;-------------------------------------------------------------------------------
;  FC430 ES417 Demo - Digital Fan Control w/ Tachometer (TI CCE ASM version)
;
;  Description: Drives cooling fan speed based on thermistor temperature
;  Results: Displays tachometer and temperature on SoftBaugh SBLCDA4 LCD
;  ACLK = UCLK0 = LFXT1 = 32.768 kHz
;  MCLK = SMCLK = 32*ACLK = DCO = ~1.048576 MHz
;  (external watch crystal is required on XIN XOUT for ACLK)
;
;
;                  MSP430F417
;           ------------------------
;      /|\  |                   XIN|--- |
;       |   |                      |  32kHz
;       ----|RST               XOUT|--- |
;           |                      |
;   LED <---|P1.0        P2.1/TA1.1|---> PWM
;           |                      |
; Rsens --->|P1.4              P2.0|<--- TACH
;           |                      |
;  Rref --->|P1.5                  |
;           |                      |
;    Cm --->|P1.6/CA0              |
;           |                      |
;           |                      |
;           |  P2.2 -- P4.4, P5.1  |
;           ------------------------
;           | | | | | | | | | | | |
;           v v v v v v v v v v v v
;           ------------------------
;           |  SBLCDA4 LCD DISPLAY |
;           ------------------------
;
;
; Randy Wu
; Texas Instruments Inc.
; November 2005
; Built with TI CCE PRO Version: 1.00
;
; THIS PROGRAM IS PROVIDED "AS IS". TI MAKES NO WARRANTIES OR
; REPRESENTATIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
; INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
; FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR
; COMPLETENESS OF RESPONSES, RESULTS AND LACK OF NEGLIGENCE.
; TI DISCLAIMS ANY WARRANTY OF TITLE, QUIET ENJOYMENT, QUIET
; POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY
; INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO THE PROGRAM OR
; YOUR USE OF THE PROGRAM.
;
; IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
; CONSEQUENTIAL OR INDIRECT DAMAGES, HOWEVER CAUSED, ON ANY
; THEORY OF LIABILITY AND WHETHER OR NOT TI HAS BEEN ADVISED
; OF THE POSSIBILITY OF SUCH DAMAGES, ARISING IN ANY WAY OUT
; OF THIS AGREEMENT, THE PROGRAM, OR YOUR USE OF THE PROGRAM.
; EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED TO, COST OF
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; AGGREGATE LIABILITY UNDER THIS AGREEMENT OR ARISING OUT OF
; YOUR USE OF THE PROGRAM EXCEED FIVE HUNDRED DOLLARS
; (U.S.$500).
;
; Unless otherwise stated, the Program written and copyrighted
; by Texas Instruments is distributed as "freeware".  You may,
; only under TI's copyright in the Program, use and modify the
; Program without any charge or restriction.  You may
; distribute to third parties, provided that you transfer a
; copy of this license to the third party and the third party
; agrees to these terms by its first use of the Program. You
; must reproduce the copyright notice and any other legend of
; ownership on each copy or partial copy, of the Program.
;
; You acknowledge and agree that the Program contains
; copyrighted material, trade secrets and other TI proprietary
; information and is protected by copyright laws,
; international copyright treaties, and trade secret laws, as
; well as other intellectual property laws.  To protect TI's
; rights in the Program, you agree not to decompile, reverse
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; versions of the Program to a human-readable form.  You agree
; that in no event will you alter, remove or destroy any
; copyright notice included in the Program.  TI reserves all
; rights not specifically granted under this license. Except
; as specifically provided herein, nothing in this agreement
; shall be construed as conferring by implication, estoppel,
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;
; You may not use the Program in non-TI devices.
;-------------------------------------------------------------------------------

            .cdecls C,LIST,"msp430x417.h"

;********************************** CONSTANTS **********************************

; Port1 Pin Configuration
ACTIVITY    .equ     BIT0                   ; System activity LED
THERM       .equ     BIT4                   ; Thermistor used for temp. sensor
REF         .equ     BIT5                   ; Charges reference cap 4 SlopeA/D
CAIN        .equ     BIT6                   ; CA0 input on P1.6

; Port2 Pin Configuration
TACH        .equ     BIT0                   ; Frequency Generator signal of fan
PWM         .equ     BIT1                   ; PWM signal to vary fan duty cycles

; System variables
PERIOD050USEC   .equ       52               ; assuming ~1.048576 MHz DCO clock
DUTYCYCLE_030   .equ       15               ; duty cycle =  30%
DUTYCYCLE_045   .equ       23               ; duty cycle =  45%
DUTYCYCLE_060   .equ       31               ; duty cycle =  60%
DUTYCYCLE_080   .equ       41               ; duty cycle =  80%
DUTYCYCLE_100   .equ (PERIOD050USEC-1)      ; duty cycle = 100%

