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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2018 James Churchill <pelrun@gmail.com> | |
5 | * Copyright (C) 2019 Frank Stettner <frank-stettner@gmx.net> | |
6 | * Copyright (C) 2021 Gerhard Sittig <gerhard.sittig@gmx.net> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include <config.h> | |
23 | ||
24 | #include <string.h> | |
25 | ||
26 | #include "protocol.h" | |
27 | ||
28 | enum rdtech_dps_register { | |
29 | REG_DPS_USET = 0x00, /* Mirror of 0x50 */ | |
30 | REG_DPS_ISET = 0x01, /* Mirror of 0x51 */ | |
31 | REG_DPS_UOUT = 0x02, | |
32 | REG_DPS_IOUT = 0x03, | |
33 | REG_DPS_POWER = 0x04, | |
34 | REG_DPS_UIN = 0x05, | |
35 | REG_DPS_LOCK = 0x06, | |
36 | REG_DPS_PROTECT = 0x07, | |
37 | REG_DPS_CV_CC = 0x08, | |
38 | REG_DPS_ENABLE = 0x09, | |
39 | REG_DPS_BACKLIGHT = 0x0A, /* Mirror of 0x55 */ | |
40 | REG_DPS_MODEL = 0x0B, | |
41 | REG_DPS_VERSION = 0x0C, | |
42 | ||
43 | REG_DPS_PRESET = 0x23, /* Loads a preset into preset 0. */ | |
44 | ||
45 | /* | |
46 | * Add (preset * 0x10) to each of the following, for preset 1-9. | |
47 | * Preset 0 regs below are the active output settings. | |
48 | */ | |
49 | PRE_DPS_USET = 0x50, | |
50 | PRE_DPS_ISET = 0x51, | |
51 | PRE_DPS_OVPSET = 0x52, | |
52 | PRE_DPS_OCPSET = 0x53, | |
53 | PRE_DPS_OPPSET = 0x54, | |
54 | PRE_DPS_BACKLIGHT = 0x55, | |
55 | PRE_DPS_DISABLE = 0x56, /* Disable output if 0 is copied here from a preset (1 is no change). */ | |
56 | PRE_DPS_BOOT = 0x57, /* Enable output at boot if 1. */ | |
57 | }; | |
58 | #define PRE_DPS_STRIDE 0x10 | |
59 | ||
60 | enum rdtech_dps_protect_state { | |
61 | STATE_NORMAL = 0, | |
62 | STATE_OVP = 1, | |
63 | STATE_OCP = 2, | |
64 | STATE_OPP = 3, | |
65 | }; | |
66 | ||
67 | enum rdtech_dps_regulation_mode { | |
68 | MODE_CV = 0, | |
69 | MODE_CC = 1, | |
70 | }; | |
71 | ||
72 | enum rdtech_rd_register { | |
73 | REG_RD_MODEL = 0, /* u16 */ | |
74 | REG_RD_SERIAL = 1, /* u32 */ | |
75 | REG_RD_FIRMWARE = 3, /* u16 */ | |
76 | REG_RD_TEMP_INT = 4, /* 2x u16 */ | |
77 | REG_RD_TEMP_INT_F = 6, /* 2x u16 */ | |
78 | REG_RD_VOLT_TGT = 8, /* u16 */ | |
79 | REG_RD_CURR_LIM = 9, /* u16 */ | |
80 | REG_RD_VOLTAGE = 10, /* u16 */ | |
81 | REG_RD_CURRENT = 11, /* u16 */ | |
82 | REG_RD_ENERGY = 12, /* u16 */ | |
83 | REG_RD_POWER = 13, /* u16 */ | |
84 | REG_RD_VOLT_IN = 14, /* u16 */ | |
85 | REG_RD_PROTECT = 16, /* u16 */ | |
86 | REG_RD_REGULATION = 17, /* u16 */ | |
87 | REG_RD_ENABLE = 18, /* u16 */ | |
88 | /* | |
89 | * Battery at 32 == 0x20 pp: | |
90 | * Mode, voltage, temperature, capacity, energy. | |
91 | */ | |
92 | /* | |
93 | * Date/time at 48 == 0x30 pp: | |
94 | * Year, month, day, hour, minute, second. | |
95 | */ | |
96 | /* Backlight at 72 == 0x48. */ | |
97 | REG_RD_OVP_THR = 82, /* 0x52 */ | |
98 | REG_RD_OCP_THR = 83, /* 0x53 */ | |
99 | /* One "live" slot and 9 "memory" positions. */ | |
100 | REG_RD_START_MEM = 84, /* 0x54 */ | |
101 | }; | |
102 | ||
103 | /* Retries failed modbus read attempts for improved reliability. */ | |
