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| author | Rafaël Carré <rafael.carre@gmail.com> | 2011-05-03 17:17:23 +0000 |
|---|---|---|
| committer | Rafaël Carré <rafael.carre@gmail.com> | 2011-05-03 17:17:23 +0000 |
| commit | befabb2bab2736667d681c192bf4cb51b3aca032 (patch) | |
| tree | 8e6996ed8d6850d03848af03f3eddf1ff9e7a3c3 | |
| parent | 8fa0e13c9f4a4dfe9f1bb4c4d90f6fd257c92223 (diff) | |
AMSv2 USB: Write usb_delay() in assembly
Ensure no changes when we use different versions of gcc (USB used to panic with gcc 4.6.0)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29818 a1c6a512-1295-4272-9138-f99709370657
| -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) |