ESP8266 part of the f105-motor-demo project (see f105-motor-demo_stm32)
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f105-motor-demo_esp/user/sampling.h

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