New radio driver for linux platform

meson.build

@@ -159,7 +159,7 @@ linux_src = src + ['platform/targets/linux/emulator/emulator.c',
                    'platform/mcu/x86_64/drivers/gpio.c',
                    'platform/mcu/x86_64/drivers/delays.c',
                    'platform/mcu/x86_64/drivers/rtc.c',
-                   'platform/drivers/baseband/rtx_linux.c',
+                   'platform/drivers/baseband/radio_linux.c',
                    'platform/targets/linux/platform.c',
                    'rtos/uC-OS3/Ports/POSIX/os_cpu_c.c',
                    'rtos/uC-CPU/Posix/cpu_c.c']

platform/drivers/baseband/radio_linux.c

@@ -0,0 +1,93 @@
+/***************************************************************************
+ *   Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO,                    *
+ *                         Niccolò Izzo IU2KIN                             *
+ *                         Frederik Saraci IU2NRO                          *
+ *                         Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   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 3 of the License, 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; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <interfaces/radio.h>
+#include <stdio.h>
+
+void radio_init()
+{
+    puts("radio_linux: init() called");
+}
+
+void radio_terminate()
+{
+    puts("radio_linux: terminate() called");
+}
+
+void radio_setBandwidth(const enum bandwidth bw)
+{
+
+    char *band = (bw == BW_12_5) ? "12.5" :
+                 ((bw == BW_20)  ? "20"   : "25");
+
+    printf("radio_linux: setting bandwidth to %skHz\n", band);
+}
+
+void radio_setOpmode(const enum opmode mode)
+{
+    char *mod = (mode == FM) ? "FM" : "DMR";
+    printf("radio_linux: setting opmode to %s", mod);
+}
+
+void radio_setVcoFrequency(const freq_t frequency, const bool isTransmitting)
+{
+    char *txrx = isTransmitting ? "RX" : "RX";
+    printf("radio_linux: setting %s VCO frequency to %d\n", txrx, frequency);
+}
+
+void radio_setCSS(const tone_t rxCss, const tone_t txCss)
+{
+    printf("radio_linux: setting CTCSS: RX to %.1f and TX to %.1f\n",
+           rxCss/10.0f, txCss/10.0f);
+}
+
+bool radio_checkRxDigitalSquelch()
+{
+    puts("radio_linux: radio_checkRxDigitalSquelch(), returning 'true'");
+    return true;
+}
+
+void radio_enableRx()
+{
+    puts("radio_linux: enableRx() called");
+}
+
+void radio_enableTx(const float txPower, const bool enableCss)
+{
+    printf("radio_linux: enabling TX with output power of %.2fW and CTCSS %s\n",
+           txPower, enableCss ? "enabled" : "disabled");
+}
+
+void radio_disableRtx()
+{
+    puts("radio_linux: disableRtx() called");
+}
+
+void radio_updateCalibrationParams(const rtxStatus_t* rtxCfg)
+{
+    (void) rtxCfg;
+    puts("radio_linux: updateCalibrationParams() called");
+}
+
+float radio_getRssi(const freq_t rxFreq)
+{
+    printf("radio_linux: requested RSSI at freq %d, returning -100dBm\n", rxFreq);
+    return -100.0f;
+}