104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
#include "stm32g4xx.h"
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#include "gpio.h"
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#include "pwm.h"
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bool PWM_Enable=false;
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inline static unsigned short Mid(unsigned short Val, unsigned short Min, unsigned short Max)
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{
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if(Val<Min) return Min;
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if(Val>Max) return Max;
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return Val;
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}
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static void InitTIM(TIM_TypeDef* TIM, unsigned long Freq, unsigned long CCER)
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{
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TIM->ARR = (1000000/Freq) - 1;
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TIM->PSC = (SystemCoreClock / (1000000/Freq) / Freq) - 1;
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TIM->CCMR1 = TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1PE | TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC2PE;
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TIM->CCMR2 = TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC3PE | TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2 | TIM_CCMR2_OC4PE;
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TIM->CCER = CCER;
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TIM->BDTR = TIM_BDTR_MOE;
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TIM->CCR1 = 0;
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TIM->CCR2 = 0;
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TIM->CCR3 = 0;
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TIM->CCR4 = 0;
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TIM->CR1 = TIM_CR1_CEN;
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}
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//------------------------------------------------------------------------------
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void PWM_Init(unsigned long Freq)
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{
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RCC->APB1ENR1 |= RCC_APB1ENR1_TIM2EN;
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RCC->APB2ENR |= RCC_APB2ENR_TIM1EN | RCC_APB2ENR_TIM16EN | RCC_APB2ENR_TIM17EN;
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RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN | RCC_AHB2ENR_GPIOBEN;
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GPIO_InitPin(GPIO_PIN_0 | GPIO_PORT_A | GPIO_ALTER | GPIO_AF1); // TIM2_CH1
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GPIO_InitPin(GPIO_PIN_1 | GPIO_PORT_A | GPIO_ALTER | GPIO_AF1); // TIM2_CH2
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GPIO_InitPin(GPIO_PIN_10 | GPIO_PORT_A | GPIO_ALTER | GPIO_AF6); // TIM1_CH3
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GPIO_InitPin(GPIO_PIN_11 | GPIO_PORT_A | GPIO_ALTER | GPIO_AF11); // TIM1_CH4
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InitTIM(TIM2, Freq, TIM_CCER_CC1E | TIM_CCER_CC2E);
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InitTIM(TIM1, Freq, TIM_CCER_CC3E | TIM_CCER_CC4E);
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}
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//------------------------------------------------------------------------------
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static void Stop()
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{
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PWM_Enable=false;
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TIM1->CCER=0;
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TIM2->CCER=0;
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TIM16->CCER=0;
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TIM17->CCER=0;
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}
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//------------------------------------------------------------------------------
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void PWM_SetQuad(short Pow[4], unsigned short Min, unsigned short Max)
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{
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if(!Pow) { Stop(); return; }
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TIM1->CCR4 = Mid(Pow[0], Min, Max);
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TIM2->CCR2 = Mid(Pow[1], Min, Max);
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TIM2->CCR1 = Mid(Pow[2], Min, Max);
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TIM1->CCR3 = Mid(Pow[3], Min, Max);
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bool en=false;
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for(int a=0; a<4; a++) if(Pow[a]>1050) en=true;
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PWM_Enable=en;
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}
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//------------------------------------------------------------------------------
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void PWM_SetHexa(short Pow[6], unsigned short Min, unsigned short Max)
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{
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if(!Pow) { Stop(); return; }
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TIM16->CCR1 = Mid(Pow[0], Min, Max);
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TIM17->CCR1 = Mid(Pow[1], Min, Max);
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TIM2->CCR1 = Mid(Pow[2], Min, Max);
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TIM1->CCR3 = Mid(Pow[3], Min, Max);
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TIM1->CCR4 = Mid(Pow[4], Min, Max);
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TIM2->CCR2 = Mid(Pow[5], Min, Max);
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bool en=false;
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for(int a=0; a<4; a++) if(Pow[a]>1050) en=true;
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PWM_Enable=en;
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}
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//------------------------------------------------------------------------------
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void PWM_SetAll(unsigned short Pow)
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{
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TIM2->CCR1 = Pow;
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TIM1->CCR3 = Pow;
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TIM1->CCR4 = Pow;
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TIM2->CCR2 = Pow;
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bool en=false;
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if(Pow>1050) en=true;
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PWM_Enable=en;
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}
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//------------------------------------------------------------------------------
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