Iriver: First attempt at recording. Use Info->Debug->PCM recording to test recording of wav-files. Seams to work fine except occasional 100 ms noise at pos 100 ms (not later) so initialization or synch problem..

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6763 a1c6a512-1295-4272-9138-f99709370657

9 files changed, 952 insertions, 2 deletions

diff --git a/apps/SOURCES b/apps/SOURCES
index d6ea2c9491..fb8acd75c6 100644
--- a/apps/SOURCES
+++ b/apps/SOURCES
@@ -51,4 +51,7 @@ recorder/recording.c
 #ifdef IRIVER_H100
 playback.c
 metadata.c
+#ifndef SIMULATOR
+pcm_recording.c
+#endif
 #endif
diff --git a/apps/debug_menu.c b/apps/debug_menu.c
index 71f730d2c5..7203eb820a 100644
--- a/apps/debug_menu.c
+++ b/apps/debug_menu.c
@@ -58,6 +58,9 @@
 #include "ata_mmc.h"
 #endif
 #include "logfdisp.h"
+#if defined(IRIVER_H100) && !defined(SIMULATOR)
+extern bool pcm_rec_screen(void);
+#endif
 
 /*---------------------------------------------------*/
 /*    SPECIAL DEBUG STUFF                            */
@@ -1800,6 +1803,9 @@ bool debug_menu(void)
 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
         { "CPU frequency", dbg_cpufreq },
 #endif
+#if defined(IRIVER_H100) && !defined(SIMULATOR)
+        { "PCM recording", pcm_rec_screen },
+#endif
 #if CONFIG_CPU == SH7034
 #ifdef HAVE_LCD_BITMAP
 #ifdef HAVE_RTC
diff --git a/apps/main.c b/apps/main.c
index 5a47e720e0..38851a5c7d 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -63,6 +63,9 @@
 #if (CONFIG_HWCODEC == MASNONE)
 #include "pcm_playback.h"
 #endif
+#if defined(IRIVER_H100) && !defined(SIMULATOR)
+#include "pcm_record.h"
+#endif
 
 #ifdef CONFIG_TUNER
 #include "radio.h"
@@ -293,6 +296,9 @@ void init(void)
 #if (CONFIG_HWCODEC == MASNONE)
     pcm_init();
 #endif
+#if defined(IRIVER_H100) && !defined(SIMULATOR)
+    pcm_init_recording();
+#endif
 #ifdef HAVE_CHARGING
     car_adapter_mode_init();
 #endif
diff --git a/apps/pcm_recording.c b/apps/pcm_recording.c
new file mode 100644
index 0000000000..dbaf4e0c2a
--- /dev/null
+++ b/apps/pcm_recording.c
@@ -0,0 +1,226 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 "config.h"
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "system.h"
+#include "lcd.h"
+#include "led.h"
+#include "audio.h"
+#include "button.h"
+#include "kernel.h"
+#include "settings.h"
+#include "lang.h"
+#include "font.h"
+#include "icons.h"
+#include "screens.h"
+#include "status.h"
+#include "menu.h"
+#include "sound_menu.h"
+#include "timefuncs.h"
+#include "debug.h"
+#include "misc.h"
+#include "tree.h"
+#include "string.h"
+#include "dir.h"
+#include "errno.h"
+#include "atoi.h"
+#include "sound.h"
+#include "ata.h"
+#include "logf.h"
+#include "uda1380.h"
+#include "pcm_record.h"
+
+
+bool pcm_rec_screen(void)
+{
+    char buf[80];
+    char filename[MAX_PATH];
+    char *rec_sources[2] = {"Line-in","Mic"};
+    int line=0;
+    int play_vol;
+    int rec_monitor, rec_gain, rec_vol, rec_source, rec_count, rec_waveform;   
+    int rec_time;
+    int done, button;
+    int w, h;
+    
+    lcd_setfont(FONT_SYSFIXED);
+    lcd_getstringsize("M", &w, &h);
+    lcd_setmargins(global_settings.invert_cursor ? 0 : w, 8);
+ 
+    play_vol = 120;    
+
+    //cpu_boost(true);
+
+    uda1380_enable_output(true);
+    uda1380_setvol(play_vol, play_vol);
+      
+    rec_monitor = 0;     // No record feedback
+    rec_source  = 1;     // Mic
+    rec_gain    = 0;     // 0-15
+    rec_vol     = 0;     // 0-255