104 | static int rdtech_dps_read_holding_registers(struct sr_modbus_dev_inst *modbus, | |
105 | int address, int nb_registers, uint16_t *registers) | |
106 | { | |
107 | size_t retries; | |
108 | int ret; | |
109 | ||
110 | retries = 3; | |
111 | while (retries--) { | |
112 | ret = sr_modbus_read_holding_registers(modbus, | |
113 | address, nb_registers, registers); | |
114 | if (ret == SR_OK) | |
115 | return ret; | |
116 | } | |
117 | ||
118 | return ret; | |
119 | } | |
120 | ||
121 | /* Set one 16bit register. LE format for DPS devices. */ | |
122 | static int rdtech_dps_set_reg(const struct sr_dev_inst *sdi, | |
123 | uint16_t address, uint16_t value) | |
124 | { | |
125 | struct dev_context *devc; | |
126 | struct sr_modbus_dev_inst *modbus; | |
127 | uint16_t registers[1]; | |
128 | int ret; | |
129 | uint8_t *wrptr; | |
130 | ||
131 | devc = sdi->priv; | |
132 | modbus = sdi->conn; | |
133 | ||
134 | wrptr = (void *)registers; | |
135 | write_u16be(wrptr, value); | |
136 | ||
137 | g_mutex_lock(&devc->rw_mutex); | |
138 | ret = sr_modbus_write_multiple_registers(modbus, address, | |
139 | ARRAY_SIZE(registers), registers); | |
140 | g_mutex_unlock(&devc->rw_mutex); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | /* Set one 16bit register. BE format for RD devices. */ | |
146 | static int rdtech_rd_set_reg(const struct sr_dev_inst *sdi, | |
147 | uint16_t address, uint16_t value) | |
148 | { | |
149 | struct dev_context *devc; | |
150 | struct sr_modbus_dev_inst *modbus; | |
151 | uint16_t registers[1]; | |
152 | int ret; | |
153 | uint8_t *wrptr; | |
154 | ||
155 | devc = sdi->priv; | |
156 | modbus = sdi->conn; | |
157 | ||
158 | wrptr = (void *)registers; | |
159 | write_u16be(wrptr, value); | |
160 | ||
161 | g_mutex_lock(&devc->rw_mutex); | |
162 | ret = sr_modbus_write_multiple_registers(modbus, address, | |
163 | ARRAY_SIZE(registers), registers); | |
164 | g_mutex_unlock(&devc->rw_mutex); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | /* Get DPS model number and firmware version from a connected device. */ | |
170 | SR_PRIV int rdtech_dps_get_model_version(struct sr_modbus_dev_inst *modbus, | |
171 | enum rdtech_dps_model_type model_type, | |
172 | uint16_t *model, uint16_t *version, uint32_t *serno) | |
173 | { | |
174 | uint16_t registers[4]; | |
175 | int ret; | |
176 | const uint8_t *rdptr; | |
177 | ||
178 | /* | |
179 | * No mutex here because when the routine executes then the | |
180 | * device instance was not created yet (probe phase). | |
181 | */ | |
182 | switch (model_type) { | |
183 | case MODEL_DPS: | |
184 | /* Get the MODEL and VERSION registers. */ | |
185 | ret = rdtech_dps_read_holding_registers(modbus, | |
186 | REG_DPS_MODEL, 2, registers); | |
187 | if (ret != SR_OK) | |
188 | return ret; | |
189 | rdptr = (void *)registers; | |
190 | *model = read_u16be_inc(&rdptr); | |
191 | *version = read_u16be_inc(&rdptr); | |
192 | *serno = 0; | |
193 | sr_info("RDTech DPS/DPH model: %u version: %u", | |
194 | *model, *version); | |
