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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2016 Andreas Zschunke <andreas.zschunke@gmx.net> | |
5 | * Copyright (C) 2017 Andrej Valek <andy@skyrain.eu> | |
6 | * Copyright (C) 2017 Uwe Hermann <uwe@hermann-uwe.de> | |
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 | #include "protocol.h" | |
24 | ||
25 | #define H4032L_USB_TIMEOUT 500 | |
26 | ||
27 | enum h4032l_cmd { | |
28 | CMD_CONFIGURE = 0x2b1a, /* Also arms the logic analyzer. */ | |
29 | CMD_STATUS = 0x4b3a, | |
30 | CMD_GET = 0x6b5a | |
31 | }; | |
32 | ||
33 | struct __attribute__((__packed__)) h4032l_status_packet { | |
34 | uint32_t magic; | |
35 | uint32_t values; | |
36 | uint32_t status; | |
37 | }; | |
38 | ||
39 | SR_PRIV int h4032l_receive_data(int fd, int revents, void *cb_data) | |
40 | { | |
41 | struct timeval tv; | |
42 | struct drv_context *drvc; | |
43 | ||
44 | (void)fd; | |
45 | (void)revents; | |
46 | ||
47 | drvc = (struct drv_context *)cb_data; | |
48 | ||
49 | tv.tv_sec = tv.tv_usec = 0; | |
50 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
51 | ||
52 | return TRUE; | |
53 | } | |
54 | ||
55 | void LIBUSB_CALL h4032l_usb_callback(struct libusb_transfer *transfer) | |
56 | { | |
57 | const struct sr_dev_inst *sdi = transfer->user_data; | |
58 | struct dev_context *devc = sdi->priv; | |
59 | struct drv_context *drvc = sdi->driver->context; | |
60 | struct sr_usb_dev_inst *usb = sdi->conn; | |
61 | gboolean cmd = FALSE; | |
62 | uint32_t max_samples = 512 / sizeof(uint32_t); | |
63 | uint32_t *buffer; | |
64 | struct h4032l_status_packet *status; | |
65 | struct sr_datafeed_packet packet; | |
66 | struct sr_datafeed_logic logic; | |
67 | uint32_t number_samples; | |
68 | int ret; | |
69 | ||
70 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { | |
71 | sr_err("%s error: %d.", __func__, transfer->status); | |
72 | return; | |
73 | } | |
74 | ||
75 | buffer = (uint32_t *)transfer->buffer; | |
76 | ||
77 | switch (devc->status) { | |
78 | case H4032L_STATUS_IDLE: | |
79 | sr_err("USB callback called in idle."); | |
80 | break; | |
81 | case H4032L_STATUS_CMD_CONFIGURE: | |
82 | /* Select status request as next. */ | |
83 | cmd = TRUE; | |
84 | devc->cmd_pkt.cmd = CMD_STATUS; | |
85 | devc->status = H4032L_STATUS_CMD_STATUS; | |
86 | break; | |
87 | case H4032L_STATUS_CMD_STATUS: | |
88 | /* Select status request as next. */ | |
89 | devc->status = H4032L_STATUS_RESPONSE_STATUS; | |
90 | break; | |
91 | case H4032L_STATUS_RESPONSE_STATUS: | |
92 | /* | |
93 | * Check magic and if status is complete, then select | |
94 | * First Transfer as next. | |
95 | */ | |
96 | status = (struct h4032l_status_packet *)transfer->buffer; | |
97 | if (status->magic != H4032L_STATUS_PACKET_MAGIC) { | |
98 | devc->status = H4032L_STATUS_CMD_STATUS; | |
99 | devc->cmd_pkt.cmd = CMD_STATUS; | |
100 | cmd = TRUE; | |
101 | } else if (status->status == 2) { | |
102 | devc->status = H4032L_STATUS_RESPONSE_STATUS_CONTINUE; | |
103 | } else { | |
104 | devc->status = H4032L_STATUS_RESPONSE_STATUS_RETRY; | |
105 | } | |
106 | break; | |
107 | case H4032L_STATUS_RESPONSE_STATUS_RETRY: | |
108 | devc->status = H4032L_STATUS_CMD_STATUS; | |
