Texas Instruments TLV1562 manual Software Overview

Software Overview

ADCOUNT	.usect ”.variabl”, 1
ADMEM	.usect ”.variabl”, 1
CR0_SEND	.usect ”.variabl”, 1
CR1_SEND	.usect ”.variabl”, 1
CR_PROBLEM	.usect ”.variabl”, 1
ZERO	.usect ”.variabl”, 1
ADSAMPLE	.usect ”.variabl”,1

* TLC5618 conversation

SERIAL_SEND .usect ”.variabl”, 1

* other
TEMP	.usect ”.variabl”, 1

*Address Decoder constants:

RD_CALIBRATION .set 00001h

ADC	.set	00002h
DAC1	.set	00003h
DEACTIVE	.set	00000h

;counter for one channel

;points to act. memory save location

;sent value to register CR0 of the ADC

;sent value to register CR1 of the ADC

;problem with initialization of this mode

;when repeated (reset)

;the value zero to send a ”Zero Dummy”

;last read sample from the ADC

;serial output send word

;temporary variable, can be changed anywhere during the program

;activate A1 when RD_CALIBRATION is choosen

;activate A2 when TLV1562 is choosen

;activate A3 when DAC1 is choosen

;deactivate the address lines A0, A1 and A2

* set timing mode (use od IRQ, or timer)

POLLING_DRV	.set	00001h	; software polls the INT0 pin to wait, until
			conversion is done
INT0_DRIVEN	.set	00000h	; software uses Interrupt INT0 to organize conversion
NO_INT0_SIG	.set	00000h	; INT0 signal not in use, interface is controlled
			with timing solution
SAVE_INTO_MEMORY .set		00000h	; store the samples into DSP memory, defined in
			”constants.asm”
SEND_OUT_SERIAL .set 00000h			; send the samples always to the serial DAC
SEND_OUT_PARALLEL.set 00001h			; update always the parallel DAC with the last
			sample (DAC1)
R10BIT_RESOLUT	.set	00001h	; use maximum resolution of 10 bit
R8BIT_RESOLUT	.set	00000h	; use 8 Bit resolution
R4BIT_RESOLUT	.set	00000h	; use fastest mode (4 Bit resolution)
INTERNAL_CLOCK	.set	00001h	; use the internal clock of the ADC
EXTERNAL_CLOCK	.set	00000h	; use the external clock of the ADC
AUTO_PWDN_ENABLE .set		00000h	; ADC goes into power reduced state after conversion
DIFF_INPUT_MODE .set 00000h			; use differential mode instead of single ended inputs
IME_CALIBRATION .set 00000h			; do an Internal Midscale Error Calibration
SME_CALIBRATION .set 00000h			; do a System Midscale Error Calibration
.sect ”.text”

Interfacing the TLV1562 Parallel ADC to the TMS320C54x DSP 59