195 | return SR_OK; | |
196 | case MODEL_RD: | |
197 | /* Get the MODEL, SERIAL, and FIRMWARE registers. */ | |
198 | ret = rdtech_dps_read_holding_registers(modbus, | |
199 | REG_RD_MODEL, 4, registers); | |
200 | if (ret != SR_OK) | |
201 | return ret; | |
202 | rdptr = (void *)registers; | |
203 | *model = read_u16be_inc(&rdptr) / 10; | |
204 | *serno = read_u32be_inc(&rdptr); | |
205 | *version = read_u16be_inc(&rdptr); | |
206 | sr_info("RDTech RD model: %u version: %u, serno %u", | |
207 | *model, *version, *serno); | |
208 | return SR_OK; | |
209 | default: | |
210 | sr_err("Unexpected RDTech PSU device type. Programming error?"); | |
211 | return SR_ERR_ARG; | |
212 | } | |
213 | /* UNREACH */ | |
214 | } | |
215 | ||
216 | /* Send a measured value to the session feed. */ | |
217 | static int send_value(const struct sr_dev_inst *sdi, | |
218 | struct sr_channel *ch, float value, | |
219 | enum sr_mq mq, enum sr_mqflag mqflags, | |
220 | enum sr_unit unit, int digits) | |
221 | { | |
222 | struct sr_datafeed_packet packet; | |
223 | struct sr_datafeed_analog analog; | |
224 | struct sr_analog_encoding encoding; | |
225 | struct sr_analog_meaning meaning; | |
226 | struct sr_analog_spec spec; | |
227 | int ret; | |
228 | ||
229 | sr_analog_init(&analog, &encoding, &meaning, &spec, digits); | |
230 | analog.meaning->channels = g_slist_append(NULL, ch); | |
231 | analog.num_samples = 1; | |
232 | analog.data = &value; | |
233 | analog.meaning->mq = mq; | |
234 | analog.meaning->mqflags = mqflags; | |
235 | analog.meaning->unit = unit; | |
236 | ||
237 | packet.type = SR_DF_ANALOG; | |
238 | packet.payload = &analog; | |
239 | ret = sr_session_send(sdi, &packet); | |
240 | ||
241 | g_slist_free(analog.meaning->channels); | |
242 | ||
243 | return ret; | |
244 | } | |
245 | ||
246 | /* | |
247 | * Get the device's current state. Exhaustively, relentlessly. | |
248 | * Concentrate all details of communication in the physical transport, | |
249 | * register layout interpretation, and potential model dependency in | |
250 | * this central spot, to simplify maintenance. | |
251 | * | |
252 | * TODO Optionally limit the transfer volume depending on caller's spec | |
253 | * which detail level is desired? Is 10 registers each 16bits an issue | |
254 | * when the UART bitrate is only 9600bps? | |
255 | */ | |
256 | SR_PRIV int rdtech_dps_get_state(const struct sr_dev_inst *sdi, | |
257 | struct rdtech_dps_state *state, enum rdtech_dps_state_context reason) | |
258 | { | |
259 | struct dev_context *devc; | |
260 | struct sr_modbus_dev_inst *modbus; | |
261 | gboolean get_config, get_init_state, get_curr_meas; | |
262 | uint16_t registers[12]; | |
263 | int ret; | |
264 | const uint8_t *rdptr; | |
265 | uint16_t uset_raw, iset_raw, uout_raw, iout_raw, power_raw; | |
266 | uint16_t reg_val, reg_state, out_state, ovpset_raw, ocpset_raw; | |
267 | gboolean is_lock, is_out_enabled, is_reg_cc; | |
268 | gboolean uses_ovp, uses_ocp; | |
269 | float volt_target, curr_limit; | |
270 | float ovp_threshold, ocp_threshold; | |
