diff options
Diffstat (limited to 'core/serial_ftdi.c')
| -rw-r--r-- | core/serial_ftdi.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/core/serial_ftdi.c b/core/serial_ftdi.c index b3f2f2f37..084fb230f 100644 --- a/core/serial_ftdi.c +++ b/core/serial_ftdi.c @@ -103,6 +103,20 @@ static dc_status_t serial_ftdi_get_transmitted (ftdi_serial_t *device) return DC_STATUS_UNSUPPORTED; } +/* + * Get an msec value on some random base + */ +static unsigned int serial_ftdi_get_msec(void) +{ +#ifdef _WIN32 + return GetTickCount(); +#else + struct timeval tv; + gettimeofday(&tv, NULL); + return tv.tv_sec * 1000 + tv.tv_usec / 1000; +#endif +} + static dc_status_t serial_ftdi_sleep (void *io, unsigned int timeout) { ftdi_serial_t *device = io; @@ -390,8 +404,7 @@ static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t * if (timeout == -1) timeout = 10000; - int backoff = 1; - int slept = 0; + unsigned int start_time = serial_ftdi_get_msec(); unsigned int nbytes = 0; while (nbytes < size) { int n = ftdi_read_data (device->ftdi_ctx, (unsigned char *) data + nbytes, size - nbytes); @@ -401,12 +414,11 @@ static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t * ERROR (device->context, "%s", ftdi_get_error_string(device->ftdi_ctx)); return DC_STATUS_IO; //Error during read call. } else if (n == 0) { - if (slept >= timeout) { + if (serial_ftdi_get_msec() - start_time > timeout) { ERROR(device->context, "%s", "FTDI read timed out."); return DC_STATUS_TIMEOUT; } - serial_ftdi_sleep (device, backoff); - slept += backoff; + serial_ftdi_sleep (device, 1); } nbytes += n; |