This is the basic structure of the message:

{START BYTE, FUNCTION BYTE, PARAMETER BYTE, VALUE BYTE}

This UART command below sets control parameter N to value V:

{0xff (START), 0xfe (SEND TO PARAMETER), parameter N (PARAMETER INDEX), value V (INTEGER VALUE)}

{0xff, 0xfc, parameter N} — Return the current value of parameter N via UART or Nuvoton Bridge connection.

{0xff, 0xf9} — bypasses DPS

{0xff, 0xf8} — enables DPS

{0xff, 0xf7} — bypasses stereo widening

{0xff, 0xf6} — enables stereo widening

{0xff, 0xfa, preset #N} — loads preset (DPS Profile) #N (N = 0, 1, 2, 3, 4…} from indices.c embedded in the ARM firmware.

Pull All Parameter Data

{0xff, 0xfb} — Returns the value of every parameter, in order, terminated by 0xff.  

This is sent during the initial connection with the DPS Profile Creator.  If a proper series of bytes is received, the serial connection is considered successful.  If the proper bytes are not received a connection error is reported.  The connection must then be re-established in the DPS Profile Creator.

Value Indexes

An index is sent for functions that take a value (for example gain, frequency, and Q for an EQ band). Use the link below to reference all value indexes:

Indexes and Ranges

The parameter list below represents the values in the indices.c preset arrays. Only User Controls are not included in the presets.