271 | float curr_voltage, curr_current, curr_power; | |
272 | ||
273 | if (!sdi || !sdi->priv || !sdi->conn) | |
274 | return SR_ERR_ARG; | |
275 | devc = sdi->priv; | |
276 | modbus = sdi->conn; | |
277 | if (!state) | |
278 | return SR_ERR_ARG; | |
279 | ||
280 | /* Determine the requested level of response detail. */ | |
281 | get_config = FALSE; | |
282 | get_init_state = FALSE; | |
283 | get_curr_meas = FALSE; | |
284 | switch (reason) { | |
285 | case ST_CTX_CONFIG: | |
286 | get_config = TRUE; | |
287 | get_init_state = TRUE; | |
288 | get_curr_meas = TRUE; | |
289 | break; | |
290 | case ST_CTX_PRE_ACQ: | |
291 | get_init_state = TRUE; | |
292 | get_curr_meas = TRUE; | |
293 | break; | |
294 | case ST_CTX_IN_ACQ: | |
295 | get_curr_meas = TRUE; | |
296 | break; | |
297 | default: | |
298 | /* EMPTY */ | |
299 | break; | |
300 | } | |
301 | /* | |
302 | * TODO Make use of this information to reduce the transfer | |
303 | * volume, especially on low bitrate serial connections. Though | |
304 | * the device firmware's samplerate is probably more limiting | |
305 | * than communication bandwidth is. | |
306 | */ | |
307 | (void)get_config; | |
308 | (void)get_init_state; | |
309 | (void)get_curr_meas; | |
310 | ||
311 | switch (devc->model->model_type) { | |
312 | case MODEL_DPS: | |
313 | /* | |
314 | * Transfer a chunk of registers in a single call. It's | |
315 | * unfortunate that the model dependency and the sparse | |
316 | * register map force us to open code addresses, sizes, | |
317 | * and the sequence of the registers and how to interpret | |
318 | * their bit fields. But then this is not too unusual for | |
319 | * a hardware specific device driver ... | |
320 | */ | |
321 | g_mutex_lock(&devc->rw_mutex); | |
322 | ret = rdtech_dps_read_holding_registers(modbus, | |
323 | REG_DPS_USET, 10, registers); | |
324 | g_mutex_unlock(&devc->rw_mutex); | |
325 | if (ret != SR_OK) | |
326 | return ret; | |
327 | ||
328 | /* Interpret the registers' values. */ | |
329 | rdptr = (const void *)registers; | |
330 | uset_raw = read_u16be_inc(&rdptr); | |
331 | volt_target = uset_raw / devc->voltage_multiplier; | |
332 | iset_raw = read_u16be_inc(&rdptr); | |
333 | curr_limit = iset_raw / devc->current_multiplier; | |
334 | uout_raw = read_u16be_inc(&rdptr); | |
335 | curr_voltage = uout_raw / devc->voltage_multiplier; | |
336 | iout_raw = read_u16be_inc(&rdptr); | |
337 | curr_current = iout_raw / devc->current_multiplier; | |
338 | power_raw = read_u16be_inc(&rdptr); | |
339 | curr_power = power_raw / 100.0f; | |
340 | (void)read_u16be_inc(&rdptr); /* UIN */ | |
341 | reg_val = read_u16be_inc(&rdptr); /* LOCK */ | |
342 | is_lock = reg_val != 0; | |
343 | reg_val = read_u16be_inc(&rdptr); /* PROTECT */ | |
344 | uses_ovp = reg_val == STATE_OVP; | |
345 | uses_ocp = reg_val == STATE_OCP; | |
346 | reg_state = read_u16be_inc(&rdptr); /* CV_CC */ | |
347 | is_reg_cc = reg_state == MODE_CC; | |
348 | out_state = read_u16be_inc(&rdptr); /* ENABLE */ | |
349 | is_out_enabled = out_state != 0; | |
350 | ||
