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44 lines
1.1 KiB
44 lines
1.1 KiB
#ifndef SAMPLING_H
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#define SAMPLING_H
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#include <esp8266.h>
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#include <httpd.h>
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/**
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* Reading procedure
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* -----------------
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*
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* 1. meas_request_data(count)
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* 2. wait for meas_chunk_ready() == true
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* 3. meas_get_chunk() to read the chunk last received
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* 4. if meas_is_last_chunk(), call meas_close() and DONE.
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* 5. meas_request_next_chunk() to get more data, goto 2
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*
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* Waiting should have a timeout, if data not received, return error status to client.
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*/
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/** Request data from the sampling module. Count - number of samples. */
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bool meas_request_data(uint16_t count, uint32_t freq); // TODO specify what kind of data - currently direct samples.
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/** request next chunk */
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void meas_request_next_chunk(void);
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/** Check if chunk ready to be read */
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bool meas_chunk_ready(void);
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/**
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* @brief Get received chunk. NULL if none.
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*
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* The array is valid until next chunk is requested.
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* Chunk length in bytes is stored in the argument.
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*/
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uint8_t *meas_get_chunk(uint16_t *chunk_len);
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/** Check if this was the last chunk */
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bool meas_is_last_chunk(void);
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/** Terminate the readout. */
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void meas_close(void);
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#endif // SAMPLING_H
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