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Signed-off-by: HiFiPhile <admin@hifiphile.com>
This commit is contained in:
HiFiPhile
2025-09-12 16:49:55 +02:00
parent 7810b58161
commit 8515e47ad9
1 changed files with 12 additions and 5 deletions
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17
src/portable/st/stm32_fsdev/fsdev_stm32.h
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@@ -268,7 +268,10 @@
#endif
#ifndef CFG_TUD_FSDEV_DOUBLE_BUFFERED_ISO_EP
// Defaults to double-buffered isochronous endpoints on devices with >1KB PMA
// Default configuration for double-buffered isochronous endpoints:
// - Enable double buffering on devices with >1KB Packet Memory Area (PMA)
// to improve isochronous transfer reliability and performance
// - Disable on devices with limited PMA to conserve memory space
#if FSDEV_PMA_SIZE > 1024u
#define CFG_TUD_FSDEV_DOUBLE_BUFFERED_ISO_EP 1
#else
@@ -277,12 +280,16 @@
#endif
#if FSDEV_HAS_SBUF_ISO != 0 && CFG_TUD_FSDEV_DOUBLE_BUFFERED_ISO_EP == 0
// If hardware has SBUF_ISO bit single-buffered endpoints consume only
// one half of endpoint pair register.
// SBUF_ISO configuration:
// - Some STM32 devices have special hardware support for single-buffered isochronous endpoints
// - When SBUF_ISO bit is available and double buffering is disabled:
// Enable SBUF_ISO to optimize endpoint register usage (one half of endpoint pair register)
#define FSDEV_USE_SBUF_ISO 1
#else
// Otherwise it consumes entire endpoint pair but we can at least save
// memory by configuring the same buffer twice.
// When either:
// - Hardware doesn't support SBUF_ISO feature, or
// - Double buffering is enabled for isochronous endpoints
// We must use the entire endpoint pair register
#define FSDEV_USE_SBUF_ISO 0
#endif