Add "pin" interface to abstract GPIO pins.

firmware/common/pin.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * 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.
+ */
+
+#ifndef __PIN_H__
+#define __PIN_H__
+
+#include <stdbool.h>
+
+typedef const struct pin_t* pin_t;
+
+void pin_set(pin_t pin);
+void pin_clear(pin_t pin);
+void pin_toggle(pin_t pin);
+void pin_output(pin_t pin);
+void pin_input(pin_t pin);
+void pin_write(pin_t pin, const bool value);
+bool pin_read(pin_t pin);
+
+#endif/*__PIN_H__*/

firmware/common/pin_lpc.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * 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 "pin_lpc.h"
+
+#include <libopencm3/lpc43xx/gpio.h>
+
+void pin_set(pin_t pin) {
+	GPIO_SET(pin->gpio) = pin->mask;
+}
+
+void pin_clear(pin_t pin) {
+	GPIO_CLR(pin->gpio) = pin->mask;
+}
+
+void pin_toggle(pin_t pin) {
+	GPIO_NOT(pin->gpio) = pin->mask;
+}
+
+void pin_output(pin_t pin) {
+	GPIO_DIR(pin->gpio) |= pin->mask;
+}
+
+void pin_input(pin_t pin) {
+	GPIO_DIR(pin->gpio) &= ~pin->mask;
+}
+
+void pin_write(pin_t pin, const bool value) {
+	MMIO32(pin->gpio_w) = value;
+}
+
+bool pin_read(pin_t pin) {
+	return MMIO32(pin->gpio_w);
+}

firmware/common/pin_lpc.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * 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.
+ */
+
+#ifndef __PIN_LPC_H__
+#define __PIN_LPC_H__
+
+#include <stdint.h>
+
+#include "pin.h"
+
+struct pin_t {
+	uint32_t gpio;
+	uint32_t mask;
+	uint32_t gpio_w;
+};
+
+#define PIN_LPC(_port_num, _pin_num) { \
+	.gpio = (GPIO0) + (_port_num) * 4, \
+	.mask = (1UL << (_pin_num)), \
+	.gpio_w = GPIO_PORT_BASE + 0x1000 + ((_port_num) * 0x80) + ((_pin_num) * 4), \
+};
+
+#endif/*__PIN_LPC_H__*/

firmware/hackrf-common.cmake

@@ -146,6 +146,7 @@ macro(DeclareTargets)
 		${PATH_HACKRF_FIRMWARE_COMMON}/w25q80bv_target.c
 		${PATH_HACKRF_FIRMWARE_COMMON}/spi_bus.c
 		${PATH_HACKRF_FIRMWARE_COMMON}/spi_ssp.c
+		${PATH_HACKRF_FIRMWARE_COMMON}/pin_lpc.c
 		m0_bin.s
 	)