コード例 #1
0
void i2cInit(I2CDevice index)
{
    NVIC_InitTypeDef nvic;
    I2C_InitTypeDef i2c;

    if (index > I2CDEV_MAX)
        index = I2CDEV_MAX;

    // Turn on peripheral clock, save device and index
    I2Cx = i2cHardwareMap[index].dev;
    I2Cx_index = index;
    RCC_APB1PeriphClockCmd(i2cHardwareMap[index].peripheral, ENABLE);

    // diable I2C interrrupts first to avoid ER handler triggering
    I2C_ITConfig(I2Cx, I2C_IT_EVT | I2C_IT_ERR, DISABLE);

    // clock out stuff to make sure slaves arent stuck
    // This will also configure GPIO as AF_OD at the end
    i2cUnstick();

    // Init I2C peripheral
    I2C_DeInit(I2Cx);
    I2C_StructInit(&i2c);

    I2C_ITConfig(I2Cx, I2C_IT_EVT | I2C_IT_ERR, DISABLE);               // Disable EVT and ERR interrupts - they are enabled by the first request
    i2c.I2C_Mode = I2C_Mode_I2C;
    i2c.I2C_DutyCycle = I2C_DutyCycle_2;
    i2c.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

    // Overclocking i2c, test results
    // Default speed, conform specs is 400000 (400 kHz)
    // 2.0* :  800kHz - worked without errors
    // 3.0* : 1200kHz - worked without errors
    // 3.5* : 1400kHz - failed, hangup, bootpin recovery needed
    // 4.0* : 1600kHz - failed, hangup, bootpin recovery needed
    i2c.I2C_ClockSpeed = CLOCKSPEED;

    I2C_Cmd(I2Cx, ENABLE);
    I2C_Init(I2Cx, &i2c);

    // I2C ER Interrupt
    nvic.NVIC_IRQChannel = i2cHardwareMap[index].er_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&nvic);

    // I2C EV Interrupt
    nvic.NVIC_IRQChannel = i2cHardwareMap[index].ev_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV);
    NVIC_Init(&nvic);
}
コード例 #2
0
void i2cInit(I2CDevice index)
{
    NVIC_InitTypeDef nvic;
    I2C_InitTypeDef i2c;

    if (index > I2CDEV_MAX)
        index = I2CDEV_MAX;

    // Turn on peripheral clock, save device and index
    I2Cx = i2cHardwareMap[index].dev;
    I2Cx_index = index;
    RCC_APB1PeriphClockCmd(i2cHardwareMap[index].peripheral, ENABLE);

    // diable I2C interrrupts first to avoid ER handler triggering
    I2C_ITConfig(I2Cx, I2C_IT_EVT | I2C_IT_ERR, DISABLE);

    // clock out stuff to make sure slaves arent stuck
    // This will also configure GPIO as AF_OD at the end
    i2cUnstick();

    // Init I2C peripheral
    I2C_DeInit(I2Cx);
    I2C_StructInit(&i2c);

    I2C_ITConfig(I2Cx, I2C_IT_EVT | I2C_IT_ERR, DISABLE);               // Disable EVT and ERR interrupts - they are enabled by the first request
    i2c.I2C_Mode = I2C_Mode_I2C;
    i2c.I2C_DutyCycle = I2C_DutyCycle_2;
    i2c.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

    if (i2cOverClock) {
        i2c.I2C_ClockSpeed = 800000; // 800khz Maximum speed tested on various boards without issues
    } else {
        i2c.I2C_ClockSpeed = 400000; // 400khz Operation according specs
    }

    I2C_Cmd(I2Cx, ENABLE);
    I2C_Init(I2Cx, &i2c);

    // I2C ER Interrupt
    nvic.NVIC_IRQChannel = i2cHardwareMap[index].er_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&nvic);

    // I2C EV Interrupt
    nvic.NVIC_IRQChannel = i2cHardwareMap[index].ev_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV);
    NVIC_Init(&nvic);
}
コード例 #3
0
ファイル: usb_bsp.c プロジェクト: MuesliReep/cleanflight
/**
* @brief  USB_OTG_BSP_EnableInterrupt
*         Enabele USB Global interrupt
* @param  None
* @retval None
*/
void USB_OTG_BSP_EnableInterrupt(USB_OTG_CORE_HANDLE *pdev)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PRIORITY_GROUPING);
#ifdef USE_USB_OTG_HS
  NVIC_InitStructure.NVIC_IRQChannel = OTG_HS_IRQn;
#else
  NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_IRQn;
#endif
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_USB);
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_USB);
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
#ifdef USB_OTG_HS_DEDICATED_EP1_ENABLED
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  NVIC_InitStructure.NVIC_IRQChannel = OTG_HS_EP1_OUT_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  NVIC_InitStructure.NVIC_IRQChannel = OTG_HS_EP1_IN_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
#endif
}
コード例 #4
0
uartPort_t *serialUART5(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx5Buffer[UART5_RX_BUFFER_SIZE];
    static volatile uint8_t tx5Buffer[UART5_TX_BUFFER_SIZE];
    NVIC_InitTypeDef NVIC_InitStructure;

    s = &uartPort5;
    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    s->port.rxBufferSize = UART5_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART5_TX_BUFFER_SIZE;
    s->port.rxBuffer = rx5Buffer;
    s->port.txBuffer = tx5Buffer;

    s->USARTx = UART5;

    RCC_ClockCmd(RCC_APB1(UART5), ENABLE);

    serialUARTInit(IOGetByTag(IO_TAG(UART5_TX_PIN)), IOGetByTag(IO_TAG(UART5_RX_PIN)), mode, options, GPIO_AF_5, 5);

    NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART5);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART5);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    return s;
}
コード例 #5
0
void hcsr04_init(const sonarHardware_t *initialSonarHardware)
{
    gpio_config_t gpio;
    EXTI_InitTypeDef EXTIInit;

    sonarHardware = initialSonarHardware;

#ifdef STM32F10X
    // enable AFIO for EXTI support
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#endif

#ifdef STM32F303xC
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

    /* Enable SYSCFG clock otherwise the EXTI irq handlers are not called */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif

    // trigger pin
    gpio.pin = sonarHardware->trigger_pin;
    gpio.mode = Mode_Out_PP;
    gpio.speed = Speed_2MHz;
    gpioInit(GPIOB, &gpio);

    // echo pin
    gpio.pin = sonarHardware->echo_pin;
    gpio.mode = Mode_IN_FLOATING;
    gpioInit(GPIOB, &gpio);

#ifdef STM32F10X
    // setup external interrupt on echo pin
    gpioExtiLineConfig(GPIO_PortSourceGPIOB, sonarHardware->exti_pin_source);
#endif

#ifdef STM32F303xC
    gpioExtiLineConfig(EXTI_PortSourceGPIOB, sonarHardware->exti_pin_source);
#endif

    EXTI_ClearITPendingBit(sonarHardware->exti_line);

    EXTIInit.EXTI_Line = sonarHardware->exti_line;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = sonarHardware->exti_irqn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    lastMeasurementAt = millis() - 60; // force 1st measurement in hcsr04_get_distance()
}
コード例 #6
0
ファイル: sonar_hcsr04.c プロジェクト: gurkenfolie/inav
void hcsr04_set_sonar_hardware(void)
{
#if !defined(UNIT_TEST)

#ifdef STM32F10X
    // enable AFIO for EXTI support
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#endif

#ifdef STM32F303xC
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

    /* Enable SYSCFG clock otherwise the EXTI irq handlers are not called */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif

    gpio_config_t gpio;
    // trigger pin
    gpio.pin = sonarHcsr04Hardware.trigger_pin;
    gpio.mode = Mode_Out_PP;
    gpio.speed = Speed_2MHz;
    gpioInit(sonarHcsr04Hardware.trigger_gpio, &gpio);
    // echo pin
    gpio.pin = sonarHcsr04Hardware.echo_pin;
    gpio.mode = Mode_IN_FLOATING;
    gpioInit(sonarHcsr04Hardware.echo_gpio, &gpio);

#ifdef STM32F10X
    // setup external interrupt on echo pin
    gpioExtiLineConfig(GPIO_PortSourceGPIOB, sonarHcsr04Hardware.exti_pin_source);
#endif

#ifdef STM32F303xC
    gpioExtiLineConfig(EXTI_PortSourceGPIOB, sonarHcsr04Hardware.exti_pin_source);
#endif

    EXTI_ClearITPendingBit(sonarHcsr04Hardware.exti_line);

    EXTI_InitTypeDef EXTIInit;
    EXTIInit.EXTI_Line = sonarHcsr04Hardware.exti_line;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = sonarHcsr04Hardware.exti_irqn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif
}
コード例 #7
0
static void hmc5883lConfigureDataReadyInterruptHandling(void)
{
#ifdef USE_MAG_DATA_READY_SIGNAL

    if (!(hmc5883Config->exti_port_source && hmc5883Config->exti_pin_source)) {
        return;
    }
#ifdef STM32F10X
    // enable AFIO for EXTI support
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#endif

#ifdef STM32F303xC
    /* Enable SYSCFG clock otherwise the EXTI irq handlers are not called */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif

#ifdef STM32F10X
    gpioExtiLineConfig(hmc5883Config->exti_port_source, hmc5883Config->exti_pin_source);
#endif

#ifdef STM32F303xC
    gpioExtiLineConfig(hmc5883Config->exti_port_source, hmc5883Config->exti_pin_source);
#endif

#ifdef ENSURE_MAG_DATA_READY_IS_HIGH
    uint8_t status = GPIO_ReadInputDataBit(hmc5883Config->gpioPort, hmc5883Config->gpioPin);
    if (!status) {
        return;
    }
#endif

    registerExti15_10_CallbackHandler(MAG_DATA_READY_EXTI_Handler);

    EXTI_ClearITPendingBit(hmc5883Config->exti_line);

    EXTI_InitTypeDef EXTIInit;
    EXTIInit.EXTI_Line = hmc5883Config->exti_line;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = hmc5883Config->exti_irqn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_MAG_DATA_READY);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_MAG_DATA_READY);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif
}
コード例 #8
0
uartPort_t *serialUART3(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx3Buffer[UART3_RX_BUFFER_SIZE];
    static volatile uint8_t tx3Buffer[UART3_TX_BUFFER_SIZE];

    s = &uartPort3;
    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    s->port.rxBufferSize = UART3_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART3_TX_BUFFER_SIZE;
    s->port.rxBuffer = rx3Buffer;
    s->port.txBuffer = tx3Buffer;

    s->USARTx = USART3;

#ifdef USE_UART3_RX_DMA
    s->rxDMAChannel = DMA1_Channel3;
    s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->RDR;
#endif
#ifdef USE_UART3_TX_DMA
    s->txDMAChannel = DMA1_Channel2;
    s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->TDR;
#endif

    RCC_ClockCmd(RCC_APB1(USART3), ENABLE);

#if defined(USE_UART3_TX_DMA) || defined(USE_UART3_RX_DMA)
    RCC_AHBClockCmd(RCC_AHB(DMA1), ENABLE);
#endif

    serialUARTInit(IOGetByTag(IO_TAG(UART3_TX_PIN)), IOGetByTag(IO_TAG(UART3_RX_PIN)), mode, options, GPIO_AF_7, 3);