+    rec_count   = 0;
+    rec_waveform = 0;
+    
+    pcm_open_recording();
+    pcm_set_recording_options(rec_source, rec_waveform);
+    pcm_set_recording_gain(rec_gain, rec_vol);
+    
+    //rec_create_directory();
+    
+    done = 0;
+    while(!done)
+    {
+        line = 0;
+        
+        snprintf(buf, sizeof(buf), "PlayVolume: %3d", play_vol);
+        lcd_puts(0,line++, buf);    
+        snprintf(buf, sizeof(buf), "Gain   : %2d  Volume  : %2d", rec_gain, rec_vol);
+        lcd_puts(0,line++, buf);    
+        snprintf(buf, sizeof(buf), "Monitor: %2d  Waveform: %2d", rec_monitor, rec_waveform);
+        lcd_puts(0,line++, buf);    
+
+        line++;
+
+        rec_time = pcm_recorded_time();
+
+        snprintf(buf, sizeof(buf), "Status: %s", pcm_status() & AUDIO_STATUS_RECORD ? "RUNNING" : "STOPPED");
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "Source: %s", rec_sources[rec_source]);
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "File  : %s", filename);
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "Time  : %02d:%02d.%02d", rec_time/HZ/60, (rec_time/HZ)%60, rec_time%HZ);
+        lcd_puts(0,line++, buf);        
+        
+        line++;
+        
+        snprintf(buf, sizeof(buf), "MODE    : Select source");
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "UP/DOWN : Record volume");
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "LFT/RGHT: Record gain");
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "RMT MENU: Toggle monitor");
+        lcd_puts(0,line++, buf);
+        snprintf(buf, sizeof(buf), "RMT PLAY: Toggle waveform");
+        lcd_puts(0,line++, buf);
+
+        
+        lcd_update();
+        
+        
+        button = button_get_w_tmo(HZ/8);
+        switch (button)
+        {
+            case BUTTON_OFF:
+                done = true;
+                break;
+
+            case BUTTON_REC:
+                if (pcm_status() & AUDIO_STATUS_RECORD)
+                {
+                    pcm_stop_recording();
+                   
+                } else
+                {
+                                snprintf(filename, MAX_PATH, "/record-%0d.wav", rec_count++);
+                                pcm_record(filename);
+                            }
+                break;
+        
+            case BUTTON_ON:
+                break;
+
+            case BUTTON_MODE:
+                rec_source = 1 - rec_source;
+                pcm_set_recording_options(rec_source, rec_waveform);
+                break;
+
+            case BUTTON_RIGHT:
+            case BUTTON_RIGHT | BUTTON_REPEAT:
+                if (rec_gain < 15)
+                    rec_gain++;
+                
+                pcm_set_recording_gain(rec_gain, rec_vol);
+                break;
+
+            case BUTTON_LEFT:
+            case BUTTON_LEFT | BUTTON_REPEAT:
+                if (rec_gain > 0)
+                    rec_gain--;
+                    
+                pcm_set_recording_gain(rec_gain, rec_vol);
+                break;
+            
+            case BUTTON_RC_MENU:
+                rec_monitor = 1 - rec_monitor;
+                uda1380_set_monitor(rec_monitor);
+                break;
+            
+            case BUTTON_RC_ON:
+                rec_waveform = 1 - rec_waveform;
+                pcm_set_recording_options(rec_source, rec_waveform);
+                break;
+            
+            case BUTTON_UP:
