Finally, FM radio support on the FM Recorder

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3640 a1c6a512-1295-4272-9138-f99709370657

6 files changed, 383 insertions, 0 deletions

diff --git a/apps/main_menu.c b/apps/main_menu.c
index 9f4aa8f812..b455e074a2 100644
--- a/apps/main_menu.c
+++ b/apps/main_menu.c
@@ -41,6 +41,9 @@
 #include "fat.h"
 #include "sleeptimer.h"
 #include "wps.h"
+#ifdef HAVE_FMRADIO
+#include "radio.h"
+#endif
 
 #include "lang.h"
 
@@ -258,6 +261,9 @@ bool main_menu(void)
     struct menu_items items[] = {
         { str(LANG_SOUND_SETTINGS),     sound_menu        },
         { str(LANG_GENERAL_SETTINGS),   settings_menu     },
+#ifdef HAVE_FMRADIO
+        { "FM Radio",   radio_screen     },
+#endif
 #ifdef HAVE_MAS3587F
         { str(LANG_RECORDING),          recording_screen  },
         { str(LANG_RECORDING_SETTINGS), recording_menu    },
diff --git a/apps/recorder/radio.c b/apps/recorder/radio.c
new file mode 100644
index 0000000000..7206fe08f3
--- /dev/null
+++ b/apps/recorder/radio.c
@@ -0,0 +1,189 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2003 Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include <stdio.h>
+#include <stdbool.h>
+#include "lcd.h"
+#include "mas.h"
+#include "settings.h"
+#include "button.h"
+#include "fmradio.h"
+#include "status.h"
+#include "kernel.h"
+#include "mpeg.h"
+
+#ifdef HAVE_FMRADIO
+
+#define MAX_FREQ (110000000)
+#define MIN_FREQ (80000000)
+#define FREQ_STEP 100000
+
+static int curr_freq = 99400000;
+static int pll_cnt;
+
+void fm_set_frequency(int freq)
+{
+    /* We add the standard Intermediate Frequency 10.7MHz before calculating
+    ** the divisor
+    ** The reference frequency is set to 50kHz, and the VCO output is prescaled
+    ** by 2.
+    */
+    
+    pll_cnt = (freq + 10700000) / 50000 / 2;
+
+    /* 0x100000 == FM mode
+    ** 0x000002 == Microprocessor controlled Mute
+    */
+    fmradio_set(1, 0x100002 | pll_cnt << 3);
+}
+
+bool radio_screen(void)
+{
+    char buf[128];
+    bool done = false;
+    int button;
+    int val;
+    int freq;
+    int i_freq;
+    bool lock;
+    bool stereo;
+    int search_dir = 0;
+    
+    lcd_clear_display();
+    lcd_setmargins(0, 8);
+    status_draw(false);
+
+    /* Enable the Left and right A/D Converter */
+    mas_codec_writereg(0x0, 0xccc7);
+
+    mas_codec_writereg(6, 0x4000);
+
+    fmradio_set(2, 0x108884); /* 50kHz, 7.2MHz crystal */
+    fm_set_frequency(curr_freq);
+    
+    while(!done)
+    {
+        if(search_dir)
+        {
+            curr_freq += search_dir * FREQ_STEP;
+            if(curr_freq < MIN_FREQ)
+                curr_freq = MAX_FREQ;
+            if(curr_freq > MAX_FREQ)
+                curr_freq = MIN_FREQ;
+
+            /* Tune in and delay */
+            fm_set_frequency(curr_freq);
+            sleep(10);
+            
+            /* Start IF measurement */
+            fmradio_set(1, 0x100006 | pll_cnt << 3);
+            sleep(10);
+
+            /* Now check how close to the IF frequency we are */
+            val = fmradio_read(3);
+            i_freq = (val & 0x7ffff) / 80;
+            lcd_puts(0, 5, "Debug data:");
+            snprintf(buf, 128, "IF: %d.%dMHz",
+                     i_freq / 100, (i_freq % 100) / 10);
+            lcd_puts(0, 6, buf);
+
+            /* Stop searching if the IF frequency is close to 10.7MHz */
+            if(i_freq > 1065 && i_freq < 1075)
+                search_dir = 0;
+        }
+
+        freq = curr_freq / 100000;
+        snprintf(buf, 128, "Freq: %d.%dMHz", freq / 10, freq % 10);
+        lcd_puts(0, 1, buf);
+        
+        val = fmradio_read(3);
+        stereo = (val & 0x100000)?true:false;
+        lock = (val & 0x80000)?true:false;
+        snprintf(buf, 128, "Mode: %s", stereo?"Stereo":"Mono");
+        lcd_puts(0, 2, buf);
+        
+        lcd_update();
+
+        if(search_dir)
+            button = button_get(false);
+        else
+            button = button_get_w_tmo(HZ/2);
+        switch(button)
+        {
+            case BUTTON_OFF | BUTTON_REL:
+                done = true;
+                break;
+                
+            case BUTTON_LEFT:
+                curr_freq -= 100000;
+                if(curr_freq < MIN_FREQ)
+                    curr_freq = MIN_FREQ;
+
+                fm_set_frequency(curr_freq);
+                search_dir = 0;
+                break;
+
+            case BUTTON_RIGHT:
+                curr_freq += 100000;
+                if(curr_freq > MAX_FREQ)
+                    curr_freq = MAX_FREQ;
+                
+                fm_set_frequency(curr_freq);
