Configuration Steps to Enable ABM mode

Disable SLCD and disable all the previous running modes as given in xpro_lcd_clear_all()

Write the appropriate configuration for the ABM mode mentioned in the above section (Automated Bit Mapping Mode Initialization) using the function slcd_set_automated_bit()

Disable the frame counter by using the function slcd_disable_frame_counter(FCx)

Write the configurations of the frame counter associated with this mode in FCx.OVF and FCx.PB by using the function slcd_set_frame_counter(FCx,0,0x1) and enable it by using the function slcd_enable_frame_counter(FCx)

Enable the automated character mapping mode by writing the CTRLC. ABMEN bit using the function slcd_enable_automated_bit()

Configure DMA resource parameters and allocate resource using the function configure_dma_resource(&example_resource)

Configure the DMA descriptor parameters using the function setup_transfer_descriptor(&example_resource)

Create the call back function, Register call back, and enable the callback if the application requires

Call the function dma_start_transfer_job(&example_resource). After that upon the ABM peripheral trigger occurs the DMA transfer will be initiated automatically.

Since DMA transaction has configured as linked descriptor, the exit from the continuous transaction is implemented in the function dma_callback() by using dma_break variable. This step includes disabling the ABM mode and freeing the DMA channel used for ABM mode.