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espressif: i2sout: Comment on these constants better

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This commit is contained in:
Jeff Epler 2024-05-01 13:48:59 -05:00
parent 50a971ea80
commit 6237a14abc
1 changed files with 8 additions and 3 deletions
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11
ports/espressif/common-hal/audiobusio/__init__.c
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@ -35,9 +35,14 @@
#include "shared-module/audiocore/__init__.h"
#define CIRCUITPY_BUFFER_COUNT 3
#define CIRCUITPY_BUFFER_SIZE 1023
#define CIRCUITPY_OUTPUT_SLOTS 2
// The maximum DMA buffer size (in bytes)
#define I2S_DMA_BUFFER_MAX_SIZE 4092
// The number of DMA buffers to allocate
#define CIRCUITPY_BUFFER_COUNT (3)
// The maximum DMA buffer size in frames (at stereo 16-bit)
#define CIRCUITPY_BUFFER_SIZE (I2S_DMA_BUFFER_MAX_SIZE / 4)
// The number of output channels is fixed at 2
#define CIRCUITPY_OUTPUT_SLOTS (2)
static void i2s_fill_buffer(i2s_t *self) {
if (self->next_buffer_size == 0) {