; -*- coding: utf-8 -*- ; LP_MSP430FR2476.asm ; =================================================================================== ; in case of 3.3V powered by UARTtoUSB bridge, open J13 straps {RST,TST,V+,5V} BEFORE ; =================================================================================== ; J101 Target J101 eZ-FET UARTtoUSB ; ; DVSS 14 o--o 13 GND ; 5V0 12 o--o 11 5V0 ; DVCC 10 o--o 9 3V3 ; P1.5 UCA0_RX 8 o--o 7 <------------ TX UARTtoUSB ; P1.4 UCA0_TX 6 o--o 5 <---------+-> RX UARTtoUSB ; SBWTDIO/RST 4 o--o 3 | _ ; SBWTCK/TST 2 o--o 1 +--4k7---o o-- GND ; DeepRST ; SD_Card socket ; VCC - ----> VCC SD_CardAdapter ; GND - <---> GND SD_CardAdapter ; P2.4 - UCA1 CLK J2 ----> CLK SD_CardAdapter (SCK) ; P2.6 - UCA1 TXD/SIMO J1 ----> SDI SD_CardAdapter (MOSI) ; P2.5 - UCA1 RXD/SOMI J1 <---- SDO SD_CardAdapter (MISO) ; P1.6 - J4 ----> CS SD_CardAdapter (Card Select) ; P1.7 - J4 <---- CD SD_CardAdapter (Card Detect) ; ; ====================================================================== ; LP_MSP430FR2476 board ; ====================================================================== ; J1 - left ext. ; 3v3 ; P1.6/UCA0CLK/TA1CLK/TDI/TCLK/A6 ; P2.5/UCA1RXD/UCA1SOMI/CAP1.2 ; P2.6/UCA1TXD/UCA1SIMO/CAP1.3 ; P2.2/SYNC/ACLK/COMP0.1 ; P5.4/UCB1STE/TA3CLK/A11 ; P3.5/UCB1CLK/TB0TRG/CAP3.1 ; P4.5/UCB0SOMI/UCB0SCL/TA3.2 ; P1.3/UCB0SOMI/UCB0SCL/MCLK/A3 ; P1.2/UCB0SIMO/UCB0SDA/TA0.2/A2/VEREF- ; ; ; J3 - left int. ; 5V ; GND ; P1.7/UCA0STE/SMCLK/TDO/A7 ; P4.3/UCB1SOMI/UCB1SCL/TB0.5/A8 ; P4.4/UCB1SIMO/UCB1SDA/TB0.6/A9 ; P5.3/UCB1CLK/TA3.0/A10 ; P1.0/UCB0STE/TA0CLK/A0/VEREF+ -- LED1 ; P1.1/UCB0CLK/TA0.1/COMP0.0/A1 --- TEMPERATURE SENSOR ------ 3V3 ; P5.7/TA2.1/COMP0.2 ; P3.7/TA3.2/CAP2.0 ; ; J4 - right int. ; P5.2/UCA0TXD/UCA0SIMO/TB0.4 ; P5.1/UCA0RXD/UCA0SOMI/TB0.3 -- LED2Red ; P5.0/UCA0CLK/TB0.2 -- LED2Green ; P4.7/UCA0STE/TB0.1 -- LED2Blue ; P6.0/TA2.2/COMP0.3 ; P3.3/TA2.1/CAP0.1 ; P6.1/TB0CLK ; P6.2/TB0.0 ; P4.1/TA3.0/CAP2.2 ; P3.1/UCA1STE/CAP1.0 ; ; J2 - right ext. ; GND ; P4.6/UCB0SIMO/UCB0SDA/TA3.1 ; P2.1/XIN ; P2.0/XOUT ; /RST/SBWTDIO ; P3.2/UCB1SIMO/UCB1SDA/CAP3.2 ; P3.6/UCB1SOMI/UCB1SCL/CAP3.3 ; P4.2/TA3CLK/CAP2.3 ; P2.7/UCB1STE/CAP3.0 ; P2.4/UCA1CLK/CAP1.1 ; ; switch-keys: ; P4.0/TA3.1/CAP2.1 - S1 ; P2.3/TA2.0/CAP0.2 - S2 ; /RST - S3 ; ; XTAL LF 32768 Hz ; P2.0/XOUT ; P2.1/XIN ; ; ; Clocks: ; 8 MHz DCO intern ; ; ; ---------------------------------------------------------------------- ; POWER ON RESET AND INITIALIZATION : I/O ; ---------------------------------------------------------------------- ; ---------------------------------------------------------------------- ; POWER