351 | /* Transfer another chunk of registers in a single call. */ | |
352 | g_mutex_lock(&devc->rw_mutex); | |
353 | ret = rdtech_dps_read_holding_registers(modbus, | |
354 | PRE_DPS_OVPSET, 2, registers); | |
355 | g_mutex_unlock(&devc->rw_mutex); | |
356 | if (ret != SR_OK) | |
357 | return ret; | |
358 | ||
359 | /* Interpret the second registers chunk's values. */ | |
360 | rdptr = (const void *)registers; | |
361 | ovpset_raw = read_u16be_inc(&rdptr); /* PRE OVPSET */ | |
362 | ovp_threshold = ovpset_raw * devc->voltage_multiplier; | |
363 | ocpset_raw = read_u16be_inc(&rdptr); /* PRE OCPSET */ | |
364 | ocp_threshold = ocpset_raw * devc->current_multiplier; | |
365 | ||
366 | break; | |
367 | ||
368 | case MODEL_RD: | |
369 | /* Retrieve a set of adjacent registers. */ | |
370 | g_mutex_lock(&devc->rw_mutex); | |
371 | ret = rdtech_dps_read_holding_registers(modbus, | |
372 | REG_RD_VOLT_TGT, 11, registers); | |
373 | g_mutex_unlock(&devc->rw_mutex); | |
374 | if (ret != SR_OK) | |
375 | return ret; | |
376 | ||
377 | /* Interpret the registers' raw content. */ | |
378 | rdptr = (const void *)registers; | |
379 | uset_raw = read_u16be_inc(&rdptr); /* USET */ | |
380 | volt_target = uset_raw / devc->voltage_multiplier; | |
381 | iset_raw = read_u16be_inc(&rdptr); /* ISET */ | |
382 | curr_limit = iset_raw / devc->current_multiplier; | |
383 | uout_raw = read_u16be_inc(&rdptr); /* UOUT */ | |
384 | curr_voltage = uout_raw / devc->voltage_multiplier; | |
385 | iout_raw = read_u16be_inc(&rdptr); /* IOUT */ | |
386 | curr_current = iout_raw / devc->current_multiplier; | |
387 | (void)read_u16be_inc(&rdptr); /* ENERGY */ | |
388 | power_raw = read_u16be_inc(&rdptr); /* POWER */ | |
389 | curr_power = power_raw / 100.0f; | |
390 | (void)read_u16be_inc(&rdptr); /* VOLT_IN */ | |
391 | (void)read_u16be_inc(&rdptr); | |
392 | reg_val = read_u16be_inc(&rdptr); /* PROTECT */ | |
393 | uses_ovp = reg_val == STATE_OVP; | |
394 | uses_ocp = reg_val == STATE_OCP; | |
395 | reg_state = read_u16be_inc(&rdptr); /* REGULATION */ | |
396 | is_reg_cc = reg_state == MODE_CC; | |
397 | out_state = read_u16be_inc(&rdptr); /* ENABLE */ | |
398 | is_out_enabled = out_state != 0; | |
399 | ||
400 | /* Retrieve a set of adjacent registers. */ | |
401 | g_mutex_lock(&devc->rw_mutex); | |
402 | ret = rdtech_dps_read_holding_registers(modbus, | |
403 | REG_RD_OVP_THR, 2, registers); | |
404 | g_mutex_unlock(&devc->rw_mutex); | |
405 | if (ret != SR_OK) | |
406 | return ret; | |
407 | ||
408 | /* Interpret the registers' raw content. */ | |
409 | rdptr = (const void *)registers; | |
410 | ovpset_raw = read_u16be_inc(&rdptr); /* OVP THR */ | |
411 | ovp_threshold = ovpset_raw / devc->voltage_multiplier; | |
412 | ocpset_raw = read_u16be_inc(&rdptr); /* OCP THR */ | |
413 | ocp_threshold = ocpset_raw / devc->current_multiplier; | |
414 | ||
415 | /* Details which we cannot query from the device. */ | |
416 | is_lock = FALSE; | |
417 | ||
418 | break; | |
419 | ||
420 | default: | |
421 | /* ShouldNotHappen(TM). Probe should have failed. */ | |