+            case BUTTON_UP | BUTTON_REPEAT:
+                if (rec_vol<255) 
+                    rec_vol++;
+                pcm_set_recording_gain(rec_gain, rec_vol);
+                break;
+
+            case BUTTON_DOWN:
+            case BUTTON_DOWN | BUTTON_REPEAT:
+                if (rec_vol)
+                    rec_vol--;
+                pcm_set_recording_gain(rec_gain, rec_vol);
+                break;
+
+            case SYS_USB_CONNECTED:
+                if (pcm_status() & AUDIO_STATUS_RECORD)
+                {
+                    // ignore usb while recording
+                } else
+                {
+                    pcm_stop_recording();
+                    
+                    uda1380_enable_output(false);
+                    
+                    default_event_handler(SYS_USB_CONNECTED);
+                    return false;
+                }
+                break;
+            
+        }
+        
+    }
+ 
+    pcm_stop_recording(); 
+    pcm_close_recording();
+    
+    uda1380_enable_output(false);
+ 
+    return true;   
+}
+    
diff --git a/firmware/SOURCES b/firmware/SOURCES
index dbe84267d2..f0a3501903 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -126,4 +126,7 @@ drivers/uda1380.c
 #if (CONFIG_HWCODEC == MASNONE) && !defined(SIMULATOR)
 pcm_playback.c
 #endif
+#if defined(IRIVER_H100) && !defined(SIMULATOR)
+pcm_record.c
+#endif
 sound.c
diff --git a/firmware/drivers/uda1380.c b/firmware/drivers/uda1380.c
index 23d917f8ae..bba7d19d04 100644
--- a/firmware/drivers/uda1380.c
+++ b/firmware/drivers/uda1380.c
@@ -200,7 +200,7 @@ void uda1380_close(void)
  */
 void uda1380_enable_recording(bool source_mic)
 {
-   uda1380_write_reg(REG_0, uda1380_regs[REG_0] | EN_ADC);
+    uda1380_write_reg(REG_0, uda1380_regs[REG_0] | EN_ADC);
 
     if (source_mic)
     {
@@ -214,6 +214,8 @@ void uda1380_enable_recording(bool source_mic)
         uda1380_write_reg(REG_PGA, (uda1380_regs[REG_PGA] & PGA_GAIN_MASK) | PGA_GAINL(0) | PGA_GAINR(0)); /* PGA_GAIN: 0=0 dB, F=24dB */
     }
 
+    sleep(HZ/8);
+
     uda1380_write_reg(REG_I2S,     uda1380_regs[REG_I2S] | I2S_MODE_MASTER);
     uda1380_write_reg(REG_MIX_CTL, MIX_MODE(3));   /* Not sure which mode is the best one.. */
 
diff --git a/firmware/export/mcf5249.h b/firmware/export/mcf5249.h
index 398b31156d..66e92eeb50 100644
--- a/firmware/export/mcf5249.h
+++ b/firmware/export/mcf5249.h
@@ -159,7 +159,7 @@
 #define PDOR1_R  (*(volatile unsigned long *)(MBAR2 + 0x044))
 #define PDOR2_L  (*(volatile unsigned long *)(MBAR2 + 0x054))
 #define PDOR2_R  (*(volatile unsigned long *)(MBAR2 + 0x064))
-#define PDIR3    (*(volatile unsigned long *)(MBAR2 + 0x074))
+#define PDIR2    (*(volatile unsigned long *)(MBAR2 + 0x074))
 #define PDOR3    (*(volatile unsigned long *)(MBAR2 + 0x074))
 #define UCHANNELTRANSMIT  (*(volatile unsigned long *)(MBAR2 + 0x084))
 #define U1CHANNELRECEIVE  (*(volatile unsigned long *)(MBAR2 + 0x088))
@@ -262,5 +262,8 @@
 /* DMAROUTE config */
 #define DMA0_REQ_AUDIO_1     0x80
 #define DMA0_REQ_AUDIO_2     0x81
+#define DMA1_REQ_AUDIO_1     0x8000
+#define DMA1_REQ_AUDIO_2     0x8100
+
 
 #endif
diff --git a/firmware/export/pcm_record.h b/firmware/export/pcm_record.h
new file mode 100644
index 0000000000..964d3a003e
--- /dev/null
+++ b/firmware/export/pcm_record.h
@@ -0,0 +1,51 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 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.
