/*
* This file is part of the libsigrok project.
*
- * Copyright (C) 2022
AC0BI <ac0bi00@gmail.com>
+ * Copyright (C) 2022
Shawn Walker <ac0bi00@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
-#define LOG_PREFIX "raspberrypi-pico"
+/* This is used by sr_dbg/log etc to indicate where a printout came from */
+#define LOG_PREFIX "srpico"
+
+/* Number of bytes between markers */
+#define MRK_STRIDE 128
+
+/* These must be 32 or or less since many channel enable/disable masks and other
+ * elements may be only 32 bits wide. Setting values larger than what a PICO can
+ * support to enable other devices, or possibly modes where channels are created
+ * from internal values rather than external pins */
+#define MAX_ANALOG_CHANNELS 8
+#define MAX_DIGITAL_CHANNELS 32
+
+/* Digits input to sr_analog_init */
+#define ANALOG_DIGITS 4
+
+SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str);
+SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch);
+int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str,
+ char *resp, size_t cnt);
+SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str);
+
+typedef enum rxstate {
+ RX_IDLE = 0, /* Not receiving */
+ RX_ACTIVE = 1, /* Receiving data */
+ RX_STOPPED = 2, /* Received stop marker, waiting for byte cnt */
+ RX_ABORT = 3, /* Received aborted marker or other error */
+} rxstate_t;
struct dev_context {
+ /* Configuration Parameters
+ * It is up to the user to understand sample rates and serial download speed
+ * etc and do the right thing. i.e. don't expect continuous streaming
+ * bandwidth greater than serial link speed etc... */
+ /* The number of samples the user expects to see. */
+ uint64_t limit_samples;
+ uint64_t sample_rate;
+ /* Number of samples that have been received and processed */
+ uint32_t num_samples;
+ /* Initial Number of analog and digital channels.
+ * This is set by initial device config. Channels can be disabled/enabled,
+ * but can not be added/removed once driver is loaded. */
+ uint16_t num_a_channels;
+ uint16_t num_d_channels;
+ /* Masks of enabled channels based on user input */
+ uint32_t a_chan_mask;
+ uint32_t d_chan_mask;
+ /* Channel groups - each analog channel is its own group */
+ struct sr_channel_group **analog_groups;
+ struct sr_channel_group *digital_group;
+ /* Data size in bytes for each analog channel in bytes must be 1 as only
+ * single byte samples are supported in this version */
+ uint8_t a_size;
+ /* Offset and scale for each analog channel to covert bytes to float */
+ float a_offset[MAX_ANALOG_CHANNELS];
+ float a_scale[MAX_ANALOG_CHANNELS];
+ /* % ratio of pre-trigger to post trigger samples */
+ uint64_t capture_ratio;
+ /* Total number of bytes of data sent for one sample across all channels */
+ uint16_t bytes_per_slice;
+ /* The number of bytes needed to store all channels for one sample in the
+ * device data buffer */
+ uint32_t dig_sample_bytes;
+
+ /* Tracking/status once started */
+ /* Number of bytes in the current serial input stream */
+ uint32_t bytes_avail;
+ /* Samples sent to the session */
+ uint32_t sent_samples;
+ /* count total received bytes to detect lost info */
+ uint64_t byte_cnt;
+ /* For SW-based triggering we put the device into continuous transmit and
+ * stop when we detect a sample and capture all the samples we need.
+ * trigger_fired is thus set when the sw trigger logic detects a trigger.
+ * For non triggered modes we send a start and a number of samples and the
+ * device transmits that much. trigger_fired is set immediately at the
+ * start. */
+ gboolean trigger_fired;
+ rxstate_t rxstate;
+
+ /* Serial Related */
+ /* Serial data buffer */
+ unsigned char *buffer;
+ /* Size of incoming serial buffer*/
+ uint32_t serial_buffer_size;
+ /* Current byte in serial read stream that is being processed */
+ uint32_t ser_rdptr;
+ /* Write pointer into the serial input buffer */
+ uint32_t wrptr;
+
+ /* Buffering Related */
+ /* Parsed serial read data is split into each channels dedicated buffer
+ * for analog */
+ float *a_data_bufs[MAX_ANALOG_CHANNELS];
+ /* Digital samples are stored packed together since cli/pulseview want it
+ * that way */
+ uint8_t *d_data_buf;
+ /* Write pointer for the the per channel data buffers */
+ uint32_t cbuf_wrptr;
+ /* Size of packet data buffers for each channel */
+ uint32_t sample_buf_size;
+
+ /* RLE related*/
+ /* Previous sample values to duplicate for rle */
+ float a_last[MAX_ANALOG_CHANNELS];
+ uint8_t d_last[4];
+
+ /* SW trigger related */
+ struct soft_trigger_logic *stl;
+ /* Maximum number of entries to store pre-trigger */
+ uint32_t pretrig_entries;
+ /* Analog pre-trigger storage for software based triggering
+ * because sw based only has internal storage for logic */
+ float *a_pretrig_bufs[MAX_ANALOG_CHANNELS];
+ uint32_t pretrig_wr_ptr;
};
-SR_PRIV int raspberrypi_pico_receive_data(int fd, int revents, void *cb_data);
+SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data);
+SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi);
+
+void process_D4(struct sr_dev_inst *sdi, struct dev_context *d);
+void process_slice(struct sr_dev_inst *sdi, struct dev_context *devc);
+
+int send_analog(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples, uint32_t offset);
+int send_analog_ring(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples);
+
+int process_group(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_slices);
+void rle_memset(struct dev_context *devc, uint32_t num_slices);
+SR_PRIV int check_marker(struct dev_context *d, int *len);
+
#endif
projects / libsigrok.git / blobdiff