diff options
| -rw-r--r-- | firmware/target/arm/as3525/usb-drv-as3525v2.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/firmware/target/arm/as3525/usb-drv-as3525v2.c b/firmware/target/arm/as3525/usb-drv-as3525v2.c index 24548f30c5..35b50d21cf 100644 --- a/firmware/target/arm/as3525/usb-drv-as3525v2.c +++ b/firmware/target/arm/as3525/usb-drv-as3525v2.c @@ -101,12 +101,14 @@ void usb_attach(void) static inline void usb_delay(void) { - int i = 0; - while(i < 0x300) - { - asm volatile("nop"); - i++; - } + register int i = 0; + asm volatile( + "1: nop \n" + " add %0, %0, #1 \n" + " cmp %0, #0x300 \n" + " bne 1b \n" + : "+r"(i) + ); } static void as3525v2_connect(void) |