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Dependents: qonly_controller foc-ed_in_the_bot_compact foc-ed_in_the_bot_compact CurrentModeSine ... more
Fork of FastPWM by
Device/FastPWM_LPC11XX.cpp
- Committer:
- Sissors
- Date:
- 2015-04-19
- Revision:
- 23:ed690a19dc55
- Parent:
- Device/FastPWM_LPC11U24.cpp@ 12:4600daab8a83
File content as of revision 23:ed690a19dc55:
#if defined(TARGET_LPC11UXX) || defined(TARGET_LPC11XX_11CXX) #include "FastPWM.h" #define PWM_MR (*(((fastpwm_struct*)fast_obj)->MR)) #define PWM_TIMER (((fastpwm_struct*)fast_obj)->timer) typedef struct { uint8_t timer; uint8_t mr; } timer_mr; #ifdef TARGET_LPC11UXX typedef struct { __IO uint32_t *MR; LPC_CTxxBx_Type *timer; } fastpwm_struct; static timer_mr pwm_timer_map[11] = { {0, 0}, {0, 1}, {0, 2}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {2, 2}, {3, 0}, {3, 1}, {3, 2}, }; static LPC_CTxxBx_Type *Timers[4] = { LPC_CT16B0, LPC_CT16B1, LPC_CT32B0, LPC_CT32B1 }; #else //LPC11XX typedef struct { __IO uint32_t *MR; LPC_TMR_TypeDef *timer; } fastpwm_struct; static timer_mr pwm_timer_map[5] = { {0, 0}, /* CT16B0, MR0 */ {0, 1}, /* CT16B0, MR1 */ {1, 0}, /* CT16B1, MR0 */ {1, 1}, /* CT16B1, MR1 */ {2, 2}, /* CT32B0, MR2 */ }; static LPC_TMR_TypeDef *Timers[3] = { LPC_TMR16B0, LPC_TMR16B1, LPC_TMR32B0 }; #endif void FastPWM::initFastPWM( void ) { fast_obj = new fastpwm_struct; timer_mr tid = pwm_timer_map[_pwm.pwm]; PWM_TIMER = Timers[tid.timer]; (((fastpwm_struct*)fast_obj)->MR) = &PWM_TIMER->MR[tid.mr]; if (tid.timer < 2) //16-bit timer bits = 16; else //32-bit timer bits = 32; } void FastPWM::pulsewidth_ticks( uint32_t ticks ) { if (ticks) PWM_MR = PWM_TIMER->MR3 - ticks; //They inverted PWM on the 11u24 else PWM_MR = 0xFFFFFFFF; //If MR3 = ticks 1 clock cycle wide errors appear, this prevents that (unless MR3 = max). } void FastPWM::period_ticks( uint32_t ticks ) { PWM_TIMER->TCR = 0x02; PWM_TIMER->MR3 = ticks; PWM_TIMER->TCR = 0x01; } uint32_t FastPWM::getPeriod( void ) { return PWM_TIMER->MR3; } uint32_t FastPWM::setPrescaler(uint32_t reqScale) { //If 32-bit, disable auto-scaling, return 1 if (bits == 32) { dynamicPrescaler = false; return 1; } //Else 16-bit timer: if (reqScale == 0) //Return prescaler return PWM_TIMER->PR + 1; if (reqScale > (uint32_t)(1<<16)) reqScale = 1<<16; //Else set prescaler, we have to substract one from reqScale since a 0 in PCVAL is prescaler of 1 PWM_TIMER->PR = reqScale - 1; return reqScale; } #endif