diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/st/stm32_fsdev/fsdev_stm32.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/src/portable/st/stm32_fsdev/fsdev_stm32.h b/src/portable/st/stm32_fsdev/fsdev_stm32.h index 79052b489..070aa00ec 100644 --- a/src/portable/st/stm32_fsdev/fsdev_stm32.h +++ b/src/portable/st/stm32_fsdev/fsdev_stm32.h @@ -256,10 +256,14 @@ TU_ATTR_ALWAYS_INLINE static inline void fsdev_int_disable(uint8_t rhport) { //--------------------------------------------------------------------+ #ifdef CFG_TUSB_FSDEV_32BIT -// ES0561 (STM32H503), ES0587 (STM32U535/U545) -// CTR may trigger before final PMA SRAM accesses complete on OUT transfers. -// Insert delay before reading PMA count/data. -// Max CPU frequency in MHz, used to derive conservative FSDEV PMA delay defaults. +/* Errata: Buffer description table update completes after CTR interrupt triggers + * https://www.st.com/resource/en/errata_sheet/es0561-stm32h503cbebkbrb-device-errata-stmicroelectronics.pdf + * https://www.st.com/resource/en/errata_sheet/es0587-stm32u535xx-and-stm32u545xx-device-errata-stmicroelectronics.pdf + * + * CTR may trigger before final PMA SRAM accesses complete on OUT transfers. + * Insert delay before reading PMA count/data. + * Max CPU frequency in MHz, used to derive conservative FSDEV PMA delay defaults. + */ #if CFG_TUSB_MCU == OPT_MCU_STM32H5 #define FSDEV_STM32_CPU_MHZ 250U #elif CFG_TUSB_MCU == OPT_MCU_STM32U5 @@ -283,10 +287,9 @@ TU_ATTR_ALWAYS_INLINE static inline void fsdev_int_disable(uint8_t rhport) { #endif TU_ATTR_ALWAYS_INLINE static inline void fsdev_btable_workaround_delay(bool low_speed) { - uint32_t cycle_count = low_speed ? CFG_TUSB_FSDEV_BTABLE_LS_DELAY_COUNT : CFG_TUSB_FSDEV_BTABLE_FS_DELAY_COUNT; - volatile uint32_t delay_count = cycle_count; - while (delay_count > 0U) { - delay_count--; + volatile uint32_t cycle_count = low_speed ? CFG_TUSB_FSDEV_BTABLE_LS_DELAY_COUNT : CFG_TUSB_FSDEV_BTABLE_FS_DELAY_COUNT; + while (cycle_count > 0U) { + cycle_count--; } } #endif |