O functions */
22 | uint8_t LastDiscrepancy; /*!< Search private */
23 | uint8_t LastFamilyDiscrepancy; /*!< Search private */
24 | uint8_t LastDeviceFlag; /*!< Search private */
25 | uint8_t ROM_NO[8]; /*!< 8-bytes address of last search device */
26 | } OneWire_t;
27 |
28 | /* OneWire delay */
29 | void ONEWIRE_DELAY(uint16_t time_us);
30 |
31 | /* Pin settings */
32 | void ONEWIRE_LOW(OneWire_t *gp);
33 | void ONEWIRE_HIGH(OneWire_t *gp);
34 | void ONEWIRE_INPUT(OneWire_t *gp);
35 | void ONEWIRE_OUTPUT(OneWire_t *gp);
36 |
37 | /* OneWire commands */
38 | #define ONEWIRE_CMD_RSCRATCHPAD 0xBE
39 | #define ONEWIRE_CMD_WSCRATCHPAD 0x4E
40 | #define ONEWIRE_CMD_CPYSCRATCHPAD 0x48
41 | #define ONEWIRE_CMD_RECEEPROM 0xB8
42 | #define ONEWIRE_CMD_RPWRSUPPLY 0xB4
43 | #define ONEWIRE_CMD_SEARCHROM 0xF0
44 | #define ONEWIRE_CMD_READROM 0x33
45 | #define ONEWIRE_CMD_MATCHROM 0x55
46 | #define ONEWIRE_CMD_SKIPROM 0xCC
47 |
48 | //#######################################################################################################
49 | void OneWire_Init(OneWire_t* OneWireStruct, GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
50 | uint8_t OneWire_Reset(OneWire_t* OneWireStruct);
51 | uint8_t OneWire_ReadByte(OneWire_t* OneWireStruct);
52 | void OneWire_WriteByte(OneWire_t* OneWireStruct, uint8_t byte);
53 | void OneWire_WriteBit(OneWire_t* OneWireStruct, uint8_t bit);
54 | uint8_t OneWire_ReadBit(OneWire_t* OneWireStruct);
55 | uint8_t OneWire_Search(OneWire_t* OneWireStruct, uint8_t command);
56 | void OneWire_ResetSearch(OneWire_t* OneWireStruct);
57 | uint8_t OneWire_First(OneWire_t* OneWireStruct);
58 | uint8_t OneWire_Next(OneWire_t* OneWireStruct);
59 | void OneWire_GetFullROM(OneWire_t* OneWireStruct, uint8_t *firstIndex);
60 | void OneWire_Select(OneWire_t* OneWireStruct, uint8_t* addr);
61 | void OneWire_SelectWithPointer(OneWire_t* OneWireStruct, uint8_t* ROM);
62 | uint8_t OneWire_CRC8(uint8_t* addr, uint8_t len);
63 | //#######################################################################################################
64 |
65 | /* C++ detection */
66 | #ifdef __cplusplus
67 | }
68 | #endif
69 |
70 | #endif
71 |
72 |
--------------------------------------------------------------------------------