The Problem of Debugging about STM32F042C6

Posted: 6/21/2017 8:28:24 AM

Joined: 6/21/2017


I bought STM32F04C6 from internet.( Look STM32F0406 datasheet or buy it please click this link: STM32F042C6T6 ) And I made some troubles when I debug I2C Slave mode. Could anybody here give me some feasible suggestions?

Trouble:The I2C Slave mode cannot enter into interrupt.

The program I set:

 [code]void STM32_config_iic_slavemode()
   uint32_t tmpreg = 0;
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    // Disable I2C1 Peripheral
    I2C1->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_PE);
    //---------------------------- Deinitialize I2C1 clock ------------------
    // Reset I2C1 device clock in order to avoid non-cleared error flags 
    // Disable I2C1 device clock
    //---------------------------- GPIO pins configuration ------------------
    // Initialize I2C1 GPIO
    // Enable I2C1 SCL and SDA Pin Clock
    // Connect PXx to I2C_SCL 
    // Connect PXx to I2C_SDA
    // Set GPIO frequency to 50MHz
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    // Select Alternate function mode
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    //Select output Open Drain type
    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
    // Disable internal Pull-up
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
    // Initialize I2C1 SCL Pin
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_Init((GPIO_TypeDef*)GPIOB, &GPIO_InitStructure);
    // Initialize I2C1 SDA Pin 
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
    GPIO_Init((GPIO_TypeDef*)GPIOB, &GPIO_InitStructure);
    // Initialize I2C1 clock
    // Reset I2C1 device clock in order to avoid non-cleared error flags
    //__I2C_RCC_RESET(CPAL_I2C_CLK [Device]);
    // Enable I2C1 device clock
    //I2C1 FILTERS Configuration
    // Get the I2C1 CR1 value
    tmpreg = I2C1->CR1;
    // Clear I2C1 CR1 register
    tmpreg &= CR1_CLEAR_MASK;
    // Configure I2C1: analog and digital filter
    // Set ANFOFF bit according to I2C_AnalogFilter value
    // Set DFN bits according to I2C_DigitalFilter value
    tmpreg |= (uint32_t)0x00000000 | (0 << 8); // Analog noise filter enabled, Digital filter disabled
    //tmpreg |= I2C_CR1_NOSTRETCH; // disable clcok stretching  
    // Write to I2C1 CR1
    I2C1->CR1 = tmpreg;
    //I2C1 TIMING Configuration
    // Configure I2C1: Timing
    // Set TIMINGR bits according to I2C_Timing
    // Write to I2C1 TIMING
    //I2C1->TIMINGR = 0x00000000 & TIMING_CLEAR_MASK;
    // Enable I2C1 Peripheral
    I2C1->CR1 |= I2C_CR1_PE;
    //I2C1 OAR1 Configuration
    // Clear tmpreg local variable
    tmpreg = 0;
    // Clear OAR1 register
    I2C1->OAR1 = (uint32_t)tmpreg;
    // Clear OAR2 register
    I2C1->OAR2 = (uint32_t)tmpreg;
    // Configure I2C1: Own Address1 and acknowledged address
    // Set OA1MODE bit according to I2C_AcknowledgedAddress value
    // Set OA1 bits according to I2C_OwnAddress1 value
    tmpreg = (uint32_t)((uint32_t)0x00000000 | \
    // Write to I2C1 OAR1
    I2C1->OAR1 = tmpreg;
    // Enable Own Address1 acknowledgement
    I2C1->OAR1 |= I2C_OAR1_OA1EN;
    //I2C1 MODE Configuration
    // Configure I2C1: mode
    // Set SMBDEN and SMBHEN bits according to I2C_Mode value
    tmpreg = 0;
    // Write to I2C1 CR1
    I2C1->CR1 |= tmpreg;
    //I2C1 ACK Configuration
    //Get the I2C1 CR2 value
    tmpreg = I2C1->CR2;
    //Clear I2C1 CR2 register
    tmpreg &= CR2_CLEAR_MASK;
    //Configure I2C1: acknowledgement
    //Set NACK bit according to I2C_Ack value
    tmpreg |= (uint32_t)0x00008000;
    // Write to I2C1 CR2
    I2C1->CR2 = tmpreg;
    //I2C1->OAR2 |= I2C_OAR2_OA2EN;
        //I2C1->CR1 |= I2C_CR1_GCEN;
        // Enable slave byte control
    //I2C1->CR1 |= I2C_CR1_SBC;
    I2C1->CR1 |= (I2C_CR1_ADDRIE | I2C_CR1_STOPIE | I2C_CR1_TXIE | I2C_CR1_RXIE);
    //---------------------------- Peripheral and DMA interrupts Initialization ------------------
    // Initialize I2C1 interrupts
    /* Enable the IRQ channel */
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    /* Configure NVIC for I2C1 Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = I2C1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPriority = 2;
    // If I2C ERR Interrupt Option Bit not selected
    // Initialize Timeout procedure

My interrupt set is : address interrupt, interrupt receiving, interrupt sending. Whats wrong?

Thank you.

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