Texas Instruments PurePath TAS5766M, Руководство пользователя

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PurePath™ Smart Amp User Manual (TAS5766M/68M) 39
Setting Burst to 120 can help reduce the end-system download times and required code space
significantly.
The sample .ddf file used for these steps simply dumped coefficients (C-RAM), instructions (I-
RAM) and device settings. For this particular device, it places the device into standby, which
allows C-RAM and I-RAM access through I
2
C in the end-system. An example header file output
snippet for the TAS5766M is shown in Figure 15 .
cfg_reg registers[] = {
.
.
.
// -----------------------------------------------------------------------------
// Standby (allows I2C access to C-RAM and I-RAM)
// -----------------------------------------------------------------------------
// Select Page 0
{ 0x00, 0x00 },
// Set the device into Standby
{ 0x02, 0x10 },
// -----------------------------------------------------------------------------
// Begin Coefficient Memory (C-RAM_D), Buffer A Dump
// -----------------------------------------------------------------------------
// Page 44 (0x2C) Dump
{ 0x00, 0x2c },
{ CFG_META_BURST, 121 },
{ 0x08, 0x40 },
{ 0x26, 0xe7 },
.
.
.
// -----------------------------------------------------------------------------
// Wake
// -----------------------------------------------------------------------------
// Select Page 0
{ 0x00, 0x00 },
// Wake from Standby
{ 0x02, 0x00 },
};
Figure 15. Example Header File Output Snippet
6.3.1 Working with Non-Standard Configurations
As mentioned previously, custom .ddf files can be created as needed. If the Smart Amp device
design in the end-system is the same as in the EVM schematic and clocking is similar then there
is no need to edit this file. However, if there are changes from the EVM schematic design such
as different clock configurations, then this
.ddf file may need to be modified. Details on how to
create custom DDFs can be found in the Appendix sections of the PurePath™ Console 3 User
Manual [ 7 ].
The default DDF files can be found by searching *.ddf in the folder below:
“ C:\Program Files (x86)\Texas Instruments\PurePath Console 3\ ”