- 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;