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Handle index pulses on read.

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This commit is contained in:
David Given
2021-01-07 01:05:23 +01:00
parent a572742caa
commit 2ab00c42ff
1 changed files with 13 additions and 2 deletions
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15
lib/usb/greaseweazleusb.cc
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@@ -164,9 +164,7 @@ public:
br.seek(4);
nanoseconds_t freq = br.read_le32();
std::cout << fmt::format("freq={}\n", freq);
_clock = 1000000000 / freq;
std::cout << fmt::format("_clock={}\n", _clock);
br.seek(0);
return br.read_be16();
@@ -264,6 +262,7 @@ public:
{
uint64_t ticks_gw = 0;
uint64_t lastevent_fl = 0;
uint64_t indexticks_gw = 0;
for (;;)
{
uint8_t b = read_byte();
@@ -275,7 +274,19 @@ public:
switch (read_byte())
{
case FLUXOP_INDEX:
{
indexticks_gw += read_28();
uint64_t ticks_fl = (indexticks_gw * _clock) / NS_PER_TICK;
uint64_t delta_fl = ticks_fl - lastevent_fl;
while (delta_fl > 0x3f)
{
bw.write_8(0x3f);
delta_fl -= 0x3f;
}
bw.write_8(delta_fl | F_BIT_INDEX);
lastevent_fl = ticks_fl;
break;
}
case FLUXOP_SPACE:
ticks_gw += read_28();