+ *
+ ****************************************************************************/
+
+/*
+ * Function names are taken from apps/recorder/recording.c to
+ * make the integration later easier..
+ * 
+ */
+
+#ifndef PCM_RECORD_H
+#define PCM_RECORD_H
+
+unsigned long pcm_status(void);
+
+void pcm_init_recording(void);
+
+void pcm_open_recording(void);
+void pcm_close_recording(void);
+
+
+void pcm_set_recording_options(int source, bool enable_waveform);
+void pcm_set_recording_gain(int gain, int volume);
+                                
+void pcm_record(const char *filename);
+void pcm_stop_recording(void);
+
+//void pcm_new_file(const char *filename);
+
+
+unsigned long pcm_recorded_time(void);
+unsigned long pcm_num_recorded_bytes(void);
+void pcm_pause_recording(void);
+void pcm_resume_recording(void);
+
+#endif
diff --git a/firmware/pcm_record.c b/firmware/pcm_record.c
new file mode 100644
index 0000000000..d11458427d
--- /dev/null
+++ b/firmware/pcm_record.c
@@ -0,0 +1,650 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 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 "config.h"
+#include "debug.h"
+#include "panic.h"
+#include "thread.h"
+
+#include <kernel.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "cpu.h"
+#include "i2c.h"
+#include "uda1380.h"
+#include "system.h"
+#include "usb.h"
+
+#include "buffer.h"
+#include "audio.h"
+#include "button.h"
+#include "file.h"
+#include "sprintf.h"
+#include "logf.h"
+#include "button.h"
+#include "lcd.h"
+#include "lcd-remote.h"
+#include "pcm_playback.h"
+#include "pcm_record.h"
+
+
+/***************************************************************************/
+
+static volatile bool is_recording;              /* We are recording */
+static volatile bool is_stopping;               /* Are we going to stop */
+static volatile bool is_paused;                 /* We have paused   */
+
+static volatile int num_rec_bytes;
+static volatile int int_count;                  /* Number of DMA completed interrupts */
+static volatile int error_count;                /* Number of DMA errors */
+
+static unsigned long record_start_time;         /* Value of current_tick when recording was started */
+static unsigned long pause_start_time;          /* Value of current_tick when pause was started */
+
+static int rec_gain, rec_volume;
+static bool show_waveform;                      
+static int init_done = 0;
+static int wav_file;
+static char recording_filename[MAX_PATH];
+
+/***************************************************************************/
+
+/*
+   Some estimates:
+    44100 HZ * 4 = 176400 bytes/s
+    Refresh LCD 10 HZ = 176400 / 10 = 17640 bytes ~=~ 1024*16 bytes
+    
+    If NUM_BUFFERS is 80 we can hold ~8 sec of data in memory
+    ALL_BUFFER_SIZE will be 1024*16 * 80 = 1310720 bytes
+*/
+
+#define NUM_BUFFERS       80        
+#define EACH_BUFFER_SIZE  (1024*16)     /* Multiple of 4. Use small value to get responsive waveform */
+#define ALL_BUFFERS_SIZE  (NUM_BUFFERS * EACH_BUFFER_SIZE)
+
+#define WRITE_THRESHOLD   40            /* Minimum number of buffers before write to file */
+
+static unsigned char *rec_buffers[NUM_BUFFERS];
+
+/* 
+ Overrun occures when DMA needs to write a new buffer and write_index == read_index 
+ Solution to this is to optimize pcmrec_callback, use cpu_boost somewhere or increase 
+ the total buffer size (or WRITE_THRESHOLD)
+*/
+
+static int write_index;       /* Which buffer the DMA is currently recording */
+static int read_index;        /* The oldest buffer that the pcmrec_callback has not read */
+
+/***************************************************************************/
+
+static struct event_queue  pcmrec_queue;
+static long                pcmrec_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
+static const char          pcmrec_thread_name[] = "pcmrec";
+
