3 initializing just the esai receiver section, Initializing just the esai receiver section -50 – Freescale Semiconductor DSP56366 User Manual
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ESAI Initialization Examples
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
8-50
Freescale Semiconductor
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Configure the control registers TCCR and TCR according to the operating mode, making sure to
clear the transmitter enable bits (TE0 - TE5). TPR must remain set.
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Take the transmitter section out of the personal reset state by clearing TPR.
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Write first data to the transmitters which will be used during operation. This step is needed even if
DMA is used to service the transmitters.
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Enable the transmitters by setting their TE bits.
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Data is transmitted only when the transmitter enable (TEx) bit is set and after the occurrence of
frame sync signal (either internally or externally generated). The transmitter outputs remain
tri-stated after TEx bit is set until the frame sync occurs.
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From now on the transmitters are operating and can be serviced either by polling, interrupts, or
DMA.
8.6.3
Initializing Just the ESAI Receiver Section
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It is assumed that the ESAI is operational; that is, at least one pin is defined as an ESAI pin.
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The receiver section should be in its personal reset state (RPR = 1).
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Configure the control registers RCCR and RCR according to the operating mode, making sure to
clear the receiver enable bits (RE0 - RE3). RPR must remain set.
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Take the receiver section out of the personal reset state by clearing RPR.
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Enable the receivers by setting their RE bits.
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From now on the receivers are operating and can be serviced either by polling, interrupts, or DMA.