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#include "arch.h"
#include <msp430.h>
void Arch::setup(void)
{
WDTCTL = WDTPW | WDTHOLD;
PJSEL0 = BIT4 | BIT5;
PM5CTL0 &= ~LOCKLPM5;
FRCTL0 = FWPW;
FRCTL0_L = 0x10;
FRCTL0_H = 0xff;
// 16MHz DCO
CSCTL0_H = CSKEY >> 8;
CSCTL1 = DCORSEL | DCOFSEL_4;
#ifdef WITH_LOOP
CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
#else
CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;
#endif
CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;
CSCTL0_H = 0;
#ifdef WITH_LOOP
// enable LXFT for RTC
CSCTL0_H = CSKEY >> 8;
CSCTL4 &= ~LFXTOFF;
while (SFRIFG1 & OFIFG) {
CSCTL5 &= ~LFXTOFFG;
SFRIFG1 &= ~OFIFG;
}
CSCTL0_H = 0;
__delay_cycles(1000000);
#endif
#ifdef TIMER_US
// 16MHz/16 -> ~1MHz timer
TA0CTL = TASSEL__SMCLK | ID__8 | MC__CONTINUOUS;
TA0EX0 = 1;
TA0CTL |= TACLR;
#endif
#if defined(WITH_LOOP) || defined(TIMER_S)
// 1s per wakeup for loop
TA1CTL = TASSEL__ACLK | ID__8 | MC__UP;
TA1EX0 = 0;
TA1CCR0 = 4096;
TA1CTL |= TACLR | TAIE;
#endif
#ifdef TIMER_CYCLES
TA2CTL = TASSEL__SMCLK | ID__1 | MC__CONTINUOUS;
TA2EX0 = 0;
TA2CTL |= TACLR;
#endif
//P1OUT = 0;
//P4OUT = 0;
}
#ifdef WITH_WAKEUP
extern void wakeup();
#endif
void Arch::idle_loop(void)
{
while (1) {
__eint();
__bis_SR_register(LPM0_bits);
#ifdef WITH_WAKEUP
wakeup();
#endif
}
}
Arch arch;
#if defined(WITH_LOOP) || defined(TIMER_S)
#include "driver/uptime.h"
extern void loop();
__attribute__((interrupt(TIMER1_A1_VECTOR))) __attribute__((wakeup)) void handle_timer0_overflow()
{
if (TA1IV == 0x0e) {
#ifdef WITH_LOOP
loop();
#endif
#ifdef TIMER_S
uptime.tick_s();
#endif
}
}
#endif
/*
void uart_setup(void)
{
UCA0CTLW0 = UCSWRST | UCSSEL__SMCLK;
UCA0MCTLW = UCOS16 | (2<<5) | 0xD600;
UCA0BR0 = 104;
UCA0IRCTL = 0;
UCA0ABCTL = 0;
P2SEL0 &= ~(BIT0 | BIT1);
P2SEL1 |= BIT0 | BIT1;
P2DIR |= BIT0;
UCA0CTLW0 &= ~UCSWRST;
UCA0IE |= UCRXIE;
}
void uart_putchar(char c)
{
while (!(UCA0IFG & UCTXIFG));
UCA0TXBUF = c;
if (c == '\n')
uart_putchar('\r');
}
__attribute__((interrupt(USCI_A0_VECTOR))) void USCI_A0_ISR(void)
{
static char prompt[64];
static unsigned int prompt_pos = 0;
char buf;
unsigned char raw_p_pos, parse_p_pos;
char parsed_prompt[64];
unsigned char argc = 0;
char *argv[32];
if (UCA0IFG & UCRXIFG) {
buf = UCA0RXBUF;
if (buf == '\r') {
uart_putchar('\n');
if (prompt_pos > 0) {
parse_p_pos = 0;
argv[0] = parsed_prompt;
for (raw_p_pos = 0; raw_p_pos < prompt_pos; raw_p_pos++) {
if (prompt[raw_p_pos] != ' ') {
parsed_prompt[parse_p_pos++] = prompt[raw_p_pos];
} else if ((raw_p_pos > 0) && (prompt[raw_p_pos-1] != ' ')) {
argc++;
parsed_prompt[parse_p_pos++] = 0;
argv[argc] = parsed_prompt + parse_p_pos;
}
}
if (parse_p_pos < 64)
parsed_prompt[parse_p_pos] = 0;
else
parsed_prompt[63] = 0;
check_command(argc, argv);
prompt_pos = 0;
*prompt = 0;
}
uart_puts(COL_YELLOW "msp430fr5969" COL_GREEN " > " COL_RESET);
} else if (buf == '\f') {
uart_puts("\n" COL_YELLOW "msp430fr5969" COL_GREEN " > " COL_RESET);
uart_nputs(prompt, prompt_pos);
} else if (buf == 0x7f) {
if (prompt_pos) {
prompt_pos--;
uart_puts("\e[D \e[D");
}
} else if (buf == 0x15) { // ^U
for ( ; prompt_pos > 0; prompt_pos-- )
uart_puts("\e[D \e[D");
*prompt = 0;
} else if (buf == 0x17) { // ^W
for ( ; (prompt_pos > 0) && (prompt[prompt_pos] != ' '); prompt_pos-- )
uart_puts("\e[D \e[D");
for ( ; (prompt_pos > 0) && (prompt[prompt_pos-1] == ' '); prompt_pos-- )
uart_puts("\e[D \e[D");
prompt[prompt_pos] = 0;
} else if (buf >= ' ') {
if (prompt_pos < sizeof(prompt)-1) {
prompt[prompt_pos++] = buf;
uart_putchar(buf);
}
}
}
}
*/
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