void Config() { //System clock at power up is HSI/8 = 16MHz/8 = 2MHz //CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); //set HSI/4 = 4MHz SysClk to Core and Memory, minimum clock = 125KHz for CLK_SYSCLKDiv_128 //PWR_PVDCmd(ENABLE); //Power voltage detector and brownout Reset unit supply current 2,6uA //PWR_PVDLevelConfig(PWR_PVDLevel_2V26); //set Programmable voltage detector threshold to 2,26V //PWR_GetFlagStatus(PWR_FLAG_PVDOF); //checks whether the specified PWR flag is set or not //Configure external interrupts - BTN1 and BTN2 presses //EXTI_SetPinSensitivity(EXTI_Pin_2, EXTI_Trigger_Falling_Low); //EXTI_SetPinSensitivity(EXTI_Pin_4, EXTI_Trigger_Falling_Low); //EXTI_SelectPort(EXTI_Port_B); //EXTI_SetHalfPortSelection(EXTI_HalfPort_B_MSB, ENABLE); // Timer 4 Configuration CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE); // 8bit: used for system periodic flags and timeouts TIM4_TimeBaseInit(TIM4_Prescaler_16, 125); // Overflow at 1ms, 2MHz/16/125 = 1000 TIM4_ITConfig(TIM4_IT_Update, ENABLE); TIM4_Cmd(ENABLE); // Timer 2 Configuration CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, ENABLE); // 16bit: used for runtime measurement TIM2_TimeBaseInit(TIM2_Prescaler_2, TIM2_CounterMode_Up, 0xFFFF); // timebase of 1us, 2MHz/2=1M TIM2_Cmd(ENABLE); // Timer3 Configuration CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE); TIM3_TimeBaseInit(TIM3_Prescaler_2, TIM3_CounterMode_Up, 0xFFFF); // 1us timebase @ 2MHz system clock TIM3_ICInit(TIM3_Channel_2, TIM3_ICPolarity_Falling, TIM3_ICSelection_IndirectTI, TIM3_ICPSC_Div1, 0); TIM3_ICInit(TIM3_Channel_1, TIM3_ICPolarity_Rising, TIM3_ICSelection_DirectTI, TIM3_ICPSC_Div1, 0); TIM3_SelectInputTrigger(TIM3_TRGSelection_TI1FP1); TIM3_SelectSlaveMode(TIM3_SlaveMode_Reset); // Reset timer on selected trigger signal TIM3_ITConfig(TIM3_IT_CC1, ENABLE); TIM3_ITConfig(TIM3_IT_CC2, ENABLE); TIM3_Cmd(ENABLE); /* Output PP High - bicolor LED to GND */ GPIO_Init(LED_PORT, LED_PIN1, GPIO_Mode_Out_PP_Low_Slow); GPIO_Init(LED_PORT, LED_PIN2, GPIO_Mode_Out_PP_Low_Slow); /* Input pull up no IT - onboard Button, external pull-up */ GPIO_Init(BTN1_PORT, BTN1_PIN, GPIO_Mode_In_FL_No_IT); /* RFM85W pins */ GPIO_Init(RFM_DATA_PORT, RFM_DATA_PIN, GPIO_Mode_In_FL_No_IT); /* DEBUG pin */ GPIO_Init(DEBUG_PIN_PORT, DEBUG_PIN_PIN, GPIO_Mode_Out_PP_Low_Fast); /* H bridge outputs */ GPIO_Init(PMOS_L_PORT, PMOS_L_PIN, GPIO_Mode_Out_PP_High_Fast); GPIO_Init(PMOS_R_PORT, PMOS_R_PIN, GPIO_Mode_Out_PP_High_Fast); GPIO_Init(NMOS_L_PORT, NMOS_L_PIN, GPIO_Mode_Out_PP_Low_Fast); GPIO_Init(NMOS_R_PORT, NMOS_R_PIN, GPIO_Mode_Out_PP_Low_Fast); }
/** * @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); }