/**
* @brief Example firmware main entry point.
* @par Parameters:
* None
* @retval
* None
*/
void main(void)
{
/* Time base configuration */
TIM2_TimeBaseInit(TIM2_PRESCALER_2048, 65535);
/* Prescaler configuration */
TIM2_PrescalerConfig(TIM2_PRESCALER_2048, TIM2_PSCRELOADMODE_IMMEDIATE);
/* Output Compare Active Mode configuration: Channel1 */
/*
TIM2_OCMode = TIM2_OCMODE_ACTIVE
TIM2_OutputState = TIM2_OUTPUTSTATE_ENABLE
TIM2_Pulse = CCR1_Val
TIM2_OCPolarity = TIM2_OCPOLARITY_HIGH
*/
TIM2_OC1Init(TIM2_OCMODE_ACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR1_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC1PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel2 */
/*TIM2_Pulse = CCR2_Val */
TIM2_OC2Init(TIM2_OCMODE_ACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR2_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC2PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel3 */
/*
TIM2_Pulse = CCR3_Val
*/
TIM2_OC3Init(TIM2_OCMODE_ACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR3_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC3PreloadConfig(DISABLE);
TIM2_ARRPreloadConfig(ENABLE);
/* Set PG.6 pin */
GPIO_Init(GPIOG, GPIO_PIN_6, GPIO_MODE_OUT_PP_LOW_FAST);
GPIO_WriteHigh(GPIOG, GPIO_PIN_6);
/* TIM2 enable counter */
TIM2_Cmd(ENABLE);
while (1);
}
void tim2_on(void)
{
TIM2_TimeBaseInit(TIM2_Prescaler_2,TIM2_CounterMode_Up,0x0800);
TIM2_OC1Init(TIM2_OCMode_PWM2,TIM2_OutputState_Enable,0x0400,TIM2_OCPolarity_High,TIM2_OCIdleState_Set);
TIM2_OC2Init(TIM2_OCMode_PWM2,TIM2_OutputState_Enable,0x0400,TIM2_OCPolarity_Low ,TIM2_OCIdleState_Set);
TIM2_CCxCmd(TIM2_Channel_1,ENABLE);
TIM2_CCxCmd(TIM2_Channel_2,ENABLE);
TIM2_BKRConfig(TIM2_OSSIState_Enable,TIM2_LockLevel_Off,TIM2_BreakState_Disable,TIM2_BreakPolarity_High,TIM2_AutomaticOutput_Enable);
TIM2_ITConfig(TIM2_IT_CC1,ENABLE);
TIM2_ITConfig(TIM2_IT_CC2,DISABLE);
TIM2_Cmd(ENABLE);
};
/**
* @brief Example firmware main entry point.
* @par Parameters:
* None
* @retval
* None
*/
void main(void)
{
/* Time base configuration */
TIM2_TimeBaseInit(TIM2_PRESCALER_2048, 65535);
/* Prescaler configuration */
TIM2_PrescalerConfig(TIM2_PRESCALER_2048, TIM2_PSCRELOADMODE_IMMEDIATE);
/* Output Compare Active Mode configuration: Channel1 */
/*
TIM2_OCMode = TIM2_OCMODE_INACTIVE
TIM2_OCPolarity = TIM2_OCPOLARITY_HIGH
TIM2_Pulse = CCR1_Val
*/
TIM2_OC1Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR1_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC1PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel2 */
/*TIM2_Pulse = CCR2_Val; */
TIM2_OC2Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR2_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC2PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel3 */
/*TIM2_Pulse = CCR3_Val */
TIM2_OC3Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR3_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC3PreloadConfig(DISABLE);
TIM2_ARRPreloadConfig(ENABLE);
/* TIM IT enable */
TIM2_ITConfig(TIM2_IT_CC1, ENABLE);
TIM2_ITConfig(TIM2_IT_CC2, ENABLE);
TIM2_ITConfig(TIM2_IT_CC3, ENABLE);
/* Set pin PG.5 & PG.6 & PG.7 to high state */
GPIO_Init(GPIOG, (GPIO_PIN_5|GPIO_PIN_6| GPIO_PIN_7), GPIO_MODE_OUT_PP_LOW_FAST);
GPIO_WriteHigh(GPIOG, GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);
/* TIM2 enable counter */
TIM2_Cmd(ENABLE);
enableInterrupts();
while (1);
}
/**
* @brief Configure Output Compare Active Mode for TIM2 Channel1, Channel2 and
* channel3
* @param None
* @retval None
*/
static void TIM2_Config(void)
{
/* Time base configuration */
