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