+/*
+ * TeensyTAS, TAS input player for MegaDrive
+ * Copyright (c) 2014 notaz
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
#include <stdint.h>
#include <stdio.h>
#include <string.h>
uint8_t fixed_state[4];
uint32_t fixed_state32;
};
+ union {
+ uint8_t pending_state[4];
+ uint32_t pending_state32;
+ };
uint32_t stream_enable_to:1;
uint32_t stream_enable_from:1;
uint32_t stream_started:1;
uint32_t stream_ended:1;
uint32_t use_readinc:1;
+ uint32_t use_pending:1;
uint32_t frame_cnt;
uint32_t edge_cnt;
uint32_t t_i;
{
}
+/* portb handles TH */
static void portb_isr_fixed(void)
{
uint32_t isfr, th;
// should hopefully give atomic fixed_state read..
s = g.fixed_state32;
+ g.fixed_state32 = g.pending_state32;
g.stream_from[g.f_i][0] = s;
g.stream_from[g.f_i][1] = s >> 8;
g.f_i = (g.f_i + 1) & STREAM_BUF_MASK;
}
}
else if (g.stream_enable_from) {
+ g.use_pending = 1;
if (g.use_readinc) {
attachInterruptVector(IRQ_PORTB,
portb_isr_fixed_do_from);
attachInterruptVector(IRQ_PORTC,
portc_isr_frameinc_do_from);
}
-
- // prep first frame already
- do_from_step();
}
__enable_irq();
}
{
g.stream_enable_to = 0;
g.stream_enable_from = 0;
- g.use_readinc = 0;
g.stream_started = 0;
g.stream_ended = 0;
+ g.use_readinc = 0;
+ g.use_pending = 0;
g.t_i = g.t_o = 0;
g.f_i = g.f_o = 0;
g.frame_cnt = 0;
switch (pkt->type) {
case PKT_FIXED_STATE:
- memcpy(g.fixed_state, pkt->data, sizeof(g.fixed_state));
+ memcpy(&i, pkt->data, sizeof(i));
+ if (g.use_pending)
+ g.pending_state32 = i;
+ else
+ g.fixed_state32 = i;
break;
case PKT_STREAM_ENABLE:
__disable_irq();
int main(void)
{
+ uint32_t led_time = 0;
+ uint32_t scheck_time = 0;
uint32_t edge_cnt_last;
uint32_t edge_cnt;
uint8_t buf[64];
- int timeout;
int ret;
delay(1000); // wait for usb..
asm("mrs %0, BASEPRI" : "=r"(ret));
printf("BASEPRI: %d\n", ret);
- timeout = 1000;
edge_cnt_last = g.edge_cnt;
while (1) {
struct tas_pkt pkt;
+ uint32_t now;
while (g.stream_enable_to && !g.stream_ended
&& get_space_to() > sizeof(pkt.data) / STREAM_EL_SZ)
{
+ if (g.t_i == g.t_o && g.frame_cnt != 0) {
+ printf("underflow detected\n");
+ g.stream_enable_to = 0;
+ break;
+ }
+
pkt.type = PKT_STREAM_REQ;
pkt.req.frame = g.frame_cnt;
}
}
- if (timeout == 1000) {
+ now = millis();
+
+ // start condition check
+ if (now - scheck_time > 1000) {
edge_cnt = g.edge_cnt;
//printf("e: %d th: %d\n", edge_cnt - edge_cnt_last,
// (GPIOB_PDIR >> CORE_PIN0_BIT) & 1);
- if (edge_cnt - edge_cnt_last > 10000) {
+ if ((g.stream_enable_to || g.stream_enable_from)
+ && !g.stream_started
+ && edge_cnt - edge_cnt_last > 10000)
+ {
do_start_seq();
edge_cnt = g.edge_cnt;
}
edge_cnt_last = edge_cnt;
+ scheck_time = now;
}
- ret = usb_rawhid_recv(buf, timeout);
- if (ret == 64) {
- CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
-
- do_usb(buf);
- timeout = 20;
- }
- else if (ret == 0) {
- CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
- timeout = 1000;
+ // led?
+ if (CORE_PIN13_PORTREG & CORE_PIN13_BITMASK) {
+ if ((int)(now - led_time) > 10)
+ CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
}
- else {
- printf("usb_rawhid_recv: %d\n", ret);
- timeout = 1000;
+
+ // something on rawhid?
+ if (usb_rawhid_available() > 0)
+ {
+ ret = usb_rawhid_recv(buf, 20);
+ if (ret == 64) {
+ led_time = millis();
+ CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
+
+ do_usb(buf);
+ }
+ else {
+ printf("usb_rawhid_recv: %d\n", ret);
+ }
}
}
notaz.gp2x.de / megadrive.git / blobdiff