ON RESET AND INITIALIZATION : PORT1/2 ; ---------------------------------------------------------------------- ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ? ; PORT1 usage ; P1.0 - green LED2 LED2_OUT .equ P1OUT LED2_DIR .equ P1DIR LED2 .equ 1 ; PORTx default wanted state : pins as input with pullup resistor BIS #-1,&PAREN ; all pins with pull up/down resistors MOV #0FFFEh,&PAOUT ; all pins with pull up resistors else P1.0 (LED2) .IFDEF UCA0_TERM ; P1.4 UCA0-TXD --> USB2UART RXD ; P1.5 UCA0-RXD <-- USB2UART TXD TERM_IN .equ P1IN TERM_SEL .equ P1SEL0 TERM_REN .equ P1REN TXD .equ 10h ; P1.4 = TX RXD .equ 20h ; P1.5 = RX BUS_TERM .equ 30h .ENDIF CD_SD .equ 080h ; P1.7 as Card Detect SD_CDIN .equ P1IN CS_SD .equ 040h ; P1.6 as Card Select SD_CSOUT .equ P1OUT SD_CSDIR .equ P1DIR .IFDEF UCA1_SD BUS_SD .equ 7000h ; pins P2.4 as UCA1CLK, P2.6 as UCA1SIMO & P2.5 as UCA1SOMI SD_SEL .equ PASEL0 ; to configure UCA1 SD_REN .equ PAREN ; to configure pullup resistors .ENDIF ; P2.3/TA2.0/CAP0.2 - S2 SW2_IN .equ P2IN SW2 .equ 8 ; ---------------------------------------------------------------------- ; POWER ON RESET AND INITIALIZATION : PORT3/4 ; ---------------------------------------------------------------------- ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ? BIS #-1,&PBREN ; all pins 1 with pull up/down resistors MOV #07FFFh,&PBOUT ; all pins with pull up resistors else P4.7 (LED2B) ; PORT3 usage .IFDEF UCB1_TERM ; TERM_SEL .equ P3SEL0 TERM_REN .equ P3REN TERM_OUT .equ P3OUT BUS_TERM .equ 0Ch ; P3.2=SDA P3.3=SCL .ENDIF ; PORT4 usage ; S1 - P4.0 SW1_IN .equ P4IN SW1 .equ 1 ; P4.0 = S1 ; LED2B - J8 - P4.7 ; ---------------------------------------------------------------------- ; POWER ON RESET AND INITIALIZATION : PORT5/6 ; ---------------------------------------------------------------------- ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ? ; PORT5 usage ; LED2R - J8 - P5.1 red LED1 ; LED2G - J8 - P5.0 LED1_OUT .equ P5OUT LED1_DIR .equ P5DIR LED1 .equ 2 ; PORT6 usage HANDSHAKOUT .equ P6OUT HANDSHAKIN .equ P6IN RTS .equ 2 ; P6.1 CTS .equ 4 ; P6.2 ; BIS #00003h,&PCDIR ; all pins 0 as input else P5.0 (LED2G) P5.1 (LED2R) ; MOV #0FFFCh,&PCOUT ; all pins high else P5.0 (LED2G) P5.1 (LED2R) ; BIS #0FFFCh,&PCREN ; all pins with pull resistors else P5.0 (LED2G) P5.1 (LED2R) BIS #-1,&PCREN ; all pins with pull up/down resistors MOV #0FFFCh,&PCOUT ; all pins with pull up resistors else P5.0 (LED2G) P5.1 (LED2R) .IFDEF TERMINAL4WIRES ; RTS output is wired to the CTS input of UART2USB bridge ; configure RTS as output high to disable RX TERM during start