diff options
Diffstat (limited to 'drivers/ppmsum.cpp')
-rw-r--r-- | drivers/ppmsum.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/ppmsum.cpp b/drivers/ppmsum.cpp new file mode 100644 index 0000000..2beaccb --- /dev/null +++ b/drivers/ppmsum.cpp @@ -0,0 +1,54 @@ +#include "ppmsum.h" + +PPMSum* PPMSum::self = 0; + +template<> +void interrupt<Interrupt::TIM1_UP>() { + PPMSum::self->irq(); +} + +template<> +void interrupt<Interrupt::TIM1_CC>() { + PPMSum::self->irq(); +} + +void PPMSum::irq() { + int16_t sr = TIM1.SR; + TIM1.SR = 0; + + if(sr & 0x01) { + // Timeout. + + synced = false; + + } else if(sr & 0x02) { + // Period. + + if(TIM1.CCR1 > 5000) { + synced = true; + index = 0; + } else { + index++; + index &= 0xf; + } + + } else if(sr & 0x04) { + // Pulsewidth. + + channels[index] = TIM1.CCR2; + } +} + +void PPMSum::enable() { + RCC.enable(RCC.TIM1); + TIM1.PSC = 72; + TIM1.CCMR1 = 0x0201; + TIM1.SMCR = 0x54; + TIM1.CCER = 0x31; + TIM1.DIER = 0x07; + + Interrupt::enable(Interrupt::TIM1_UP); + Interrupt::enable(Interrupt::TIM1_CC); + + TIM1.CR1 = 0x05; +} |