#ifdef USE_UART3_TX_DMA
    // DMA TX Interrupt
    dmaSetHandler(DMA1_CH2_HANDLER, handleUsartTxDma, NVIC_PRIO_SERIALUART3_TXDMA, (uint32_t)&uartPort3);
#endif

#ifndef USE_UART3_RX_DMA
    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART3_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART3_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif

    return s;
}
コード例 #9
0
// USART2 - GPS or Spektrum or ?? (RX + TX by IRQ)
uartPort_t *serialUART2(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx2Buffer[UART2_RX_BUFFER_SIZE];
    static volatile uint8_t tx2Buffer[UART2_TX_BUFFER_SIZE];

    NVIC_InitTypeDef NVIC_InitStructure;

    s = &uartPort2;
    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    s->port.rxBufferSize = UART2_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART2_TX_BUFFER_SIZE;
    s->port.rxBuffer = rx2Buffer;
    s->port.txBuffer = tx2Buffer;

    s->USARTx = USART2;

    s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->DR;
    s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->DR;

    RCC_ClockCmd(RCC_APB1(USART2), ENABLE);

    // UART2_TX    PA2
    // UART2_RX    PA3
    if (options & SERIAL_BIDIR) {
        IOInit(IOGetByTag(IO_TAG(PA2)), OWNER_SERIAL_TX, 2);
        IOConfigGPIO(IOGetByTag(IO_TAG(PA2)), IOCFG_AF_OD);
    } else {
        if (mode & MODE_TX) {
            IOInit(IOGetByTag(IO_TAG(PA2)), OWNER_SERIAL_TX, 2);
            IOConfigGPIO(IOGetByTag(IO_TAG(PA2)), IOCFG_AF_PP);
        }

        if (mode & MODE_RX) {
            IOInit(IOGetByTag(IO_TAG(PA3)), OWNER_SERIAL_RX, 2);
            IOConfigGPIO(IOGetByTag(IO_TAG(PA3)), IOCFG_IPU);
        }
    }

    // RX/TX Interrupt
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART2);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART2);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    return s;
}
コード例 #10
0
ファイル: dma_stm32f4xx.c プロジェクト: rayone/betaflight-1
void dmaSetHandler(dmaHandlerIdentifier_e identifier, dmaCallbackHandlerFuncPtr callback, uint32_t priority, uint32_t userParam)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_AHB1PeriphClockCmd(dmaDescriptors[identifier].rcc, ENABLE);
    dmaDescriptors[identifier].irqHandlerCallback = callback;
    dmaDescriptors[identifier].userParam = userParam;

    NVIC_InitStructure.NVIC_IRQChannel = dmaDescriptors[identifier].irqN;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(priority);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(priority);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
コード例 #11
0
void configureMPUDataReadyInterruptHandling(void)
{
#ifdef USE_MPU_DATA_READY_SIGNAL

#ifdef STM32F10X
    // enable AFIO for EXTI support
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#endif

#ifdef STM32F303xC
    /* Enable SYSCFG clock otherwise the EXTI irq handlers are not called */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif

#ifdef STM32F10X
    gpioExtiLineConfig(mpu6000Config->exti_port_source, mpu6000Config->exti_pin_source);
#endif

#ifdef STM32F303xC
    gpioExtiLineConfig(mpu6000Config->exti_port_source, mpu6000Config->exti_pin_source);
#endif

#ifdef ENSURE_MPU_DATA_READY_IS_LOW
    uint8_t status = GPIO_ReadInputDataBit(mpu6000Config->gpioPort, mpu6000Config->gpioPin);
    if (status) {
        return;
    }
#endif

    EXTI_ClearITPendingBit(mpu6000Config->exti_line);

    EXTI_InitTypeDef EXTIInit;
    EXTIInit.EXTI_Line = mpu6000Config->exti_line;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = mpu6000Config->exti_irqn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_MPU_DATA_READY);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_MPU_DATA_READY);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif
}
コード例 #12
0
ファイル: dma.c プロジェクト: 4712/cleanflight
void dmaSetHandler(dmaIdentifier_e identifier, dmaCallbackHandlerFuncPtr callback, uint32_t priority, uint32_t userParam)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    const int index = DMA_IDENTIFIER_TO_INDEX(identifier);
    /* TODO: remove this - enforce the init */
    RCC_AHBPeriphClockCmd(DMA_RCC(dmaDescriptors[index].dma), ENABLE);
    dmaDescriptors[index].irqHandlerCallback = callback;
    dmaDescriptors[index].userParam = userParam;
    dmaDescriptors[index].completeFlag = dmaFlag_IT_TCIF(dmaDescriptors[index].ref);

    NVIC_InitStructure.NVIC_IRQChannel = dmaDescriptors[index].irqN;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(priority);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(priority);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
コード例 #13
0
ファイル: exti.c プロジェクト: Liquidas/betaflight
void EXTIConfig(IO_t io, extiCallbackRec_t *cb, int irqPriority, EXTITrigger_TypeDef trigger)
{
    int chIdx;
    chIdx = IO_GPIOPinIdx(io);
    if(chIdx < 0)
        return;
    extiChannelRec_t *rec = &extiChannelRecs[chIdx];
    int group = extiGroups[chIdx];

    rec->handler = cb;
#if defined(STM32F10X)
    GPIO_EXTILineConfig(IO_GPIO_PortSource(io), IO_GPIO_PinSource(io));
#elif defined(STM32F303xC)
    SYSCFG_EXTILineConfig(IO_EXTI_PortSourceGPIO(io), IO_EXTI_PinSource(io));
#elif defined(STM32F4)
    SYSCFG_EXTILineConfig(IO_EXTI_PortSourceGPIO(io), IO_EXTI_PinSource(io));
#else
# warning "Unknown CPU"
#endif
    uint32_t extiLine = IO_EXTI_Line(io);

