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Audio: Add I2S mode for TX external SCK/WS.

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This commit is contained in:
Jared Boone 2017-08-06 14:23:19 -07:00
parent 58e0432b56
commit fe7cc1e23f
1 changed files with 29 additions and 0 deletions
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29
firmware/application/audio.cpp
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@ -33,6 +33,8 @@ namespace audio {
namespace {
// "Master": I2S peripheral generates SCK/WS, transmits to audio codec.
constexpr i2s::ConfigTX i2s0_config_tx_master_base_clk {
.dao = i2s::DAO {
.wordwidth = i2s::WordWidth::Bits16,
@ -82,6 +84,33 @@ constexpr i2s::ConfigRX i2s0_config_rx_four_wire {
.sck_in_sel = 0,
};
// "Slave": I2S controlled by external SCK/WS, received from audio codec.
constexpr i2s::ConfigTX i2s0_config_tx_slave_base_clk {
.dao = i2s::DAO {
.wordwidth = i2s::WordWidth::Bits16,
.mono = 0,
.stop = 1,
.reset = 0,
.ws_sel = 1,
.ws_halfperiod = 0x0f,
.mute = 1,
},
.txrate = i2s::MCLKRate {
.x_divider = 0,
.y_divider = 0,
},
.txbitrate = i2s::BitRate {
.bitrate = 0,
},
.txmode = i2s::Mode {
.clksel = i2s::ClockSelect::FractionalDivider,
.four_pin = 0,
.mclk_out_en = 1,
},
.sck_in_sel = 1,
};
constexpr i2s::ConfigDMA i2s0_config_dma {
.dma1 = i2s::DMA {
.rx_enable = 1,