Updated HackRF firmware

SoftwareDefined/HackRF/hackrf-2021.03.1/firmware/common/i2c_lpc.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2012 Michael Ossmann <mike@ossmann.com>
+ * Copyright 2012 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 "i2c_lpc.h"
+
+#include <libopencm3/lpc43xx/i2c.h>
+
+/* FIXME return i2c0 status from each function */
+
+void i2c_lpc_start(i2c_bus_t* const bus, const void* const _config) {
+	const i2c_lpc_config_t* const config = _config;
+
+	const uint32_t port = (uint32_t)bus->obj;
+	i2c_init(port, config->duty_cycle_count);
+}
+
+void i2c_lpc_stop(i2c_bus_t* const bus) {
+	const uint32_t port = (uint32_t)bus->obj;
+	i2c_disable(port);
+}
+
+void i2c_lpc_transfer(i2c_bus_t* const bus,
+	const uint_fast8_t peripheral_address,
+	const uint8_t* const data_tx, const size_t count_tx,
+	uint8_t* const data_rx, const size_t count_rx
+) {
+	const uint32_t port = (uint32_t)bus->obj;
+	size_t i;
+	bool ack = false;
+	if (data_tx && (count_tx > 0)) {
+		i2c_tx_start(port);
+		i2c_tx_byte(port, (peripheral_address << 1) | I2C_WRITE);
+		for(i=0; i<count_tx; i++) {
+			i2c_tx_byte(port, data_tx[i]);
+		}
+	}
+
+	if (data_rx && (count_rx > 0)) {
+		i2c_tx_start(port);
+		i2c_tx_byte(port, (peripheral_address << 1) | I2C_READ);
+		for(i=0; i<count_rx; i++) {
+			/* ACK each byte except the last */
+			ack = (i!=count_rx-1);
+			data_rx[i] = i2c_rx_byte(port, ack);
+		}
+	}
+
+	i2c_stop(port);
+}
+
+bool i2c_probe(i2c_bus_t* const bus, const uint_fast8_t device_address) {
+	const uint32_t port = (uint32_t)bus->obj;
+
+	i2c_tx_start(port);
+	i2c_tx_byte(port, (device_address << 1) | I2C_WRITE);
+	const bool detected = (I2C_STAT(port) == 0x18);
+	i2c_stop(port);
+
+	return detected;
+}