+                search_dir = 0;
+                break;
+
+            case BUTTON_LEFT | BUTTON_REPEAT:
+                search_dir = -1;
+                break;
+                
+            case BUTTON_RIGHT | BUTTON_REPEAT:
+                search_dir = 1;
+                break;
+
+            case BUTTON_UP:
+            case BUTTON_UP | BUTTON_REPEAT:
+            case BUTTON_RC_VOL_UP:
+                global_settings.volume++;
+                if(global_settings.volume > mpeg_sound_max(SOUND_VOLUME))
+                    global_settings.volume = mpeg_sound_max(SOUND_VOLUME);
+                mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
+                status_draw(false);
+                settings_save();
+                break;
+
+            case BUTTON_DOWN:
+            case BUTTON_DOWN | BUTTON_REPEAT:
+            case BUTTON_RC_VOL_DOWN:
+                global_settings.volume--;
+                if(global_settings.volume < mpeg_sound_min(SOUND_VOLUME))
+                    global_settings.volume = mpeg_sound_min(SOUND_VOLUME);
+                mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
+                status_draw(false);
+                settings_save();
+                break;
+
+            case BUTTON_NONE:
+                status_draw(true);
+                break;
+        }
+    }
+    return false;
+}
+#endif
diff --git a/apps/recorder/radio.h b/apps/recorder/radio.h
new file mode 100644
index 0000000000..dafa46d90d
--- /dev/null
+++ b/apps/recorder/radio.h
@@ -0,0 +1,26 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2003 Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef RADIO_H
+#define RADIO_H
+
+#ifdef HAVE_FMRADIO
+bool radio_screen(void);
+#endif
+
+#endif
diff --git a/firmware/drivers/fmradio.c b/firmware/drivers/fmradio.c
new file mode 100644
index 0000000000..0d947f4480
--- /dev/null
+++ b/firmware/drivers/fmradio.c
@@ -0,0 +1,133 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "lcd.h"
+#include "sh7034.h"
+#include "kernel.h"
+#include "thread.h"
+#include "debug.h"
+
+#ifdef HAVE_FMRADIO
+
+/* Signals:
+   DI (Data In)     - PB0 (doubles as data pin for the LCD)
+   CL (Clock)       - PB1 (doubles as clock for the LCD)
+   CE (Chip Enable) - PB3 (also chip select for the LCD, but active low)
+   DO (Data Out)    - PB4
+*/
+
+#define PB0  0x0001
+#define PB1  0x0002
+#define PB3  0x0008
+#define PB4  0x0010
+
+/* cute little functions */
+#define CE_LO  (PBDR &= ~PB3)
+#define CE_HI  (PBDR |= PB3)
+#define CL_LO  (PBDR &= ~PB1)
+#define CL_HI  (PBDR |= PB1)
+#define DO     (PBDR & PB4)
+#define DI_LO  (PBDR &= ~PB0)
+#define DI_HI  (PBDR |= PB0)
+
+#define START (PBDR |= (PB3 | PB1))
+
+/* delay loop */
+#define DELAY   do { int _x; for(_x=0;_x<10;_x++);} while (0)
+
+static struct mutex fmradio_mtx;
+
+void fmradio_begin(void)
+{
+    mutex_lock(&fmradio_mtx);
+}
+
+void fmradio_end(void)
+{
+    mutex_unlock(&fmradio_mtx);
+}
+
+int fmradio_read(int addr)
+{
+    int i;
+    int data = 0;
+
+    START;
+    
+    /* First address bit */
+    CL_LO;
+    if(addr & 2)
+        DI_HI;
+    else
+        DI_LO;
+    DELAY;
+    CL_HI;
+    DELAY;
+
+    /* Second address bit */
+    CL_LO;
+    if(addr & 1)
+        DI_HI;
+    else
+        DI_LO;
+    DELAY;
+    CL_HI;
+    DELAY;
+
+    for(i = 0; i < 21;i++)
+    {
+        CL_LO;
+        DELAY;
+        data <<= 1;
+        data |= (DO)?1:0;
+        CL_HI;
+        DELAY;
+    }
+
+    CE_LO;
+    
+    return data;
+}
+
+void fmradio_set(int addr, int data)
+{
+    int i;
+    
+    /* Include the address in the data */
+    data |= addr << 21;
+
+    START;
+
+    for(i = 0; i < 23;i++)
+    {
+        CL_LO;
+        DELAY;
+        if(data & (1 << 22))
+            DI_HI;
+        else
+            DI_LO;
+
+        data <<= 1;
+        CL_HI;
+        DELAY;
+    }
+
+    CE_LO;
+}
+
+#endif
diff --git a/firmware/export/config-fmrecorder.h b/firmware/export/config-fmrecorder.h
index 36b304c46d..63a6ece95b 100644
--- a/firmware/export/config-fmrecorder.h
+++ b/firmware/export/config-fmrecorder.h
@@ -39,3 +39,7 @@
 
 /* FM recorders can wake up from RTC alarm */
 #define HAVE_ALARM_MOD 1
+
+/* Define this if you have an FM Radio */
+#define HAVE_FMRADIO 1
+
diff --git a/firmware/export/fmradio.h b/firmware/export/fmradio.h
new file mode 100644
index 0000000000..2877501361
--- /dev/null
+++ b/firmware/export/fmradio.h
@@ -0,0 +1,25 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef FMRADIO_H
+#define FMRADIO_H
+
+extern int fmradio_read(int addr);
+extern void fmradio_set(int addr, int data);
+
+#endif