    EXTI_ClearITPendingBit(extiLine);

    EXTI_InitTypeDef EXTIInit;
    EXTIInit.EXTI_Line = extiLine;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = trigger;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    if(extiGroupPriority[group] > irqPriority) {
        extiGroupPriority[group] = irqPriority;

        NVIC_InitTypeDef NVIC_InitStructure;
        NVIC_InitStructure.NVIC_IRQChannel = extiGroupIRQn[group];
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(irqPriority);
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(irqPriority);
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
    }
}
コード例 #14
0
void ws2811LedStripHardwareInit(void)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    uint16_t prescalerValue;

#ifdef CC3D
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
#else
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    /* GPIOA Configuration: TIM3 Channel 1 as alternate function push-pull */
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
#endif

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    /* Compute the prescaler value */
    prescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
    /* Time base configuration */
    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Period = 29; // 800kHz
    TIM_TimeBaseStructure.TIM_Prescaler = prescalerValue;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_OCStructInit(&TIM_OCInitStructure);
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

    TIM_CtrlPWMOutputs(TIM3, ENABLE);

    /* configure DMA */
    /* DMA clock enable */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    /* DMA1 Channel6 Config */
    DMA_DeInit(DMA1_Channel6);

    DMA_StructInit(&DMA_InitStructure);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&TIM3->CCR1;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ledStripDMABuffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = WS2811_DMA_BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

    DMA_Init(DMA1_Channel6, &DMA_InitStructure);

    /* TIM3 CC1 DMA Request enable */
    TIM_DMACmd(TIM3, TIM_DMA_CC1, ENABLE);

    DMA_ITConfig(DMA1_Channel6, DMA_IT_TC, ENABLE);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_WS2811_DMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_WS2811_DMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    const hsvColor_t hsv_white = {  0, 255, 255};
    setStripColor(&hsv_white);
    ws2811UpdateStrip();
}
コード例 #15
0
ファイル: dma_stm32f7xx.c プロジェクト: Carlitoscadiz/inav
void dmaSetHandler(dmaHandlerIdentifier_e identifier, dmaCallbackHandlerFuncPtr callback, uint32_t priority, uint32_t userParam)
{
    //clock
    //RCC_AHB1PeriphClockCmd(dmaDescriptors[identifier].rcc, ENABLE);

    do {
        __IO uint32_t tmpreg;
        SET_BIT(RCC->AHB1ENR, dmaDescriptors[identifier].rcc);
        /* Delay after an RCC peripheral clock enabling */
        tmpreg = READ_BIT(RCC->AHB1ENR, dmaDescriptors[identifier].rcc);
        UNUSED(tmpreg);
    } while(0);

    dmaDescriptors[identifier].irqHandlerCallback = callback;
    dmaDescriptors[identifier].userParam = userParam;


    HAL_NVIC_SetPriority(dmaDescriptors[identifier].irqN, NVIC_PRIORITY_BASE(priority), NVIC_PRIORITY_SUB(priority));
    HAL_NVIC_EnableIRQ(dmaDescriptors[identifier].irqN);
}
コード例 #16
0
void i2cInit(I2CDevice device)
{
    if (device == I2CINVALID) {
        return;
    }

    i2cDevice_t *pDev = &i2cDevice[device];

    const i2cHardware_t *hardware = pDev->hardware;

    if (!hardware) {
        return;
    }

    IO_t scl = pDev->scl;
    IO_t sda = pDev->sda;

    IOInit(scl, OWNER_I2C_SCL, RESOURCE_INDEX(device));
    IOInit(sda, OWNER_I2C_SDA, RESOURCE_INDEX(device));

    // Enable RCC
    RCC_ClockCmd(hardware->rcc, ENABLE);

    i2cUnstick(scl, sda);

    // Init pins
#ifdef STM32F7
    IOConfigGPIOAF(scl, pDev->pullUp ? IOCFG_I2C_PU : IOCFG_I2C, GPIO_AF4_I2C);
    IOConfigGPIOAF(sda, pDev->pullUp ? IOCFG_I2C_PU : IOCFG_I2C, GPIO_AF4_I2C);
#else
    IOConfigGPIO(scl, IOCFG_AF_OD);
    IOConfigGPIO(sda, IOCFG_AF_OD);
#endif

    // Init I2C peripheral

    I2C_HandleTypeDef *pHandle = &pDev->handle;

    memset(pHandle, 0, sizeof(*pHandle));

    pHandle->Instance = pDev->hardware->reg;

    /// TODO: HAL check if I2C timing is correct

    if (pDev->overClock) {
        // 800khz Maximum speed tested on various boards without issues
        pHandle->Init.Timing = 0x00500D1D;
    } else {
        pHandle->Init.Timing = 0x00500C6F;
    }

    pHandle->Init.OwnAddress1 = 0x0;
    pHandle->Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    pHandle->Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    pHandle->Init.OwnAddress2 = 0x0;
    pHandle->Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    pHandle->Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;

    HAL_I2C_Init(pHandle);

    // Enable the Analog I2C Filter
    HAL_I2CEx_ConfigAnalogFilter(pHandle, I2C_ANALOGFILTER_ENABLE);

