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author | Marti Bolivar <mbolivar@leaflabs.com> | 2011-01-26 22:05:41 -0500 |
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committer | Marti Bolivar <mbolivar@leaflabs.com> | 2011-01-26 22:05:41 -0500 |
commit | f1b64e707d8aa7548954b110368a7eb46b827794 (patch) | |
tree | 176d7251bd06199ff8ba8a7a9d01745badabbb82 /libmaple/nvic.c | |
parent | e9af9d951a0341ea68ce88d7b5ee3b42b68494b6 (diff) | |
download | librambutan-f1b64e707d8aa7548954b110368a7eb46b827794.tar.gz librambutan-f1b64e707d8aa7548954b110368a7eb46b827794.zip |
[WIP] Code review picked up some bugs/issues.
Diffstat (limited to 'libmaple/nvic.c')
-rw-r--r-- | libmaple/nvic.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/libmaple/nvic.c b/libmaple/nvic.c index ad816ba..155da27 100644 --- a/libmaple/nvic.c +++ b/libmaple/nvic.c @@ -39,9 +39,8 @@ void nvic_set_vector_table(uint32 addr, uint32 offset) { * @param n interrupt number */ void nvic_irq_enable(uint32 n) { - /* TODO: bit-banding would be faster */ - uint32 *iser = &((uint32*)NVIC_ISER0)[(n/32)]; - __write(iser, BIT(n % 32)); + /* TODO: test */ + __write(BITBAND_PERI(NVIC_ISER0, n), 1); } /** @@ -49,20 +48,20 @@ void nvic_irq_enable(uint32 n) { * @param n interrupt number */ void nvic_irq_disable(uint32 n) { - /* TODO: bit-banding would be faster */ - uint32 *icer = &((uint32*)NVIC_ICER0)[(n/32)]; - __write(icer, BIT(n % 32)); + /* TODO: test */ + __write(BITBAND_PERI(NVIC_ICER0, n), 1); } void nvic_irq_disable_all(void) { - /* TODO why not: - __write(NVIC_ICER0, 0); - __write(NVIC_ICER1, 0); - */ - short n; - for(n=0; n<65; n++) { - nvic_irq_disable(n); - } + /* Each ICER register contains 1 bit per interrupt. Writing a 1 + to that bit disables the corresponding interrupt. So each of + the following lines disables up to 32 interrupts at a time. + Since low, medium, and high-density devices all have less than + 64 interrupts, this suffices. */ + /* TODO: fix for connectivity line: __write(NVIC_ICER2,1), + requires connectivity line support in libmaple.h */ + __write(NVIC_ICER0, 1); + __write(NVIC_ICER1, 1); } /** |