baileychic
Advanced Member level 3
My question is related to Wave Player Programming.
I have a 44KHz PCM Wave file stored in a microSD Card. I will be reading it 512 bytes (buffer size) at a time and sending the data to a 12 bit DAC.
As it is a 12 bit DAC I have to clock 12 bit at a time (data size is byte the other bits will be zero).
I have to send 1 byte or 12 clocks in 1/44KHz = 22.72 usec.
So, I need an timer interrupt of (22.72 usec) / 12 = 1.8938 usec.
Is this right ?
I will be using a 64 MHz clock (16 MHz + 4x PLL Internal Oscillator).
Also leaving the wave file header, can I just read the other bytes in sequence and send then directly to DAC ?
I have a 44KHz PCM Wave file stored in a microSD Card. I will be reading it 512 bytes (buffer size) at a time and sending the data to a 12 bit DAC.
As it is a 12 bit DAC I have to clock 12 bit at a time (data size is byte the other bits will be zero).
I have to send 1 byte or 12 clocks in 1/44KHz = 22.72 usec.
So, I need an timer interrupt of (22.72 usec) / 12 = 1.8938 usec.
Is this right ?
I will be using a 64 MHz clock (16 MHz + 4x PLL Internal Oscillator).
Also leaving the wave file header, can I just read the other bytes in sequence and send then directly to DAC ?
