Cleanup of new button reading code. Moved functions for enabling of scanning and the decision to scan or not to button_read_device.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11377 a1c6a512-1295-4272-9138-f99709370657

apps/debug_menu.c

@@ -1072,7 +1072,7 @@ bool dbg_ports(void)
 
 #ifdef IAUDIO_X5
         snprintf(buf, sizeof(buf), "ADC_BUTTONS (%c): %02x",
-            adc_get_button_scan_enabled() ? '+' : '-', adc_buttons);
+            button_scan_enabled() ? '+' : '-', adc_buttons);
         lcd_puts(0, line++, buf);
         snprintf(buf, sizeof(buf), "ADC_REMOTE  (%c): %02x",
             remote_detect() ? '+' : '-', adc_remote);

firmware/target/coldfire/iaudio/x5/adc-target.h

@@ -28,7 +28,5 @@
 
 /* Force a scan now */
 unsigned short adc_scan(int channel);
-void adc_enable_button_scan(bool enable);
-bool adc_get_button_scan_enabled(void);
 
 #endif /* _ADC_TARGET_H_ */

firmware/target/coldfire/iaudio/x5/adc-x5.c

@@ -33,37 +33,11 @@ static const int adcc2_parms[] =
     [ADC_BATTERY] = 0x80 | (0 << 1) | 1, /* BATVOLT, resistive divider */
 };
 
-/* have buttons scan by default */
-static volatile bool button_scan_on = true;
-
-void adc_enable_button_scan(bool enable)
-{
-    button_scan_on = enable;
-}
-
-bool adc_get_button_scan_enabled(void)
-{
-    return button_scan_on;
-}
-
 unsigned short adc_scan(int channel)
 {
     int level;
     unsigned char data;
 
-    if (channel == ADC_BUTTONS)
-    {
-        /* no button scan if nothing pushed */
-        if (!button_scan_on)
-            return adcdata[channel] = 0xff;
-    }
-    else if (channel == ADC_REMOTE)
-    {
-        /* no remote scan if not plugged */
-        if (GPIO_READ & 0x01000000)
-            return adcdata[channel] = 0xff;
-    }
-
     level = set_irq_level(HIGHEST_IRQ_LEVEL);
 
     pcf50606_write(0x2f, adcc2_parms[channel]);

firmware/target/coldfire/iaudio/x5/button-target.h

@@ -29,6 +29,8 @@ bool button_hold(void);
 bool remote_button_hold(void);
 void button_init_device(void);
 int button_read_device(void);
+void button_enable_scan(bool enable);
+bool button_scan_enabled(void);
 
 /* iaudio X5 specific button codes */
 

firmware/target/coldfire/iaudio/x5/button-x5.c

@@ -16,16 +16,17 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-
-#include <stdlib.h>
 #include "config.h"
-#include "cpu.h"
 #include "system.h"
 #include "button.h"
-#include "kernel.h"
 #include "backlight.h"
 #include "adc.h"
-#include "system.h"
+#include "lcd-remote-target.h"
+
+/* have buttons scan by default */
+static bool button_scan_on     = true;
+static bool hold_button        = false;
+static bool remote_hold_button = false;
 
 void button_init_device(void)
 {
@@ -34,24 +35,32 @@ void button_init_device(void)
     GPIO_ENABLE &= ~0x0e000000;
 }
 
+void button_enable_scan(bool enable)
+{
+    button_scan_on = enable;
+}
+
+bool button_scan_enabled(void)
+{
+    return button_scan_on;
+}
+
 bool button_hold(void)
 {
-    return (GPIO_READ & 0x08000000)?false:true;
+    return (GPIO_READ & 0x08000000) == 0;
 }
 
 bool remote_button_hold(void)
 {
-    return adc_scan(ADC_REMOTE) < 0x17;
+    return remote_hold_button;
 }
 
 int button_read_device(void)
 {
-    int data;
-    int btn = BUTTON_NONE;
-    static bool hold_button = false;
-    static bool remote_hold_button = false;
+    int  btn = BUTTON_NONE;
     bool hold_button_old;
     bool remote_hold_button_old;
+    int  data;
 
     /* normal buttons */
     hold_button_old = hold_button;
@@ -63,9 +72,10 @@ int button_read_device(void)
         backlight_hold_changed(hold_button);
 #endif
 
-    if (!hold_button)
+    if (button_scan_on && !hold_button)
     {
         data = adc_scan(ADC_BUTTONS);
+
         if (data < 0xf0)
         {
             if(data < 0x7c)
@@ -91,9 +101,9 @@ int button_read_device(void)
     }
 
     /* remote buttons */
-    remote_hold_button_old = remote_hold_button;
+    data = remote_detect() ? adc_scan(ADC_REMOTE) : 0xff;
 
-    data = adc_scan(ADC_REMOTE);
+    remote_hold_button_old = remote_hold_button;
     remote_hold_button = data < 0x17;
 
 #ifndef BOOTLOADER
@@ -101,7 +111,7 @@ int button_read_device(void)
         remote_backlight_hold_changed(remote_hold_button);
 #endif
 
-    if(!remote_hold_button)
+    if (!remote_hold_button)
     {
         if (data < 0xee)
         {

firmware/target/coldfire/iaudio/x5/pcf50606-x5.c

@@ -20,7 +20,7 @@
 #include "system.h"
 #include "kernel.h"
 #include "pcf50606.h"
-#include "adc.h"
+#include "button-target.h"
 #include "powermgmt.h"
 
 /* These voltages were determined by measuring the output of the PCF50606
@@ -130,7 +130,7 @@ void GPI0(void)
         /* ACDINS/ACDREM */
         /* Check if adc_scan should actually scan main buttons or not -
            bias towards "yes" out of paranoia. */
-        adc_enable_button_scan((data[2] & 0x02) != 0 ||
-                               (pcf50606_read(0x33) & 0x01) != 0);
+        button_enable_scan((data[2] & 0x02) != 0 ||
+                           (pcf50606_read(0x33) & 0x01) != 0);
     }
 }