Hi!, i'm working on a audio project with realTime FFT and some audioFX like reverbs, echo, flanger, timestretching etc.. to be ported also on Arduino.
i got something i don't understand about I2S TDM, i understand the actual i2s library does not support it, there's a way to update the driver and implement it? on arduino framework there's not "i2s.c" but only the Header file...
thanks to much for your answer.
I2S Driver, ESP32 can support TDM ?
-
- Posts: 2
- Joined: Thu Oct 18, 2018 9:47 am
Re: I2S Driver, ESP32 can support TDM ?
i found this on the i2s registers documentation
but i didn't found what is meaning " _S " or "_V " or "_ M " ,
what i'm working on is for example this codec with TDM Support:
https://www.akm.com/akm/en/file/datasheet/AK4558EN.pdf
at Page 59, (quick search "Mode34 38") we can see the LRCK Timing
actually for what i'm looking i hope just to arrive to send the 4 channel buffer..
any idea?
Code: Select all
/* I2S_TX_WS_OUT_DELAY : R/W ;bitpos:[13:12] ;default: 2'b0 ; */
/*description: */
#define I2S_TX_WS_OUT_DELAY 0x00000003
#define I2S_TX_WS_OUT_DELAY_M ((I2S_TX_WS_OUT_DELAY_V)<<(I2S_TX_WS_OUT_DELAY_S))
#define I2S_TX_WS_OUT_DELAY_V 0x3
#define I2S_TX_WS_OUT_DELAY_S 12
what i'm working on is for example this codec with TDM Support:
https://www.akm.com/akm/en/file/datasheet/AK4558EN.pdf
at Page 59, (quick search "Mode34 38") we can see the LRCK Timing
actually for what i'm looking i hope just to arrive to send the 4 channel buffer..
any idea?
-
- Posts: 9709
- Joined: Thu Nov 26, 2015 4:08 am
Re: I2S Driver, ESP32 can support TDM ?
FWIW, _M is the mask for the bits, _S is the shift value for the bits, _V is the maximum value for these bits. They all describe the same 2 bits in the register, just different aspects of it to make it easier to write macros against.
Who is online
Users browsing this forum: No registered users and 36 guests