469
Introduction
This program is a master program and is resident in master MCU. It transmits another program from master
to slave MCU. It is mainly for programming data EEPROMs in slave mode. It is assumed that the slave
MCU has a bootstrap program for receiving the data from the SPI.
Routine
;
;Define the registers
;
SPICCR
.EQUP030
;SPI communications control register
SPICTL
.EQUP031
;SPI control register
SPIBUF
.EQUP037
;SPI receive data buffer register
SPIDAT
.EQUP039
;SPI serial data register
SPIPC1
.EQUP03D
;SPI port control register 1
SPIPC2
.EQUP03E
;SPI port control register 2
SPIPRI
.EQUP03F
;SPI priority
EECTL
.EQU101AH
;EEPROM control register
LAST
.EQU7300H
;RAM program BEGIN ADDR.
INDEX
.EQUR05
;Index register
TEMP1
.EQUR06
;Temporary register
TEMP2
.EQUR07
;Temporary register
TEMP3
.EQUR18
;Temporary register
REALST
.EQUR10
;R09:R10 has the address of data in master.
STRT
.EQUR12
;R11:R12 has the address of data in slave to be
;programmed.
LENGTH
.EQUR14
;R13:R14 has the length of data to be programmed.
MAX
.EQUR15
;R15 has the maximum No. of bytes that can be
;transmitted.
COMMAND
.EQUR16
;R16 has the command word.
MASK
.EQU80H
;Mask for EEPROM programming condition
;
;Program to transmit program
;Remember that the last byte of program has to be sent first. The last byte
;sent must be first byte of program. In the beginning, dummy bits may have to
;be sent, depending on the program length.
;
.TEXT
7000H
MOV
#0A0H,B
;Initialize the stack.
LDSP
START
MOV
#0FFH,SPICCR
;Initialize SPI.
MOV
#07FH,SPICCR
;Program SPI for 8-bit data.
MOV
#07,SPICTL
;Program SPI for master and enable int.
MOV
#02,SPIPC1
;Enable SPICLk pin.
MOV
#030H,SPIPC2
;enable SPISIMO and SPISOMI pin.
MOV
#0E0H,B
;Maximum No. of bytes to be transferred.
START0
MOV
*LAST–1[B],A
;Start transmitting from last byte.
MOV
A,SPIDAT
;Put the byte to be transmitted in
;buffer.
LOOP1
BTJZ
#40H,SPICTL,LOOP1
;Check if transmitted.
MOV
SPIBUF,A
;Read to clear interrupt flag.
DJNZ
B,START0
;Continue until complete
;
;Program to transmit data
;First, set up the digital I/O reg. to set up for expanded microcomputer
;mode.
MOV
#0FFH,P021
;Set up port A for data bus.
MOV
#0FFH,P025
;Set up port B for low address bus.
MOV
#0FFH,P029
;Set up port C for high address bus.
MOV
#0,P02C
;Set up port D for function A
MOV
#0FFH,P02D
;in expansion mode.
;
*
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 81: ...62 ...
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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Page 492: ...473 Part V External Memory Expansion Examples ...
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