X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=main.c;h=8287fb5f845eb843815f020417e749dcf1465a74;hb=9c4f55f45a932dd6c79f99c5e5471d902c72ae9e;hp=511a599267265fc5397f3300ea38fe5697c67deb;hpb=932302efbdad63177565090060be9070aa6faf07;p=megadrive.git

diff --git a/main.c b/main.c
index 511a599..8287fb5 100644
--- a/main.c
+++ b/main.c
@@ -5,6 +5,9 @@
 #include "teensy3/usb_seremu.h"
 #include "teensy3/usb_rawhid.h"
 
+/* ?0SA 00DU, ?1CB RLDU */
+static uint8_t fixed_state[4] = { 0x33, 0x3f };
+
 ssize_t _write(int fd, const void *buf, size_t nbyte)
 {
 	char tbuf[64];
@@ -23,25 +26,65 @@ void yield(void)
 {
 }
 
+static void pin0_irq(void)
+{
+}
+
+void portb_isr(void)
+{
+	uint32_t isfr;
+
+	//printf("irq, GPIOB_PDIR: %08x\n", GPIOB_PDIR);
+
+	GPIOD_PDOR = fixed_state[(GPIOB_PDIR >> CORE_PIN0_BIT) & 1];
+
+	isfr = PORTB_ISFR;
+	PORTB_ISFR = isfr;
+}
+
 int main(void)
 {
-	int ret;
+	//int ret;
 
 	delay(1000); // wait for usb..
 
 	printf("starting, rawhid: %d\n", usb_rawhid_available());
 
+	// md pin   th tr tl  r  l  d  u
+	// md bit*   6  5  4  3  2  1  0
+	// t bit   b16 d5 d4 d3 d2 d1 d0
+	// t pin     0 20  6  8  7 14  2
+	// * - note: tl/tr mixed in most docs
+	pinMode(0, INPUT);
+	attachInterrupt(0, pin0_irq, CHANGE);
+
+	pinMode( 2, OUTPUT);
+	pinMode(14, OUTPUT);
+	pinMode( 7, OUTPUT);
+	pinMode( 8, OUTPUT);
+	pinMode( 6, OUTPUT);
+	pinMode(20, OUTPUT);
+
+	// led
+	pinMode(13, OUTPUT);
+	// CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
+	// CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
+
+	// CORE_PIN0_PORTSET CORE_PIN0_BITMASK PORTB_PCR16
+	printf("GPIOC PDDR, PDIR: %08x %08x\n", GPIOC_PDIR, GPIOC_PDDR);
+	printf("GPIOD PDDR, PDIR: %08x %08x\n", GPIOD_PDIR, GPIOD_PDDR);
+	printf("PORTB_PCR16: %08x\n", PORTB_PCR16);
+
 	// ret = usb_rawhid_recv(buf, 2000);
 	// ret = usb_rawhid_send(buf, 2000);
 
-	pinMode(13, OUTPUT);
-	pinMode(14, OUTPUT);
 	while (1) {
+		delay(4000);
+		fixed_state[1] &= ~0x20;
 		CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
-		CORE_PIN14_PORTSET = CORE_PIN14_BITMASK;
-		delay(500*4);
+
+		delay(700);
+		fixed_state[1] |= 0x20;
 		CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
-		CORE_PIN14_PORTCLEAR = CORE_PIN14_BITMASK;
-		delay(500*4);
 	}
 }