Add initial emulator implementation

meson.build

@@ -106,7 +106,8 @@ stm32f405_def = {'STM32F40_41xxx': '', 'HSE_VALUE':'8000000'}
 ##
 
 ## Linux
-linux_src = src + ['platform/drivers/display/display_libSDL.c',
+linux_src = src + ['platform/targets/linux/emulator/emulator.c',
+                   'platform/drivers/display/display_libSDL.c',
                    'platform/drivers/keyboard/keyboard_linux.c',
                    'platform/mcu/x86_64/drivers/gpio.c',
                    'platform/mcu/x86_64/drivers/delays.c',
@@ -121,7 +122,8 @@ linux_def = def + {'SCREEN_WIDTH': '160', 'SCREEN_HEIGHT': '128', 'PIX_FMT_RGB56
 
 linux_inc = inc + ['rtos/uC-OS3/Ports/POSIX',
                    'rtos/uC-CPU/Posix',
-                   'platform/targets/linux']
+                   'platform/targets/linux',
+                   'platform/targets/linux/emulator']
 
 if not meson.is_cross_build()
   sdl_dep = dependency('SDL2')
@@ -171,7 +173,7 @@ mduv380_def = def + stm32f405_def
 ## Compilation defines
 ##
 linux_c_args = []
-linux_l_args = ['--entry=systemBootstrap']
+linux_l_args = ['--entry=entry']
 
 # Add AddressSanitizer if required
 if get_option('asan')

platform/targets/linux/emulator/emulator.c

@@ -0,0 +1,152 @@
+/***************************************************************************
+ *   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 "emulator.h"
+#include <pthread.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void systemBootstrap();
+
+int CLIMenu() {
+    int choice = 0;
+    printf("Select the value to change:\n");
+    printf("1 -> RSSI\n");
+    printf("2 -> Vbat\n");
+    printf("3 -> Mic Level\n");
+    printf("4 -> Volume Level\n");
+    printf("5 -> Channel selector\n");
+    printf("6 -> Toggle PTT\n");
+    printf("7 -> Print current state\n");
+    printf("8 -> Exit\n");
+    printf("> ");
+    do {
+        scanf("%d", &choice);
+    } while (choice < 1 || choice > 7);
+    printf("\e[1;1H\e[2J");
+    return choice;
+}
+
+void *updateValue(float *curr_value) {
+    printf("Current value: %f\n", *curr_value);
+    printf("New value: \n");
+    scanf("%f", curr_value);
+}
+
+void *printState() {
+    printf("\nCurrent state\n");
+    printf("RSSI   : %f\n", Radio_State.RSSI);
+    printf("Battery: %f\n", Radio_State.Vbat);
+    printf("Mic    : %f\n", Radio_State.micLevel);
+    printf("Volume : %f\n", Radio_State.volumeLevel);
+    printf("Channel: %f\n", Radio_State.chSelector);
+    printf("PTT    : %s\n\n", Radio_State.PttStatus ? "true" : "false");
+
+}
+
+void *startRadio() {
+    systemBootstrap();
+}
+//void *startGUI();
+
+void *startCLIMenu() {
+    int choice;
+    do {
+        choice = CLIMenu();
+        switch (choice) {
+            case VAL_RSSI:
+                updateValue(&Radio_State.RSSI);
+                break;
+            case VAL_BAT:
+                updateValue(&Radio_State.Vbat);
+                break;
+            case VAL_MIC:
+                updateValue(&Radio_State.micLevel);
+                break;
+            case VAL_VOL:
+                updateValue(&Radio_State.volumeLevel);
+                break;
+            case VAL_CH:
+                updateValue(&Radio_State.chSelector);
+                break;
+            case VAL_PTT:
+                Radio_State.PttStatus = Radio_State.PttStatus ? false : true;
+                break;
+            case PRINT_STATE:
+                printState();
+                break;
+            default:
+                continue;
+        }
+    } while (choice != EXIT);
+    printf("exiting\n");
+    SDL_Quit();
+    SDL_DestroyWindow(window);
+    exit(0);
+};
+
+
+int emulator_main() {
+    Radio_State = (radio_state){12, 7, 3, 4, 1, false};
+
+    pthread_t gui_thread, cli_thread, radio_thread;
+    int err1, err2;
+
+    err1 = pthread_create(&cli_thread, NULL, startCLIMenu, NULL);
+    //err2 = pthread_create(&gui_thread, NULL, startGUI, NULL);
+
+    if (err1) {
+        printf("An error occurred starting the threads: %d, %d\n", err1, err2);
+        return 1;
+    }
+    //pthread_join(gui_thread, NULL);
+    pthread_create(&radio_thread, NULL, startRadio, NULL);
+    pthread_join(cli_thread, NULL);
+
+
+    printf("73\n");
+    return 0;
+}
+
+
+void *entry() {
+    __asm__(
+    "xorl %ebp, %ebp\n\t"
+    "mov %RDX, %R9\n\t"
+
+    #ifdef __ILP32__
+    "mov (%rsp), %esi\n\t"
+    "add $4, %esp\n\t"
+    #else
+    "popq %rsi\n\t"
+    #endif
+    "mov %RSP, %RDX\n\t"
+    "and  $~15, %RSP\n\t"
+    "pushq %rax\n\t"
+    "pushq %rsp\n\t"
+    "mov __libc_csu_fini@GOTPCREL(%rip), %R8\n\t"
+    "mov __libc_csu_init@GOTPCREL(%rip), %RCX\n\t"
+    "mov emulator_main@GOTPCREL(%rip), %RDI\n\t"
+    "call *__libc_start_main@GOTPCREL(%rip)\n\t"
+    "hlt\n\t");
+}
+

