Analog Devices ADSP-BF59x Blackfin, Hardware Reference Manual, Page: 484 / 772

Programming Model
13-30 ADSP-BF59x Blackfin Processor Hardware Reference
Figure 13-9. SPI DMA Flow Chart (Part 1 of 3)
WRITE DESIRED DMA CHANNEL'S
DMA_PERIPHERAL_MAP TO SET AS SPI.
(REPLACE ALL MENTION OF DMA7 REGISTER NAMES
IN THIS FLOW CHART WITH CHOSEN DMAx PREFIX.)
DMA7_CONFIG
FLOW = ?
WRITE DMA7_CONFIG TO CONFIGURE DMA ENGINE
0x4 ARRAY
0x6 SMALL LIST
0x7 LARGE LIST
0x0 STOP
0x1 AUTOBUFFER
POPULATE
DESCRIPTORS
IN MEMORY
WRITE DMA REGISTERS:
DMA7_START_ADDR
DMA7_X_COUNT
DMA7_X_MODIFY
DMA7_CONFIG'S NDSIZE FIELD DETERMINES
WHICH DMA REGISTERS TO INITIALIZE STATICALLY
DMA7_CONFIG
FLOW = ?
0x6 SMALL LIST
0x7 LARGE LIST
0x4 ARRAY
SET
DMA7_CURR_DESC_PTR
TO ADDRESS OF
FIRST DESCRIPTOR
SET
DMA7_NEXT_DESC_PTR
TO ADDRESS OF
FIRST DESCRIPTOR
A
WRITE TO PORT REGISTERS TO ENABLE SPI
SIGNALS AND SELECT THE REQUIRED SIGNALS.