Parameter List

PARAMETER	INDEX	HEX	Values
General DPS Parameters
ParamIdxInputHpf,	0	0	20-255Hz
ParamIdxInputGain,	1	1	Cal Gain
ParamIdxShelf1Gain,	2	2	EQ Gain
ParamIdxShelf2Gain,	3	3	EQ Gain
ParamIdxAgc1Thresh,	4	4	Threshold
ParamIdxAgc1Ratio,	5	5	Ratio
ParamIdxAgc1Attack,	6	6	Other
ParamIdxAgc1Release,	7	7	Other
ParamIdxAgc1Makeup,	8	8	Cal Gain
ParamIdxShelf3Gain,	9	9	EQ Gain
ParamIdxShelf4Gain,	10	A	EQ Gain
ParamIdxBellF1Gain,	11	B	EQ Gain
ParamIdxBellF1Q,	12	C	EQ Table
ParamIdxBellF1Freq,	13	D	EQ Table
ParamIdxBellF2Gain,	14	E	EQ Table
ParamIdxBellF2Q,	15	F	EQ Table
ParamIdxBellF2Freq,	16	10	EQ Table
ParamIdxBellF3Gain,	17	11	EQ Table
ParamIdxBellF3Q,	18	12	EQ Table
ParamIdxBellF3Freq,	19	13	EQ Table
ParamIdxBellF4Gain,	20	14	EQ Table
ParamIdxBellF4Q,	21	15	EQ Table
ParamIdxBellF4Freq,	22	16	EQ Table
ParamIdxBellF5Gain,	23	17	EQ Table
ParamIdxBellF5Q,	24	18	EQ Table
ParamIdxBellF5Freq,	25	19	EQ Table
ParamIdxBellF6Gain,	26	1A	EQ Table
ParamIdxBellF6Q,	27	1B	EQ Table
ParamIdxBellF6Freq,	28	1C	EQ Table
ParamIdxBellF7Gain,	29	1D	EQ Table
ParamIdxBellF7Q,	30	1E	EQ Table
ParamIdxBellF7Freq,	31	1F	EQ Table
ParamIdxBellF8Gain,	32	20	EQ Table
ParamIdxBellF8Q,	33	21	EQ Table
ParamIdxBellF8Freq,	34	22	EQ Table
ParamIdxBellF9Gain,	35	23	EQ Table
ParamIdxBellF9Q,	36	24	EQ Table
ParamIdxBellF9Freq,	37	25	EQ Table
ParamIdxBellF10Gain,	38	26	EQ Table
ParamIdxBellF10Q,	39	27	EQ Table
ParamIdxBellF10Freq,	40	28	EQ Table
ParamIdxAgcXoverFreq,	41	29	EQ Table
ParamIdxAgc2Thresh,	42	2A	Other
ParamIdxAgc2Ratio,	43	2B	Ratio
ParamIdxAgc2Attack,	44	2C	Other
ParamIdxAgc2Release,	45	2D	Other
ParamIdxAgc2Makeup,	46	2E	Cal Gain
ParamIdxAgc3Thresh,	47	2F	Other
ParamIdxAgc3Ratio,	48	30	Ratio
ParamIdxAgc3Attack,	49	31	Other
ParamIdxAgc3Release,	50	32	Other
ParamIdxAgc3Makeup,	51	33	Cal Gain
ParamIdxOutputGain,	52	34	Cal Gain
ParamIdxInputHpfBypass,	53	35	BOOL
ParamIdxBellF1Bypass,	54	36	BOOL
ParamIdxBellF2Bypass,	55	37	BOOL
ParamIdxBellF3Bypass,	56	38	BOOL
ParamIdxBellF4Bypass,	57	39	BOOL
ParamIdxBellF5Bypass,	58	3A	BOOL
ParamIdxBellF6Bypass,	59	3B	BOOL
ParamIdxBellF7Bypass,	60	3C	BOOL
ParamIdxBellF8Bypass,	61	3D	BOOL
ParamIdxBellF9Bypass,	62	3E	BOOL
ParamIdxBellF10Bypass,	63	3F	BOOL
ParamIdxAgcMultibandBypass,	64	40	BOOL
ParamIdxAgcMidbandBypass,	65	41	BOOL
ParamIdxAgcHighbandBypass,	66	42	BOOL
ParamIdxUserEqPosition,	67	43	BOOL
ParamIdxSwXoverFreq,	68	44	EQ Table
ParamIdxSwLowShelfFreq,	69	45	EQ Table
ParamIdxSwHighShelfFreq,	70	46	EQ Table
ParamIdxSwAgcThresh,	71	47	Other
ParamIdxSwAgcRatio,	72	48	Ratio
ParamIdxSwAgcAttack,	73	49	Other
ParamIdxSwAgcRelease,	74	4A	Other
ParamIdxSwAgcMakeup,	75	4B	Cal Gain
ParamIdxSwMGain,	76	4C	EQ Gain
ParamIdxSwSGain,	77	4D	EQ Gain
ParamIdxSwLowGain,	78	4E	EQ Gain
ParamIdxSwHighGain,	79	4F	EQ Gain
ParamIdxNoisegateRelease,	80	50	Other
ParamIdxNoisegateHysteresis,	81	51	Other
ParamIdxNoisegateFloor,	82	52	Other
ParamIdxNoisegateHold,	83	53	Other
ParamIdxNoisegateThresh,	84	54	Other
Virtual Subwoofer
ParamIdxVirtualBassBypass	85	55	BOOL
ParamIdxVirtualBassRecLevel	86	56	Other
ParamIdxVirtualBassThreshold	87	57	Other
ParamIdxVirtualBassLevelTarget	88	58	Other
ParamIdxVirtualBassMaxBoost	89	59	Other
ParamIdxVirtualBassResponseTime	90	5A	0-100
ParamIdxZFiltQ	91	5B	EQ Table
ParamIdxZFiltFreq	92	5C	EQ Table
Signal Flow
ParamIdxSignalFlowMode	93	5D	0-3
ParamIdxBongioviAgcMode	94	5E	BOOL
ParamIdxAgcXoverMidFreq	95	5F	EQ Table
ParamIdxHighAgcMode	96	60	BOOL
AGC Parameters
ParamIdxAgc1ReleaseMode	97	61	NA
ParamIdxAgc1LogScale	98	62	NA
ParamIdxAgc1LookAhead	99	63	NA
ParamIdxAgc2ReleaseMode	100	64	NA
ParamIdxAgc2LogScale	101	65	NA
ParamIdxAgc2LookAhead	102	66	NA
ParamIdxAgc3ReleaseMode	103	67	NA
ParamIdxAgc3LogScale	104	68	NA
ParamIdxAgc3LookAhead	105	69	NA
ParamIdxAgcSwReleaseMode	106	6A	NA
ParamIdxAgcSwLogScale	107	6B	NA
ParamIdxAgcSwLookAhead	108	6C	NA
ParamIdxStereoEnhancementBypass	109	6D	BOOL
ParamIdxNoiseGateBypass	110	6E	BOOL
ParamIdxLimiterBypass	111	6F	BOOL
ParamIdxLimiterInputGain	112	70	Other
ParamIdxLimiterThreshold	113	71	Other
ParamIdxLimiterCeiling	114	72	Other
ParamIdxLimiterRelease	115	73	Other
User Control – not included in indices.c
ParamIdxUserGain,	150	96	UserGain
ParamIdxUserEqBassGain,	151	97	EQ Table
ParamIdxUserEqBassQ,	152	98	EQ Table
ParamIdxUserEqBassFc,	153	99	EQ Table
ParamIdxUserEqTrebleGain,	154	9A	EQ Table
ParamIdxUserEqTrebleQ,	155	9B	EQ Table
ParamIdxUserEqTrebleFc,	156	9C	EQ Table
ParamIdxUserEqBypass,	157	9D	BOOL
V3D Headphone Effect
ParamIdxV3DMode	159	9F	0-6
ParamIdxV3DBypass	160	74	BOOL

Audio Meters

Meter data for AGC gain change and input/output levels is returned as a series of 13 bytes.

Index	Meter	Range
0	BAGC Gain Modulation Left	-40dB to 0dB Calibration Gain Index
1	BAGC Gain Modulation Right	-40dB to 0dB Calibration Gain Index
2	Low AGC Gain Modulation Left	-40dB to 0dB Calibration Gain Index
3	Low AGC Gain Modulation Right	-40dB to 0dB Calibration Gain Index
4	High AGC Gain Modulation Left	-40dB to 0dB Calibration Gain Index
5	High AGC Gain Modulation Right	-40dB to 0dB Calibration Gain Index
6	Output Level Left	-40dB to +25dBdB Calibration Gain Index
7	Output Level Right	-40dB to +25dBdB Calibration Gain Index
8	Input Level Left	-40dB to +25dBdB Calibration Gain Index
9	Input Level Right	-40dB to +25dBdB Calibration Gain Index
10	Dynamic Stereo Widening Gain Modulation	-40dB to 0dB Calibration Gain Index
11	Virtual Subwoofer Boost Level	0dB to +25dBdB Calibration Gain Index
12	Subwoofer Output Level	-40dB to +25dB Calibration Gain Index