How do I change the sample rate for the code, how do I set the packet size and packet count and buffer size for different sample rates? such as 44.1khz or 48khz or 22khz?
/*---------------------------------------------------------------------------- * Name: usbaudio.h * Purpose: USB Audio Demo Definitions * Version: V1.10 *---------------------------------------------------------------------------- * This software is supplied "AS IS" without any warranties, express, * implied or statutory, including but not limited to the implied * warranties of fitness for purpose, satisfactory quality and * noninfringement. Keil extends you a royalty-free right to reproduce * and distribute executable files created using this software for use * on NXP Semiconductors LPC family microcontroller devices only. Nothing * else gives you the right to use this software. * * Copyright (c) 2009 Keil - An ARM Company. All rights reserved. *---------------------------------------------------------------------------*/ /* Audio Definitions */ #define DATA_FREQ 32000 /* Audio Data Frequency */ #define P_S 32 /* Packet Size */ #if USB_DMA #define P_C 4 /* Packet Count */ #else #define P_C 1 /* Packet Count */ #endif #define B_S (8*P_C*P_S) /* Buffer Size */ /* Push Button Definitions */ // #define PBINT 0x00004000 /* P0.14 */ /* LED Definitions */ #define LEDMSK 0x000000FF /* P2.0..7 */ /* Audio Demo Variables */ extern uint8_t Mute; /* Mute State */ extern uint32_t Volume; /* Volume Level */ extern uint16_t VolCur; /* Volume Current Value */ #if !USB_DMA extern uint32_t InfoBuf[P_C]; /* Packet Info Buffer */ extern short DataBuf[B_S]; /* Data Buffer */ #else extern uint32_t *InfoBuf; extern short *DataBuf; #endif extern uint16_t DataOut; /* Data Out Index */ extern uint16_t DataIn; /* Data In Index */ extern uint8_t DataRun; /* Data Stream Run State */