FORTH BIS.B #RTS,&P6DIR ; RTS as output high .IFDEF TERMINAL5WIRES ; CTS input must be wired to the RTS output of UART2USB bridge ; configure CTS as input low (true) to avoid lock when CTS is not wired BIC.B #CTS,&P6OUT ; CTS input pulled down .ENDIF ; TERMINAL5WIRES .ENDIF ; TERMINAL4WIRES ; ---------------------------------------------------------------------- ; FRAM config ; ---------------------------------------------------------------------- .IF FREQUENCY > 8 MOV.B #0A5h,&FRCTL0_H ; enable FRCTL0 access MOV.B #10h,&FRCTL0 ; 1 waitstate @ 16 MHz MOV.B #01h,&FRCTL0_H ; disable FRCTL0 access .ENDIF ; ---------------------------------------------------------------------- ; POWER ON RESET SYS config ; ---------------------------------------------------------------------- ; SYS code ; BIC #1,&SYSCFG0 ; enable write program in FRAM MOV #0A500h,&SYSCFG0 ; enable write MAIN and INFO ; ---------------------------------------------------------------------- ; POWER ON RESET AND INITIALIZATION : CLOCK SYSTEM ; ---------------------------------------------------------------------- ; CS code for MSP430FR2476 ; to measure REFO frequency, output ACLK on P2.2: ; BIS.B #4,&P2SEL1 ; BIS.B #4,&P2DIR ; result : REFO = xx.xx kHz .IFDEF LF_XTAL ; MOV #0000h,&CSCTL3 ; FLL select XT1, FLLREFDIV=0 (default value) MOV #0000h,&CSCTL4 ; ACLOCK select XT1, MCLK & SMCLK select DCOCLKDIV BIS.B #03,&P2SEL0 ; P2.0 as XOUT, P2.1 as XIN .ELSE BIS #0010h,&CSCTL3 ; FLL select REFCLOCK ; MOV #0100h,&CSCTL4 ; ACLOCK select REFO, MCLK & SMCLK select DCOCLKDIV (default value) .ENDIF BIC.B #-1,&CSCTL1 ; clear DCORSEL (Set 1MHZ DCORSEL), DCOFTRIM=0, ENable MODulation to reduce EMI .IF FREQUENCY = 1 ; nothing else to do .ELSEIF FREQUENCY = 2 BIS.B #2,&CSCTL1 ; Set 2MHZ DCORSEL .ELSEIF FREQUENCY = 4 BIS.B #4,&CSCTL1 ; Set 4MHZ DCORSEL .ELSEIF FREQUENCY = 8 BIS.B #6,&CSCTL1 ; Set 8MHZ DCORSEL .ELSEIF FREQUENCY = 12 BIS.B #8,&CSCTL1 ; Set 12MHZ DCORSEL .ELSEIF FREQUENCY = 16 BIS.B #10,&CSCTL1 ; Set 16MHZ DCORSEL .ELSEIF FREQUENCY = 20 BIS.B #12,&CSCTL1 ; Set 20MHZ DCORSEL .ELSEIF FREQUENCY = 24 BIS.B #14,&CSCTL1 ; Set 24MHZ DCORSEL .ELSEIF .error "bad frequency setting, only 1,2,4,8,12,16,20,24 MHz" .ENDIF ; MOV #INT(FREQUENCY*1000000/32768)-1,&CSCTL2; set FLLD=0 (DCOCLKCDIV=DCO),set FLLN for frequency slight lower MOV #INT(FREQUENCY*1000000/32768),&CSCTL2; set FLLD=0 (DCOCLKCDIV=DCO),set FLLN for frequency slight upper MOV #92,X ; 96* 3 ms = 288 ms delay, because FLL lock time = 200 ms ClockWaitX MOV &FREQ_KHZ,Y ; ClockWaitY SUB #1,Y ;1 JNZ ClockWaitY ;2 FREQ_KHZ x 3 ==> 3ms SUB #1,X ; JNZ ClockWaitX ;