422 | return SR_ERR_ARG; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Store gathered details in the high level container. | |
427 | * | |
428 | * TODO Make use of the caller's context. The register access | |
429 | * code path above need not have gathered every detail in every | |
430 | * invocation. | |
431 | */ | |
432 | memset(state, 0, sizeof(*state)); | |
433 | state->lock = is_lock; | |
434 | state->mask |= STATE_LOCK; | |
435 | state->output_enabled = is_out_enabled; | |
436 | state->mask |= STATE_OUTPUT_ENABLED; | |
437 | state->regulation_cc = is_reg_cc; | |
438 | state->mask |= STATE_REGULATION_CC; | |
439 | state->protect_ovp = uses_ovp; | |
440 | state->mask |= STATE_PROTECT_OVP; | |
441 | state->protect_ocp = uses_ocp; | |
442 | state->mask |= STATE_PROTECT_OCP; | |
443 | state->protect_enabled = TRUE; | |
444 | state->mask |= STATE_PROTECT_ENABLED; | |
445 | state->voltage_target = volt_target; | |
446 | state->mask |= STATE_VOLTAGE_TARGET; | |
447 | state->current_limit = curr_limit; | |
448 | state->mask |= STATE_CURRENT_LIMIT; | |
449 | state->ovp_threshold = ovp_threshold; | |
450 | state->mask |= STATE_OVP_THRESHOLD; | |
451 | state->ocp_threshold = ocp_threshold; | |
452 | state->mask |= STATE_OCP_THRESHOLD; | |
453 | state->voltage = curr_voltage; | |
454 | state->mask |= STATE_VOLTAGE; | |
455 | state->current = curr_current; | |
456 | state->mask |= STATE_CURRENT; | |
457 | state->power = curr_power; | |
458 | state->mask |= STATE_POWER; | |
459 | ||
460 | return SR_OK; | |
461 | } | |
462 | ||
463 | /* Setup device's parameters. Selectively, from caller specs. */ | |
464 | SR_PRIV int rdtech_dps_set_state(const struct sr_dev_inst *sdi, | |
465 | struct rdtech_dps_state *state) | |
466 | { | |
467 | struct dev_context *devc; | |
468 | uint16_t reg_value; | |
469 | int ret; | |
470 | ||
471 | if (!sdi || !sdi->priv || !sdi->conn) | |
472 | return SR_ERR_ARG; | |
473 | devc = sdi->priv; | |
474 | if (!state) | |
475 | return SR_ERR_ARG; | |
476 | ||
477 | /* Only a subset of known values is settable. */ | |
478 | if (state->mask & STATE_OUTPUT_ENABLED) { | |
479 | reg_value = state->output_enabled ? 1 : 0; | |
480 | switch (devc->model->model_type) { | |
481 | case MODEL_DPS: | |
482 | ret = rdtech_dps_set_reg(sdi, REG_DPS_ENABLE, reg_value); | |
483 | if (ret != SR_OK) | |
484 | return ret; | |
485 | break; | |
486 | case MODEL_RD: | |
487 | ret = rdtech_rd_set_reg(sdi, REG_RD_ENABLE, reg_value); | |
488 | if (ret != SR_OK) | |
489 | return ret; | |
490 | break; | |
491 | default: | |
492 | return SR_ERR_ARG; | |
493 | } | |
494 | } | |
495 | if (state->mask & STATE_VOLTAGE_TARGET) { | |
496 | reg_value = state->voltage_target * devc->voltage_multiplier; | |
497 | switch (devc->model->model_type) { | |
498 | case MODEL_DPS: | |
499 | ret = rdtech_dps_set_reg(sdi, REG_DPS_USET, reg_value); | |
500 | if (ret != SR_OK) | |
501 | return ret; | |
502 | break; | |
503 | case MODEL_RD: | |
504 | ret = rdtech_rd_set_reg(sdi, REG_RD_VOLT_TGT, reg_value); | |
