--- /dev/null
+//! tilaunchpad clock and I/O definitions
+
+// serial io stuff moved to msp430_serial.c
+// serial is common for the different versions of msp430 so it makes sense
+
+#include "platform.h"
+#include <signal.h>
+#include <io.h>
+#include <iomacros.h>
+
+#define MSP430_CPU_SPEED 6000000UL
+#include <setjmp.h>
+#include "msp430_serial.h"
+extern jmp_buf warmstart;
+void coldstart();
+#define USE_NMI_RESET_IRQ
+
+static void delay_1us()
+{
+ // 6 Mhz, 6000000 cycles/sec, 6000 cycles/msec, 6 cycles/usec
+ // 6 cycles = 1 usec
+ // asummung loop wil be 3 cycles
+ //asm(" nop"); // 1 cycle
+ asm(" nop"); // 1 cycle
+ asm(" nop"); // 1 cycle
+ asm(" nop"); // 1 cycle
+}
+
+void delay_us(unsigned int us)
+{
+ while (us) {
+ delay_1us();
+ us--;
+ }
+}
+
+void delay_ms(unsigned int ms)
+{
+ while (ms) {
+ ms--;
+ delay_us(1000);
+ }
+}
+
+void delay_sec(unsigned int s)
+{
+ while (s) {
+ s--;
+ delay_ms(1000);
+ }
+}
+
+static char led_pin = 0; // since we are short on pins we might have LED on different pin
+static char led_last;
+// led_pin=0 is disabled
+// BIT2 and BIT3 is on port 5 SBWDIO SBWTCK
+// BIT6 and BIT7 os on port 3 BRDRX BRDTX
+void led_init(char pin)
+{
+ ddputs("led=");
+ if (pin & BIT2) {
+ ddputs("P5.2");
+ led_pin = BIT2;
+ P5DIR |= led_pin;
+ } else if (pin & BIT3) {
+ ddputs("P5.3");
+ led_pin = BIT3;
+ P5DIR |= BIT3;
+ } else if (pin & BIT6) {
+ ddputs("P3.6");
+ led_pin = BIT6;
+ P3SEL &= ~BIT6; // do not use as uart1
+ P3DIR |= BIT6;
+ } else if (pin & BIT7) {
+ ddputs("P3.7");
+ led_pin = BIT7;
+ P3SEL &= ~BIT7; // do not use as uart1
+ P3DIR |= BIT7;
+ } else {
+ led_pin = 0;
+ ddputs("disabled");
+ }
+}
+
+void led_on() // 0 will disable, but it is up to the application to setup new use
+{
+// dddputs("led_on=");
+// dddputb(led_pin);
+ if (led_pin & BIT2) {
+ P5OUT |= BIT2;
+ } else if (led_pin & BIT3) {
+ P5OUT |= BIT3;
+ } else if (led_pin & BIT6) {
+ P3OUT |= BIT6;
+ } else if (led_pin & BIT7) {
+ P3OUT |= BIT7;
+ }
+ led_last = 1;
+}
+
+void led_off()
+{
+ //dddputs("led_off=");
+ //dddputb(led_pin);
+ if (led_pin & BIT2) {
+ P5OUT &= ~BIT2;
+ } else if (led_pin & BIT3) {
+ P5OUT &= ~BIT3;
+ } else if (led_pin & BIT6) {
+ P3OUT &= ~BIT6;
+ } else if (led_pin & BIT7) {
+ P3OUT &= ~BIT7;
+ }
+ led_last = 0;
+}
+
+void led_toggle()
+{
+ if (led_last) {
+ led_off();
+ } else {
+ led_on();
+ }
+}
+
+void led_blink(int n) // long - n shorts
+{
+ int i;
+ return;
+ led_off();
+ delay_ms(200);
+ led_on();
+ delay_ms(500);
+ for (i = 0; i < n; i++) {
+ led_off();
+ delay_ms(100);
+ led_on();
+ delay_ms(150);
+ }
+ led_off();
+}
+
+void check_usb2serial()
+{
+ //ddputs("usb2serial ");
+ led_init(SBWTCK); // we will use TCK for LED
+ P5DIR &= ~SBWDIO; // input
+
+ led_on(); // we will use TCK for LED
+ if ((P5IN & SBWDIO) == 0) { // TCK != DIO
+ led_init(0); // no led
+ dputs("low no usb2serial");
+ return;
+ }
+ led_off(); // we will use TCK for LED
+ if (P5IN & SBWDIO) { // TCK != DIO
+ led_init(0); // no led
+ dputs("high no usb2serial");
+ return;
+ }
+ // TCK is jumpered to DIO, lets start working as USB-serial converter.
