119
Slave SPI Configuration
This routine shows how to use the SPI interrupt to interrupt a program and load two 8-bit characters from
the SPI. The program will call the SPI interrupt upon receipt of an 8-bit character, save it, and wait for one
more character. It will then save the values and return to the main program. The characters will be saved
in DATAMSB and DATALSB.
Routine
SETSLAVE
DINT
;Disable global interrupts.
MOV
#0E7h,SPICCR
;SPI reset, clock active low, / 32, 8 bits
MOV
#001h,SPICTL
;Slave mode, TALK disable, SPI INT enable
MOV
#002h,SPIPC1
;Set SPICLK.
MOV
#022h,SPIPC2
;Enable SPISOMI, SPISIMO pins for SPI.
MOV
#040h,SPIPRI
;SPI interrupts are low priority.
MOV
#067h,SPICCR
;Release SPI RESET.
EINT
;Enable global interrupts.
. . .
;Insert main part of program here. SPI
;INT will fetch characters when first
;is detected.
SPIINTR
MOV
SPIBUF,DATAMSB
;Save first character already in buffer.
WAIT
BTJZ
#040h,SPICTL,WAIT;Wait until second character is received.
MOV
SPIBUF,DATALSB
;Save second character.
RTI
;Return to main program.
*
Summary of Contents for TMS370 Series
Page 1: ...TMS370 Microcontroller Family Application Book 1996 8 Bit Microcontroller Family ...
Page 2: ...Printed in U S A February 1996 SPNA017 ...
Page 3: ...1996 Application TMS370 Microcontroller Family Book ...
Page 20: ...1 Part I Introduction ...
Page 21: ...2 ...
Page 22: ...3 Introduction Microcontroller Products Semiconductor Group Texas Instruments ...
Page 23: ...4 ...
Page 25: ...6 ...
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Page 82: ...63 Clear RAM Microcontroller Products Semiconductor Group Texas Instruments ...
Page 83: ...64 ...
Page 85: ...66 ...
Page 86: ...67 RAM Self Test on the TMS370 Microcontroller Products Semiconductor Group Texas Instruments ...
Page 87: ...68 ...
Page 89: ...70 ...
Page 90: ...71 ROM Checksum on the TMS370 Microcontroller Products Semiconductor Group Texas Instruments ...
Page 91: ...72 ...
Page 95: ...76 ...
Page 97: ...78 ...
Page 98: ...79 Bubble Sort With the TMS370 Microcontroller Products Semiconductor Group Texas Instruments ...
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Page 324: ...305 T1PWM Set Up Routines Microcontroller Products Semiconductor Group Texas Instruments ...
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Page 396: ...377 PACT Command Macros Microcontroller Products Semiconductor Group Texas Instruments ...
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