PERIOD5MSEC     .equ  5243                  ; 5 msec worth of SMCLK = DCO tics

PULSESPERREV    .equ     2                  ; # of FG pulses per 1 rev. of fan
TEMP_CALFACTOR  .equ    10                  ; temp. sensor calibration factor

FANSLEVEL0  .equ     0                      ; System level 0 (minimum cooling)
FANSLEVEL1  .equ     1                      ; System level 1
FANSLEVEL2  .equ     2                      ; System level 2
FANSLEVEL3  .equ     3                      ; System level 3
FANSLEVEL4  .equ     4                      ; System level 4
FANSLEVEL5  .equ     5                      ; System level 5 (maximum cooling)

DEGFWIDTH   .equ     7                      ; # of degrees F per level change

PWM_L0      .equ -50                        ; 0th temp boundary (deg F)
PWM_L1toL2  .equ  70                        ; 1st temp boundary (deg F)
PWM_L2toL3  .equ (PWM_L1toL2+DEGFWIDTH)     ; 2nd temp boundary (deg F)
PWM_L3toL4  .equ (PWM_L2toL3+DEGFWIDTH)     ; 3rd temp boundary (deg F)
PWM_L4toL5  .equ (PWM_L3toL4+DEGFWIDTH)     ; 4th temp boundary (deg F)
PWM_L5      .equ (PWM_L3toL4+DEGFWIDTH)     ; 5th temp boundary (deg F)

;********************** CONSTANT DATA: LCD SEGMENT TABLE ***********************

; ES417-to-SBLCDA4: LCD segment memory map
; LCDM1: 1F 1G 1E DP1  1A 1B 1C 1D
; LCDM2: 2F 2G 2E DP2  2A 2B 2C 2D
; LCDM3: 3F 3G 3E COL3 3A 3B 3C 3D
; LCDM4: 4F 4G 4E DP4  4A 4B 4C 4D
; LCDM5: 5F 5G 5E COL5 5A 5B 5C 5D
; LCDM6: 6F 6G 6E DP6  6A 6B 6C 6D
; LCDM7: 7F 7G 7E DP7  7A 7B 7C 7D
; LCDM8: F1 F2 F3 F4 F5 PR P4 P3
; LCDM9: AU AR AD AL PL P0 P1 P2
; LCDM10: BT B1 B0 BB ANT A2 A1 A0
; LCDM11: DOLL ERR MINUS MEM ENV TX RX 8BC

h           .equ    0x80
e           .equ    0x40                    ;  AAAA
g           .equ    0x20                    ; F    B
f           .equ    0x10                    ; F    B
d           .equ    0x08                    ;  GGGG
c           .equ    0x04                    ; E    C
b           .equ    0x02                    ; E    C
a           .equ    0x01                    ;  DDDD


;************************ CONSTANT DATA: LOOK UP TABLES ************************

;-------------------------------------------------------------------------------
; Initialized Constant Values
            .sect   ".const"
            .align  2
;-------------------------------------------------------------------------------

LCD_Table:
            .field  a+b+c+d+e+f,8           ; Displays "0"
            .field  b+c,8                   ; Displays "1"
            .field  a+b+d+e+g,8             ; Displays "2"
            .field  a+b+c+d+g,8             ; Displays "3"
            .field  b+c+f+g,8               ; Displays "4"
            .field  a+c+d+f+g,8             ; Displays "5"
            .field  a+c+d+e+f+g,8           ; Displays "6"
            .field  a+b+c,8                 ; Displays "7"
            .field  a+b+c+d+e+f+g,8         ; Displays "8"
            .field  a+b+c+d+f+g,8           ; Displays "9"
            .field  a+b+c+e+f+g,8           ; Displays "A"
            .field  0,8                     ; Displays <Blank>
            .field  a+d+e+f,8               ; Displays "C"
            .field  a+b+f+g,8               ; Displays "degrees" o
            .field  a+d+e+f+g,8             ; Displays "E"
            .field  a+e+f+g,8               ; Displays "F"
            .field  h,8                     ; Displays ":" or "."
            .field  g,8                     ; Displays "-"
            .field  f+g+e+d,8               ; Displays "t"

;-------------------------------------------------------------------------------
;       Resistance table, K ohms from 99 down to 32 degrees F.
;       NOTE: Values must be calculated based on a specific type of thermistor
;-------------------------------------------------------------------------------
RES_TAB     .field  1900,16                 ; 99 F
            .field  1900,16
            .field  2000,16
            .field  2100,16
            .field  2200,16                 ; 95 F
            .field  2200,16
            .field  2300,16
            .field  2400,16
            .field  2500,16
            .field  2600,16                 ; 90 F
            .field  2700,16
            .field  2800,16
            .field  2900,16
            .field  3000,16
            .field  3100,16                 ; 85 F
            .field  3200,16
            .field  3300,16
            .field  3500,16
            .field  3600,16