diff options
Diffstat (limited to 'msp430')
| -rw-r--r-- | msp430/README.md | 20 | ||||
| -rw-r--r-- | msp430/alee-msp430.cpp | 6 |
2 files changed, 23 insertions, 3 deletions
diff --git a/msp430/README.md b/msp430/README.md new file mode 100644 index 0000000..34d2ddb --- /dev/null +++ b/msp430/README.md @@ -0,0 +1,20 @@ +# msp430 implementation + +This is the MSP430 port of Alee Forth. It produces a binary that enters a REPL made available on the UART peripheral at 115200 baud. The specific target is MSP430G2553. + +## Building + +1. `make clean` (just in case) +2. `make msp430-prep`: Builds `alee` for the host computer and uses it to create an `alee.dat` blob containing bytecode for `forth/core.fth` and `forth/msp430.fth`. +3. `make msp430`: Produces `alee-msp430`, a standalone binary for the MSP430 with built-in core and msp430 word-sets. + +The final binary is < 11 kB and provides 150 bytes for user dictionary in RAM (assuming 512 bytes of total RAM). + +## msp430.fth + +The msp430 word-set makes programming for the MSP430 easier: + +* All register names are defined (P1OUT, ADC10MEM, etc.). +* `r!` and `r@` to write and read device memory (i.e. registers). +* `rset`, `rclr`, `rtgl` work like `r!` but set, clear, or toggle the given value/mask instead. + diff --git a/msp430/alee-msp430.cpp b/msp430/alee-msp430.cpp index 3d660a7..6328419 100644 --- a/msp430/alee-msp430.cpp +++ b/msp430/alee-msp430.cpp @@ -36,15 +36,15 @@ int main() { WDTCTL = WDTPW | WDTHOLD; DCOCTL = 0; - BCSCTL1 = CALBC1_1MHZ; - DCOCTL = CALDCO_1MHZ; + BCSCTL1 = CALBC1_16MHZ; + DCOCTL = CALDCO_16MHZ; P1SEL |= BIT1 | BIT2; P1SEL2 |= BIT1 | BIT2; UCA0CTL1 = UCSWRST; UCA0CTL1 |= UCSSEL_2; - UCA0BR0 = 104; + UCA0BR0 = 139; UCA0BR1 = 0; UCA0MCTL = UCBRS0; UCA0CTL1 &= (uint8_t)~UCSWRST; |