+static void pcmrec_thread(void);
+
+/* Event IDs */
+#define PCMREC_OPEN         1     /* Enable recording */
+#define PCMREC_CLOSE        2     /* Disable recording */
+#define PCMREC_START        3     /* Start a new recording */
+#define PCMREC_STOP         4     /* Stop the current recording */
+#define PCMREC_PAUSE        10
+#define PCMREC_RESUME       11
+#define PCMREC_NEW_FILE     12
+#define PCMREC_SET_GAIN     13
+#define PCMREC_GOT_DATA     20    /* DMA1 notifies when data has arrived */
+
+
+/*******************************************************************/
+/* Functions that are not executing in the pcmrec_thread first     */
+/*******************************************************************/
+
+void pcm_init_recording(void)
+{
+    int_count = 0;
+    error_count = 0;
+
+    show_waveform = 0;
+    is_recording = 0;
+    is_stopping = 0;
+    num_rec_bytes = 0;
+    wav_file = -1;  
+    read_index = 0;
+    write_index = 0;
+    
+    queue_init(&pcmrec_queue);
+    create_thread(pcmrec_thread, pcmrec_stack, sizeof(pcmrec_stack), pcmrec_thread_name);
+}
+
+void pcm_open_recording(void)
+{
+    init_done = 0;
+    
+    logf("pcm_open_rec");
+    
+    queue_post(&pcmrec_queue, PCMREC_OPEN, 0);
+    
+    while (init_done)
+    {
+        sleep(HZ >> 8);
+    }
+        
+    logf("pcm_open_rec done");
+}
+
+void pcm_close_recording(void)
+{
+    /* todo: synchronize completion with pcmrec thread */
+    queue_post(&pcmrec_queue, PCMREC_CLOSE, 0);
+}
+
+
+
+unsigned long pcm_status(void)
+{
+    unsigned long ret = 0;
+    
+    if (is_recording)
+        ret |= AUDIO_STATUS_RECORD;
+        
+    return ret;
+}
+
+
+
+void pcm_new_file(const char *filename)
+{
+    /* todo */
+    filename = filename;
+
+}
+
+unsigned long pcm_recorded_time(void)
+{
+    if (is_recording)
+    {
+        if(is_paused)
+            return pause_start_time - record_start_time;
+        else
+            return current_tick - record_start_time;
+    }
+
+    return 0;
+}
+
+unsigned long pcm_num_recorded_bytes(void)
+{
+   
+    if (is_recording)
+    {
+        return num_rec_bytes;
+    }
+    else
+        return 0;
+}
+
+void pcm_pause_recording(void)
+{
+    /* todo */
+}
+
+void pcm_resume_recording(void)
+{
+    /* todo */
+}
+
+
+/**
+ * Sets the audio source 
+ * 
+ * Side effect: This functions starts feeding the CPU with audio data over the I2S bus
+ *
+ * @param source 0=line-in, 1=mic 
+ */
+void pcm_set_recording_options(int source, bool enable_waveform)
+{
+    uda1380_enable_recording(source);
+    
+    show_waveform = enable_waveform;
+    
+}
+
+
+/**
+ *
+ * @param gain   line-in and microphone gain (0-15)
+ * @param volume ADC volume (0-255)
+ */
+void pcm_set_recording_gain(int gain, int volume)
+{
+    rec_gain = gain;
+    rec_volume = volume;
+    
+    queue_post(&pcmrec_queue, PCMREC_SET_GAIN, 0);
+    
+}
+         
+/**
+ * Start recording
+ * 
+ * Use pcm_set_recording_options before calling record
+ */                               
+void pcm_record(const char *filename)
+{
+    strncpy(recording_filename, filename, MAX_PATH - 1);
+    recording_filename[MAX_PATH - 1] = 0;
+    
+    queue_post(&pcmrec_queue, PCMREC_START, 0);
+}
+
+/**
+ * 
+ */
+void pcm_stop_recording(void)
+{
+    if (is_recording)
+    is_stopping = 1;
+    
+    queue_post(&pcmrec_queue, PCMREC_STOP, 0);
+
+    logf("pcm_stop_recording");
+    
+    while (is_stopping)
+    {
+        sleep(HZ >> 4);
+    }
+    
+    logf("pcm_stop_recording done");
+    
+    
+}
+
+
+/***************************************************************************/
+/* Functions that executes in the context of pcmrec_thread                 */
+/***************************************************************************/
+
+
+/**
+ * Process the buffers using read_index and write_index.
