Hi all,
I am writing a UHD driver for a new daughter board. I am having some
problem regarding the GPIO/ATR register settings. I am able to use the
daughter board with USRP1, but not with USRP2. With USRP2, I think,
uhd_fft.py just shows noise.
In the receiver class (inherited from rx_dboard_base), I am setting these
registers like this -
#define TX_EN (1 << 6)
this->get_iface()->set_clock_enabled(dboard_iface::UNIT_RX, true);
this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, TX_EN );
this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, TX_EN );
//setup the rx atr (this does not change with antenna)
this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX,
dboard_iface::ATR_REG_IDLE, 0);
this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX,
dboard_iface::ATR_REG_FULL_DUPLEX, TX_EN);
this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, TX_EN);
But, USRP1 also works when I comment this piece of code. Can some one help
me out with this?
I dont know much about the GPIO and ATR registers. Can some one point me to
some documents?
Thanks,
Sriharsha Puranik.
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