505 | if (ret != SR_OK) | |
506 | return ret; | |
507 | break; | |
508 | default: | |
509 | return SR_ERR_ARG; | |
510 | } | |
511 | } | |
512 | if (state->mask & STATE_CURRENT_LIMIT) { | |
513 | reg_value = state->current_limit * devc->current_multiplier; | |
514 | switch (devc->model->model_type) { | |
515 | case MODEL_DPS: | |
516 | ret = rdtech_dps_set_reg(sdi, REG_DPS_ISET, reg_value); | |
517 | if (ret != SR_OK) | |
518 | return ret; | |
519 | break; | |
520 | case MODEL_RD: | |
521 | ret = rdtech_rd_set_reg(sdi, REG_RD_CURR_LIM, reg_value); | |
522 | if (ret != SR_OK) | |
523 | return ret; | |
524 | break; | |
525 | default: | |
526 | return SR_ERR_ARG; | |
527 | } | |
528 | } | |
529 | if (state->mask & STATE_OVP_THRESHOLD) { | |
530 | reg_value = state->ovp_threshold * devc->voltage_multiplier; | |
531 | switch (devc->model->model_type) { | |
532 | case MODEL_DPS: | |
533 | ret = rdtech_dps_set_reg(sdi, PRE_DPS_OVPSET, reg_value); | |
534 | if (ret != SR_OK) | |
535 | return ret; | |
536 | break; | |
537 | case MODEL_RD: | |
538 | ret = rdtech_rd_set_reg(sdi, REG_RD_OVP_THR, reg_value); | |
539 | if (ret != SR_OK) | |
540 | return ret; | |
541 | break; | |
542 | default: | |
543 | return SR_ERR_ARG; | |
544 | } | |
545 | } | |
546 | if (state->mask & STATE_OCP_THRESHOLD) { | |
547 | reg_value = state->ocp_threshold * devc->current_multiplier; | |
548 | switch (devc->model->model_type) { | |
549 | case MODEL_DPS: | |
550 | ret = rdtech_dps_set_reg(sdi, PRE_DPS_OCPSET, reg_value); | |
551 | if (ret != SR_OK) | |
552 | return ret; | |
553 | break; | |
554 | case MODEL_RD: | |
555 | ret = rdtech_rd_set_reg(sdi, REG_RD_OCP_THR, reg_value); | |
556 | if (ret != SR_OK) | |
557 | return ret; | |
558 | break; | |
559 | default: | |
560 | return SR_ERR_ARG; | |
561 | } | |
562 | } | |
563 | if (state->mask & STATE_LOCK) { | |
564 | switch (devc->model->model_type) { | |
565 | case MODEL_DPS: | |
566 | reg_value = state->lock ? 1 : 0; | |
567 | ret = rdtech_dps_set_reg(sdi, REG_DPS_LOCK, reg_value); | |
568 | if (ret != SR_OK) | |
569 | return ret; | |
570 | break; | |
571 | case MODEL_RD: | |
572 | /* Do nothing, _and_ silently succeed. */ | |
573 | break; | |
574 | default: | |
575 | return SR_ERR_ARG; | |
576 | } | |
577 | } | |
578 | ||
579 | return SR_OK; | |
580 | } | |
581 | ||
582 | /* Get the current state when acquisition starts. */ | |
583 | SR_PRIV int rdtech_dps_seed_receive(const struct sr_dev_inst *sdi) | |
584 | { | |
585 | struct dev_context *devc; | |
586 | struct rdtech_dps_state state; | |
587 | int ret; | |
588 | ||
589 | if (!sdi || !sdi->priv) | |
590 | return SR_ERR_ARG; | |
591 | devc = sdi->priv; | |
592 | ||
593 | ret = rdtech_dps_get_state(sdi, &state, ST_CTX_PRE_ACQ); | |
594 | if (ret != SR_OK) | |
595 | return ret; | |
596 | ||
597 | if (state.mask & STATE_PROTECT_OVP) | |
598 | devc->curr_ovp_state = state.protect_ovp; | |
599 | if (state.mask & STATE_PROTECT_OCP) | |
600 | devc->curr_ocp_state = state.protect_ocp; | |
601 | if (state.mask & STATE_REGULATION_CC) | |
