75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
|
/*
|
||
|
|
* Copyright 2012 Will Code? (TODO: Proper attribution)
|
||
|
|
* Copyright 2014 Jared Boone <jared@sharebrained.com>
|
||
|
|
*
|
||
|
|
* This file is part of HackRF.
|
||
|
|
*
|
||
|
|
* 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 2, 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; see the file COPYING. If not, write to
|
||
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
||
|
|
* Boston, MA 02110-1301, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "max2837_target.h"
|
||
|
|
|
||
|
|
#include <libopencm3/lpc43xx/scu.h>
|
||
|
|
#include "hackrf_core.h"
|
||
|
|
|
||
|
|
void max2837_target_init(max2837_driver_t* const drv) {
|
||
|
|
/* Configure SSP1 Peripheral (to be moved later in SSP driver) */
|
||
|
|
scu_pinmux(SCU_SSP1_CIPO, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
|
||
|
|
scu_pinmux(SCU_SSP1_COPI, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
|
||
|
|
scu_pinmux(SCU_SSP1_SCK, (SCU_SSP_IO | SCU_CONF_FUNCTION1));
|
||
|
|
|
||
|
|
scu_pinmux(SCU_XCVR_CS, SCU_GPIO_FAST);
|
||
|
|
|
||
|
|
/* Configure XCVR_CTL GPIO pins. */
|
||
|
|
scu_pinmux(SCU_XCVR_ENABLE, SCU_GPIO_FAST);
|
||
|
|
scu_pinmux(SCU_XCVR_RXENABLE, SCU_GPIO_FAST);
|
||
|
|
scu_pinmux(SCU_XCVR_TXENABLE, SCU_GPIO_FAST);
|
||
|
|
|
||
|
|
/* Set GPIO pins as outputs. */
|
||
|
|
gpio_output(drv->gpio_enable);
|
||
|
|
gpio_output(drv->gpio_rx_enable);
|
||
|
|
gpio_output(drv->gpio_tx_enable);
|
||
|
|
}
|
||
|
|
|
||
|
|
void max2837_target_set_mode(max2837_driver_t* const drv, const max2837_mode_t new_mode) {
|
||
|
|
/* MAX2837_MODE_SHUTDOWN:
|
||
|
|
* All circuit blocks are powered down, except the 4-wire serial bus
|
||
|
|
* and its internal programmable registers.
|
||
|
|
*
|
||
|
|
* MAX2837_MODE_STANDBY:
|
||
|
|
* Used to enable the frequency synthesizer block while the rest of the
|
||
|
|
* device is powered down. In this mode, PLL, VCO, and LO generator
|
||
|
|
* are on, so that Tx or Rx modes can be quickly enabled from this mode.
|
||
|
|
* These and other blocks can be selectively enabled in this mode.
|
||
|
|
*
|
||
|
|
* MAX2837_MODE_TX:
|
||
|
|
* All Tx circuit blocks are powered on. The external PA is powered on
|
||
|
|
* after a programmable delay using the on-chip PA bias DAC. The slow-
|
||
|
|
* charging Rx circuits are in a precharged “idle-off” state for fast
|
||
|
|
* Tx-to-Rx turnaround time.
|
||
|
|
*
|
||
|
|
* MAX2837_MODE_RX:
|
||
|
|
* All Rx circuit blocks are powered on and active. Antenna signal is
|
||
|
|
* applied; RF is downconverted, filtered, and buffered at Rx BB I and Q
|
||
|
|
* outputs. The slow- charging Tx circuits are in a precharged “idle-off”
|
||
|
|
* state for fast Rx-to-Tx turnaround time.
|
||
|
|
*/
|
||
|
|
gpio_write(drv->gpio_enable, new_mode != MAX2837_MODE_SHUTDOWN);
|
||
|
|
gpio_write(drv->gpio_rx_enable, new_mode == MAX2837_MODE_RX);
|
||
|
|
gpio_write(drv->gpio_tx_enable, new_mode == MAX2837_MODE_TX);
|
||
|
|
drv->mode = new_mode;
|
||
|
|
}
|