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Move defines and checks to expected places

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This commit is contained in:
Sam Chesney
2016-12-07 11:41:05 +00:00
parent 5e09197c15
commit 4b9e323593
3 changed files with 41 additions and 26 deletions
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35
module_usb_audio/devicedefines.h
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@@ -121,6 +121,41 @@
#define I2S_WIRES_ADC (I2S_CHANS_ADC / I2S_CHANS_PER_FRAME)
#endif
/**
* @brief Incoming I2S (device to host) channels can be downsampled by a factor of 3.
*
* Default: 1 i.e. downsampling is disabled.
*/
#ifndef I2S_DOWNSAMPLE_FACTOR
#define I2S_DOWNSAMPLE_FACTOR (1)
#else
#if (I2S_DOWNSAMPLE_FACTOR != 3)
#error Unsupported I2S downsampling configuration
#endif
#endif
/**
* @brief Only downsample one channel per I2S frame.
*
* Default: 0 i.e. mono mode is disabled, all channels will be downsampled.
*/
#ifndef I2S_DOWNSAMPLE_MONO
#define I2S_DOWNSAMPLE_MONO (0)
#endif
/**
* @brief Number of incoming (device to host) I2S channels to downsample.
*
* Default: The number of I2S incoming channels, or half this if mono downsampling is enabled.
*/
#if (I2S_DOWNSAMPLE_MONO == 1)
#define I2S_DOWNSAMPLE_CHANS (I2S_CHANS_ADC / 2)
#if ((I2S_DOWNSAMPLE_FACTOR > 1) && (I2S_MODE_TDM == 1))
#error Mono I2S downsampling is not avaliable in TDM mode
#endif
#else
#define I2S_DOWNSAMPLE_CHANS I2S_CHANS_ADC
#endif
/**
* @brief Max supported sample frequency for device (Hz). Default: 192000