+ *
+ * DMA1 handler posts to pcmrec_queue so that pcmrec_thread calls this 
+ * function. Also pcmrec_stop will call this function when the recording 
+ * is stopping, and that call will have flush = true.
+ *
+ */
+
+void pcmrec_callback(bool flush) __attribute__ ((section (".icode")));
+void pcmrec_callback(bool flush)
+{
+    int num_ready;
+
+    num_ready = write_index - read_index;
+    if (num_ready < 0)
+        num_ready += NUM_BUFFERS;
+
+    /* we can consume up to num_ready buffers */
+        
+#ifdef HAVE_REMOTE_LCD    
+    /* Draw waveform on remote LCD */
+    if (show_waveform && num_ready>0)          
+    {
+        short *buf; 
+        long x,y,offset;
+        int show_index;
+
+        /* Just display the last buffer (most recent one) */  
+        show_index = read_index + num_ready - 1;          
+        buf = (short*)rec_buffers[show_index]; 
+    
+        lcd_remote_clear_display();    
+        
+        offset = 0;
+        for (x=0; x<LCD_REMOTE_WIDTH-1; x++)
+        {
+            y = buf[offset] * (LCD_REMOTE_HEIGHT / 2)  *5;       /* The 5 is just 'zooming' */
+            y = y >> 15;                /* Divide with SHRT_MAX */
+            y += LCD_REMOTE_HEIGHT/2;
+            
+            if (y < 2) y=2;
+            if (y >= LCD_REMOTE_HEIGHT-2) y = LCD_REMOTE_HEIGHT-2;
+    
+            REMOTE_DRAW_PIXEL(x,y);
+            
+            offset += (EACH_BUFFER_SIZE/2) / LCD_REMOTE_WIDTH;  
+        }
+      
+        lcd_remote_update();   
+    }
+       
+#endif      
+
+    /* Note: This might be a good place to call the 'codec' later */
+
+    /* Check that we have the minimum amount of data to save or */
+    /* that if it's closing time which mean we have to save..   */
+    if (wav_file != -1)
+    {
+        if (num_ready >= WRITE_THRESHOLD || flush)
+        {
+            unsigned long *ptr = (unsigned long*)rec_buffers[read_index];
+            int i;
+            
+            for (i=0; i<EACH_BUFFER_SIZE * num_ready / 4; i++)
+            {
+                *ptr = SWAB32(*ptr);
+                ptr++;
+            }
+            
+            write(wav_file, rec_buffers[read_index], EACH_BUFFER_SIZE * num_ready);
+        
+            read_index+=num_ready;
+            if (read_index >= NUM_BUFFERS)
+                read_index -= NUM_BUFFERS;    
+        }
+        
+    } else
+    {
+        /* In this case we must consume the buffers otherwise we will */
+        /* get 'dma1 overrun' pretty fast */
+        
+        read_index+=num_ready;
+        if (read_index >= NUM_BUFFERS)
+            read_index -= NUM_BUFFERS;
+    }
+}
+
+    
+
+
+void pcmrec_dma_start(void)
+{
+    DAR1 = (unsigned long)rec_buffers[write_index++];  /* Destination address */
+    SAR1 = (unsigned long)&PDIR2;                      /* Source address */
+    BCR1 = EACH_BUFFER_SIZE;                           /* Bytes to transfer */
+                        
+    /* Start the DMA transfer.. */
+    DCR1 = DMA_INT | DMA_EEXT | DMA_CS | DMA_DINC | DMA_START;        
+    
+    logf("dma1 started");
+}
+
+
+/* DMA1 Interrupt is called when the DMA has finished transfering a chunk */
