I want to use the I2C peripheral in stm32 to read a sensor without using CubeMX

Question

I am using the STM32Wb55RGv6 board to read a sensor using the i2c protocol. I want to use it without using CubeMX (.ioc file) because I am unable to use it to add it to my project (I am using one of the provided example projects: Projects\P-NUCLEO-WB55.Nucleo\Applications\Zigbee\Zigbee_APS_Router) which does not have a .ioc file.

I can't use the .ioc file to configure the peripheral so I made a new project, set up the I2c peripheral and wrote code to read the sensor. Then I copied the code generated by CubeMX, void MX_I2C1_Init(void), over to the new project.

Whenever I try to read the sensor in the test project I made to test the sensor it read fine, so I know the sensor is connected the right way and the code to read the sensor is fine as well. But when I try to read the sensor in my new project, which does not use CubeMX it returns HAL_ERROR.

/* I2C init function */
void MX_I2C1_Init(void)
{

    /* USER CODE BEGIN I2C1_Init 0 */
    GPIO_InitTypeDef GPIO_InitStruct;

    /* Configure I2C pins */
    GPIO_InitStruct.Pin       = GPIO_PIN_9 | GPIO_PIN_10;
    GPIO_InitStruct.Mode      = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull      = GPIO_PULLUP;
    GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* USER CODE END I2C1_Init 1 */
    hi2c1.Instance = I2C1;
    hi2c1.Init.Timing = 0x00000E14;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    if (HAL_I2C_Init(&hi2c1) != HAL_OK)
    {
        Error_Handler();
    }

    /** Configure Analogue filter  */
    if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
    {
        Error_Handler();
    }

    /** Configure Digital filter*/
    if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
    {
        Error_Handler();
    }
    /* USER CODE BEGIN I2C1_Init 2 */

    /* USER CODE END I2C1_Init 2 */
}
/* I2C init function */

besided copying this code I also went into the stm32wbxx_hal_conf.h file and enabled i2c there.

Answer 1

But when I try to read the sensor in my new project, which does not use CubeMX it returns HAL_ERROR.

HAL has many dependencies and it is pointless to use it without generating projects using Cube.

Not only .h files have to be included, but also project-wide definitions set.

Use Cube to generate startup code - then use HAL manually