Renesas
The "GR-PEACH_Audio_Playback_Sample" is a sample code that can provides high-resolution audio playback of FLAC format files. It also allows the user to audio-playback control functions such as play, pause, and stop by manipulating key switches.
Dependencies: R_BSP TLV320_RBSP USBHost_custom
Note
For a sample program of with LCD Board,
please refer to GR-PEACH_Audio_Playback_7InchLCD_Sample.
Introduction
The "GR-PEACH_Audio_Playback_Sample" is a sample code that can provides high-resolution audio playback of FLAC format files. It also allows the user to audio-playback control functions such as play, pause, and stop by manipulating key switches.
1. Overview of the Sample Code
1.1 Software Block Diagram
Figure 1.1 shows the software block diagram.
1.2 Pin Definitions
Table 1.1 shows the pins that this sample code are to use.
2. Sample Code Operating Environment
This sample code runs in GR-PEACH + the Audio/Camera shield for the GR-PEACH environment. This section explains the functions of the ports that are used by this sample code.
2.1 Operating Environment
Figure 2.1 shows the configuration of the operating environment for running this sample code.
2.2 List of User Operations
A list of user operations on the command line, TFT touch keys, and switch key that the user can perform for this sample code is shown in. Table 2.1.
3. Function Outline
The functions of this sample code are summarized in Table 3.1 to Table 3.3.
3.1 Playback Control
The playback control that the sample code supports include play, pause, stop, skip to next, and skip to previous.
3.2 Trick Play Control
Manipulating "Repeat" alternates between "Repeat mode On" and "Repeat mode Off". The default mode is "Repeat mode On". When the repeat mode is on, the playback of the first song starts after the playback of the last song is finished. When the repeat mode is off, the sample code enters the stopped state after the playback of the last song is finished.
3.3 Acquisition of the Song Information
The information of the song being played is obtained by operating the "Play info" during the playback of the song. Table 3.4 lists the items of information that can be obtained by the "Play info" operation.
3.4 How the Folder Structure is Analyzed
The sample coded analyzes the folder structure in the breadth-first search order. The order in which files are numbered is illustrated in Table 3.5. The sample code does not sort the files by file or folder name.
4.Others
The default setting of serial communication (baud rate etc.) in mbed is shown the following link.
Please refer to the link and change the settings of your PC terminal software.
The default value of baud rate in mbed is 9600, and this application uses baud rate 9600.
https://developer.mbed.org/teams/Renesas/wiki/GR-PEACH-Getting-Started#install-the-usb-serial-communication
Revision 6:df19c3e787ca, committed 2017-03-31
- Comitter:
- Osamu Nakamura
- Date:
- Fri Mar 31 14:00:23 2017 +0900
- Parent:
- 5:c140dcdc2d45
- Commit message:
- Introduced mbedOS 5 instead of mbedOS 2 (classic)
Changed in this revision
--- a/USBHost.lib Mon Apr 18 13:04:31 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/USBHost/#028508fd50fa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHost_custom.lib Fri Mar 31 14:00:23 2017 +0900 @@ -0,0 +1,1 @@ +https://developer.mbed.org/teams/Renesas/code/USBHost_custom/#cdc0d2ab4678
--- a/main/sys_scan_folder.cpp Mon Apr 18 13:04:31 2016 +0000 +++ b/main/sys_scan_folder.cpp Fri Mar 31 14:00:23 2017 +0900 @@ -22,6 +22,7 @@ *******************************************************************************/ #include "mbed.h" +#include "FATFileSystem.h" #include "USBHostMSD.h" #include "sys_scan_folder.h"
--- a/main/system.cpp Mon Apr 18 13:04:31 2016 +0000
+++ b/main/system.cpp Fri Mar 31 14:00:23 2017 +0900
@@ -23,6 +23,7 @@
#include "mbed.h"
#include "rtos.h"
+#include "FATFileSystem.h"
#include "USBHostMSD.h"
#include "system.h"
@@ -161,7 +162,8 @@
const fid_scan_folder_t * const p_data, const SYS_MAIL_ID mail_id,
const uint32_t * const p_param);
static SYS_EVENT check_usb_event(const SYS_STATE stat,
- const usb_ctrl_t * const p_ctrl, USBHostMSD * const p_msd);
+ const usb_ctrl_t * const p_ctrl, USBHostMSD * const p_msd,
+ FATFileSystem * const p_fs);
static SYS_STATE state_trans_proc(const SYS_STATE stat,
const SYS_EVENT event, sys_ctrl_t * const p_ctrl);
static SYS_STATE state_trans_proc(const SYS_STATE stat,
@@ -216,7 +218,8 @@
SYS_MAIL_ID mail_type;
uint32_t mail_param[MAIL_PARAM_NUM];
static sys_ctrl_t sys_ctrl;
- static USBHostMSD msd(SYS_USB_MOUNT_NAME);
+ static FATFileSystem fs(SYS_USB_MOUNT_NAME);
+ static USBHostMSD msd;
#if (USB_HOST_CH == 1) /* Audio Shield USB1 */
static DigitalOut usb1en(P3_8);
@@ -230,7 +233,7 @@
init_ctrl_data(&sys_ctrl);
sys_stat = SYS_ST_WAIT_USB_CONNECT;
while (1) {
- sys_ev = check_usb_event(sys_stat, &sys_ctrl.usb_ctrl, &msd);
+ sys_ev = check_usb_event(sys_stat, &sys_ctrl.usb_ctrl, &msd, &fs);
if (sys_ev == SYS_EV_NON) {
result = recv_mail(&mail_type, &mail_param[MAIL_PARAM0],
&mail_param[MAIL_PARAM1], &mail_param[MAIL_PARAM2]);
@@ -417,14 +420,17 @@
* @param stat Status of main thread
* @param p_ctrl Pointer to the control data of USB memory
* @param p_msd Pointer to the class object of USBHostMSD
+ * @param P_fs Pointer to the class oblect of FATFileSystem
*
* @returns
* The event code of SYS_EVENT
*/
static SYS_EVENT check_usb_event(const SYS_STATE stat,
- const usb_ctrl_t * const p_ctrl, USBHostMSD * const p_msd)
+ const usb_ctrl_t * const p_ctrl,
+ USBHostMSD * const p_msd, FATFileSystem * const p_fs)
{
SYS_EVENT ret = SYS_EV_NON;
+ int iRet;
bool result;
if ((p_ctrl != NULL) && (p_msd != NULL)) {
@@ -433,8 +439,8 @@
/* Because the connecting USB memory is changed. */
result = p_msd->connect();
if (result == true) {
- (void) p_msd->unmount();
- (void) p_msd->mount();
+ iRet = p_fs->unmount();
+ iRet = p_fs->mount(p_msd);
ret = SYS_EV_USB_CONNECT;
}
} else if (p_ctrl->usb_flag_detach != true) {
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Fri Mar 31 14:00:23 2017 +0900 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#cc58a7fb0c979440ab13a7fb25c4acd12009ae1c
--- a/mbed.bld Mon Apr 18 13:04:31 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/082adc85693f \ No newline at end of file