109 | devc->cmd_pkt.cmd = CMD_STATUS; | |
110 | cmd = TRUE; | |
111 | break; | |
112 | case H4032L_STATUS_RESPONSE_STATUS_CONTINUE: | |
113 | devc->status = H4032L_STATUS_CMD_GET; | |
114 | devc->cmd_pkt.cmd = CMD_GET; | |
115 | cmd = TRUE; | |
116 | break; | |
117 | case H4032L_STATUS_CMD_GET: | |
118 | devc->status = H4032L_STATUS_FIRST_TRANSFER; | |
119 | break; | |
120 | case H4032L_STATUS_FIRST_TRANSFER: | |
121 | if (buffer[0] != H4032L_START_PACKET_MAGIC) { | |
122 | sr_err("Mismatch magic number of start poll."); | |
123 | devc->status = H4032L_STATUS_IDLE; | |
124 | break; | |
125 | } | |
126 | devc->status = H4032L_STATUS_TRANSFER; | |
127 | max_samples--; | |
128 | buffer++; | |
129 | break; | |
130 | case H4032L_STATUS_TRANSFER: | |
131 | number_samples = (devc->remaining_samples < max_samples) ? devc->remaining_samples : max_samples; | |
132 | devc->remaining_samples -= number_samples; | |
133 | packet.type = SR_DF_LOGIC; | |
134 | packet.payload = &logic; | |
135 | logic.length = number_samples * sizeof(uint32_t); | |
136 | logic.unitsize = sizeof(uint32_t); | |
137 | logic.data = buffer; | |
138 | sr_session_send(sdi, &packet); | |
139 | sr_dbg("Remaining: %d %08X %08X.", devc->remaining_samples, | |
140 | buffer[0], buffer[1]); | |
141 | if (devc->remaining_samples == 0) { | |
142 | std_session_send_df_end(sdi); | |
143 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
144 | devc->status = H4032L_STATUS_IDLE; | |
145 | if (buffer[number_samples] != H4032L_END_PACKET_MAGIC) | |
146 | sr_err("Mismatch magic number of end poll."); | |
147 | } | |
148 | break; | |
149 | } | |
150 | ||
151 | if (devc->status != H4032L_STATUS_IDLE) { | |
152 | if (cmd) { | |
153 | /* Setup new USB cmd packet, reuse transfer object. */ | |
154 | sr_dbg("New command: %d.", devc->status); | |
155 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
156 | 2 | LIBUSB_ENDPOINT_OUT, | |
157 | (unsigned char *)&devc->cmd_pkt, | |
158 | sizeof(struct h4032l_cmd_pkt), | |
159 | h4032l_usb_callback, (void *)sdi, | |
160 | H4032L_USB_TIMEOUT); | |
161 | } else { | |
162 | /* Setup new USB poll packet, reuse transfer object. */ | |
163 | sr_dbg("Poll: %d.", devc->status); | |
164 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
165 | 6 | LIBUSB_ENDPOINT_IN, | |
166 | devc->buffer, ARRAY_SIZE(devc->buffer), | |
167 | h4032l_usb_callback, | |
168 | (void *)sdi, H4032L_USB_TIMEOUT); | |
169 | } | |
170 | /* Send prepared USB packet. */ | |
171 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
172 | sr_err("Failed to submit transfer: %s.", | |
173 | libusb_error_name(ret)); | |
174 | devc->status = H4032L_STATUS_IDLE; | |
175 | } | |
176 | } else { | |
177 | sr_dbg("Now idle."); | |
178 | } | |
179 | ||
180 | if (devc->status == H4032L_STATUS_IDLE) | |
181 | libusb_free_transfer(transfer); | |
182 | } | |
183 | ||
184 | uint16_t h4032l_voltage2pwm(double voltage) | |
185 | { | |
186 | /* | |
187 | * word PwmA - channel A Vref PWM value, pseudocode: | |
188 | * -6V < ThresholdVoltage < +6V | |
189 | * Vref = 1.8 - ThresholdVoltage | |
190 | * if Vref > 10.0 | |
191 | * Vref = 10.0 | |
192 | * if Vref < -5.0 | |
193 | * Vref = -5.0 | |
194 | * pwm = ToInt((Vref + 5.0) / 15.0 * 4096.0) | |
