Kojo / VS1053-Semaphore

Semaphore based wait and sync for the mp3 play

Dependents:   RTOS-VS1053b-mp3_semaphore

VS1053t.cpp@0:d421471bef92, 2012-03-19 (annotated)

Committer:
takashikojo
Date:
Mon Mar 19 12:08:44 2012 +0000
Revision:
0:d421471bef92
VS1053 driver with Semaphore

Who changed what in which revision?

UserRevisionLine numberNew contents of line
takashikojo 0:d421471bef92 1 /* mbed VLSI VS1053t library
takashikojo 0:d421471bef92 2 *
takashikojo 0:d421471bef92 3 * Thread based VS1053 class inherited by VS1053b
takashikojo 0:d421471bef92 4 *
takashikojo 0:d421471bef92 5 */
takashikojo 0:d421471bef92 6
takashikojo 0:d421471bef92 7
takashikojo 0:d421471bef92 8 #include "mbed.h"
takashikojo 0:d421471bef92 9 #include "rtos.h"
takashikojo 0:d421471bef92 10
takashikojo 0:d421471bef92 11 #include "defines.h"
takashikojo 0:d421471bef92 12 #include "VS1053t.h"
takashikojo 0:d421471bef92 13
takashikojo 0:d421471bef92 14 VS1053t :: VS1053t(
takashikojo 0:d421471bef92 15 PinName mosi, PinName miso, PinName sck,
takashikojo 0:d421471bef92 16 PinName cs, PinName rst, PinName dreq, PinName dcs,
takashikojo 0:d421471bef92 17 char* buffer, int buffer_size, bool thread
takashikojo 0:d421471bef92 18 ):
takashikojo 0:d421471bef92 19
takashikojo 0:d421471bef92 20 VS1053( mosi, miso, sck, cs, rst, dreq, dcs,
takashikojo 0:d421471bef92 21 buffer, buffer_size)
takashikojo 0:d421471bef92 22 { }
takashikojo 0:d421471bef92 23
takashikojo 0:d421471bef92 24 Semaphore lock_buff(1) ;
takashikojo 0:d421471bef92 25
takashikojo 0:d421471bef92 26 unsigned int VS1053t::waitBuffer(unsigned int size, uint32_t time) {
takashikojo 0:d421471bef92 27 int n ;
takashikojo 0:d421471bef92 28 WaitingSize = size ;
takashikojo 0:d421471bef92 29 while ((n = VS1053t::bufferFree()) < size) {
takashikojo 0:d421471bef92 30 if(thread)
takashikojo 0:d421471bef92 31 lock_buff.wait(time) ;
takashikojo 0:d421471bef92 32 else
takashikojo 0:d421471bef92 33 wait_ms(100) ;
takashikojo 0:d421471bef92 34 }
takashikojo 0:d421471bef92 35 // if(n < size) { time out
takashikojo 0:d421471bef92 36 return(n) ;
takashikojo 0:d421471bef92 37 }
takashikojo 0:d421471bef92 38
takashikojo 0:d421471bef92 39 unsigned char VS1053t::bufferGetByte(void) {
takashikojo 0:d421471bef92 40 unsigned char retVal = 0x00;
takashikojo 0:d421471bef92 41 if (bufferCount() > 0x00) {
takashikojo 0:d421471bef92 42 retVal = *_bufferReadPointer++;
takashikojo 0:d421471bef92 43 if (_bufferReadPointer >= _buffer + BUFFER_SIZE) {
takashikojo 0:d421471bef92 44 _bufferReadPointer = _buffer;
takashikojo 0:d421471bef92 45 }
takashikojo 0:d421471bef92 46 }
takashikojo 0:d421471bef92 47 if (thread && (VS1053t::bufferFree() >= WaitingSize))
takashikojo 0:d421471bef92 48 lock_buff.release() ;
takashikojo 0:d421471bef92 49 return retVal;
takashikojo 0:d421471bef92 50 }