Add basic system: LED GPIO on MSP430FR5969 Launchpad and faked GPIO on POSIX

1 files changed, 150 insertions, 0 deletions

diff --git a/src/arch/msp430fr5969lp/arch.cc b/src/arch/msp430fr5969lp/arch.cc
new file mode 100644
index 0000000..19416e1
--- /dev/null
+++ b/src/arch/msp430fr5969lp/arch.cc
@@ -0,0 +1,150 @@
+#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;
+	CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;
+	CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;
+	CSCTL0_H = 0;
+
+	// enable LXFT for RTC
+	CSCTL0_H = CSKEY >> 8;
+	CSCTL4 &= ~LFXTOFF;
+	while (SFRIFG1 & OFIFG) {
+		CSCTL5 &= ~LFXTOFFG;
+		SFRIFG1 &= ~OFIFG;
+	}
+	CSCTL0_H = 0;
+
+	__delay_cycles(1000000);
+	//P1OUT = 0;
+	//P4OUT = 0;
+}
+
+void Arch::idle_loop(void)
+{
+	while (1);
+}
+
+Arch arch;
+
+/*
+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);
+			}
+		}
+	}
+}
+*/