📄 main.asm
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;;***********************************************************************************************
;;***********************************************************************************************
;; FILENAME: main.asm
;;
;; Version: 1.0, Updated on 27th July 2004
;;
;; DESCRIPTION: Main file of Example_DUALADC_28pin example project
;;-----------------------------------------------------------------------------
;; Copyright (c) Cypress MicroSystems 2000-2003. All Rights Reserved.
;;*****************************************************************************
;;*****************************************************************************
;
;***********************************************************************************************
;Example_DUALADC_28pin, a CY3210-PSoCEVAL1 and CY3210-MiniEval1 board project
;
;Project Objective:
;To demonstrate the operation of the 7-13 Bit variable DUALADC,Analog-to-Digital Converter
;user module of the PSoC microcontroller.A Programmable Gain Amplifier (PGA) with unity
;gain and a LCD for display are also incorporated.
;
; Overview:
;The following changes were made to the default settings in the device editor.
;
; Select user modules
; Select an DUALADC_1 module from the ADCs category
; Select a PGA_1 module from the Amplifiers category
; Select a PGA_2 module from the Amplifiers category
; Select a LCD_1 module from the MiscDigital category
; in this example these UMs are renamed as DUALADC,PGAtoADC1,PGAtoADC2,LCD respectively.
;
; Place user modules
; 1) select DUALADC,and then select the analog column 0(digital block
; is fine with the default placement) and move ADC1 to block ASC10 to place it.
; For placing ADC2 select analog column 1 and move ADC2 to block ASD11 to place it.
; For digital block Placement details refer to the UM Datasheet.
; 2) Select PGAtoADC1 and move it to block ACB00 to place it.
; 3) Select PGAtoADC2 and move it to block ACB01 to place it.
; 4) Select LCD and select port_2 for LCD port.
;
;
;Set the global resources and UM resources in the device editor window as shown in the project
;settings below.
;
;Upon program execution all hardware settings from the device configuration are loaded
;into the device and main.asm is executed. The 24 MHz system clock is divided by 16
;(VC1) to produce a 1.5MHz clock which is provided as the clock for DUALADC.For DUALADC,
;Once the DataClock is determined CalcTime is found by the relation
;CalcTime>=DataClock*260/CPUClock,for this example DataClock is taken as 1.5MHz and
;CPUClock as 12MHz to get a CalcTime of 32.5 Dataclocks.In the device editor this is set to 35.
;The input to ADC1 at P0[1] and input to ADC2 at P0[0]is sampled at approximately 46sps,
;Sample Rate=DataClock /((2^bits+2)+CalcTime).For the example DataClock is 1.5MHz and the
;resolution is 13 Bits.
;
;By varying the dividers of VC1 and VC2 sample rates can be generated. The gain of the
;amplifier feeding the input of the ADC is unity,and this is variable from 1/16 to 16.
;
;Note:
;Apply the same clock from same source for both analog and digital blocks af ADC to make it work properly.
;More information is provided in the UM data sheet.
;
; Circuit Connections
;This example project runs on the CY3210-PSoCEVAL1 and CY3210-MiniEval1 boards or compatible
;hardware.An analog input voltage is required on port_0_1, and port_0_0 and varying this voltage
;will cause value in the LCD to change.The voltage must not exceed Vcc by more than 0.5 volts as
;per the device specification.A PGA with unity gain is used just to route the analog input to ADC
;from port pin.
;
;The table below shows the translation of input analog voltage to digital for a signed output.
;
;DC voltage Decimal value Hexadecimal equivalent
; 0 -4096 F000
; 1 -2458 F666
; 2 -820 FCCC
; 2.5 -1 FFFF
; 3 819 0333
; 4 2457 0999
; 5 4095 0FFF
;
;(while verifying the negative values displayed using calculator,prefix the hexadecimal value
;with F.for example,if the displayed value in the LCD is F666,in a 10 digit calculator enter
;FFFFFFF666 and then convert to decimal to get -2458)
;
;The table below shows the translation of input analog voltage to digital for a Unsigned output.
;
;DC voltage Decimal value Hexadecimal equivalent
; 0 0 0000
; 1 1638 0666
; 2 3276 0CCC
; 2.5 4095 0FFF
; 3 4195 1333
; 4 6553 1999
; 5 8191 1FFF
;
; Project Settings:
;
; Global resources
; VC1 = 12 ;divide 24MHz clock by 12
; VC2 = 2 ;divide VC1 by 2
; RefMux = Vdd/2 +/- Vdd/2 ;This sets the ADC to use 2.5 volts for its
; zero reference (AGND) and measures signals
; in a range that is 2.5 volts above and below AGND
;
; Analog Power = SC on/Ref High ;This turns on the clock to the SC blocks
; and sets the internal references for their best
; performance. The power level can be reduced
; once a project has been successfully developed.
