User guide

MOTOROLA DSPAUDIOEVM Evaluation Board Users Manual 59

This document contains information on a new product. Specifications and information herein are subject to change without notice.

move x:-(r6),r0 ; restore r0

rti

esai_rxe_isr ; ESAI receive exception isr

bclr #7,x:M_SAISR ; clear overrun error flag

esai_rx_isr ; ESAI receive isr

move r0,x:(r6)+ ; save r0 to the stack

move m0,x:(r6)+ ; save m0 to the stack

move #1,m0 ; modulus 2 buffer

move x:RX_PTR,r0

; load the pointer to the rx buffer

nop

jset #$6,x:M_SAISR,LeftSlot ; if left channel data don’t set flag

bset #RightReceive,x:flags ; if right channel data then set flag

LeftSlot

movep x:M_RX1,x:(r0)+ ; move rx data to buffer

move r0,x:RX_PTR ; update rx buffer pointer

move x:-(r6),m0 ; restore m0

move x:-(r6),r0 ; restore r0

rti

esai_rxls_isr ; ESAI receive last slot isr

move r0,x:(r6)+ ; save r0 to the stack

move #RX_BUFF_BASE,r0 ; reset rx buffer pointer

move r0,x:RX_PTR ; update rx buffer pointer

move x:-(r6),r0

; restore r0

rti

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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