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| author | Marti Bolivar <mbolivar@leaflabs.com> | 2011-06-20 17:16:33 -0400 |
|---|---|---|
| committer | Marti Bolivar <mbolivar@leaflabs.com> | 2011-09-24 16:02:26 -0400 |
| commit | 37c7929637c7047955ddacfb70a5868dcbae7160 (patch) | |
| tree | 19f60c69b6fd7f45f9de42bfa6558a0980e5d01d | |
| parent | e0c7ac23ec37b80a3cddd8782d5e41eb7b639937 (diff) | |
| download | librambutan-37c7929637c7047955ddacfb70a5868dcbae7160.tar.gz librambutan-37c7929637c7047955ddacfb70a5868dcbae7160.zip | |
nvic: Add nvic_sys_reset().
This uses the SCB_AIRCR register to force a system reset.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| -rw-r--r-- | libmaple/nvic.c | 13 | ||||
| -rw-r--r-- | libmaple/nvic.h | 2 |
2 files changed, 14 insertions, 1 deletions
diff --git a/libmaple/nvic.c b/libmaple/nvic.c index 3be5a5a..345c850 100644 --- a/libmaple/nvic.c +++ b/libmaple/nvic.c @@ -83,3 +83,16 @@ void nvic_init(uint32 vector_table_address, uint32 offset) { void nvic_set_vector_table(uint32 addr, uint32 offset) { SCB_BASE->VTOR = addr | (offset & 0x1FFFFF80); } + +/** + * @brief Force a system reset. + * + * Resets all major system components, excluding debug. + */ +void nvic_sys_reset() { + uint32 prigroup = SCB_BASE->AIRCR & SCB_AIRCR_PRIGROUP; + SCB_BASE->AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_SYSRESETREQ | prigroup; + asm volatile("dsb"); + while (1) + ; +} diff --git a/libmaple/nvic.h b/libmaple/nvic.h index e3b052d..feb7335 100644 --- a/libmaple/nvic.h +++ b/libmaple/nvic.h @@ -177,6 +177,7 @@ void nvic_init(uint32 vector_table_address, uint32 offset); void nvic_set_vector_table(uint32 address, uint32 offset); void nvic_irq_set_priority(nvic_irq_num irqn, uint8 priority); +void nvic_sys_reset(); /** * Enables interrupts and configurable fault handlers (clear PRIMASK). @@ -238,4 +239,3 @@ static inline void nvic_irq_disable_all(void) { #endif #endif - |