add support for sound pressure level measurements
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258eeb77b8
commit
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31
libsigrok.h
31
libsigrok.h
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@ -173,6 +173,9 @@ enum {
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SR_MQ_POWER,
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SR_MQ_POWER,
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/** Gain (a transistor's gain, or hFE, for example). */
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/** Gain (a transistor's gain, or hFE, for example). */
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SR_MQ_GAIN,
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SR_MQ_GAIN,
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/** Logarithmic representation of sound pressure relative to a
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* reference value. */
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SR_MQ_SOUND_PRESSURE_LEVEL,
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};
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};
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/** Values for sr_datafeed_analog.unit. */
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/** Values for sr_datafeed_analog.unit. */
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@ -203,6 +206,8 @@ enum {
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* a unitless quantity, for example.
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* a unitless quantity, for example.
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*/
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*/
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SR_UNIT_UNITLESS,
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SR_UNIT_UNITLESS,
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/** Sound pressure level relative so 20 micropascals. */
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SR_UNIT_DECIBEL_SPL,
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};
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};
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/** Values for sr_datafeed_analog.flags. */
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/** Values for sr_datafeed_analog.flags. */
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@ -225,6 +230,30 @@ enum {
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SR_MQFLAG_AUTORANGE = 0x80,
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SR_MQFLAG_AUTORANGE = 0x80,
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/** Device is in relative mode. */
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/** Device is in relative mode. */
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SR_MQFLAG_RELATIVE = 0x100,
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SR_MQFLAG_RELATIVE = 0x100,
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/** Sound pressure level is A-weighted in the frequency domain,
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* according to IRC 61672:2003. */
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SR_MQFLAG_SPL_FREQ_WEIGHT_A = 0x200,
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/** Sound pressure level is C-weighted in the frequency domain,
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* according to IRC 61672:2003. */
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SR_MQFLAG_SPL_FREQ_WEIGHT_C = 0x400,
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/** Sound pressure level is Z-weighted (i.e. not at all) in the
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* frequency domain, according to IRC 61672:2003. */
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SR_MQFLAG_SPL_FREQ_WEIGHT_Z = 0x800,
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/** Sound pressure level is not weighted in the frequency domain,
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* albeit without standards-defined low and high frequency limits. */
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SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT = 0x1000,
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/** Sound pressure level measurement is S-weighted (1s) in the
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* time domain. */
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SR_MQFLAG_SPL_TIME_WEIGHT_S = 0x2000,
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/** Sound pressure level measurement is F-weighted (125ms) in the
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* time domain. */
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SR_MQFLAG_SPL_TIME_WEIGHT_F = 0x4000,
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/** Sound pressure level is time-averaged (LAT), also known as
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* Equivalent Continuous A-weighted Sound Level (LEQ). */
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SR_MQFLAG_SPL_LAT = 0x8000,
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/** Sound pressure level represented as a percentage of measurements
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* that were over a preset alarm level. */
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SR_MQFLAG_SPL_PCT_OVER_ALARM = 0x10000,
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};
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};
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struct sr_context;
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struct sr_context;
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@ -400,6 +429,8 @@ enum {
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/** The device is a demo device. */
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/** The device is a demo device. */
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SR_HWCAP_DEMO_DEV,
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SR_HWCAP_DEMO_DEV,
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/** The device can act as a sound level meter. */
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SR_HWCAP_SOUNDLEVELMETER,
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/*--- Device configuration ------------------------------------------*/
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/*--- Device configuration ------------------------------------------*/
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