DRV2667RGPR datasheet(36/51 Pages) TI2

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8.3.2.2 Library Storage Example

This example loads and plays the six effects shown in Figure 6-15 through Figure 6-20 into the waveform RAM.

This is a simple example of how to put multiple waveforms in memory for subsequent low-latency recall. It is

generally good practice to put the waveform header in page 1, and the waveform data in the following pages.

When new waveforms are added later, the waveform data does not need to be shifted when this practice is

used. Although this sequence seems long with the verbose descriptions, this example only takes 121 bytes of

the waveform RAM, that is 6% of the available on-chip memory.

I2C ADDRESS

I2C DATA

DESCRIPTION

Control

0x02

0x00

Take device out of standby mode

0x01

0x03

Set to highest gain, 200 VPP maximum

0x03

0x02

Set sequencer to play waveform ID #2 (Figure 6-15)

0x04

0x01

Set sequencer to play waveform ID #1 (Figure 6-16)

0x05

0x03

Set sequencer to play waveform ID #3 (Figure 6-17)

0x06

0x04

Set sequencer to play waveform ID #4 (Figure 6-18)

0x07

0x05

Set sequencer to play waveform ID #5 (Figure 6-19)

0x08

0x06

Set sequencer to play waveform ID #6 (Figure 6-20)

0x09

0x00

End of sequence

Header

0xFF

0x01

Set memory to page 1

0x00

0x1E

Header size –1

0x01

0x81

Start address upper byte #1, also indicates Mode 3

0x02

0x00

Start address lower byte #1

0x03

0x01

Stop address upper byte #1

0x04

0x03

Stop address lower byte #1

0x05

0x01

Repeat count, play waveform #1 once

0x06

0x81

Start address upper byte #2, also indicates Mode 3

0x07

0x04

Start address lower byte #2

0x08

0x01

Stop address upper byte #2

0x09

0x07

Stop address lower byte #2

0x0A

0x01

Repeat count, play waveform #2 once

0x0B

0x81

Start address upper byte #3, also indicates Mode 3

0x0C

0x08

Start address lower byte #3

0x0D

0x01

Stop address upper byte #3

0x0E

0x0B

Stop address lower byte #3

0x0F

0x01

Repeat count, play waveform #3 once

0x10

0x81

Start address upper byte #4, also indicates Mode 3

0x11

0x0C

Start address lower byte #4

0x12

0x01

Stop address upper byte #4

0x13

0x1B

Stop address lower byte #4

0x14

0x01

Repeat count, play waveform #4 once

0x15

0x81

Start address upper byte #5, also indicates Mode 3

0x16

0x1C

Start address lower byte #5

0x17

0x01

Stop address upper byte #5

0x18

0x37

Stop address lower byte #5

0x19

0x01

Repeat count, play waveform #5 once

0x1A

0x81

Start address upper byte #6, also indicates Mode 3

DRV2667

SLOS751E – MARCH 2013 – REVISED JANUARY 2023

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