+void DMA1(void) __attribute__ ((interrupt_handler, section(".icode")));
+void DMA1(void)
+{
+    int res = DSR1;
+
+    DSR1 = 1;    /* Clear interrupt */
+    
+    int_count++;
+
+    if (res & 0x70)
+    {
+        DCR1 = 0;   /* Stop DMA transfer */
+        error_count++;
+        is_recording = 0;
+        
+        logf("dma1 err 0x%x", res);
+        
+    } else 
+    {
+        num_rec_bytes += EACH_BUFFER_SIZE;
+        
+        write_index++;
+        if (write_index >= NUM_BUFFERS)
+            write_index = 0;
+        
+        if (is_stopping || !is_recording)
+        {
+            DCR1 = 0;   /* Stop DMA transfer */
+            is_recording = 0;
+            
+            logf("dma1 stopping");
+            
+        } else if (write_index == read_index)
+        {
+            DCR1 = 0;   /* Stop DMA transfer */
+            is_recording = 0;
+            
+            logf("dma1 overrun");
+            
+        } else
+        {
+            DAR1 = (unsigned long)rec_buffers[write_index];  /* Destination address */
+            BCR1 = EACH_BUFFER_SIZE;
+
+            queue_post(&pcmrec_queue, PCMREC_GOT_DATA, NULL);
+            
+        }
+    }
+    
+    IPR |= (1<<15); /* Clear pending interrupt request */
+}
+
+static int start_wave(void)
+{
+    unsigned char header[44] = 
+    {
+        'R','I','F','F',0,0,0,0,'W','A','V','E','f','m','t',' ',
+        0x10,0,0,0,1,0,2,0,0x44,0xac,0,0,0x10,0xb1,2,0,
+        4,0,0x10,0,'d','a','t','a',0,0,0,0
+    };
+    
+    wav_file = open(recording_filename, O_RDWR|O_CREAT|O_TRUNC);
+    if (wav_file < 0)
+    {
+        wav_file = -1;
+        logf("create failed: %d", wav_file);
+        return -1;
+    }
+    
+    if (sizeof(header) != write(wav_file, header, sizeof(header)))
+    {
+        close(wav_file);
+        wav_file = -1;
+        logf("write failed");
+        return -2;
+    }
+    
+    return 0;
+}
+
+/* Update header and set correct length values */
+static void close_wave(void)
+{
+    long l;
+    
+    l = SWAB32(num_rec_bytes + 36);
+    lseek(wav_file, 4, SEEK_SET);
+    write(wav_file, &l, 4);
+        
+    l = SWAB32(num_rec_bytes);
+    lseek(wav_file, 40, SEEK_SET);
+    write(wav_file, &l, 4);
+    
+    close(wav_file);
+    wav_file = -1;
+}
+
+static void pcmrec_start(void)
+{
+    logf("pcmrec_start");
+    
+    if (is_recording) 
+        return; 
+        
+    if (wav_file != -1)
+        close(wav_file);
+        
+    logf("rec: %s", recording_filename);
+    
+    start_wave(); /* todo: send signal to pcm_record if we have failed */
+
+    num_rec_bytes = 0;
+    
+    /* Store the current time */
+    record_start_time = current_tick;
+
+    write_index = 0;
+    read_index = 0;
+
+    is_stopping = 0;
+    is_paused = 0;
+    is_recording = 1;
+
+    pcmrec_dma_start();
+    
+}
+
+static void pcmrec_stop(void)
+{
+    /* wait for recording to finish */
+    
+    /* todo: Abort current DMA transfer using DCR1.. */
+    
+    logf("pcmrec_stop");
+    
+    while (is_recording)
+    {
+        sleep(HZ >> 4);
+    }
+    
+    logf("pcmrec_stop done");
+
+    /* Write unfinished buffers to file */