    // Setup interrupt handlers
    HAL_NVIC_SetPriority(hardware->er_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER));
    HAL_NVIC_EnableIRQ(hardware->er_irq);
    HAL_NVIC_SetPriority(hardware->ev_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV));
    HAL_NVIC_EnableIRQ(hardware->ev_irq);
}
コード例 #17
0
ファイル: sonar_hcsr04.c プロジェクト: Tkumars/cleanflight
void hcsr04_init(const sonarHardware_t *initialSonarHardware, sonarRange_t *sonarRange)
{
    sonarHardware = initialSonarHardware;
    sonarRange->maxRangeCm = HCSR04_MAX_RANGE_CM;
    sonarRange->detectionConeDeciDegrees = HCSR04_DETECTION_CONE_DECIDEGREES;
    sonarRange->detectionConeExtendedDeciDegrees = HCSR04_DETECTION_CONE_EXTENDED_DECIDEGREES;

#if !defined(UNIT_TEST)
    gpio_config_t gpio;
    EXTI_InitTypeDef EXTIInit;

#ifdef STM32F10X
    // enable AFIO for EXTI support
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#endif

#ifdef STM32F303xC
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

    /* Enable SYSCFG clock otherwise the EXTI irq handlers are not called */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif

    // trigger pin
    gpio.pin = sonarHardware->trigger_pin;
    gpio.mode = Mode_Out_PP;
    gpio.speed = Speed_2MHz;
    gpioInit(GPIOB, &gpio);

    // echo pin
    gpio.pin = sonarHardware->echo_pin;
    gpio.mode = Mode_IN_FLOATING;
    gpioInit(GPIOB, &gpio);

#ifdef STM32F10X
    // setup external interrupt on echo pin
    gpioExtiLineConfig(GPIO_PortSourceGPIOB, sonarHardware->exti_pin_source);
#endif

#ifdef STM32F303xC
    gpioExtiLineConfig(EXTI_PortSourceGPIOB, sonarHardware->exti_pin_source);
#endif

    EXTI_ClearITPendingBit(sonarHardware->exti_line);

    EXTIInit.EXTI_Line = sonarHardware->exti_line;
    EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTIInit.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTIInit.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTIInit);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = sonarHardware->exti_irqn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SONAR_ECHO);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    lastMeasurementAt = millis() - 60; // force 1st measurement in hcsr04_get_distance()
#else
    lastMeasurementAt = 0; // to avoid "unused" compiler warning
#endif
}
コード例 #18
0
ファイル: bus_i2c_hal.c プロジェクト: AlienWiiBF/betaflight
void i2cInit(I2CDevice device)
{
    /*## Configure the I2C clock source. The clock is derived from the SYSCLK #*/
//    RCC_PeriphCLKInitTypeDef  RCC_PeriphCLKInitStruct;
//    RCC_PeriphCLKInitStruct.PeriphClockSelection = i2cHardwareMap[device].clk;
//    RCC_PeriphCLKInitStruct.I2c1ClockSelection = i2cHardwareMap[device].clk_src;
//    HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);

    switch (device) {
    case I2CDEV_1:
        __HAL_RCC_I2C1_CLK_ENABLE();
        break;
    case I2CDEV_2:
        __HAL_RCC_I2C2_CLK_ENABLE();
        break;
    case I2CDEV_3:
        __HAL_RCC_I2C3_CLK_ENABLE();
        break;
    case I2CDEV_4:
        __HAL_RCC_I2C4_CLK_ENABLE();
        break;
    default:
        break;
    }
    if (device == I2CINVALID)
        return;

    i2cDevice_t *i2c;
    i2c = &(i2cHardwareMap[device]);

    //I2C_InitTypeDef i2cInit;

    IO_t scl = IOGetByTag(i2c->scl);
    IO_t sda = IOGetByTag(i2c->sda);

    IOInit(scl, OWNER_I2C_SCL, RESOURCE_INDEX(device));
    IOInit(sda, OWNER_I2C_SDA, RESOURCE_INDEX(device));

    // Enable RCC
    RCC_ClockCmd(i2c->rcc, ENABLE);


    i2cUnstick(scl, sda);

    // Init pins
#ifdef STM32F7
    IOConfigGPIOAF(scl, IOCFG_I2C, i2c->af);
    IOConfigGPIOAF(sda, IOCFG_I2C, i2c->af);
#else
    IOConfigGPIO(scl, IOCFG_AF_OD);
    IOConfigGPIO(sda, IOCFG_AF_OD);
#endif
    // Init I2C peripheral
    HAL_I2C_DeInit(&i2cHandle[device].Handle);

    i2cHandle[device].Handle.Instance             = i2cHardwareMap[device].dev;
    /// TODO: HAL check if I2C timing is correct
    i2cHandle[device].Handle.Init.Timing          = 0x00B01B59;
    //i2cHandle[device].Handle.Init.Timing          = 0x00D00E28; /* (Rise time = 120ns, Fall time = 25ns) */
    i2cHandle[device].Handle.Init.OwnAddress1     = 0x0;
    i2cHandle[device].Handle.Init.AddressingMode  = I2C_ADDRESSINGMODE_7BIT;
    i2cHandle[device].Handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    i2cHandle[device].Handle.Init.OwnAddress2     = 0x0;
    i2cHandle[device].Handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    i2cHandle[device].Handle.Init.NoStretchMode   = I2C_NOSTRETCH_DISABLE;


    HAL_I2C_Init(&i2cHandle[device].Handle);
    /* Enable the Analog I2C Filter */
    HAL_I2CEx_ConfigAnalogFilter(&i2cHandle[device].Handle,I2C_ANALOGFILTER_ENABLE);