;
; DUALADC
; Clock = VC1 ;counter and analog block must have same clock
; ADCResolution = 13 Bits ;can be selected from 7-13 bits
; ClockPhase = Norm ;normal phase is the default
; ADC Input1 = P0[1]
; ADC Input2 = P0[0]
; CalcTime = 35 ;obtained when integrate time selected as 20ms
; DataFormat = signed ;range between -4096 and 4095
; ClockSync = Sync to SysClk
;
; AnalogColumn_Clock_0 = VC1
; AnalogColumn_Clock_1 = VC1
;
; PGAtoADC1
; AnalogBus = Disable ;the output will not go to the analog output bus
; Gain = 1.000 ;set for unity gain
; Input = AnalogColumn_Input_MUX_0 ;input is from column mux
; Reference = AGND
;
; AnalogColumn_InputMUX_0 = PORT_0_1
;
; PGAtoADC2
; AnalogBus = Disable ;the output will not go to the analog output bus
; Gain = 1.000 ;set for unity gain
; Input = AnalogColumn_Input_MUX_1;input is from column mux
; Reference = AGND
;
; AnalogColumn_InputMUX_1 = PORT_0_0
;
; LCD
; LCDPort = Port_2 ;Connect LCd to port2
; BarGraph = Disabled
;
; Input:
;
; Pin Select Drive
; P0[1] AnalogInput High Z analog
; P0[0] AnalogInput High Z analog
; Output:
;
; Port[2]-LCD port.For pins Default settings are made when LCD is connected to a port.
;
;How to use this with the Proto board:
;
;For input Connect a Variable end of pot(R11) which is terminated at J5 in CY3210-PSoCEVAL1 board to
;P0[1] using a jumper wire and for second ADC connect a variable source to P0[0]
;Connect LCD at J9 for output.
;
;For CY3210-MiniEval1 board variable end of a pot is readily connected to port_0_1.
;For second ADC connect a variable source to P0[0]
;Note:
;For CY3210-MiniEval1 board LCD connections are to be made on the Bread board.The following table
;shows LCD connection for CY3210-MiniEval1 board:(dont forget to connect Vcc and ground to LCD and
;for nominal contrast,ground contrast control pin of LCD through 1.5K resistor)
;
;port pins LCD Pin
; P2[0] Connect to LCD_D4
; P2[1] Connect to LCD_D5
; P2[2] Connect to LCD_D6
; P2[3] Connect to LCD_D7
; P2[4] Connect to LCD_E
; P2[5] Connect to LCD_RS
; P2[6] Connect to LCD_RW
;-----------------------------------------------------------------------------
; Assembly main line
;-----------------------------------------------------------------------------
;-------------------------------------------------------------------
; Include Files
;-------------------------------------------------------------------
include "m8c.inc" ; part specific constants and macros
include "PSoCAPI.inc" ; PSoC API definitions for all User Modules
;-------------------------------------------------------------------
; String Constants
;-------------------------------------------------------------------
.LITERAL
szDisplay1:ASCIZ "ADC-1"
szDisplay2:ASCIZ "ADC-2"
.ENDLITERAL
export _main
;-----------------------------------------------------------------------------
; FUNCTION NAME: Main
;
; DESCRIPTION:
; Main function. Performs system initialization,gets the data for display and loops infinitely.
;-----------------------------------------------------------------------------
;
; ARGUMENTS: None
; RETURNS: Nothing.
; SIDE EFFECTS: None.
;
; THEORY of OPERATION or PROCEDURE:
; 1) Enable Global Interrupt
; 2) Start the user modules
; 3) Gets the data from ADC and displays the same on LCD
; 4) Loop Infinitely
_main:
M8C_EnableGInt ; Enable interrupts
call LCD_Start ; Initialize LCD
mov A,PGAtoADC1_HIGHPOWER ; Start PGA with high power
call PGAtoADC1_Start
mov A,PGAtoADC2_HIGHPOWER ; Start PGA with high power
call PGAtoADC2_Start
mov A, DUALADC_HIGHPOWER ; Set Power and Enable A/D
call DUALADC_Start
mov A, 00h ; Start A/D in continuous sampling mode
call DUALADC_GetSamples
; A/D conversion loop
_Loop1:
_Wait: ; Poll until data is complete
call DUALADC_fIsDataAvailable
jz _Wait
call DUALADC_iGetData1ClearFlag ; Get ADC1 Data (X=MSB A=LSB) and Reset flag
push A ; preserve ADC1 data in the stack
push X ; to use reg A & X for LCD positioning
mov A,00h
mov X,00h
call LCD_Position ; position the cursor
mov A,>szDisplay1 ; Load MSB part of pointer to ROM-based null
; terminated string.
mov X,<szDisplay1 ; Load LSB part of pointer to ROM-based null
; terminated string.
call LCD_PrCString ; Call function to display string at current
; LCD cursor position.
mov A,01h ; Load Row
mov X,00h ; Load Column
call LCD_Position ; position the cursor
pop X ; retrive ADC1 data
pop A
call LCD_PrHexInt ; Print an Int in Hex to current LCD position
call DUALADC_iGetData2ClearFlag ; Get ADC2 Data (X=MSB A=LSB) and Reset flag
push A ; preserve ADC2 data in the stack
push X ; to use reg A & X for LCD positioning
mov A,00h
mov X,0Bh
call LCD_Position ; position the cursor
mov A,>szDisplay2 ; Load MSB part of pointer to ROM-based null
; terminated string.
mov X,<szDisplay2 ; Load LSB part of pointer to ROM-based null
; terminated string.
call LCD_PrCString ; Call function to display string at current
; LCD cursor position.
mov A,01h ; Load Row
mov X,0Bh ; Load Column
call LCD_Position ; Print an Int in Hex to current LCD position
pop X ; retrive ADC2 data
pop A
call LCD_PrHexInt ; Print an Int in Hex to current LCD position
jmp _Loop1
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