TIM2_TimeBaseInit(TIM2_PRESCALER_2048, 65535);
/* Prescaler configuration */
TIM2_PrescalerConfig(TIM2_PRESCALER_2048, TIM2_PSCRELOADMODE_IMMEDIATE);
/* Output Compare Active Mode configuration: Channel1 */
/*
TIM2_OCMode = TIM2_OCMODE_INACTIVE
TIM2_OCPolarity = TIM2_OCPOLARITY_HIGH
TIM2_Pulse = CCR1_Val
*/
TIM2_OC1Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR1_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC1PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel2 */
/*TIM2_Pulse = CCR2_Val; */
TIM2_OC2Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR2_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC2PreloadConfig(DISABLE);
/* Output Compare Active Mode configuration: Channel3 */
/*TIM2_Pulse = CCR3_Val */
TIM2_OC3Init(TIM2_OCMODE_INACTIVE, TIM2_OUTPUTSTATE_ENABLE,CCR3_Val, TIM2_OCPOLARITY_HIGH);
TIM2_OC3PreloadConfig(DISABLE);
TIM2_ARRPreloadConfig(ENABLE);
/* TIM IT enable */
TIM2_ITConfig(TIM2_IT_CC1, ENABLE);
TIM2_ITConfig(TIM2_IT_CC2, ENABLE);
TIM2_ITConfig(TIM2_IT_CC3, ENABLE);
/* TIM2 enable counter */
TIM2_Cmd(ENABLE);
}
/**
* @brief Configure TIM1,2,3 peripherals
* @param None
* @retval None
*/
static void TIM_Config(void)
{
/* TIM1 configuration:
- TIM1CLK is set to 2 MHz, the TIM2 Prescaler is equal to 15 so the TIM1 counter
clock used is 2 MHz / (15 + 1) = 125 000 Hz
- TIM1 Channel 1 output frequency = TIM1CLK / (TIM1_PERIOD + 1) * (TIM1_PRESCALER + 1)
= 2 000 000 / 256 * 16 = 488.28 Hz */
/* Time Base configuration */
TIM1_TimeBaseInit(TIM1_PRESCALER, TIM1_CounterMode_Up, TIM1_PERIOD, TIM1_REPETITION_COUNTER);
/* TIM1 Channel 1 Configuration in PWM2 mode */
TIM1_OC1Init(TIM1_OCMode_PWM2, TIM1_OutputState_Enable, TIM1_OutputNState_Disable, TIM1_CCR1_VAL,
TIM1_OCPolarity_Low, TIM1_OCNPolarity_Low, TIM1_OCIdleState_Set, TIM1_OCNIdleState_Set);
/* Master Mode selection: Update event */
TIM1_SelectOutputTrigger(TIM1_TRGOSource_Update);
/* TIM2 configuration:
- TIM2 is connected to TIM1 Update so TIM2CLK is equal to
TIM1 output clock / (TIM1_REPETITION_COUNTER + 1) = 488.28 / 5 = 97.65 Hz
- TIM2 Prescaler is equal to 1 so the TIM2 counter clock used is 97.65 / 1 = 97.65 Hz
- TIM2 Channel 1 output frequency = TIM2CLK / (TIM2_PERIOD + 1) * TIM2_Prescaler
= 97.65 / 3 * 1 = 32.55 Hz */
/* Time Base configuration */
TIM2_TimeBaseInit(TIM2_Prescaler_1, TIM2_CounterMode_Up, TIM2_PERIOD);
TIM2_OC1Init(TIM2_OCMode_PWM2, TIM2_OutputState_Enable, TIM2_CCR1_VAL,
TIM2_OCPolarity_Low, TIM2_OCIdleState_Reset);
/* TIM2 Slave Mode selection: Gated mode */
TIM2_SelectSlaveMode(TIM2_SlaveMode_Gated);
TIM2_SelectInputTrigger(TIM2_TRGSelection_TIM1);
/* TIM3 configuration:
- TIM3 is connected to TIM1 Update so TIM3CLK is equal to
TIM1 output clock / (TIM1_REPETITION_COUNTER + 1) = 488.28 / 5 = 97.65 Hz
- TIM3 Prescaler is equal to 1 so the TIM3 counter clock used is 97.65 / 1 = 97.65 Hz
- TIM3 Channel 1 output frequency = TIM3CLK / (TIM3_PERIOD + 1) * TIM3Prescaler
= 97.65 / 4 * 1 = 24.41 Hz */
/* Time Base configuration */
TIM3_TimeBaseInit(TIM3_Prescaler_1, TIM3_CounterMode_Up, TIM3_PERIOD);
TIM3_OC1Init(TIM3_OCMode_PWM2, TIM3_OutputState_Enable, TIM3_CCR1_VAL,
TIM3_OCPolarity_Low, TIM3_OCIdleState_Reset);
/* TIM3 Slave Mode selection: Gated mode */
TIM3_SelectSlaveMode(TIM3_SlaveMode_Gated);
TIM3_SelectInputTrigger(TIM3_TRGSelection_TIM1);
/* Main Output Enable */
TIM1_CtrlPWMOutputs(ENABLE);
TIM2_CtrlPWMOutputs(ENABLE);
TIM3_CtrlPWMOutputs(ENABLE);
/* TIM2 counter enable */
TIM2_Cmd(ENABLE);
/* TIM3 counter enable */
TIM3_Cmd(ENABLE);
/* TIM1 counter enable */
TIM1_Cmd(ENABLE);
}
