SPDIF_RBSP.cpp

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00023 
00024 #include "mbed.h"
00025 #include "SPDIF_RBSP.h"
00026 #include "pinmap.h"
00027 
00028 #if (R_BSP_SPDIF_ENABLE == 1)
00029 SPDIF_RBSP::SPDIF_RBSP(PinName audio_clk, PinName tx, PinName rx, bool tx_udata_enable,
00030     uint8_t int_level, int32_t max_write_num, int32_t max_read_num) 
00031        : mSpdif_(audio_clk, tx, rx) {
00032 
00033     spdif_cfg.enabled      = true;
00034     spdif_cfg.int_level    = int_level;
00035     if ((int32_t)audio_clk == NC) {
00036         spdif_cfg.clk_select   = SPDIF_CFG_CKS_AUDIO_X1;
00037     } else {
00038         spdif_cfg.clk_select   = SPDIF_CFG_CKS_AUDIO_CLK;
00039     }
00040     spdif_cfg.audio_bit_tx = SPDIF_CFG_AUDIO_BIT_24;
00041     spdif_cfg.audio_bit_rx = SPDIF_CFG_AUDIO_BIT_24;
00042     spdif_cfg.tx_u_data_enabled = tx_udata_enable;
00043     mSpdif_.init(&spdif_cfg, max_write_num, max_read_num);
00044 
00045     frequency(44100);              // Default sample frequency is 44.1kHz
00046 }
00047 
00048 // Public Functions
00049 bool SPDIF_RBSP::outputVolume(float leftVolumeOut, float rightVolumeOut) {
00050     // do nothing
00051     return false;
00052 }
00053 
00054 bool SPDIF_RBSP::micVolume(float VolumeIn) {
00055     // do nothing
00056     return false;
00057 }
00058 
00059 void SPDIF_RBSP::power(bool type) {
00060     // do nothing
00061 }
00062 
00063 bool SPDIF_RBSP::format(char length) {
00064     return mSpdif_.SetTransAudioBit(0, length);
00065 }
00066 
00067 bool SPDIF_RBSP::frequency(int hz) {
00068     uint32_t channel_status_Lch;
00069     uint32_t channel_status_Rch;
00070 
00071     /* Status Register
00072     b31:b30 Reserved - Read only bit       - 00:
00073     b29:b28 CLAC     - Clock Accuracy      - 01:   Level 1 (50 ppm)
00074     b27:b24 FS       - Sample Frequency    - 0000: 44.1kHz
00075     b23:b20 CHNO     - Channel Number      - 0001: Left (0010: Right)
00076     b19:b16 SRCNO    - Source Number       - 0000:
00077     b15:b8  CATCD    - Category Code       - 00000000: General 2-channel format
00078     b7:b6   Reserved - Read only bit       - 00: 
00079     b5:b1   CTL      - Control             - 0:  2 channel Audio, 
00080                                              00: Disable preemphasis
00081                                              0:  Disable copy
00082                                              0:  LPCM
00083     b0      Reserved - Read only bit       - 0: */
00084 
00085     switch (hz) {
00086         case 48000:
00087             channel_status_Lch = 0x12100000uL;
00088             channel_status_Rch = 0x12200000uL;
00089             break;
00090         case 44100:
00091             channel_status_Lch = 0x10100000uL;
00092             channel_status_Rch = 0x10200000uL;
00093             break;
00094         case 32000:
00095             channel_status_Lch = 0x13100000uL;
00096             channel_status_Rch = 0x13200000uL;
00097             break;
00098         default:
00099             return false;
00100     }
00101 
00102     return mSpdif_.SetChannelStatus(channel_status_Lch, channel_status_Rch);
00103 }
00104 
00105 int SPDIF_RBSP::write(void * const p_data, uint32_t data_size, const rbsp_data_conf_t * const p_data_conf) {
00106     return mSpdif_.write(p_data, data_size, p_data_conf);
00107 }
00108 
00109 int SPDIF_RBSP::write_s(spdif_t * const p_spdif_data, const rbsp_data_conf_t * const p_data_conf) {
00110     return mSpdif_.write((void *)p_spdif_data, 0, p_data_conf);
00111 }
00112 
00113 int SPDIF_RBSP::read(void * const p_data, uint32_t data_size, const rbsp_data_conf_t * const p_data_conf) {
00114     return mSpdif_.read(p_data, data_size, p_data_conf);
00115 }
00116 
00117 int SPDIF_RBSP::read_s(spdif_t * const p_spdif_data, const rbsp_data_conf_t * const p_data_conf) {
00118     return mSpdif_.read((void *)p_spdif_data, 0, p_data_conf);
00119 }
00120 
00121 #endif /* R_BSP_SPDIF_ENABLE */