CL-PS7111-VC-A View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CL-PS7111-VC-A

Low-Power System-on-a-Chip

Cirrus Logic 

CL-PS7111

Low-Power System-on-a-Chip

;

set little endian,32bit code, 32bit data

LDR r0, =InitialMmuConfig

MCR ArmMmuCP,0,r0,ArmMmuControl,c0

;

set the cpu to SVC32 mode

MRS r0,CPSR

;read psw

BIC r0, r0,#ArmMaskMode;remove the mode

ORR r0, r0,#ArmSVCMode;set to supervisory 32 bit mode

MSR CPSR,r0

;

;

initialize HW control

UARTEnable

ldr

r12,=HwBaseAddress

mov

r0,#HwControlUartEnable

;Enable UART

str

r0,[r12,#HwControl]

ldr

r1,=HwStatus2

add

r1,r1,r12

ldr

r2,[r1];read system flag2

tst

r2,#CLKMOD

ldreq r0,=UartValue;load 18 mhz value if bit not set

ldrne r0,=UartValue_13;load 13 mhz value if bit set

str

r0,[r12,#HwUartControl];initialise Uart

;

Send ready signal

ldr

r0,=startflag

strb r0,[r12,#HwUartData];send ready

;

receive the data

ldr

r3,=count

ldr

r2,=BufferAddress

September 1997

PRELIMINARY DATA BOOK v2.0

97

APPENDIX A–BOOT CODE

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