195 | * if pwm > 4095 | |
196 | * pwm = 4095 | |
197 | */ | |
198 | voltage = 1.8 - voltage; | |
199 | if (voltage > 10.0) | |
200 | voltage = 10.0; | |
201 | else if (voltage < -5.0) | |
202 | voltage = -5.0; | |
203 | ||
204 | return (uint16_t) ((voltage + 5.0) * (4096.0 / 15.0)); | |
205 | } | |
206 | ||
207 | SR_PRIV int h4032l_start(const struct sr_dev_inst *sdi) | |
208 | { | |
209 | struct dev_context *devc = sdi->priv; | |
210 | struct sr_usb_dev_inst *usb = sdi->conn; | |
211 | struct libusb_transfer *transfer; | |
212 | int ret; | |
213 | ||
214 | /* Send configure command to arm the logic analyzer. */ | |
215 | devc->cmd_pkt.cmd = CMD_CONFIGURE; | |
216 | devc->status = H4032L_STATUS_CMD_CONFIGURE; | |
217 | devc->remaining_samples = devc->cmd_pkt.sample_size; | |
218 | ||
219 | transfer = libusb_alloc_transfer(0); | |
220 | ||
221 | libusb_fill_bulk_transfer(transfer, usb->devhdl, | |
222 | 2 | LIBUSB_ENDPOINT_OUT, (unsigned char *)&devc->cmd_pkt, | |
223 | sizeof(struct h4032l_cmd_pkt), h4032l_usb_callback, | |
224 | (void *)sdi, H4032L_USB_TIMEOUT); | |
225 | ||
226 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
227 | sr_err("Failed to submit transfer: %s.", libusb_error_name(ret)); | |
228 | libusb_free_transfer(transfer); | |
229 | return SR_ERR; | |
230 | } | |
231 | ||
232 | std_session_send_df_header(sdi); | |
233 | ||
234 | return SR_OK; | |
235 | } | |
236 | ||
237 | SR_PRIV int h4032l_dev_open(struct sr_dev_inst *sdi) | |
238 | { | |
239 | struct drv_context *drvc = sdi->driver->context; | |
240 | struct sr_usb_dev_inst *usb = sdi->conn; | |
241 | struct libusb_device_descriptor des; | |
242 | libusb_device **devlist; | |
243 | int ret = SR_ERR, i, device_count; | |
244 | char connection_id[64]; | |
245 | ||
246 | device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
247 | if (device_count < 0) { | |
248 | sr_err("Failed to get device list: %s.", | |
249 | libusb_error_name(device_count)); | |
250 | return SR_ERR; | |
251 | } | |
252 | ||
253 | for (i = 0; i < device_count; i++) { | |
254 | libusb_get_device_descriptor(devlist[i], &des); | |
255 | ||
256 | if (des.idVendor != H4032L_USB_VENDOR || | |
257 | des.idProduct != H4032L_USB_PRODUCT) | |
258 | continue; | |
259 | ||
260 | if ((sdi->status == SR_ST_INITIALIZING) || | |
261 | (sdi->status == SR_ST_INACTIVE)) { | |
262 | /* Check device by its physical USB bus/port address. */ | |
263 | usb_get_port_path(devlist[i], connection_id, | |
264 | sizeof(connection_id)); | |
265 | if (strcmp(sdi->connection_id, connection_id)) | |
266 | /* This is not the one. */ | |
267 | continue; | |
268 | } | |
269 | ||
270 | if (!(ret = libusb_open(devlist[i], &usb->devhdl))) { | |
271 | if (usb->address == 0xff) | |
272 | /* | |
273 | * First time we touch this device after FW | |
274 | * upload, so we don't know the address yet. | |
275 | */ | |
276 | usb->address = | |
277 | libusb_get_device_address(devlist[i]); | |
278 | } else { | |
279 | sr_err("Failed to open device: %s.", | |
280 | libusb_error_name(ret)); | |
281 | ret = SR_ERR; | |
282 | break; | |
283 | } | |
284 | ||
285 | ret = SR_OK; | |
286 | break; | |
287 | } | |
288 | ||
289 | libusb_free_device_list(devlist, 1); | |
290 | return ret; | |
291 | } |