/*
* 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
+#define LOG_PREFIX "srgn"
+ //number of bytes between markers
+#define MRK_STRIDE 128
+//This must be 32 or or less since many channel enable/disable masks and other elements may be only 32 bits wide.
+//But is reduced further based on pico board limitations
+#define MAX_ANALOG_CHANNELS 3
+#define MAX_DIGITAL_CHANNELS 21
+//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;
+//TODO todo - stopped review here - renam wrptr, and review all variables
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 it's 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 buff
+ 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;
+ //Has the device, via an "!" indicated it has stopped sending data, or has a marker
+ //error been detected
+ // gboolean device_stopped;
+ 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 point 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[MAX_DIGITAL_CHANNELS/8];
+
+/* 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