diff options
| author | Keith Packard <keithp@keithp.com> | 2018-01-07 21:44:39 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2018-01-07 21:44:39 -0800 |
| commit | 48d164e3d4b2ef27fae20fae63b8014803a7b178 (patch) | |
| tree | c0dc65ded8300299b862870f5eabf83d9a36455f /src/stmf0/stm32f0.h | |
| parent | db7f7c6c7f956058250b8057c6c27284f6f22e53 (diff) | |
altos/stmf0: Use double buffering for ChaosKey
This improves the USB performance of ChaosKey so that it doesn't NAK
during data transfers at all.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stmf0/stm32f0.h')
| -rw-r--r-- | src/stmf0/stm32f0.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/stmf0/stm32f0.h b/src/stmf0/stm32f0.h index 277fa223..968c1295 100644 --- a/src/stmf0/stm32f0.h +++ b/src/stmf0/stm32f0.h @@ -2000,7 +2000,12 @@ union stm_usb_bdt { #define STM_USB_BDT_SIZE 8 +/* We'll use the first block of usb SRAM for the BDT */ extern uint8_t stm_usb_sram[] __attribute__((aligned(4))); +extern union stm_usb_bdt stm_usb_bdt[STM_USB_BDT_SIZE] __attribute__((aligned(4))); + +#define stm_usb_sram ((uint8_t *) 0x40006000) +#define stm_usb_bdt ((union stm_usb_bdt *) 0x40006000) struct stm_exti { vuint32_t imr; |