    HAL_NVIC_SetPriority(i2cHardwareMap[device].er_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER));
    HAL_NVIC_EnableIRQ(i2cHardwareMap[device].er_irq);
    HAL_NVIC_SetPriority(i2cHardwareMap[device].ev_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV));
    HAL_NVIC_EnableIRQ(i2cHardwareMap[device].ev_irq);
}
コード例 #19
0
uartPort_t *serialUSART1(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx1Buffer[UART1_RX_BUFFER_SIZE];
    static volatile uint8_t tx1Buffer[UART1_TX_BUFFER_SIZE];
    NVIC_InitTypeDef NVIC_InitStructure;
    GPIO_InitTypeDef  GPIO_InitStructure;

    s = &uartPort1;
    s->port.vTable = uartVTable;
    
    s->port.baudRate = baudRate;
    
    s->port.rxBuffer = rx1Buffer;
    s->port.txBuffer = tx1Buffer;
    s->port.rxBufferSize = UART1_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART1_TX_BUFFER_SIZE;
    
#ifdef USE_USART1_RX_DMA
    s->rxDMAChannel = DMA1_Channel5;
#endif
    s->txDMAChannel = DMA1_Channel4;

    s->USARTx = USART1;

    s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->RDR;
    s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->TDR;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = (options & SERIAL_INVERTED) ? GPIO_PuPd_DOWN : GPIO_PuPd_UP;

    if (options & SERIAL_BIDIR) {
        GPIO_InitStructure.GPIO_Pin = UART1_TX_PIN;
        GPIO_InitStructure.GPIO_OType = (options & SERIAL_INVERTED) ? GPIO_OType_PP : GPIO_OType_OD;
        GPIO_PinAFConfig(UART1_GPIO, UART1_TX_PINSOURCE, UART1_GPIO_AF);
        GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
        if(!(options & SERIAL_INVERTED))
            GPIO_SetBits(UART1_GPIO, UART1_TX_PIN);   // OpenDrain output should be inactive
    } else {
        if (mode & MODE_TX) {
            GPIO_InitStructure.GPIO_Pin = UART1_TX_PIN;
            GPIO_PinAFConfig(UART1_GPIO, UART1_TX_PINSOURCE, UART1_GPIO_AF);
            GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
        }

        if (mode & MODE_RX) {
            GPIO_InitStructure.GPIO_Pin = UART1_RX_PIN;
            GPIO_PinAFConfig(UART1_GPIO, UART1_RX_PINSOURCE, UART1_GPIO_AF);
            GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
        }
    }

    // DMA TX Interrupt
    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART1_TXDMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART1_TXDMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

#ifndef USE_USART1_RX_DMA
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART1_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART1_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif

    return s;
}
コード例 #20
0
void i2cInit(I2CDevice device)
{
    if (device == I2CINVALID)
        return;

    i2cDevice_t *i2c;
    i2c = &(i2cHardwareMap[device]);

    NVIC_InitTypeDef nvic;
    I2C_InitTypeDef i2cInit;

    IO_t scl = IOGetByTag(i2c->scl);
    IO_t sda = IOGetByTag(i2c->sda);

    IOInit(scl, OWNER_I2C_SCL, RESOURCE_INDEX(device));
    IOInit(sda, OWNER_I2C_SDA, RESOURCE_INDEX(device));

    // Enable RCC
    RCC_ClockCmd(i2c->rcc, ENABLE);

    I2C_ITConfig(i2c->dev, I2C_IT_EVT | I2C_IT_ERR, DISABLE);

    i2cUnstick(scl, sda);

    // Init pins
#ifdef STM32F4
    IOConfigGPIOAF(scl, IOCFG_I2C, GPIO_AF_I2C);
    IOConfigGPIOAF(sda, IOCFG_I2C, GPIO_AF_I2C);
#else
    IOConfigGPIO(scl, IOCFG_I2C);
    IOConfigGPIO(sda, IOCFG_I2C);
#endif

    I2C_DeInit(i2c->dev);
    I2C_StructInit(&i2cInit);

    I2C_ITConfig(i2c->dev, I2C_IT_EVT | I2C_IT_ERR, DISABLE);               // Disable EVT and ERR interrupts - they are enabled by the first request
    i2cInit.I2C_Mode = I2C_Mode_I2C;
    i2cInit.I2C_DutyCycle = I2C_DutyCycle_2;
    i2cInit.I2C_OwnAddress1 = 0;
    i2cInit.I2C_Ack = I2C_Ack_Enable;
    i2cInit.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

    if (i2c->overClock) {
        i2cInit.I2C_ClockSpeed = 800000; // 800khz Maximum speed tested on various boards without issues
    } else {
        i2cInit.I2C_ClockSpeed = 400000; // 400khz Operation according specs
    }

    I2C_Cmd(i2c->dev, ENABLE);
    I2C_Init(i2c->dev, &i2cInit);

    I2C_StretchClockCmd(i2c->dev, ENABLE);


    // I2C ER Interrupt
    nvic.NVIC_IRQChannel = i2c->er_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER);
    nvic.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&nvic);

    // I2C EV Interrupt
    nvic.NVIC_IRQChannel = i2c->ev_irq;
    nvic.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV);
    nvic.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV);
    NVIC_Init(&nvic);
}
コード例 #21
0
uartPort_t *serialUSART3(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx3Buffer[UART3_RX_BUFFER_SIZE];
    static volatile uint8_t tx3Buffer[UART3_TX_BUFFER_SIZE];
    NVIC_InitTypeDef NVIC_InitStructure;
    GPIO_InitTypeDef  GPIO_InitStructure;

    s = &uartPort3;
    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    s->port.rxBufferSize = UART3_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART3_TX_BUFFER_SIZE;
    s->port.rxBuffer = rx3Buffer;
    s->port.txBuffer = tx3Buffer;

    s->USARTx = USART3;

