FastPWM
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Diff: Device/FastPWM_LPC1768.cpp
- Revision:
- 4:a7b9f778c4b4
- Child:
- 29:3e4d3b900850
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Device/FastPWM_LPC1768.cpp Tue Aug 13 16:54:06 2013 +0000 @@ -0,0 +1,34 @@ +#ifdef TARGET_LPC1768 + +#include "FastPWM.h" + +void FastPWM::initFastPWM( void ) { + //Set clock source + LPC_SC->PCLKSEL0|=1<<12; + bits = 32; +} + +void FastPWM::pulsewidth_ticks( uint32_t ticks ) { + *(_pwm.MR) = ticks; + LPC_PWM1->LER |= 1 << _pwm.pwm; +} + +void FastPWM::period_ticks( uint32_t ticks ) { + LPC_PWM1->MR0 = ticks; + LPC_PWM1->LER |= 1 << 0; +} + +uint32_t FastPWM::getPeriod( void ) { + return LPC_PWM1->MR0; +} + +//Maybe implemented later, but needing to change the prescaler for a 32-bit +//timer used in PWM mode is kinda unlikely. +//If you really need to do it, rejoice, you can make it run so slow a period is over 40,000 year +uint32_t FastPWM::setPrescaler(uint32_t reqScale) { + //Disable dynamic prescaling + dynamicPrescaler = false; + + return 1; +} +#endif \ No newline at end of file