void Hardware_init( void ) {
portDISABLE_INTERRUPTS();
NP2_LEDInit(); //Initialise Blue LED
NP2_LEDOff(); //Turn off Blue LED
portENABLE_INTERRUPTS();
}
/**
* @brief Configure the hardware,
* @param None
* @retval None
*/
void Hardware_init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t PrescalerValue = 0;
NP2_LEDInit(); //Initialise Blue LED
NP2_LEDOff(); //Turn off Blue LED
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* Enable the D0 Clock */
RCC_AHB1PeriphClockCmd(NP2_D0_GPIO_CLK, ENABLE);
/* Configure the D0 pin */
GPIO_InitStructure.GPIO_Pin = NP2_D0_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_Init(NP2_D0_GPIO_PORT, &GPIO_InitStructure);
/* Connect TIM3 output to D0 pin */
GPIO_PinAFConfig(NP2_D0_GPIO_PORT, NP2_D0_PINSOURCE, GPIO_AF_TIM3);
/* Compute the prescaler value. SystemCoreClock = 168000000 - set for 500Khz clock */
PrescalerValue = (uint16_t) ((SystemCoreClock /2) / 500000) - 1;
/* Time 3 mode and prescaler configuration */
TIM_TimeBaseStructure.TIM_Period = 500000/10; //Set for 100ms (10Hz) period
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
/* Configure Timer 3 mode and prescaler */
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* PWM Mode configuration for Channel2 - set pulse width*/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //Set PWM MODE (1 or 2 - NOT CHANNEL)
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500000/1000; //1ms pulse width
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
/* Enable Output compare channel 2 */
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
/* TIM3 enable counter */
TIM_Cmd(TIM3, ENABLE);
}
/**
* @brief Initialise Hardware Peripherals used.
* @param None
* @retval None
*/
void Hardware_init() {
debug_printf("Initialising\n");
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NP2_LEDInit(); //Initialise Blue LED
NP2_LEDOff(); //Turn off Blue LED
/* Enable DO clock */
RCC_AHB1PeriphClockCmd(NP2_D0_GPIO_CLK, ENABLE);
/* Enable SYSCFG clock for interrupt hardware */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Configure D0 pin as pull down input */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Pin = NP2_D0_PIN;
GPIO_Init(NP2_D0_GPIO_PORT, &GPIO_InitStructure);
/* Connect external interrupt EXTI Line0 to DO pin */
SYSCFG_EXTILineConfig(NP2_D0_EXTI_PORT, NP2_D0_EXTI_SOURCE);
/* Configure EXTI Line0 for rising edge detection */
EXTI_InitStructure.EXTI_Line = NP2_D0_EXTI_LINE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI Line0 Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = NP2_D0_EXTI_IRQ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