platform/targets/linux/emulator/emulator.h

@@ -0,0 +1,59 @@
+/***************************************************************************
+ *   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 <stdbool.h>
+#include <stdint.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+#ifndef SCREEN_WIDTH
+#define SCREEN_WIDTH 160
+#endif
+
+#ifndef SCREEN_HEIGHT
+#define SCREEN_HEIGHT 128
+#endif
+
+
+SDL_Renderer *renderer;      /* SDL renderer           */
+SDL_Window *window;          /* SDL window             */
+SDL_Texture *displayTexture; /* SDL rendering surface  */
+
+enum choices {
+    VAL_RSSI=1,
+    VAL_BAT,
+    VAL_MIC,
+    VAL_VOL,
+    VAL_CH,
+    VAL_PTT,
+    PRINT_STATE,
+    EXIT
+};
+
+typedef struct {
+    float RSSI;
+    float Vbat;
+    float micLevel;
+    float volumeLevel;
+    float chSelector;
+    bool PttStatus;
+} radio_state;
+
+radio_state Radio_State;

platform/targets/linux/platform.c

@@ -18,10 +18,11 @@
 #include "platform.h"
 #include "gpio.h"
 #include <stdio.h>
+#include "emulator.h"
 
 void platform_init()
 {
-	printf("Platform init\n");
+	//printf("Platform init\n");
 }
 
 void platform_terminate()
@@ -31,36 +32,32 @@ void platform_terminate()
 
 void platform_setBacklightLevel(uint8_t level)
 {
-	printf("platform_setBacklightLevel(%u)\n", level);
+	//printf("platform_setBacklightLevel(%u)\n", level);
 }
 
 // Simulate a fully charged lithium battery
 float platform_getVbat(){
-	return 7.8;
+	return Radio_State.Vbat;
 }
 
 
 float platform_getMicLevel(){
-	printf("platform_getMicLevel()\n");
-	return 0.69;
+	return Radio_State.micLevel;
 }
 
 
 float platform_getVolumeLevel(){
-	printf("platform_getVolumeLevel()\n");
-	return 0.69;
+	return Radio_State.volumeLevel;
 }
 
 
 uint8_t platform_getChSelector(){
-	printf("platform_getChSelector()\n");
-	return 42;
+	return Radio_State.chSelector;
 }
 
 
 bool platform_getPttStatus(){
-	printf("platform_getVbat()\n");
-	return true;
+    return Radio_State.PttStatus;
 }