STM32F7_I2C_ALL_IRQ_MASK
mask = STM32F7_I2C_ALL_IRQ_MASK;
mask = STM32F7_I2C_ALL_IRQ_MASK;
stm32f7_i2c_disable_irq(i2c_dev, STM32F7_I2C_ALL_IRQ_MASK);
cr1 &= ~STM32F7_I2C_ALL_IRQ_MASK; /* Disable all interrupts */