#define PWM_CLK1M_ARR_8K 125-1
#define TIM_CLK1M 1000000
IzTrigPWMInit(TIM_CLK1M,PWM_CLK1M_ARR_8K);
void IzTrigPWMInit( uint32_t TIMCLK, uint16_t PWMCLK)//10%~90%
//void IzTDivPWMInit( uint32_t TIMCLK, uint16_t PWMCLK)//10%~90%
{
if(TIMCLK>SystemCoreClock)
{
TIMCLK = SystemCoreClock;
}
//reset
/* TIM3 enable counter */
TIM_Cmd(TIM1, DISABLE);
/* TIM3 Main Output Enable */
TIM_CtrlPWMOutputs(TIM1, DISABLE);
//end of reset
/* System Clocks Configuration */
// RCCPWMADCConfiguration();
/* TIM1 clock enable */
RCCPWMTDivConfiguration();
GPIOPWMTDivConfiguration();
/* -----------------------------------------------------------------------
TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles:
The TIM3CLK frequency is set to SystemCoreClock (Hz), to get TIM3 counter
clock at 24 MHz the Prescaler is computed as following:
- Prescaler = (TIM3CLK / TIM3 counter clock) - 1
SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
and Connectivity line devices and to 24 MHz for Low-Density Value line and
Medium-Density Value line devices
The TIM3 is running at 36 KHz: TIM3 Frequency = TIM3 counter clock/(ARR + 1)
= 24 MHz / 666 = 36 KHz
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR)* 100 = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR)* 100 = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR)* 100 = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR)* 100 = 12.5%
----------------------------------------------------------------------- */
/* Compute the prescaler value */
//PrescalerValue = (uint16_t) (SystemCoreClock / 1000000) - 1;//24M
//TIM3 Frequency=1MHz/(9999+1) =100Hz
PrescalerValue = (uint16_t) (SystemCoreClock / TIMCLK) - 1; //TIM3 counter clock: 1MHz
/* Time base configuration */
//TIM_TimeBaseStructure.TIM_Period = 665;//(ARR)
//TIM3 Frequency=1MHz/(9999+1) =100Hz
// TIM_TimeBaseStructure.TIM_Period = 10000-1; //TIM3 counter clock/TIM3 Frequency
//TIM3 Frequency=1MHz/(99+1) =10 000Hz
TIM_TimeBaseStructure.TIM_Period = PWMCLK;//PWM_CLK1M_ARR_100; //TIM3 counter clock/TIM3 Frequency
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //TIM1
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/* TIM1 Channel 1 Configuration in PWM mode */
// /*
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(PWMCLK)*50/100;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
// */
#if 0
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
// TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputState_Enable;
/*
if(PWMCLK==0)
{
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(50/100);
}
else
*/
{
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(PWMCLK)*50/100;
}
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
// TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
#endif
/*
//PA8: TM1 Channel1
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
*/
//PB14: TIM1_CH2N
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
#if 0
//PA9: TM1 Channel2
/* PWM1 Mode configuration: Channel3 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(PWM_CLK1M_ARR_10K)*50/100;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
//PA10: TM1 Channel3
/* PWM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(PWM_CLK1M_ARR_10K)*50/100;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel4 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = (uint16_t)(PWM_CLK1M_ARR_10K)*ch1duty/100; ;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
#endif
/* Automatic Output enable, Break, dead time and lock configuration*/
///*
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
TIM_BDTRInitStructure.TIM_DeadTime = 5;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
//*/
// TIM_BDTRStructInit();
TIM_ARRPreloadConfig(TIM1, ENABLE);
/* TIM1 enable counter */
TIM_Cmd(TIM1, ENABLE);
/* TIM1 Main Output Enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
