#include "teensy3/usb_rawhid.h"
#include "pkts.h"
+#define noinline __attribute__((noinline))
+
// use power of 2
#define STREAM_BUF_SIZE 512
#define STREAM_BUF_MASK (512 - 1)
/* ?0SA 00DU, ?1CB RLDU */
+#define STREAM_EL_SZ 2
+
static struct {
- uint8_t stream[STREAM_BUF_SIZE][2];
- uint8_t fixed_state[4];
- uint32_t stream_enable:1;
+ uint8_t stream_to[STREAM_BUF_SIZE][STREAM_EL_SZ];
+ uint8_t stream_from[STREAM_BUF_SIZE][STREAM_EL_SZ];
+ union {
+ uint8_t fixed_state[4];
+ uint32_t fixed_state32;
+ };
+ uint32_t stream_enable_to:1;
+ uint32_t stream_enable_from:1;
uint32_t stream_started:1;
- uint32_t stream_received:1;
+ uint32_t stream_ended:1;
uint32_t use_readinc:1;
uint32_t frame_cnt;
uint32_t edge_cnt;
- uint32_t i;
- uint32_t o;
+ uint32_t t_i;
+ uint32_t t_o;
+ uint32_t f_i;
+ uint32_t f_o;
} g;
-#define STREAM_EL_SZ sizeof(g.stream[0])
-
ssize_t _write(int fd, const void *buf, size_t nbyte)
{
char tbuf[64];
g.edge_cnt++;
}
-static void portb_isr_readinc(void)
+static void portb_isr_do_to_inc(void)
{
uint32_t isfr, th;
PORTB_ISFR = isfr;
th = (GPIOB_PDIR >> CORE_PIN0_BIT) & 1;
- GPIOD_PDOR = g.stream[g.o][th];
+ GPIOD_PDOR = g.stream_to[g.t_o][th];
if (th) {
- g.o = (g.o + 1) & STREAM_BUF_MASK;
- if (g.o == g.i)
+ g.t_o = (g.t_o + 1) & STREAM_BUF_MASK;
+ if (g.t_o == g.t_i)
// done
attachInterruptVector(IRQ_PORTB, portb_isr_fixed);
g.frame_cnt++;
g.edge_cnt++;
}
-static void portb_isr_read(void)
+static void portb_isr_do_to(void)
{
uint32_t isfr, th;
PORTB_ISFR = isfr;
th = (GPIOB_PDIR >> CORE_PIN0_BIT) & 1;
- GPIOD_PDOR = g.stream[g.o][th];
+ GPIOD_PDOR = g.stream_to[g.t_o][th];
g.edge_cnt++;
}
isfr = PORTC_ISFR;
PORTC_ISFR = isfr;
- g.o = (g.o + 1) & STREAM_BUF_MASK;
- if (g.o == g.i) {
+ g.t_o = (g.t_o + 1) & STREAM_BUF_MASK;
+ if (g.t_o == g.t_i) {
attachInterruptVector(IRQ_PORTB, portb_isr_fixed);
attachInterruptVector(IRQ_PORTC, portc_isr_nop);
}
g.frame_cnt++;
}
+/* "recording" data */
+static noinline void do_from_step(void)
+{
+ uint32_t s;
+
+ // should hopefully give atomic fixed_state read..
+ s = g.fixed_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;
+}
+
+static void portb_isr_fixed_do_from(void)
+{
+ uint32_t isfr, th;
+
+ isfr = PORTB_ISFR;
+ PORTB_ISFR = isfr;
+ th = (GPIOB_PDIR >> CORE_PIN0_BIT) & 1;
+
+ GPIOD_PDOR = g.fixed_state[th];
+ if (th)
+ do_from_step();
+ g.edge_cnt++;
+}
+
+static void portc_isr_frameinc_do_from(void)
+{
+ uint32_t isfr;
+
+ isfr = PORTC_ISFR;
+ PORTC_ISFR = isfr;
+
+ do_from_step();
+ g.frame_cnt++;
+}
+
static void udelay(uint32_t us)
{
uint32_t start = micros();
return;
}
- if (!g.stream_enable) {
+ if (!g.stream_enable_to && !g.stream_enable_from) {
printf("got start_seq, without enable from USB\n");
return;
}
- if (g.i == g.o) {
- printf("got start_seq while buffer is empty\n");
+ if (g.stream_enable_to && g.t_i == g.t_o) {
+ printf("got start_seq while stream_to is empty\n");
+ return;
+ }
+
+ if (g.stream_enable_from && g.f_i != g.f_o) {
+ printf("got start_seq while stream_from is not empty\n");
return;
}
__disable_irq();
g.stream_started = 1;
- if (g.use_readinc) {
- attachInterruptVector(IRQ_PORTB, portb_isr_readinc);
- attachInterruptVector(IRQ_PORTC, portc_isr_nop);
+ if (g.stream_enable_to) {
+ if (g.use_readinc) {
+ attachInterruptVector(IRQ_PORTB, portb_isr_do_to_inc);
+ attachInterruptVector(IRQ_PORTC, portc_isr_nop);
+ }
+ else {
+ attachInterruptVector(IRQ_PORTB, portb_isr_do_to);
+ attachInterruptVector(IRQ_PORTC, portc_isr_frameinc);
+ }
}
- else {
