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Use a standard timer for the DaynaPort delay work-around (#1357)

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* Do not use the proprietary system timer for the DaynaPort delay work-around
This commit is contained in:
Uwe Seimet 2023-11-15 07:51:21 +01:00 committed by Daniel Markstedt
parent d1166ce13e
commit 7372996cf8
2 changed files with 7 additions and 4 deletions
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2
cpp/hal/bus.h
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@ -54,7 +54,7 @@ const static int SCSI_DELAY_FAST_NEGATION_PERIOD_NS = 30;
// The DaynaPort SCSI Link do a short delay in the middle of transfering
// a packet. This is the number of uS that will be delayed between the
// header and the actual data.
const static int SCSI_DELAY_SEND_DATA_DAYNAPORT_US = 100;
const static int SCSI_DELAY_SEND_DATA_DAYNAPORT_NS = 100'000;
class bus_exception : public runtime_error

9
cpp/hal/gpiobus.cpp
View File

@ -15,7 +15,7 @@
#include <spdlog/spdlog.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <time.h>
#ifdef __linux__
#include <sys/epoll.h>
#endif
@ -278,9 +278,12 @@ int GPIOBUS::SendHandShake(uint8_t *buf, int count, int delay_after_bytes)
if (actmode == mode_e::TARGET) {
for (i = 0; i < count; i++) {
if (i == delay_after_bytes) {
spdlog::trace("DELAYING for " + to_string(SCSI_DELAY_SEND_DATA_DAYNAPORT_US) + " us after " +
spdlog::trace("DELAYING for " + to_string(SCSI_DELAY_SEND_DATA_DAYNAPORT_NS) + " ns after " +
to_string(delay_after_bytes) + " bytes");
SysTimer::SleepUsec(SCSI_DELAY_SEND_DATA_DAYNAPORT_US);
EnableIRQ();
const timespec ts = { .tv_sec = 0, .tv_nsec = SCSI_DELAY_SEND_DATA_DAYNAPORT_NS};
nanosleep(&ts, nullptr);
DisableIRQ();
}
// Set the DATA signals