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FMC TDC 1ns 5cha - Software
Commit fab0932d authored by Federico Vaga's avatar Federico Vaga
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lib: read last timestamp 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent b94a55ac
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Showing with 48 additions and 0 deletions
lib/fmctdc-lib-private.h
View file @ fab0932d
...@@ -28,6 +28,7 @@ struct __fmctdc_board { ...@@ -28,6 +28,7 @@ struct __fmctdc_board {
int dev_id; int dev_id;
char *devbase; char *devbase;
char *sysbase; char *sysbase;
int fdcc[FMCTDC_NUM_CHANNELS]; /**< current controls */
int fdc[5]; /* The 5 control channels */ int fdc[5]; /* The 5 control channels */
int fdd[5]; /* The 5 data channels */ int fdd[5]; /* The 5 data channels */
int ch_ref[FMCTDC_NUM_CHANNELS]; /**< reference channel */ int ch_ref[FMCTDC_NUM_CHANNELS]; /**< reference channel */
......
lib/fmctdc-lib.c
View file @ fab0932d
...@@ -171,6 +171,7 @@ struct fmctdc_board *fmctdc_open(int offset, int dev_id) ...@@ -171,6 +171,7 @@ struct fmctdc_board *fmctdc_open(int offset, int dev_id)
{ {
struct __fmctdc_board *b = NULL; struct __fmctdc_board *b = NULL;
uint32_t nsamples = NSAMPLE; uint32_t nsamples = NSAMPLE;
char path[128];
int i; int i;
if (offset >= ft_nboards) { if (offset >= ft_nboards) {
...@@ -203,7 +204,20 @@ found: ...@@ -203,7 +204,20 @@ found:
fmctdc_sysfs_set(b, "ft-ch4/trigger/post-samples", &nsamples); fmctdc_sysfs_set(b, "ft-ch4/trigger/post-samples", &nsamples);
fmctdc_sysfs_set(b, "ft-ch5/trigger/post-samples", &nsamples); fmctdc_sysfs_set(b, "ft-ch5/trigger/post-samples", &nsamples);
for (i = 0; i < FMCTDC_NUM_CHANNELS; i++) {
snprintf(path, sizeof(path), "%s/ft-ch%d/chan0/current-control",
b->sysbase, i + 1);
b->fdcc[i] = open(path, O_RDONLY);
if (b->fdcc[i] < 0)
goto error;
}
return (void *)b; return (void *)b;
error:
while (--i)
close(b->fdcc[i]);
return NULL;
} }
...@@ -255,6 +269,9 @@ int fmctdc_close(struct fmctdc_board *userb) ...@@ -255,6 +269,9 @@ int fmctdc_close(struct fmctdc_board *userb)
if (b->fdd[j] >= 0) if (b->fdd[j] >= 0)
close(b->fdd[j]); close(b->fdd[j]);
b->fdd[j] = -1; b->fdd[j] = -1;
if (b->fdcc[j] >= 0)
close(b->fdcc[j]);
b->fdcc[j] = -1;
} }
return 0; return 0;
...@@ -565,6 +582,34 @@ int fmctdc_fileno_channel(struct fmctdc_board *userb, unsigned int channel) ...@@ -565,6 +582,34 @@ int fmctdc_fileno_channel(struct fmctdc_board *userb, unsigned int channel)
} }
/**
* It reads the very last time-stamp produced by a given channel. Note that
* the last time-stamp is the last produced by the hardware and not the last
* read by the user. Between the hardware and the user there is a buffer.
* @param[in] userb TDC board instance token
* @param[in] channel channel to use [0, 4]
* @param[out] t where to write the time-stamps
* @return number of acquired time-stamps, otherwise -1 and errno is set
*/
int fmctdc_read_last(struct fmctdc_board *userb, unsigned int channel,
struct fmctdc_time *t)
{
__define_board(b, userb);
struct zio_control ctrl;
int n;
if (channel >= FMCTDC_NUM_CHANNELS) {
errno = EINVAL;
return -1;
}
n = read(b->fdcc[channel], &ctrl, sizeof(struct zio_control));
if (n != sizeof(struct zio_control))
return -1;
return 1;
}
/** /**
* It reads a given number of time-stamps from the driver. It will wait at * It reads a given number of time-stamps from the driver. It will wait at
* most once and return the number of samples that it received from a given * most once and return the number of samples that it received from a given
......
lib/fmctdc-lib.h
View file @ fab0932d
...@@ -152,6 +152,8 @@ extern int fmctdc_fread(struct fmctdc_board *b, unsigned int channel, ...@@ -152,6 +152,8 @@ extern int fmctdc_fread(struct fmctdc_board *b, unsigned int channel,
extern int fmctdc_fileno_channel(struct fmctdc_board *b, unsigned int channel); extern int fmctdc_fileno_channel(struct fmctdc_board *b, unsigned int channel);
extern int fmctdc_read(struct fmctdc_board *b, unsigned int channel, extern int fmctdc_read(struct fmctdc_board *b, unsigned int channel,
struct fmctdc_time *t, int n, int flags); struct fmctdc_time *t, int n, int flags);
extern int fmctdc_read_last(struct fmctdc_board *userb, unsigned int channel,
struct fmctdc_time *t);
extern int fmctdc_flush(struct fmctdc_board *userb, unsigned int channel); extern int fmctdc_flush(struct fmctdc_board *userb, unsigned int channel);
/**@}*/ /**@}*/
......
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