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artiq/soc/runtime/ttl.c
whitequark 62fdc75d2d Integrate libdyld and libunwind.
It is currently possible to run the idle experiment, and it
can raise and catch exceptions, but exceptions are not yet
propagated across RPC boundaries.
2015-08-02 15:43:03 +03:00

68 lines
1.9 KiB
C

#include <generated/csr.h>
#include "artiq_personality.h"
#include "rtio.h"
#include "ttl.h"
void ttl_set_o(long long int timestamp, int channel, int value)
{
rtio_chan_sel_write(channel);
rtio_o_timestamp_write(timestamp);
rtio_o_address_write(0);
rtio_o_data_write(value);
rtio_write_and_process_status(timestamp, channel);
}
void ttl_set_oe(long long int timestamp, int channel, int oe)
{
rtio_chan_sel_write(channel);
rtio_o_timestamp_write(timestamp);
rtio_o_address_write(1);
rtio_o_data_write(oe);
rtio_write_and_process_status(timestamp, channel);
}
void ttl_set_sensitivity(long long int timestamp, int channel, int sensitivity)
{
rtio_chan_sel_write(channel);
rtio_o_timestamp_write(timestamp);
rtio_o_address_write(2);
rtio_o_data_write(sensitivity);
rtio_write_and_process_status(timestamp, channel);
}
long long int ttl_get(int channel, long long int time_limit)
{
long long int r;
int status;
rtio_chan_sel_write(channel);
while((status = rtio_i_status_read())) {
if(rtio_i_status_read() & RTIO_I_STATUS_OVERFLOW) {
rtio_i_overflow_reset_write(1);
artiq_raise_from_c("RTIOOverflow",
"RTIO overflow at channel {0}",
channel, 0, 0);
}
if(rtio_get_counter() >= time_limit) {
/* check empty flag again to prevent race condition.
* now we are sure that the time limit has been exceeded.
*/
if(rtio_i_status_read() & RTIO_I_STATUS_EMPTY)
return -1;
}
/* input FIFO is empty - keep waiting */
}
r = rtio_i_timestamp_read();
rtio_i_re_write(1);
return r;
}
void ttl_clock_set(long long int timestamp, int channel, int ftw)
{
rtio_chan_sel_write(channel);
rtio_o_timestamp_write(timestamp);
rtio_o_data_write(ftw);
rtio_write_and_process_status(timestamp, channel);
}