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-rw-r--r--host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp155
1 files changed, 90 insertions, 65 deletions
diff --git a/host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp b/host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp
index d6e68c636..0f652b294 100644
--- a/host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp
@@ -47,7 +47,8 @@ public:
usrp2_fifo_ctrl_impl(zero_copy_if::sptr xport):
_xport(xport),
- _seq(0), _last_seq_ack(0),
+ _seq_out(0),
+ _seq_ack(0),
_timeout(ACK_TIMEOUT)
{
while (_xport->get_recv_buff(0.0)){} //flush
@@ -63,48 +64,15 @@ public:
)
}
- UHD_INLINE void send_pkt(wb_addr_type addr, boost::uint32_t data, int cmd){
- managed_send_buffer::sptr buff = _xport->get_send_buff(0.0);
- if (not buff){
- throw uhd::runtime_error("fifo ctrl timed out getting a send buffer");
- }
- boost::uint32_t *trans = buff->cast<boost::uint32_t *>();
- trans[0] = htonl(++_seq);
- boost::uint32_t *pkt = trans + 1;
-
- //load packet info
- vrt::if_packet_info_t packet_info;
- packet_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_CONTEXT;
- packet_info.num_payload_words32 = 2;
- packet_info.num_payload_bytes = packet_info.num_payload_words32*sizeof(boost::uint32_t);
- packet_info.packet_count = _seq;
- packet_info.tsf = _time.to_ticks(_tick_rate);
- packet_info.sob = false;
- packet_info.eob = false;
- packet_info.has_sid = false;
- packet_info.has_cid = false;
- packet_info.has_tsi = false;
- packet_info.has_tsf = _use_time;
- packet_info.has_tlr = false;
-
- //load header
- vrt::if_hdr_pack_be(pkt, packet_info);
-
- //load payload
- const boost::uint32_t ctrl_word = (addr & 0xff) | cmd | (_seq << 16);
- pkt[packet_info.num_header_words32+0] = htonl(ctrl_word);
- pkt[packet_info.num_header_words32+1] = htonl(data);
-
- //send the buffer over the interface
- buff->commit(sizeof(boost::uint32_t)*(packet_info.num_packet_words32+1));
- }
-
+ /*******************************************************************
+ * Peek and poke 32 bit implementation
+ ******************************************************************/
void poke32(wb_addr_type addr, boost::uint32_t data){
boost::mutex::scoped_lock lock(_mutex);
this->send_pkt((addr - SETTING_REGS_BASE)/4, data, POKE32_CMD);
- this->wait_for_ack(boost::int16_t(_seq-MAX_SEQS_OUT));
+ this->wait_for_ack(_seq_out-MAX_SEQS_OUT);
}
boost::uint32_t peek32(wb_addr_type addr){
@@ -112,29 +80,12 @@ public:
this->send_pkt((addr - READBACK_BASE)/4, 0, PEEK32_CMD);
- return this->wait_for_ack(boost::int16_t(_seq));
- }
-
- UHD_INLINE boost::uint32_t wait_for_ack(const boost::int16_t seq_to_ack){
-
- while (_last_seq_ack < seq_to_ack){
- managed_recv_buffer::sptr buff = _xport->get_recv_buff(_timeout);
- if (not buff){
- throw uhd::runtime_error("fifo ctrl timed out looking for acks");
- }
- const boost::uint32_t *pkt = buff->cast<const boost::uint32_t *>();
- vrt::if_packet_info_t packet_info;
- packet_info.num_packet_words32 = buff->size()/sizeof(boost::uint32_t);
- vrt::if_hdr_unpack_be(pkt, packet_info);
- _last_seq_ack = ntohl(pkt[packet_info.num_header_words32+0]) >> 16;
- if (_last_seq_ack == seq_to_ack){
- return ntohl(pkt[packet_info.num_header_words32+1]);
- }
- }
-
- return 0;
+ return this->wait_for_ack(_seq_out);
}
+ /*******************************************************************
+ * Peek and poke 16 bit not implemented
+ ******************************************************************/
void poke16(wb_addr_type, boost::uint16_t){
throw uhd::not_implemented_error("poke16 not implemented in fifo ctrl module");
}
@@ -143,11 +94,14 @@ public:
throw uhd::not_implemented_error("peek16 not implemented in fifo ctrl module");
}
+ /*******************************************************************
+ * FIFO controlled SPI implementation
+ ******************************************************************/
void init_spi(void){
boost::mutex::scoped_lock lock(_mutex);
