From 5ba472d5c9777e83523d7db718743e3cd5c8761a Mon Sep 17 00:00:00 2001 From: hathach Date: Sun, 26 Apr 2026 10:14:31 +0700 Subject: shrink cdc_msc_throughput MSC buffer for FS targets MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit CFG_TUD_MSC_EP_BUFSIZE: 4096 → (HS ? 4096 : 1024). Keep the big buffer for HS where it actually amortises CBW overhead at iperf-class throughput; FS peaks around ~830 kBps so 1 KB is plenty and the example now fits on small-RAM MCUs (lpc11/13, samd11, kinetis_kl, stm32f0/l0, stm32f1, etc.). Also dedupe CDC_TX_BUFSIZE = CDC_RX_BUFSIZE. Drops the previously-needed skip.txt — verified builds locally on lpcxpresso1347, cynthion_d11, lpcxpresso11u37/u68, stm32f072disco/eval, frdm_kl25z, stm32l052dap52. Co-Authored-By: Claude Opus 4.7 (1M context) --- examples/device/cdc_msc_throughput/skip.txt | 23 ---------------------- .../device/cdc_msc_throughput/src/tusb_config.h | 4 ++-- 2 files changed, 2 insertions(+), 25 deletions(-) delete mode 100644 examples/device/cdc_msc_throughput/skip.txt diff --git a/examples/device/cdc_msc_throughput/skip.txt b/examples/device/cdc_msc_throughput/skip.txt deleted file mode 100644 index ab62e8091..000000000 --- a/examples/device/cdc_msc_throughput/skip.txt +++ /dev/null @@ -1,23 +0,0 @@ -mcu:CH32V103 -mcu:CH32V20X -mcu:LPC11UXX -mcu:LPC13XX -mcu:LPC15XX -mcu:MCXA15 -mcu:MSP430x5xx -mcu:NUC121 -mcu:SAMD11 -mcu:STM32L0 -mcu:STM32F0 -mcu:KINETIS_KL -mcu:STM32H7RS -mcu:STM32N6 -family:broadcom_64bit -family:broadcom_32bit -family:espressif -board:at_start_f425 -board:curiosity_nano -board:frdm_kl25z -family:lpc55 -family:nuc126 -family:nuc100_120 diff --git a/examples/device/cdc_msc_throughput/src/tusb_config.h b/examples/device/cdc_msc_throughput/src/tusb_config.h index 0a0d6dca9..6c8655719 100644 --- a/examples/device/cdc_msc_throughput/src/tusb_config.h +++ b/examples/device/cdc_msc_throughput/src/tusb_config.h @@ -85,7 +85,7 @@ extern "C" { // Large MSC bulk buffer: host transfers big CBW payloads (e.g. dd bs=1M does 64KiB // chunks). A 4K per-bulk-IO buffer lets the class driver amortise the per-CBW // overhead across many USB packets, approximating the maximum USB bulk throughput. -#define CFG_TUD_MSC_EP_BUFSIZE 4096 +#define CFG_TUD_MSC_EP_BUFSIZE (TUD_OPT_HIGH_SPEED ? 4096 : 1024) // #define CFG_TUD_CDC_TX_PERSISTENT 1 @@ -94,7 +94,7 @@ extern "C" { #define CFG_TUD_CDC_TX_EPSIZE CFG_TUD_CDC_RX_EPSIZE #define CFG_TUD_CDC_RX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 2*512 : 2*64) -#define CFG_TUD_CDC_TX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 2*512 : 2*64) +#define CFG_TUD_CDC_TX_BUFSIZE CFG_TUD_CDC_RX_BUFSIZE #ifdef __cplusplus } -- cgit v1.3.1