From 67d25d837ac55f28a366c0a3b262e439a6e75fc3 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Sat, 19 Aug 2017 12:15:28 +0200 Subject: Add AmForth --- .../msp430/devices/msp430g2553/words/cold.asm | 41 ++++++++++++++++++++++ .../devices/msp430g2553/words/env-mcu-info.asm | 10 ++++++ .../devices/msp430g2553/words/usart-init.asm | 13 +++++++ 3 files changed, 64 insertions(+) create mode 100644 amforth-6.5/msp430/devices/msp430g2553/words/cold.asm create mode 100644 amforth-6.5/msp430/devices/msp430g2553/words/env-mcu-info.asm create mode 100644 amforth-6.5/msp430/devices/msp430g2553/words/usart-init.asm (limited to 'amforth-6.5/msp430/devices/msp430g2553/words') diff --git a/amforth-6.5/msp430/devices/msp430g2553/words/cold.asm b/amforth-6.5/msp430/devices/msp430g2553/words/cold.asm new file mode 100644 index 0000000..0828eb4 --- /dev/null +++ b/amforth-6.5/msp430/devices/msp430g2553/words/cold.asm @@ -0,0 +1,41 @@ +CODEHEADER(XT_COLD,4,"cold") +main: ; Debugger requires the 'main' symbol. +reset: + ; Watchdog Timer + MOV #(WDTPW+WDTHOLD),&WDTCTL ; stop watchdog timer + + ; Basic Clock Module + ; My thanks to the 4e4th team for the following two lines! + MOV.B &CALBC1_8MHZ, &BCSCTL1 ; Set DCO + MOV.B &CALDCO_8MHZ, &DCOCTL ; to 8 MHz. + + MOV.B #00h,&BCSCTL2 ; MCLK=DCO/1, SMCLK=DCO/1 + + ; Flash Memory Controller + ; Flash Timing Generator frequency must be 257-476 kHz. + ; 8 MHZ/17 = 470.59 kHz. tFTG=2.125 msec. + ; At 470 kHz, byte/word program time is 35*tFTG = 75 usec. + ; Cumulative program time to any 64-byte block (between erasures) + ; must not exceed 4 msec, thus 53 writes at 250 kHz. Therefore, + ; do not use exclusively byte writes in a 64-byte block. + ; Also, "a flash word (low + high byte) must not + ; be written more than twice between erasures." + ; Program/Erase endurance is 10,000 cycles minimum. + MOV #FWKEY+0,&FCTL1 ; write & erase modes OFF + MOV #FWKEY+FSSEL1+16,&FCTL2 ; SMCLK/17 = 471 kHz. + MOV #FWKEY+LOCK,&FCTL3 ; lock flash memory against writing + + ; Interrupt Enables + MOV.B #0,&IE1 ; no interrupts enabled + MOV.B #0,&IE2 ; no interrupts enabled + + ; Forth registers + MOV #RSTACK,SP ; set up stack + MOV #PSTACK,PSP + MOV #UAREA,UP ; initial user pointer + + CLR R15 + + ; now hand over to Forth with WARM (a colon word) + MOV #XT_WARM+2,IP + NEXT diff --git a/amforth-6.5/msp430/devices/msp430g2553/words/env-mcu-info.asm b/amforth-6.5/msp430/devices/msp430g2553/words/env-mcu-info.asm new file mode 100644 index 0000000..621fc72 --- /dev/null +++ b/amforth-6.5/msp430/devices/msp430g2553/words/env-mcu-info.asm @@ -0,0 +1,10 @@ +ENVIRONMENT(XT_ENV_MCU_INFO,8,"mcu-info") + .DW XT_DOLITERAL + .dw mcuinfo + .DW XT_EXIT +mcuinfo: + ; first fixed sized elements + .dw RAMEND-RAMSTART ; RAM Size + .dw 0 ; EEPROM Size + .dw AMFORTH_START-1 ; max-dp + .dw 1 ; number of interrupts diff --git a/amforth-6.5/msp430/devices/msp430g2553/words/usart-init.asm b/amforth-6.5/msp430/devices/msp430g2553/words/usart-init.asm new file mode 100644 index 0000000..e8c7693 --- /dev/null +++ b/amforth-6.5/msp430/devices/msp430g2553/words/usart-init.asm @@ -0,0 +1,13 @@ + CODEHEADER(XT_USART,6,"+usart") + ; USCI_A0 + MOV.B #06,&P1SEL ; P1.1,2 are UART + MOV.B #06,&P1SEL2 ; P1.1,2 are UART + + BIS.B #UCSWRST,&UCA0CTL1 ; SWRST while configuring! + MOV.B #00h,&UCA0CTL0 ; UART, 8N1, LSB first + MOV.B #81h,&UCA0CTL1 ; BRCLK = SMCLK, SWRST set + MOV.B #41h,&UCA0BR0 ; 9600 Baud at 8 MHz + MOV.B #03h,&UCA0BR1 + MOV.B #04h,&UCA0MCTL ; UCBRFx=0, UCBRSx=2 for 9600 baud + BIC.B #UCSWRST,&UCA0CTL1 ; done configuring + NEXT -- cgit v1.2.3