Hi @LeoWu ,
This STEVAL motherboard can be connected to various daughter boards, and the I²C2 BSP driver is more intended for NFC Tags. It's possible to use this GPIO and I²C initializations with some adaptation, but I think it will be easier to define yours.
Let's try the following:
Remove the USE_NFCTAG define.
Add in stm32l4xx_hal_msp.c :
/**
* @brief I2C MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - DMA configuration for transmission request by peripheral
* - NVIC configuration for DMA interrupt request enable
* @param None
* @return None
*/
void HAL_I2C_MspInit( I2C_HandleTypeDef* hi2c )
{
GPIO_InitTypeDef gpio_initstruct;
/* Enable I2Cx clock */
__HAL_RCC_I2C2_CLK_ENABLE( );
/* Reset I2Cx */
__HAL_RCC_I2C2_FORCE_RESET( );
__HAL_RCC_I2C2_RELEASE_RESET( );
/* Enable GPIO clock */
__HAL_RCC_GPIOB_CLK_ENABLE( );
/* I2C SCL/SDA GPIO pin configuration */
gpio_initstruct.Pin = GPIO_PIN_10 | GPIO_PIN_11;
gpio_initstruct.Mode = GPIO_MODE_AF_OD;
gpio_initstruct.Pull = GPIO_NOPULL;
gpio_initstruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
gpio_initstruct.Alternate = GPIO_AF4_I2C2;
HAL_GPIO_Init( GPIOB, &gpio_initstruct );
HAL_NVIC_SetPriority(I2C2_EV_IRQn, 5, 5);
HAL_NVIC_EnableIRQ(I2C2_EV_IRQn);
}
/**
* @brief I2C MSP DeInitialization
* @param None
* @return None
*/
void HAL_I2C_MspDeInit( I2C_HandleTypeDef* hi2c )
{
HAL_NVIC_DisableIRQ(I2C2_EV_IRQn);
HAL_GPIO_DeInit( GPIOB, GPIO_PIN_10 );
HAL_GPIO_DeInit( GPIOB, GPIO_PIN_11 );
/* Disable I2Cx clock */
__HAL_RCC_I2C2_CLK_DISABLE( );
}
add in main.c :
#include "i2c.h"
...
I2C_HandleTypeDef hi2c2;
static void MX_I2C2_Init( void );
...
int main( void )
{
...
MX_I2C2_Init();//this replaces the spi init call
i2cInit(&hi2c2);
...
}
...
static void SystemClock_Config_st25r3916(void)
{
...
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_I2C2;
PeriphClkInit.I2c2ClockSelection = RCC_I2C2CLKSOURCE_SYSCLK;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
while(1);
}
...
}
...
/**
* @brief Configures I2C interface.
* @param None
* @retval HAL status
*/
static void MX_I2C2_Init( void )
{
HAL_StatusTypeDef ret_val = HAL_OK;
if( HAL_I2C_GetState(&hi2c2) == HAL_I2C_STATE_RESET )
{
/* I2C2 peripheral configuration */
hi2c2.Instance = I2C2;
hi2c2.Init.Timing = 0x00F12981;
hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
/* Init the I2C */
ret_val = HAL_I2C_Init( &hi2c2 );
}
}
I hope this can help you.
Kind Regards.
