148 lines
4.4 KiB
C
148 lines
4.4 KiB
C
/*
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* Copyright 2012 Will Code? (TODO: Proper attribution)
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* Copyright 2014 Jared Boone <jared@sharebrained.com>
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*
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* This file is part of HackRF.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "max2837_target.h"
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#include <libopencm3/lpc43xx/scu.h>
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#include <libopencm3/lpc43xx/gpio.h>
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#include "hackrf_core.h"
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void max2837_target_init(max2837_driver_t* const drv) {
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(void)drv;
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scu_pinmux(SCU_XCVR_CS, SCU_GPIO_FAST);
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GPIO_SET(PORT_XCVR_CS) = PIN_XCVR_CS;
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GPIO_DIR(PORT_XCVR_CS) |= PIN_XCVR_CS;
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/* Configure XCVR_CTL GPIO pins. */
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#ifdef JELLYBEAN
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scu_pinmux(SCU_XCVR_RXHP, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B1, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B2, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B3, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B4, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B5, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B6, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_B7, SCU_GPIO_FAST);
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#endif
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scu_pinmux(SCU_XCVR_ENABLE, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_RXENABLE, SCU_GPIO_FAST);
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scu_pinmux(SCU_XCVR_TXENABLE, SCU_GPIO_FAST);
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/* Set GPIO pins as outputs. */
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GPIO2_DIR |= (PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE);
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#ifdef JELLYBEAN
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GPIO_DIR(PORT_XCVR_RXHP) |= PIN_XCVR_RXHP;
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GPIO_DIR(PORT_XCVR_B) |=
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PIN_XCVR_B1
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| PIN_XCVR_B2
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| PIN_XCVR_B3
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| PIN_XCVR_B4
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| PIN_XCVR_B5
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| PIN_XCVR_B6
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| PIN_XCVR_B7
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;
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#endif
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#ifdef JELLYBEAN
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gpio_set(PORT_XCVR_RXHP, PIN_XCVR_RXHP);
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gpio_set(PORT_XCVR_B,
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PIN_XCVR_B1
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| PIN_XCVR_B2
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| PIN_XCVR_B3
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| PIN_XCVR_B4
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| PIN_XCVR_B5
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| PIN_XCVR_B6
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| PIN_XCVR_B7
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);
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#endif
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}
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void max2837_target_spi_select(spi_t* const spi) {
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(void)spi;
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gpio_clear(PORT_XCVR_CS, PIN_XCVR_CS);
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}
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void max2837_target_spi_unselect(spi_t* const spi) {
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(void)spi;
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gpio_set(PORT_XCVR_CS, PIN_XCVR_CS);
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}
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void max2837_mode_shutdown(max2837_driver_t* const drv) {
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(void)drv;
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/* All circuit blocks are powered down, except the 4-wire serial bus
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* and its internal programmable registers.
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*/
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gpio_clear(PORT_XCVR_ENABLE,
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(PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE));
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}
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void max2837_mode_standby(max2837_driver_t* const drv) {
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(void)drv;
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/* Used to enable the frequency synthesizer block while the rest of the
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* device is powered down. In this mode, PLL, VCO, and LO generator
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* are on, so that Tx or Rx modes can be quickly enabled from this mode.
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* These and other blocks can be selectively enabled in this mode.
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*/
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gpio_clear(PORT_XCVR_ENABLE, (PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE));
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gpio_set(PORT_XCVR_ENABLE, PIN_XCVR_ENABLE);
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}
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void max2837_mode_tx(max2837_driver_t* const drv) {
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(void)drv;
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/* All Tx circuit blocks are powered on. The external PA is powered on
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* after a programmable delay using the on-chip PA bias DAC. The slow-
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* charging Rx circuits are in a precharged “idle-off” state for fast
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* Tx-to-Rx turnaround time.
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*/
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gpio_clear(PORT_XCVR_ENABLE, PIN_XCVR_RXENABLE);
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gpio_set(PORT_XCVR_ENABLE,
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(PIN_XCVR_ENABLE | PIN_XCVR_TXENABLE));
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}
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void max2837_mode_rx(max2837_driver_t* const drv) {
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(void)drv;
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/* All Rx circuit blocks are powered on and active. Antenna signal is
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* applied; RF is downconverted, filtered, and buffered at Rx BB I and Q
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* outputs. The slow- charging Tx circuits are in a precharged “idle-off”
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* state for fast Rx-to-Tx turnaround time.
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*/
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gpio_clear(PORT_XCVR_ENABLE, PIN_XCVR_TXENABLE);
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gpio_set(PORT_XCVR_ENABLE,
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(PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE));
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}
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max2837_mode_t max2837_mode(max2837_driver_t* const drv) {
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(void)drv;
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if( gpio_get(PORT_XCVR_ENABLE, PIN_XCVR_ENABLE) ) {
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if( gpio_get(PORT_XCVR_ENABLE, PIN_XCVR_TXENABLE) ) {
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return MAX2837_MODE_TX;
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} else if( gpio_get(PORT_XCVR_ENABLE, PIN_XCVR_RXENABLE) ) {
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return MAX2837_MODE_RX;
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} else {
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return MAX2837_MODE_STANDBY;
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}
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} else {
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return MAX2837_MODE_SHUTDOWN;
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}
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}
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