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fix stm32u0 data stride #3472

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Merged
hathach merged 2 commits into from
Feb 5, 2026
+15 −16
Merged

fix stm32u0 data stride #3472

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31dfd67
fix stm32u0 data stride
HiFiPhile Jan 26, 2026
26ca4e2
reverse pma size check to reduce duplication
hathach Feb 5, 2026
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1 change: 1 addition & 0 deletions .idea/cmake.xml
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22 changes: 10 additions & 12 deletions src/portable/st/stm32_fsdev/fsdev_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -63,23 +63,21 @@ TU_VERIFY_STATIC(FSDEV_BTABLE_BASE % 8 == 0, "BTABLE base must be aligned to 8 b

// CFG_TUSB_FSDEV_PMA_SIZE is PMA buffer size in bytes.
// - 512-byte devices, access with a stride of two words (use every other 16-bit address)
// - 1024-byte devices, access with a stride of one word (use every 16-bit address)
// - 1024-byte devices, access with a stride of one word (use every 16-bit address) or 32-bit address
// - 2048-byte devices, access with 32-bit address

// For purposes of accessing the packet
#if CFG_TUSB_FSDEV_PMA_SIZE == 512
// 1x16 bit / word access scheme
#define FSDEV_PMA_STRIDE 2
#define pma_access_scheme TU_ATTR_ALIGNED(4)
#elif CFG_TUSB_FSDEV_PMA_SIZE == 1024
// 2x16 bit / word access scheme
#define FSDEV_PMA_STRIDE 1
#define pma_access_scheme
#elif CFG_TUSB_FSDEV_PMA_SIZE == 2048
#if CFG_TUSB_FSDEV_PMA_SIZE == 2048 || TU_CHECK_MCU(OPT_MCU_STM32U0)
// 32 bit access scheme
#define FSDEV_BUS_32BIT
#define FSDEV_PMA_STRIDE 1
#define pma_access_scheme
#elif CFG_TUSB_FSDEV_PMA_SIZE == 1024
// 2x16 bit / word access scheme
#define FSDEV_PMA_STRIDE 1
#define pma_access_scheme
#elif CFG_TUSB_FSDEV_PMA_SIZE == 512
// 1x16 bit / word access scheme
#define FSDEV_PMA_STRIDE 2
#define pma_access_scheme TU_ATTR_ALIGNED(4)
#endif

// The fsdev_bus_t type can be used for both register and PMA access necessities
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8 changes: 4 additions & 4 deletions src/tusb_option.h
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Original file line number Diff line number Diff line change
Expand Up @@ -340,14 +340,14 @@
#if defined(TUP_USBIP_FSDEV)
#define CFG_TUD_EDPT_DEDICATED_HWFIFO 1

#if CFG_TUSB_FSDEV_PMA_SIZE == 512
#define CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE 2 // 16-bit data
#if CFG_TUSB_FSDEV_PMA_SIZE == 2048 || TU_CHECK_MCU(OPT_MCU_STM32U0)
#define CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE 4 // 32-bit data
#define CFG_TUSB_FIFO_HWFIFO_ADDR_STRIDE 4 // 32-bit address increase
#elif CFG_TUSB_FSDEV_PMA_SIZE == 1024
#define CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE 2 // 16-bit data
#define CFG_TUSB_FIFO_HWFIFO_ADDR_STRIDE 2 // 16-bit address increase
#elif CFG_TUSB_FSDEV_PMA_SIZE == 2048
#define CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE 4 // 32-bit data
#elif CFG_TUSB_FSDEV_PMA_SIZE == 512
#define CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE 2 // 16-bit data
#define CFG_TUSB_FIFO_HWFIFO_ADDR_STRIDE 4 // 32-bit address increase
#endif
#endif
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