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13.3.13 data : Parameter Data

Individual Parameter Transfer

Format: index0 0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)

index1 0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)

index2 0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)

: :

indexN 0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)

Parameter data indicates the parameter value. Data is repeatedly placed in an array of the size equiv-

alent to len+1. For the structure of one data item, the length depends on the data bit width(Parameter

List Size), as shown below.

Size Number of Data

1 - 7 1

8 - 14 2

15 - 21 3

22 - 28 4

29 - 32 5

Each block of data is packed from the lowest order byte ﬁrst. In the case of multiple-byte data, the

lowest weighted bit is the least signiﬁcant digit of the ﬁrst data byte, and the highest weighted bit is

the most signiﬁcant digit of the ﬁnal data byte. The following shows an example of how data would be

divided for transfer in the case of 32-bit data.

7 6 5 4 3 2 1 0

data0: 0 [bit06] [bit05] [bit04] [bit03] [bit02] [bit01] [bit00]

data1: 0 [bit13] [bit12] [bit11] [bit10] [bit09] [bit08] [bit07]

data2: 0 [bit20] [bit19] [bit18] [bit17] [bit16] [bit15] [bit14]

data3: 0 [bit27] [bit26] [bit25] [bit24] [bit23] [bit22] [bit21]

data4: 0 0 0 0 [bit31] [bit30] [bit29] [bit28]

Single Parameter Data Size Limit Under the Instrument’s System Exclusive message format, the

size of a single message cannot exceed 48 bytes in all other cases. The data size and the array size,

however, can cause a packet to exceed 48 bytes when transferring a single parameter array. In this case,

the IPS and IPR message data length and data index number values can be modiﬁed to enable division

of a single parameter value into multiple messages so it can be sent that way.

14 Individual Parameter Operations

There are two parameter unit operations: Individual Parameter Transfer and Individual Parameter

Request. For one session, in response to an IPR (Individual Parameter Request) from an external

device, this Instrument returns an IPS (Individual Parameter Send) or the session is concluded when

the external device or this Instrument spontaneously sends an IPS. If this Instrument received an IPS,

the value of the applicable parameter is changed. Depending on the function of a parameter, Individual

Parameter Send may be used to issue a command to the Instrument and Individual Parameter Request

may be used to check Instrument status information.

Data Receiver Data Sender Operation

IPR → Send Request(Optional)

← IPS Data Transfer

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Casio CT-X5000 Manuel d'utilisateur Page 25