mirror of https://github.com/m-labs/artiq
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
#include "mailbox.h"
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#include "messages.h"
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#include "rtio.h"
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#include "ttl.h"
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#include "dds.h"
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#include "bridge.h"
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#define TIME_BUFFER (8000 << RTIO_FINE_TS_WIDTH)
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static void dds_write(int addr, int data)
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{
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rtio_chan_sel_write(RTIO_DDS_CHANNEL);
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rtio_o_address_write(addr);
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rtio_o_data_write(data);
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rtio_o_timestamp_write(rtio_get_counter() + TIME_BUFFER);
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rtio_o_we_write(1);
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}
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static int dds_read(int addr)
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{
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int r;
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#ifdef DDS_AD9858
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#define DDS_READ_FLAG 128
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#endif
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#ifdef DDS_AD9914
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#define DDS_READ_FLAG 256
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#endif
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dds_write(addr | DDS_READ_FLAG, 0);
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while(rtio_i_status_read() & RTIO_I_STATUS_EMPTY);
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r = rtio_i_data_read();
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rtio_i_re_write(1);
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return r;
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}
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static void send_ready(void)
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{
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struct msg_base msg;
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msg.type = MESSAGE_TYPE_BRG_READY;
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mailbox_send_and_wait(&msg);
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}
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void bridge_main(void)
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{
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struct msg_base *umsg;
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rtio_init();
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send_ready();
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while(1) {
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umsg = mailbox_wait_and_receive();
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switch(umsg->type) {
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case MESSAGE_TYPE_BRG_TTL_OE: {
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struct msg_brg_ttl_out *msg;
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msg = (struct msg_brg_ttl_out *)umsg;
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ttl_set_oe(rtio_get_counter() + TIME_BUFFER, msg->channel, msg->value);
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mailbox_acknowledge();
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break;
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}
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case MESSAGE_TYPE_BRG_TTL_O: {
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struct msg_brg_ttl_out *msg;
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msg = (struct msg_brg_ttl_out *)umsg;
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ttl_set_o(rtio_get_counter() + TIME_BUFFER, msg->channel, msg->value);
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mailbox_acknowledge();
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break;
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}
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case MESSAGE_TYPE_BRG_DDS_SEL: {
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struct msg_brg_dds_sel *msg;
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msg = (struct msg_brg_dds_sel *)umsg;
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dds_write(DDS_GPIO, msg->channel << 1);
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mailbox_acknowledge();
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break;
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}
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case MESSAGE_TYPE_BRG_DDS_RESET: {
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unsigned int g;
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g = dds_read(DDS_GPIO);
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dds_write(DDS_GPIO, g | 1);
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dds_write(DDS_GPIO, g);
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mailbox_acknowledge();
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break;
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}
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case MESSAGE_TYPE_BRG_DDS_READ_REQUEST: {
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struct msg_brg_dds_read_request *msg;
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struct msg_brg_dds_read_reply rmsg;
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msg = (struct msg_brg_dds_read_request *)umsg;
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rmsg.type = MESSAGE_TYPE_BRG_DDS_READ_REPLY;
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rmsg.data = dds_read(msg->address);
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mailbox_send_and_wait(&rmsg);
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break;
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}
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case MESSAGE_TYPE_BRG_DDS_WRITE: {
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struct msg_brg_dds_write *msg;
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msg = (struct msg_brg_dds_write *)umsg;
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dds_write(msg->address, msg->data);
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mailbox_acknowledge();
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break;
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}
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case MESSAGE_TYPE_BRG_DDS_FUD:
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dds_write(DDS_FUD, 0);
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mailbox_acknowledge();
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break;
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default:
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mailbox_acknowledge();
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break;
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}
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}
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}
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