602 | devc->curr_cc_state = state.regulation_cc; | |
603 | if (state.mask & STATE_OUTPUT_ENABLED) | |
604 | devc->curr_out_state = state.output_enabled; | |
605 | ||
606 | return SR_OK; | |
607 | } | |
608 | ||
609 | /* Get measurements, track state changes during acquisition. */ | |
610 | SR_PRIV int rdtech_dps_receive_data(int fd, int revents, void *cb_data) | |
611 | { | |
612 | struct sr_dev_inst *sdi; | |
613 | struct dev_context *devc; | |
614 | struct rdtech_dps_state state; | |
615 | int ret; | |
616 | struct sr_channel *ch; | |
617 | const char *regulation_text; | |
618 | ||
619 | (void)fd; | |
620 | (void)revents; | |
621 | ||
622 | sdi = cb_data; | |
623 | if (!sdi) | |
624 | return TRUE; | |
625 | devc = sdi->priv; | |
626 | ||
627 | /* Get the device's current state. */ | |
628 | ret = rdtech_dps_get_state(sdi, &state, ST_CTX_IN_ACQ); | |
629 | if (ret != SR_OK) | |
630 | return ret; | |
631 | ||
632 | ||
633 | /* Submit measurement data to the session feed. */ | |
634 | std_session_send_df_frame_begin(sdi); | |
635 | ch = g_slist_nth_data(sdi->channels, 0); | |
636 | send_value(sdi, ch, state.voltage, | |
637 | SR_MQ_VOLTAGE, SR_MQFLAG_DC, SR_UNIT_VOLT, | |
638 | devc->model->voltage_digits); | |
639 | ch = g_slist_nth_data(sdi->channels, 1); | |
640 | send_value(sdi, ch, state.current, | |
641 | SR_MQ_CURRENT, SR_MQFLAG_DC, SR_UNIT_AMPERE, | |
642 | devc->model->current_digits); | |
643 | ch = g_slist_nth_data(sdi->channels, 2); | |
644 | send_value(sdi, ch, state.power, | |
645 | SR_MQ_POWER, 0, SR_UNIT_WATT, 2); | |
646 | std_session_send_df_frame_end(sdi); | |
647 | ||
648 | /* Check for state changes. */ | |
649 | if (devc->curr_ovp_state != state.protect_ovp) { | |
650 | (void)sr_session_send_meta(sdi, | |
651 | SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE, | |
652 | g_variant_new_boolean(state.protect_ovp)); | |
653 | devc->curr_ovp_state = state.protect_ovp; | |
654 | } | |
655 | if (devc->curr_ocp_state != state.protect_ocp) { | |
656 | (void)sr_session_send_meta(sdi, | |
657 | SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE, | |
658 | g_variant_new_boolean(state.protect_ocp)); | |
659 | devc->curr_ocp_state = state.protect_ocp; | |
660 | } | |
661 | if (devc->curr_cc_state != state.regulation_cc) { | |
662 | regulation_text = state.regulation_cc ? "CC" : "CV"; | |
663 | (void)sr_session_send_meta(sdi, SR_CONF_REGULATION, | |
664 | g_variant_new_string(regulation_text)); | |
665 | devc->curr_cc_state = state.regulation_cc; | |
666 | } | |
667 | if (devc->curr_out_state != state.output_enabled) { | |
668 | (void)sr_session_send_meta(sdi, SR_CONF_ENABLED, | |
669 | g_variant_new_boolean(state.output_enabled)); | |
670 | devc->curr_out_state = state.output_enabled; | |
671 | } | |
672 | ||
673 | /* Check optional acquisition limits. */ | |
674 | sr_sw_limits_update_samples_read(&devc->limits, 1); | |
675 | if (sr_sw_limits_check(&devc->limits)) { | |
676 | sr_dev_acquisition_stop(sdi); | |
677 | return TRUE; | |
678 | } | |
679 | ||
680 | return TRUE; | |
681 | } |