AN2168 Freescale Semiconductor / Motorola, AN2168 Datasheet - Page 23

• Manufacturer Part Number: AN2168
• Description: ColdFire Microprocessor DMA Controller Application Note
• Manufacturer: Freescale Semiconductor / Motorola

DMA from UART Example
; This example uses a UART interrupt signal to request a DMA transfer from the
; UART receive buffer to memory. The code assumes that a chip select or DRAM
; bank has already been mapped to cover the destination address (0x20000). The
; code runs from address 0x20000000, so internal SRAM or other memory needs to
; be mapped to this region.
MBAR
RAMBAR
; DMA2 defines
SAR2
DAR2
DCR2
BCR2
DSR2
DIVR2
; UART0 defines
UMR
UCSR
UCR
URB
UACR
UIMR
UBG1
UBG2
AN2168
MOTOROLA
org
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
equ
.align 0x10
XDEF
$20000000
0x10000000
0x20000000
MBAR+0x380
MBAR+0x384
MBAR+0x388
MBAR+0x38C
MBAR+0x390
MBAR+0x394
MBAR+0x1C0
MBAR+0x1C4
MBAR+0x1C8
MBAR+0x1CC
MBAR+0x1D0
MBAR+0x1D4
MBAR+0x1D8
MBAR+0x1DC
_main
DMA from UART Example
Application Note
23