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//
// Copyright 2010-2012 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "usrp1_iface.hpp"
#include <uhd/utils/log.hpp>
#include <uhd/exception.hpp>
#include <uhd/utils/byteswap.hpp>
#include <boost/format.hpp>
#include <stdexcept>
#include <iomanip>
using namespace uhd;
using namespace uhd::usrp;
using namespace uhd::transport;
class usrp1_iface_impl : public usrp1_iface{
public:
/*******************************************************************
* Structors
******************************************************************/
usrp1_iface_impl(uhd::usrp::fx2_ctrl::sptr ctrl_transport)
{
_ctrl_transport = ctrl_transport;
}
~usrp1_iface_impl(void)
{
/* NOP */
}
/*******************************************************************
* Peek and Poke
******************************************************************/
void poke32(const uint32_t addr, const uint32_t value)
{
uint32_t swapped = uhd::htonx(value);
UHD_LOGGER_DEBUG("USRP1")
<< "poke32("
<< std::dec << std::setw(2) << addr << ", 0x"
<< std::hex << std::setw(8) << value << ")"
;
uint8_t w_index_h = SPI_ENABLE_FPGA & 0xff;
uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_1) & 0xff;
int ret =_ctrl_transport->usrp_control_write(
VRQ_SPI_WRITE,
addr & 0x7f,
(w_index_h << 8) | (w_index_l << 0),
(unsigned char*) &swapped,
sizeof(uint32_t));
if (ret < 0) throw uhd::io_error("USRP1: failed control write");
}
uint32_t peek32(const uint32_t addr)
{
UHD_LOGGER_DEBUG("USRP1")
<< "peek32("
<< std::dec << std::setw(2) << addr << ")"
;
uint32_t value_out;
uint8_t w_index_h = SPI_ENABLE_FPGA & 0xff;
uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_1) & 0xff;
int ret = _ctrl_transport->usrp_control_read(
VRQ_SPI_READ,
0x80 | (addr & 0x7f),
(w_index_h << 8) | (w_index_l << 0),
(unsigned char*) &value_out,
sizeof(uint32_t));
if (ret < 0) throw uhd::io_error("USRP1: failed control read");
return uhd::ntohx(value_out);
}
void poke16(const uint32_t, const uint16_t) {
throw uhd::not_implemented_error("Unhandled command poke16()");
}
uint16_t peek16(const uint32_t) {
throw uhd::not_implemented_error("Unhandled command peek16()");
return 0;
}
/*******************************************************************
* I2C
******************************************************************/
void write_i2c(uint16_t addr, const byte_vector_t &bytes){
return _ctrl_transport->write_i2c(addr, bytes);
}
byte_vector_t read_i2c(uint16_t addr, size_t num_bytes){
return _ctrl_transport->read_i2c(addr, num_bytes);
}
/*******************************************************************
* SPI
*
* For non-readback transactions use the SPI_WRITE command, which is
* simpler and uses the USB control buffer for OUT data. No data
* needs to be returned.
*
* For readback transactions use SPI_TRANSACT, which places up to
* 4 bytes of OUT data in the device request fields and uses the
* control buffer for IN data.
******************************************************************/
uint32_t transact_spi(int which_slave,
const spi_config_t &,
uint32_t bits,
size_t num_bits,
bool readback)
{
UHD_LOGGER_DEBUG("USRP1")
<< "transact_spi: "
<< " slave: " << which_slave
<< " bits: " << bits
<< " num_bits: " << num_bits
<< " readback: " << readback
;
UHD_ASSERT_THROW((num_bits <= 32) && !(num_bits % 8));
size_t num_bytes = num_bits / 8;
if (readback) {
unsigned char buff[4] = {
(unsigned char)(bits & 0xff),
(unsigned char)((bits >> 8) & 0xff),
(unsigned char)((bits >> 16) & 0xff),
(unsigned char)((bits >> 24) & 0xff)
};
//conditions where there are two header bytes
if (num_bytes >= 3 and buff[num_bytes-1] != 0 and buff[num_bytes-2] != 0 and buff[num_bytes-3] == 0){
if (int(num_bytes-2) != _ctrl_transport->usrp_control_read(
VRQ_SPI_READ, (buff[num_bytes-1] << 8) | (buff[num_bytes-2] << 0),
(which_slave << 8) | SPI_FMT_MSB | SPI_FMT_HDR_2,
buff, num_bytes-2
)) throw uhd::io_error("USRP1: failed SPI readback transaction");
}
//conditions where there is one header byte
else if (num_bytes >= 2 and buff[num_bytes-1] != 0 and buff[num_bytes-2] == 0){
if (int(num_bytes-1) != _ctrl_transport->usrp_control_read(
VRQ_SPI_READ, buff[num_bytes-1],
(which_slave << 8) | SPI_FMT_MSB | SPI_FMT_HDR_1,
buff, num_bytes-1
)) throw uhd::io_error("USRP1: failed SPI readback transaction");
}
else{
throw uhd::io_error("USRP1: invalid input data for SPI readback");
}
uint32_t val = (((uint32_t)buff[0]) << 0) |
(((uint32_t)buff[1]) << 8) |
(((uint32_t)buff[2]) << 16) |
(((uint32_t)buff[3]) << 24);
return val;
}
else {
// Byteswap on num_bytes
unsigned char buff[4] = { 0 };
for (size_t i = 1; i <= num_bytes; i++)
buff[num_bytes - i] = (bits >> ((i - 1) * 8)) & 0xff;
uint8_t w_index_h = which_slave & 0xff;
uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_0) & 0xff;
int ret =_ctrl_transport->usrp_control_write(
VRQ_SPI_WRITE,
0x00,
(w_index_h << 8) | (w_index_l << 0),
buff, num_bytes);
if (ret < 0) throw uhd::io_error("USRP1: failed SPI transaction");
return 0;
}
}
private:
uhd::usrp::fx2_ctrl::sptr _ctrl_transport;
};
/***********************************************************************
* Public Make Function
**********************************************************************/
usrp1_iface::sptr usrp1_iface::make(uhd::usrp::fx2_ctrl::sptr ctrl_transport)
{
return sptr(new usrp1_iface_impl(ctrl_transport));
}
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