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1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
bac2a8b8 | 4 | * Copyright (C) 2022 Shawn Walker <ac0bi00@gmail.com> |
dc90146e A |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef LIBSIGROK_HARDWARE_RASPBERRYPI_PICO_PROTOCOL_H | |
21 | #define LIBSIGROK_HARDWARE_RASPBERRYPI_PICO_PROTOCOL_H | |
22 | ||
23 | #include <stdint.h> | |
24 | #include <glib.h> | |
25 | #include <libsigrok/libsigrok.h> | |
26 | #include "libsigrok-internal.h" | |
27 | ||
bac2a8b8 A |
28 | //This is used by sr_dbg/log etc |
29 | #define LOG_PREFIX "srgn" | |
30 | //number of bytes between markers | |
31 | #define MRK_STRIDE 128 | |
dc90146e | 32 | |
bac2a8b8 A |
33 | //This must be 32 or or less since many channel enable/disable masks and other elements may be only 32 bits wide. |
34 | //But is reduced further based on pico board limitations | |
35 | #define MAX_ANALOG_CHANNELS 3 | |
36 | #define MAX_DIGITAL_CHANNELS 21 | |
37 | //digits input to sr_analog_init | |
38 | #define ANALOG_DIGITS 4 | |
39 | ||
40 | SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str); | |
41 | SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch); | |
42 | int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str,char *resp,size_t cnt); | |
43 | SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str); | |
44 | ||
45 | typedef enum rxstate { | |
46 | RX_IDLE=0,//not receiving | |
47 | RX_ACTIVE=1, //receiving data | |
48 | RX_STOPPED=2, //received stop marker, waiting for byte cnt | |
49 | RX_ABORT=3, //received aborted marker or other error | |
50 | }rxstate_t; | |
51 | //TODO todo - stopped review here - renam wrptr, and review all variables | |
dc90146e | 52 | struct dev_context { |
bac2a8b8 A |
53 | /*Configuration Parameters */ |
54 | //It is up to the user to understand sample rates and serial download speed etc and | |
55 | // do the right thing. i.e. don't expect continuous streaming bandwidth greater | |
56 | //than serial link speed etc... | |
57 | //The number of samples the user expects to see. | |
58 | uint64_t limit_samples; | |
59 | uint64_t sample_rate; | |
60 | //Number of samples that have been received and processed | |
61 | uint32_t num_samples; | |
62 | //Initial Number of analog and digital channels. | |
63 | //This is set by initial device config. Channels can be disabled/enabled, | |
64 | //but can not be added/removed once driver is loaded. | |
65 | uint16_t num_a_channels; | |
66 | uint16_t num_d_channels; | |
67 | //Masks of enabled channels based on user input | |
68 | uint32_t a_chan_mask; | |
69 | uint32_t d_chan_mask; | |
70 | // Channel groups -each analog channel is it's own group | |
71 | struct sr_channel_group **analog_groups; | |
72 | struct sr_channel_group *digital_group; | |
73 | //Data size in bytes for each analog channel in bytes | |
74 | //must be 1 as only single byte samples are supported in this version | |
75 | uint8_t a_size; | |
76 | //Offset and scale for each analog channel to covert bytes to float | |
77 | float a_offset[MAX_ANALOG_CHANNELS]; | |
78 | float a_scale[MAX_ANALOG_CHANNELS]; | |
79 | // % ratio of pre-trigger to post trigger samples | |
80 | uint64_t capture_ratio; | |
81 | // total number of bytes of data sent for one sample across all channels | |
82 | uint16_t bytes_per_slice; | |
83 | //The number of bytes needed to store all channels for one sample in the device data buff | |
84 | uint32_t dig_sample_bytes; | |
85 | /* Tracking/status once started */ | |
86 | //number of bytes in the current serial input stream | |
87 | uint32_t bytes_avail; | |
88 | //Samples sent to the session */ | |
89 | uint32_t sent_samples; | |
90 | //count total received bytes to detect lost info*/ | |
91 | uint64_t byte_cnt; | |
92 | //For SW based triggering we put the device into continuous transmit and stop when | |
93 | // we detect a sample and capture all the samples we need. trigger_fired is thus set when | |
94 | // the sw trigger logic detects a trigger. | |
95 | //For non triggered modes we send a start and a number of samples and the device | |
96 | //transmits that much. trigger_fired is set immediately at the start. | |
97 | gboolean trigger_fired; | |
98 | //Has the device, via an "!" indicated it has stopped sending data, or has a marker | |
99 | //error been detected | |
100 | // gboolean device_stopped; | |
101 | rxstate_t rxstate; | |
102 | /* Serial Related */ | |
103 | // Serial data buffer | |
104 | unsigned char *buffer; | |
105 | //Size of incoming serial buffer | |
106 | uint32_t serial_buffer_size; | |
107 | //Current byte in serial read stream that is being processed | |
108 | uint32_t ser_rdptr; | |
109 | //write pointer into the serial input buffer | |
110 | uint32_t wrptr; | |
111 | ||
112 | /* Buffering Related */ | |
113 | /* parsed serial read data is split into each channels dedicated buffer for analog*/ | |
114 | float *a_data_bufs[MAX_ANALOG_CHANNELS]; | |
115 | /*digital samples are stored packed together since cli/pulseview want it that way*/ | |
116 | uint8_t *d_data_buf; | |
117 | /*write point for the the per channel data buffers*/ | |
118 | uint32_t cbuf_wrptr; | |
119 | /*size of packet data buffers for each channel*/ | |
120 | uint32_t sample_buf_size; | |
121 | /* RLE related*/ | |
122 | /*Previous sample values to duplicate for rle */ | |
123 | float a_last[MAX_ANALOG_CHANNELS]; | |
124 | uint8_t d_last[MAX_DIGITAL_CHANNELS/8]; | |
125 | ||
126 | /* SW Trigger Related */ | |
127 | struct soft_trigger_logic *stl; | |
128 | //Maximum number of entries to store pre-trigger | |
129 | uint32_t pretrig_entries; | |
130 | /* Analog pre-trigger storage for software based triggering | |
131 | because sw based only has internal storage for logic*/ | |
132 | float *a_pretrig_bufs[MAX_ANALOG_CHANNELS]; | |
133 | uint32_t pretrig_wr_ptr; | |
134 | ||
dc90146e A |
135 | }; |
136 | ||
bac2a8b8 A |
137 | SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data); |
138 | SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi); | |
139 | ||
140 | void process_D4(struct sr_dev_inst *sdi,struct dev_context *d); | |
141 | void process_slice(struct sr_dev_inst *sdi,struct dev_context *devc); | |
142 | ||
143 | int send_analog(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_samples, uint32_t offset); | |
144 | int send_analog_ring(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_samples); | |
145 | ||
146 | int process_group(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_slices); | |
147 | void rle_memset(struct dev_context *devc,uint32_t num_slices); | |
148 | SR_PRIV int check_marker(struct dev_context *d,int *len); | |
149 | ||
150 | ||
dc90146e A |
151 | |
152 | #endif |