+ serflush(txfp0);
+ serflush(txfp1);
+ delay_ms(100);
+ dputs("Serial pass through\n");
+ serputs("Serial pass through\n", txfp0);
+ while (1) {
+ char c;
+ if (seravailable(rxfp0) > 0) {
+ c=sergetc(rxfp0);
+ serputc( c, txfp1);
+ }
+ if (seravailable(rxfp1) > 0) {
+ c=sergetc(rxfp1);
+ serputc( c, txfp0);
+ }
+ // FIXME we should sleep
+ }
+}
+
+char rts_change = 1; // we cannot return 0 in longjmp so we take 1
+
+interrupt(PORT1_VECTOR) POSRT1_ISR(void)
+{
+ if (P1IFG & RTS) {
+ if ((P1IN & DTR) == 0) {
+ rts_change++;
+ if (rts_change > 10) { // just there is no wrap-around
+ rts_change = 10;
+ }
+ } else {
+ rts_change = 1;
+ }
+ P1IFG &= ~RTS; // clear irq
+ }
+ if (P1IFG & DTR) {
+ int i;
+ P1IFG &= ~DTR; // clear irq
+
+ for (i=0; (P1IN & DTR) == 0;i++) { // wait for DTR high
+ if (i>10000) {
+ i=10000;
+ }
+ }
+ if (i>5000) { //avoid spikes
+ longjmp(warmstart, rts_change);
+ }
+ }
+}
+
+#ifdef USE_NMI_RESET_IRQ
+// A reset is warmstart, ie. do not reset TUSB3410
+// to use this wire a reset switch or connect TUSB3410 DTR to RST/NMI
+// for development it is conveenient ot implement a reset function
+interrupt(NMI_VECTOR) NMI_ISR(void)
+{
+ IFG1 &= ~NMIIFG;
+ led_toggle();
+ dputs("NMI(RESET)\n");
+ dflush();
+ longjmp(warmstart, rts_change);
+}
+#endif
+// TI lauchpad has 12 Mhz X-tal on XT2 which also is the base clock for the TUSB34010
+// For Launchpad and probably EZ430/FETUIF
+// EZ430/FETUIF may need BCSCTL2 = SELM1 | DIVM1 | SELS;
+void coldstart()
+{
+ _DINT();
+#ifdef USE_NMI_RESET_IRQ
+ WDTCTL = WDTPW + WDTHOLD + WDTNMI; // Stop WDT, deactivate RESET
+ //IE1 |= NMIIE; // msp430f1612.pdf page 13
+#else
+ WDTCTL = WDTPW + WDTHOLD; // Stop WDT
+#endif
+ //led_init(SBWTCK);
+ led_init(0);
+ led_off();
+// reset for TUSB3410
+ P4OUT &= ~BIT6; // reset TUSB3410
+ P4DIR |= BIT6;
+// 12 Mhz on XT2
+ BCSCTL1 &= ~0x80; // turn on XT2 oscillator
+ do { // delay for X-tal to settle
+ IFG1 &= ~OFIFG;
+ delay_us(100); // wait at least 50 usec
+ } while (IFG1 & OFIFG);
+ //BCSCTL2 = SELM_2 | DIVM_1 | SELS | DIVS_0; // 6Mhz MCLK=XT2/2 SMCLK=XT2
+ BCSCTL2 = SELM_2 | DIVM_2 | SELS | DIVS_0; // 3Mhz MCLK=XT2/4 SMCLK=XT2
+// Disable eeprom P3.1 SDA P3.3 SCL
+ P3OUT &= ~(BIT1 | BIT3); // pull dcl and sda down
+ P3DIR |= BIT1 | BIT3;
+// generate 12 Mhz clock for TUSB3410
+ P5SEL |= BIT5; // P5.5 is SMCLK to TUSG3410
+ P5DIR |= BIT5; // P5.5 is output
+// release reset for TUSB3410
+ delay_ms(100);
+ P4OUT &= ~BIT6; // release reset to TUSB3410
+ P4DIR &= ~BIT6; // and release port TUSB3410
+// P1.3 RTS input, P1.4 DTR input can generate IRQ
+ P1DIR &= ~(RTS | DTR); // input
+ P1SEL &= ~(RTS | DTR); // no special funtions
+ P1IES &= ~RTS; // low to high
+ P1IES |= DTR; // high to low
+ P1IFG &= ~(RTS | DTR); // clear irqs if any, to avoid instant irq
+ P1IE |= RTS | DTR; // enable IRQ on pin 3,4
+ IE1 |= NMIIE; // msp430f1612.pdf page 13
+ ser0_init(0, &fiforx0, &fifotx0);
+ //ser1_init(0, &fiforx1, &fifotx1);
+ ser1_init(0, NULL, NULL);
+ _EINT(); // now we can print
+ dputs("->coldstart<-\n");
+ led_blink(4);
+ led_on(); // led comes on after the very basic setup is done
+}
+
+void msp430_init()
+{
+#ifdef USE_NMI_RESET_IRQ
+ WDTCTL = WDTPW + WDTHOLD + WDTNMI; // Stop WDT, deactivate RESET
+ //IFG1 &= ~NMIIFG;
+ IE1 |= NMIIE; // msp430f1612.pdf page 13
+#else
+ WDTCTL = WDTPW + WDTHOLD; // Stop WDT
+#endif
+ serclear(rxfp0);
+ ddputs("msp430_init\n");
+ led_blink(10);
+
+ check_usb2serial(); // configure as USB-serial if jumper RST-TEST
+ led_blink(2);
+ led_on();
+}
+
+//! Initialization is correct.
+void msp430_init_dco_done()
+{
+}
projects / goodfet / blobdiff