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AD28MSP02 Datenblatt(PDF) 5 Page - Analog Devices |
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AD28MSP02 Datenblatt(HTML) 5 Page - Analog Devices |
5 / 20 page AD28msp02 REV. 0 –5– Note that the ADSP-2101’s SPORT0 communicates with the AD28msp02’s SPORT while the ADSP-2101’s Flag Output (FO) is used to signal the AD28msp02’s DATA/CNTRL input. SPORT1 on the ADSP-2101 must be configured for flags and interrupts in this system. Figure 6 shows an ADSP-2101 assembly language program that initializes the AD28msp02 and implements digital loopback through the DSP processor. SDO SDOFS SCLK DATA/CNTRL SDI SDIFS AD28msp02 DR0 RFS0 SCLK0 FO DT0 TFS0 ADSP-2101 Figure 5. AD28msp02-to-ADSP-2101 Interface { This ADSP-2101 program initializes the AD28msp02 } { and executes a loopback, or talk-through, routine. } .MODULE/ABS = 0/BOOT = 0 test1; resetv: JUMP begin; {restart} RTI; RTI; RTI; irq2v: RTI; RTI; RTI; RTI; {IRQ2} st0x: RTI; RTI; RTI; RTI; {SPORT0 Tx} sr0x: ax0 = rx0; {SPORT0 Rx} tx0 = ax0; RTI; RTI; irq1v: RTI; RTI; RTI; RTI; {irq1} irq0v: RTI; RTI; RTI; RTI; {irq0} timerv: RTI; RTI; RTI; RTI; begin: RESET FLAG OUT; AX0 = 0x2A0F; {Configure ADSP-2101 SPORT0 for } DM (0x3FF6) = AX0; { ext. SCLK, ext. RFS, int. TFS } AX0 = 0x101F; { Enable ADSP-2101 SPORT0, } DM (0x3FFF) = AX0; { configure SPORT1 for Flag Out } IMASK= 0x10; AX0 = 0x30; { Write control word to take} TX0 = AX0; { AD28msp02 out of powerdown } IDLE; NOP; IMASK= 0x08; SET FLAG OUT; wait: JUMP wait; { Wait for receive interrupt } NOP; .ENDMOD; Figure 6. ADSP-2101 Digital Loopback Routine |
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