DAC

DAC using interrupt mode as of now.

Two function is required to run with HAL:

• HAL_DAC_Start(m_port, m_channel);
• HAL_DAC_SetValue(m_port, m_channel, m_alignment, count_value);

HAL_DAC_Start() will call HAL_Delay(), and if used before vTaskStartScheduler(), then it will mess up with FreeRTOS causing thread to stuck in loop.

Solutin is to move HAL_DAC_Start() into setState(). But, this likey will cause minor delay in runtime since every change of DAC value will call HAL_DAC_Start() again.

Later we should implement a DMA or RTOS init() thread to be run once on system boot.