this->send_pkt(SPI_DIV, SPI_DIVIDER, POKE32_CMD);
- this->wait_for_ack(boost::int16_t(_seq-MAX_SEQS_OUT));
+ this->wait_for_ack(_seq_out-MAX_SEQS_OUT);
_ctrl_word_cache = 0; // force update first time around
}
@@ -174,23 +128,26 @@ public:
//conditionally send control word
if (_ctrl_word_cache != ctrl_word){
this->send_pkt(SPI_CTRL, ctrl_word, POKE32_CMD);
- this->wait_for_ack(boost::int16_t(_seq-MAX_SEQS_OUT));
+ this->wait_for_ack(_seq_out-MAX_SEQS_OUT);
_ctrl_word_cache = ctrl_word;
}
//send data word
this->send_pkt(SPI_DATA, data_out, POKE32_CMD);
- this->wait_for_ack(boost::int16_t(_seq-MAX_SEQS_OUT));
+ this->wait_for_ack(_seq_out-MAX_SEQS_OUT);
//conditional readback
if (readback){
this->send_pkt(SPI_READBACK, 0, PEEK32_CMD);
- return this->wait_for_ack(boost::int16_t(_seq));
+ return this->wait_for_ack(_seq_out);
}
return 0;
}
+ /*******************************************************************
+ * Update methods for time
+ ******************************************************************/
void set_time(const uhd::time_spec_t &time){
boost::mutex::scoped_lock lock(_mutex);
_time = time;
@@ -204,10 +161,78 @@ public:
}
private:
+
+ /*******************************************************************
+ * Primary control and interaction private methods
+ ******************************************************************/
+ UHD_INLINE void send_pkt(wb_addr_type addr, boost::uint32_t data, int cmd){
+ managed_send_buffer::sptr buff = _xport->get_send_buff(0.0);
+ if (not buff){
+ throw uhd::runtime_error("fifo ctrl timed out getting a send buffer");
+ }
+ boost::uint32_t *trans = buff->cast<boost::uint32_t *>();
+ trans[0] = htonl(++_seq_out);
+ boost::uint32_t *pkt = trans + 1;
+
+ //load packet info
+ vrt::if_packet_info_t packet_info;
+ packet_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_CONTEXT;
+ packet_info.num_payload_words32 = 2;
+ packet_info.num_payload_bytes = packet_info.num_payload_words32*sizeof(boost::uint32_t);
+ packet_info.packet_count = _seq_out;
+ packet_info.tsf = _time.to_ticks(_tick_rate);
+ packet_info.sob = false;
+ packet_info.eob = false;
+ packet_info.has_sid = false;
+ packet_info.has_cid = false;
+ packet_info.has_tsi = false;
+ packet_info.has_tsf = _use_time;
+ packet_info.has_tlr = false;
+
+ //load header
+ vrt::if_hdr_pack_be(pkt, packet_info);
+
+ //load payload
+ const boost::uint32_t ctrl_word = (addr & 0xff) | cmd | (_seq_out << 16);
+ pkt[packet_info.num_header_words32+0] = htonl(ctrl_word);
+ pkt[packet_info.num_header_words32+1] = htonl(data);
+
+ //send the buffer over the interface
+ buff->commit(sizeof(boost::uint32_t)*(packet_info.num_packet_words32+1));
+ }
+
+ UHD_INLINE bool wraparound_lt16(const boost::int16_t i0, const boost::int16_t i1){
+ if (i0 == i1) return false;
+ const int s0 = boost::uint16_t(i0) >> 15;
+ const int s1 = boost::uint16_t(i1) >> 15;
+ if (s0 != s1) return boost::int16_t(i1 - i0) > 0;
+ return boost::uint16_t(i0) < boost::uint16_t(i1);
+ }
+
+ UHD_INLINE boost::uint32_t wait_for_ack(const boost::uint16_t seq_to_ack){
+
+ while (wraparound_lt16(_seq_ack, seq_to_ack)){
+ managed_recv_buffer::sptr buff = _xport->get_recv_buff(_timeout);
+ if (not buff){
+ throw uhd::runtime_error("fifo ctrl timed out looking for acks");
+ }
+ const boost::uint32_t *pkt = buff->cast<const boost::uint32_t *>();
+ vrt::if_packet_info_t packet_info;
+ packet_info.num_packet_words32 = buff->size()/sizeof(boost::uint32_t);
+ vrt::if_hdr_unpack_be(pkt, packet_info);
+ _seq_ack = ntohl(pkt[packet_info.num_header_words32+0]) >> 16;
+ if (_seq_ack == seq_to_ack){
+ return ntohl(pkt[packet_info.num_header_words32+1]);
+ }
+ }
+
+ return 0;
+ }
+
zero_copy_if::sptr _xport;
boost::mutex _mutex;
- boost::uint32_t _seq;
- boost::uint16_t _last_seq_ack;
+ boost::uint16_t _seq_out;
+ boost::uint16_t _seq_ack;
uhd::time_spec_t _time;
bool _use_time;
double _tick_rate;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 19:36:28 +0000