- attachInterruptVector(IRQ_PORTB, portb_isr_read);
- attachInterruptVector(IRQ_PORTC, portc_isr_frameinc);
+ else if (g.stream_enable_from) {
+ if (g.use_readinc) {
+ attachInterruptVector(IRQ_PORTB,
+ portb_isr_fixed_do_from);
+ attachInterruptVector(IRQ_PORTC, portc_isr_nop);
+ }
+ else {
+ attachInterruptVector(IRQ_PORTB, portb_isr_fixed);
+ attachInterruptVector(IRQ_PORTC,
+ portc_isr_frameinc_do_from);
+ }
+
+ // prep first frame already
+ do_from_step();
}
__enable_irq();
}
-static int get_space(void)
+// callers must disable IRQs
+static void clear_state(void)
+{
+ g.stream_enable_to = 0;
+ g.stream_enable_from = 0;
+ g.use_readinc = 0;
+ g.stream_started = 0;
+ g.stream_ended = 0;
+ g.t_i = g.t_o = 0;
+ g.f_i = g.f_o = 0;
+ g.frame_cnt = 0;
+ attachInterruptVector(IRQ_PORTB, portb_isr_fixed);
+ attachInterruptVector(IRQ_PORTC, portc_isr_nop);
+}
+
+static int get_space_to(void)
{
- return STREAM_BUF_SIZE - ((g.i - g.o) & STREAM_BUF_MASK);
+ return STREAM_BUF_SIZE - ((g.t_i - g.t_o) & STREAM_BUF_MASK);
+}
+
+static int get_used_from(void)
+{
+ return (g.f_i - g.f_o) & STREAM_BUF_MASK;
}
static void do_usb(void *buf)
{
struct tas_pkt *pkt = buf;
- uint32_t i, g_i;
+ uint32_t t_i, i;
int space;
switch (pkt->type) {
break;
case PKT_STREAM_ENABLE:
__disable_irq();
+ clear_state();
/* wait for start from MD */
- g.stream_enable = 1;
- g.stream_started = 0;
- g.stream_received = 0;
- g.use_readinc = pkt->start.use_readinc;
- g.i = g.o = 0;
- g.frame_cnt = 0;
- attachInterruptVector(IRQ_PORTB, portb_isr_fixed);
- attachInterruptVector(IRQ_PORTC, portc_isr_nop);
+ g.stream_enable_to = pkt->enable.stream_to;
+ g.stream_enable_from = pkt->enable.stream_from;
+ g.use_readinc = pkt->enable.use_readinc;
+ __enable_irq();
+ break;
+ case PKT_STREAM_ABORT:
+ __disable_irq();
+ clear_state();
__enable_irq();
break;
case PKT_STREAM_END:
- g.stream_received = 1;
+ g.stream_ended = 1;
printf("end of stream\n");
break;
- case PKT_STREAM_DATA:
- g_i = g.i;
- space = get_space();
- if (space <= sizeof(pkt->data) / STREAM_EL_SZ) {
+ case PKT_STREAM_DATA_TO:
+ t_i = g.t_i;
+ space = get_space_to();
+ if (space <= pkt->size / STREAM_EL_SZ) {
printf("got data pkt while space=%d\n", space);
return;
}
- for (i = 0; i < sizeof(pkt->data) / STREAM_EL_SZ; i++) {
- memcpy(&g.stream[g_i++],
+ for (i = 0; i < pkt->size / STREAM_EL_SZ; i++) {
+ memcpy(&g.stream_to[t_i++],
pkt->data + i * STREAM_EL_SZ,
STREAM_EL_SZ);
- g_i &= STREAM_BUF_MASK;
+ t_i &= STREAM_BUF_MASK;
}
- g.i = g_i;
+ g.t_i = t_i;
break;
default:
printf("got unknown pkt type: %04x\n", pkt->type);
while (1) {
struct tas_pkt pkt;
- while (g.stream_enable && !g.stream_received
- && get_space() > sizeof(pkt.data) / STREAM_EL_SZ)
+
+ while (g.stream_enable_to && !g.stream_ended
+ && get_space_to() > sizeof(pkt.data) / STREAM_EL_SZ)
{
pkt.type = PKT_STREAM_REQ;
pkt.req.frame = g.frame_cnt;
do_usb(buf);
}
+ while (g.stream_enable_from && !g.stream_ended
+ && get_used_from() >= sizeof(pkt.data) / STREAM_EL_SZ)
+ {
+ uint32_t f_o;
+ int i;
+
+ f_o = g.f_o;
+ for (i = 0; i < sizeof(pkt.data); i += STREAM_EL_SZ) {
+ memcpy(pkt.data + i, &g.stream_from[f_o++],
+ STREAM_EL_SZ);
+ f_o &= STREAM_BUF_MASK;
+ }
+ g.f_o = f_o;
+
+ pkt.type = PKT_STREAM_DATA_FROM;
+ pkt.size = i;
+
+ ret = usb_rawhid_send(&pkt, 1000);
+ if (ret != sizeof(pkt)) {
+ printf("send DATA_FROM: %d\n", ret);
+ break;
+ }
+ }
+
if (timeout == 1000) {
edge_cnt = g.edge_cnt;
//printf("e: %d th: %d\n", edge_cnt - edge_cnt_last,
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