+    pcmrec_callback(true);        
+
+    close_wave();
+    
+    is_stopping = 0;   
+}
+
+static void pcmrec_open(void)
+{
+    unsigned long buffer_start;
+    int i;
+    
+    show_waveform = 0;
+    is_recording = 0;
+    is_stopping = 0;
+    num_rec_bytes = 0;
+    wav_file = -1;  
+    read_index = 0;
+    write_index = 0;
+
+    buffer_start = (unsigned long)(&audiobuf[(audiobufend - audiobuf) - (ALL_BUFFERS_SIZE + 16)]);
+    buffer_start &= ~3;
+    
+    for (i=0; i<NUM_BUFFERS; i++)
+    {
+        rec_buffers[i] = (unsigned char*)(buffer_start + EACH_BUFFER_SIZE * i);
+    }
+
+    IIS1CONFIG = 0x800;             /* Stop any playback                              */
+    AUDIOGLOB |= 0x180;             /* IIS1 fifo auto sync = on, PDIR2 auto sync = on */
+    DATAINCONTROL = 0xc000;         /* Generate Interrupt when 6 samples in fifo      */
+    DATAINCONTROL |= 0x20;          /* PDIR2 source = IIS1recv                        */
+
+    DIVR1 = 55;                     /* DMA1 is mapped into vector 55 in system.c      */
+    DMACONFIG = 1;                  /* DMA0Req = PDOR3, DMA1Req = PDIR2               */
+    DMAROUTE = (DMAROUTE & 0xffff00ff) | DMA1_REQ_AUDIO_2;
+    ICR4 = (ICR4 & 0xffffff00) | 0x0000001c;  /* Enable interrupt at level 7, priority 0 */
+    IMR &= ~(1<<15);                /* bit 15 is DMA1 */
+
+    init_done = 1;    
+}
+
+static void pcmrec_close(void)
+{
+    uda1380_disable_recording();
+
+    DMAROUTE = (DMAROUTE & 0xffff00ff);
+    ICR4 = (ICR4 & 0xffffff00);     /* Disable interrupt */
+    IMR |= (1<<15);                 /* bit 15 is DMA1 */        
+
+}
+
+static void pcmrec_thread(void)
+{
+    struct event ev;
+    
+    logf("thread pcmrec start");
+    
+    while (1)
+    {
+        queue_wait(&pcmrec_queue, &ev);
+        
+        switch (ev.id)
+        {
+            case PCMREC_OPEN:
+                pcmrec_open();
+                break;
+                
+            case PCMREC_CLOSE:
+                pcmrec_close();
+                break;    
+            
+            case PCMREC_START:
+                pcmrec_start();
+                break;
+            
+            case PCMREC_STOP:
+                pcmrec_stop();
+                break;
+            
+            case PCMREC_PAUSE:
+                /* todo */
+                break;
+            
+            case PCMREC_RESUME:
+                /* todo */
+                break;
+            
+            case PCMREC_NEW_FILE:
+                /* todo */
+                break;
+            
+            case PCMREC_SET_GAIN:
+                uda1380_set_recvol(rec_gain, rec_gain, rec_volume);
+                break;
+
+            case PCMREC_GOT_DATA:
+                pcmrec_callback(false);
+                break;
+
+            case SYS_USB_CONNECTED:
+                if (!is_recording && !is_stopping)
+                {
+                    usb_acknowledge(SYS_USB_CONNECTED_ACK);
+                    usb_wait_for_disconnect(&pcmrec_queue);                    
+                }
+                
+                break;
+        }
+    }
+    
+    logf("thread pcmrec done");
+}
+
+