#ifdef USE_USART3_RX_DMA
    s->rxDMAChannel = DMA1_Channel3;
    s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->RDR;
#endif
#ifdef USE_USART3_TX_DMA
    s->txDMAChannel = DMA1_Channel2;
    s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->TDR;
#endif

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

#if defined(USE_USART3_TX_DMA) || defined(USE_USART3_RX_DMA)
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
#endif

    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;

    if (options & SERIAL_BIDIR) {
        GPIO_InitStructure.GPIO_Pin = UART3_TX_PIN;
        GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
        GPIO_PinAFConfig(UART3_GPIO, UART3_TX_PINSOURCE, UART3_GPIO_AF);
        GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
    } else {
        if (mode & MODE_TX) {
            GPIO_InitStructure.GPIO_Pin = UART3_TX_PIN;
            GPIO_PinAFConfig(UART3_GPIO, UART3_TX_PINSOURCE, UART3_GPIO_AF);
            GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
        }

        if (mode & MODE_RX) {
            GPIO_InitStructure.GPIO_Pin = UART3_RX_PIN;
            GPIO_PinAFConfig(UART3_GPIO, UART3_RX_PINSOURCE, UART3_GPIO_AF);
            GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
        }
    }

#ifdef USE_USART3_TX_DMA
    // DMA TX Interrupt
    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART3_TXDMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART3_TXDMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif

#ifndef USE_USART3_RX_DMA
    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART3_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART3_RXDMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif

    return s;
}
コード例 #22
0
ファイル: usb_bsp.c プロジェクト: MuesliReep/cleanflight
void USB_OTG_BSP_Init(USB_OTG_CORE_HANDLE *pdev)
{
  GPIO_InitTypeDef GPIO_InitStructure;

#ifndef USE_ULPI_PHY
#ifdef USB_OTG_FS_LOW_PWR_MGMT_SUPPORT
  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
#endif
#endif


 #ifdef USE_USB_OTG_FS

  NVIC_InitTypeDef NVIC_InitStructure;
#ifdef USE_USB_OTG_HS
  NVIC_InitStructure.NVIC_IRQChannel = OTG_HS_IRQn;
#else
  NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_IRQn;
#endif
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_USB);
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_USB);
  NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
  NVIC_Init(&NVIC_InitStructure);

  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA , ENABLE);

  /* Configure SOF VBUS ID DM DP Pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 |
        GPIO_Pin_12;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  //GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_OTG1_FS) ;
  //GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_OTG1_FS) ;
  GPIO_PinAFConfig(GPIOA,GPIO_PinSource11,GPIO_AF_OTG1_FS) ;
  GPIO_PinAFConfig(GPIOA,GPIO_PinSource12,GPIO_AF_OTG1_FS) ;

  /* this for ID line debug */
#ifdef VBUS_SENSING_ENABLED
#ifdef COLIBRI
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
#endif
#ifdef REVO
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
#endif
#endif





  /*GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_OTG1_FS) ;
*/
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_OTG_FS, ENABLE) ;
 #else // USE_USB_OTG_HS

  #ifdef USE_ULPI_PHY // ULPI
  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB |
                         RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOH |
                           RCC_AHB1Periph_GPIOI, ENABLE);


  GPIO_PinAFConfig(GPIOA,GPIO_PinSource3, GPIO_AF_OTG2_HS) ; // D0
  GPIO_PinAFConfig(GPIOA,GPIO_PinSource5, GPIO_AF_OTG2_HS) ; // CLK
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource0, GPIO_AF_OTG2_HS) ; // D1
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource1, GPIO_AF_OTG2_HS) ; // D2
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource5, GPIO_AF_OTG2_HS) ; // D7
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_OTG2_HS) ; // D3
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_OTG2_HS) ; // D4
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource12,GPIO_AF_OTG2_HS) ; // D5
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_OTG2_HS) ; // D6
  GPIO_PinAFConfig(GPIOH,GPIO_PinSource4, GPIO_AF_OTG2_HS) ; // NXT
  GPIO_PinAFConfig(GPIOI,GPIO_PinSource11,GPIO_AF_OTG2_HS) ; // DIR
  GPIO_PinAFConfig(GPIOC,GPIO_PinSource0, GPIO_AF_OTG2_HS) ; // STP

  // CLK
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 ;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  // D0
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3  ;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);



  // D1 D2 D3 D4 D5 D6 D7
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1  |
    GPIO_Pin_5 | GPIO_Pin_10 |
      GPIO_Pin_11| GPIO_Pin_12 |
        GPIO_Pin_13 ;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOB, &GPIO_InitStructure);


  // STP
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0  ;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  //NXT
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOH, &GPIO_InitStructure);


  //DIR
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 ;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOI, &GPIO_InitStructure);


  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_OTG_HS |
                         RCC_AHB1Periph_OTG_HS_ULPI, ENABLE) ;

  #else
   #ifdef USE_I2C_PHY
  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOB , ENABLE);
  /* Configure RESET INTN SCL SDA (Phy/I2C) Pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 |
    GPIO_Pin_1 |
      GPIO_Pin_10 |
        GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOB,GPIO_PinSource0,GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource1,GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_OTG2_FS);
  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_OTG_HS, ENABLE) ;

   #else

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB , ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12  |
    GPIO_Pin_13 |
      GPIO_Pin_14 |
        GPIO_Pin_15;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOB,GPIO_PinSource12, GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_OTG2_FS) ;
  GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_OTG2_FS) ;
  RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_OTG_HS, ENABLE) ;
   #endif
  #endif // USE_ULPI_PHY

