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dc90146e A |
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 | ||
1296bb53 | 28 | /* This is used by sr_dbg/log etc to indicate where a printout came from */ |
b9890a32 | 29 | #define LOG_PREFIX "srpico" |
1296bb53 SA |
30 | |
31 | /* Number of bytes between markers */ | |
bac2a8b8 | 32 | #define MRK_STRIDE 128 |
dc90146e | 33 | |
1296bb53 SA |
34 | /* These must be 32 or or less since many channel enable/disable masks and other |
35 | * elements may be only 32 bits wide. Setting values larger than what a PICO can | |
36 | * support to enable other devices, or possibly modes where channels are created | |
37 | * from internal values rather than external pins */ | |
b9890a32 A |
38 | #define MAX_ANALOG_CHANNELS 8 |
39 | #define MAX_DIGITAL_CHANNELS 32 | |
1296bb53 SA |
40 | |
41 | /* Digits input to sr_analog_init */ | |
bac2a8b8 A |
42 | #define ANALOG_DIGITS 4 |
43 | ||
44 | SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str); | |
45 | SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch); | |
ac132f83 | 46 | int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str, |
1296bb53 SA |
47 | char *resp, size_t cnt); |
48 | SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str); | |
bac2a8b8 A |
49 | |
50 | typedef enum rxstate { | |
1296bb53 SA |
51 | RX_IDLE = 0, /* Not receiving */ |
52 | RX_ACTIVE = 1, /* Receiving data */ | |
53 | RX_STOPPED = 2, /* Received stop marker, waiting for byte cnt */ | |
54 | RX_ABORT = 3, /* Received aborted marker or other error */ | |
ac132f83 | 55 | } rxstate_t; |
bac2a8b8 | 56 | |
1296bb53 SA |
57 | struct dev_context { |
58 | /* Configuration Parameters | |
59 | * It is up to the user to understand sample rates and serial download speed | |
60 | * etc and do the right thing. i.e. don't expect continuous streaming | |
61 | * bandwidth greater than serial link speed etc... */ | |
62 | /* The number of samples the user expects to see. */ | |
63 | uint64_t limit_samples; | |
64 | uint64_t sample_rate; | |
65 | /* Number of samples that have been received and processed */ | |
66 | uint32_t num_samples; | |
67 | /* Initial Number of analog and digital channels. | |
68 | * This is set by initial device config. Channels can be disabled/enabled, | |
69 | * but can not be added/removed once driver is loaded. */ | |
70 | uint16_t num_a_channels; | |
71 | uint16_t num_d_channels; | |
72 | /* Masks of enabled channels based on user input */ | |
73 | uint32_t a_chan_mask; | |
74 | uint32_t d_chan_mask; | |
75 | /* Channel groups - each analog channel is its own group */ | |
76 | struct sr_channel_group **analog_groups; | |
77 | struct sr_channel_group *digital_group; | |
78 | /* Data size in bytes for each analog channel in bytes must be 1 as only | |
79 | * single byte samples are supported in this version */ | |
80 | uint8_t a_size; | |
81 | /* Offset and scale for each analog channel to covert bytes to float */ | |
82 | float a_offset[MAX_ANALOG_CHANNELS]; | |
83 | float a_scale[MAX_ANALOG_CHANNELS]; | |
84 | /* % ratio of pre-trigger to post trigger samples */ | |
85 | uint64_t capture_ratio; | |
86 | /* Total number of bytes of data sent for one sample across all channels */ | |
87 | uint16_t bytes_per_slice; | |
88 | /* The number of bytes needed to store all channels for one sample in the | |
89 | * device data buffer */ | |
90 | uint32_t dig_sample_bytes; | |
91 | ||
92 | /* Tracking/status once started */ | |
93 | /* Number of bytes in the current serial input stream */ | |
94 | uint32_t bytes_avail; | |
95 | /* Samples sent to the session */ | |
96 | uint32_t sent_samples; | |
97 | /* count total received bytes to detect lost info */ | |
98 | uint64_t byte_cnt; | |
99 | /* For SW-based triggering we put the device into continuous transmit and | |
100 | * stop when we detect a sample and capture all the samples we need. | |
101 | * trigger_fired is thus set when the sw trigger logic detects a trigger. | |
102 | * For non triggered modes we send a start and a number of samples and the | |
103 | * device transmits that much. trigger_fired is set immediately at the | |
104 | * start. */ | |
105 | gboolean trigger_fired; | |
106 | rxstate_t rxstate; | |
107 | ||
108 | /* Serial Related */ | |
109 | /* Serial data buffer */ | |
110 | unsigned char *buffer; | |
111 | /* Size of incoming serial buffer*/ | |
112 | uint32_t serial_buffer_size; | |
113 | /* Current byte in serial read stream that is being processed */ | |
114 | uint32_t ser_rdptr; | |
115 | /* Write pointer into the serial input buffer */ | |
116 | uint32_t wrptr; | |
117 | ||
118 | /* Buffering Related */ | |
119 | /* Parsed serial read data is split into each channels dedicated buffer | |
120 | * for analog */ | |
121 | float *a_data_bufs[MAX_ANALOG_CHANNELS]; | |
122 | /* Digital samples are stored packed together since cli/pulseview want it | |
123 | * that way */ | |
124 | uint8_t *d_data_buf; | |
125 | /* Write pointer for the the per channel data buffers */ | |
126 | uint32_t cbuf_wrptr; | |
127 | /* Size of packet data buffers for each channel */ | |
128 | uint32_t sample_buf_size; | |
129 | ||
130 | /* RLE related*/ | |
131 | /* Previous sample values to duplicate for rle */ | |
132 | float a_last[MAX_ANALOG_CHANNELS]; | |
133 | uint8_t d_last[4]; | |
134 | ||
135 | /* SW trigger related */ | |
136 | struct soft_trigger_logic *stl; | |
137 | /* Maximum number of entries to store pre-trigger */ | |
138 | uint32_t pretrig_entries; | |
139 | /* Analog pre-trigger storage for software based triggering | |
140 | * because sw based only has internal storage for logic */ | |
141 | float *a_pretrig_bufs[MAX_ANALOG_CHANNELS]; | |
142 | uint32_t pretrig_wr_ptr; | |
dc90146e A |
143 | }; |
144 | ||
bac2a8b8 A |
145 | SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data); |
146 | SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi); | |
147 | ||
ac132f83 A |
148 | void process_D4(struct sr_dev_inst *sdi, struct dev_context *d); |
149 | void process_slice(struct sr_dev_inst *sdi, struct dev_context *devc); | |
bac2a8b8 | 150 | |
ac132f83 | 151 | int send_analog(struct sr_dev_inst *sdi, struct dev_context *devc, |
1296bb53 | 152 | uint32_t num_samples, uint32_t offset); |
ac132f83 | 153 | int send_analog_ring(struct sr_dev_inst *sdi, struct dev_context *devc, |
1296bb53 | 154 | uint32_t num_samples); |
bac2a8b8 | 155 | |
ac132f83 | 156 | int process_group(struct sr_dev_inst *sdi, struct dev_context *devc, |
1296bb53 | 157 | uint32_t num_slices); |
ac132f83 A |
158 | void rle_memset(struct dev_context *devc, uint32_t num_slices); |
159 | SR_PRIV int check_marker(struct dev_context *d, int *len); | |
bac2a8b8 A |
160 | |
161 | ||
dc90146e | 162 | #endif |