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arch/arm/src/stm32/stm32_dfumode.c: Minor improvements.

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This commit is contained in:
Gregory Nutt 2019-03-21 14:21:59 -06:00
parent d2dac21929
commit 2b52379dd6
1 changed files with 4 additions and 2 deletions
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6
arch/arm/src/stm32/stm32_dfumode.c
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@ -54,7 +54,7 @@
* Name: stm32_dfumode
*
* Description:
* Reboot the part in DFU mode.
* Reboot the part in DFU mode (GCC only).
*
* https://community.st.com/s/question/0D50X00009XkhAzSAJ/calling-stm32429ieval-bootloader
*
@ -62,8 +62,10 @@
void stm32_dfumode(void)
{
#ifdef CONFIG_DEBUG_WARN
_warn("Entering DFU mode...\n");
sleep(1);
#endif
asm("ldr r0, =0x40023844\n\t" /* RCC_APB2ENR */
"ldr r1, =0x00004000\n\t" /* Enable SYSCFG clock */
@ -76,5 +78,5 @@ void stm32_dfumode(void)
"ldr r0,[r0, #4]\n\t" /* PC @ 4 */
"bx r0\n");
__builtin_unreachable(); /* Tell compiler we will not return */
__builtin_unreachable(); /* Tell compiler we will not return */
}