 #endif //USB_OTG_HS


  /* enable the PWR clock */
  RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, ENABLE);

  /* Configure the Key button in EXTI mode */
  //STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI);

#ifdef USB_OTG_FS_LOW_PWR_MGMT_SUPPORT
  EXTI_ClearITPendingBit(EXTI_Line18);

  EXTI_InitStructure.EXTI_Line = EXTI_Line18;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  EXTI_ClearITPendingBit(EXTI_Line18);

  NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_WKUP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  EXTI_ClearITPendingBit(EXTI_Line18);
#endif

#ifdef USB_OTG_HS_LOW_PWR_MGMT_SUPPORT
  EXTI_ClearITPendingBit(EXTI_Line20);

  EXTI_InitStructure.EXTI_Line = EXTI_Line20;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  EXTI_ClearITPendingBit(EXTI_Line20);

  NVIC_InitStructure.NVIC_IRQChannel = OTG_HS_WKUP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  EXTI_ClearITPendingBit(EXTI_Line20);
#endif

  EXTI_ClearITPendingBit(EXTI_Line0);
}
コード例 #23
0
// USART1 - Telemetry (RX/TX by DMA)
uartPort_t *serialUART1(uint32_t baudRate, portMode_t mode, portOptions_t options)
{
    uartPort_t *s;
    static volatile uint8_t rx1Buffer[UART1_RX_BUFFER_SIZE];
    static volatile uint8_t tx1Buffer[UART1_TX_BUFFER_SIZE];

    s = &uartPort1;
    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    s->port.rxBuffer = rx1Buffer;
    s->port.txBuffer = tx1Buffer;
    s->port.rxBufferSize = UART1_RX_BUFFER_SIZE;
    s->port.txBufferSize = UART1_TX_BUFFER_SIZE;

    s->USARTx = USART1;

#ifdef USE_UART1_RX_DMA
    dmaInit(DMA1_CH5_HANDLER, OWNER_SERIAL_RX, 1);
    s->rxDMAChannel = DMA1_Channel5;
    s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->DR;
#endif
    s->txDMAChannel = DMA1_Channel4;
    s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->DR;

    RCC_ClockCmd(RCC_APB2(USART1), ENABLE);

    // UART1_TX    PA9
    // UART1_RX    PA10
    if (options & SERIAL_BIDIR) {
        IOInit(IOGetByTag(IO_TAG(PA9)), OWNER_SERIAL_TX, 1);
        IOConfigGPIO(IOGetByTag(IO_TAG(PA9)), IOCFG_AF_OD);
    } else {
        if (mode & MODE_TX) {
            IOInit(IOGetByTag(IO_TAG(PA9)), OWNER_SERIAL_TX, 1);
            IOConfigGPIO(IOGetByTag(IO_TAG(PA9)), IOCFG_AF_PP);
        }

        if (mode & MODE_RX) {
            IOInit(IOGetByTag(IO_TAG(PA10)), OWNER_SERIAL_RX, 1);
            IOConfigGPIO(IOGetByTag(IO_TAG(PA10)), IOCFG_IPU);
        }
    }

    // DMA TX Interrupt
    dmaInit(DMA1_CH4_HANDLER, OWNER_SERIAL_TX, 1);
    dmaSetHandler(DMA1_CH4_HANDLER, uart_tx_dma_IRQHandler, NVIC_PRIO_SERIALUART1_TXDMA, (uint32_t)&uartPort1);

#ifndef USE_UART1_RX_DMA
    // RX/TX Interrupt
    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART1);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART1);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
#endif

    return s;
}
コード例 #24
0
void transponderIrHardwareInit(void)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHBPeriphClockCmd(TRANSPONDER_GPIO_AHB_PERIPHERAL, ENABLE);

    GPIO_PinAFConfig(TRANSPONDER_GPIO, TRANSPONDER_PIN_SOURCE,  TRANSPONDER_GPIO_AF);

    /* Configuration alternate function push-pull */
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = TRANSPONDER_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(TRANSPONDER_GPIO, &GPIO_InitStructure);

    RCC_APB2PeriphClockCmd(TRANSPONDER_TIMER_APB2_PERIPHERAL, ENABLE);

    /* Time base configuration */
    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Period = 156;
    TIM_TimeBaseStructure.TIM_Prescaler = 0;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TRANSPONDER_TIMER, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_OCStructInit(&TIM_OCInitStructure);
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
#ifdef TRANSPONDER_INVERTED
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
#else
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
#endif
    TIM_OC1Init(TRANSPONDER_TIMER, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TRANSPONDER_TIMER, TIM_OCPreload_Enable);

    TIM_CtrlPWMOutputs(TRANSPONDER_TIMER, ENABLE);

    /* configure DMA */
    /* DMA clock enable */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    /* DMA1 Channel6 Config */
    DMA_DeInit(TRANSPONDER_DMA_CHANNEL);

    DMA_StructInit(&DMA_InitStructure);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&TRANSPONDER_TIMER->CCR1;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)transponderIrDMABuffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = TRANSPONDER_DMA_BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

    DMA_Init(TRANSPONDER_DMA_CHANNEL, &DMA_InitStructure);

    TIM_DMACmd(TRANSPONDER_TIMER, TIM_DMA_CC1, ENABLE);

    DMA_ITConfig(TRANSPONDER_DMA_CHANNEL, DMA_IT_TC, ENABLE);

    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_InitStructure.NVIC_IRQChannel = TRANSPONDER_IRQ;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_TRANSPONDER_DMA);
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_TRANSPONDER_DMA);
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}