diff options
Diffstat (limited to 'firmware/drivers/i2s.h')
| -rw-r--r-- | firmware/drivers/i2s.h | 71 |
1 files changed, 45 insertions, 26 deletions
diff --git a/firmware/drivers/i2s.h b/firmware/drivers/i2s.h index 8107e30..6a8d446 100644 --- a/firmware/drivers/i2s.h +++ b/firmware/drivers/i2s.h @@ -70,30 +70,30 @@ void i2s_set_clksel(i2s_clksel_t sel); void i2s_set_pinsel(); typedef enum { - WW_8_BIT = 0b00, // 8-bit data - WW_16_BIT = 0b01, // 16-bit data - // WW_RESERVED = 0b10, // Reserved, do not use this setting - WW_32_BIT = 0b11, // 32-bit data -} wordwidth_t; + I2S_WW_8_BIT = 0b00, // 8-bit data + I2S_WW_16_BIT = 0b01, // 16-bit data + //I2S_WW_RESERVED = 0b10, // Reserved, do not use this setting + I2S_WW_32_BIT = 0b11, // 32-bit data +} i2s_wordwidth_t; typedef enum { - CH_MONO = 0b1, // Data is mono format - CH_STEREO = 0b0, // Data is stereo format -} channels_t; + I2S_CH_MONO = 0b1, // Data is mono format + I2S_CH_STEREO = 0b0, // Data is stereo format +} i2s_channels_t; /** * Sets DAO register values and stops/resets the bus. * @param ww Word width of pcm values. * @param ch Number of channels (mono/stereo) */ -void i2s_set_dao_register(wordwidth_t ww, channels_t ch); +void i2s_set_dao_register(i2s_wordwidth_t ww, i2s_channels_t ch); /** * Sets DAI register values and stops/resets the bus. * @param ww Word width of pcm values. * @param ch Number of channels (mono/stereo) */ -void i2s_set_dai_register(wordwidth_t ww, channels_t ch); +void i2s_set_dai_register(i2s_wordwidth_t ww, i2s_channels_t ch); /** * Set clock transmit rate as PCLK_I2S * (X/Y) / 2 @@ -136,17 +136,22 @@ void i2s_set_rx_clock_bitrate(uint8_t bitrate); typedef enum { CLK_TX_SRC = 0b00, ///< Select the TX fractional rate divider clock output as the source CLK_RX_MCLK = 0b10, ///< Select the RX_MCLK signal as the TX_MCLK clock source -} clksel_t; +} i2s_tx_clksel_t; /** * */ -void i2s_set_tx_mode_control(clksel_t c, int _4pin, int mcena); +void i2s_set_tx_mode_control(i2s_tx_clksel_t c, int _4pin, int mcena); + +typedef enum { + CLK_RX_SRC = 0b00, ///< Select the RX fractional rate divider clock output as the source + CLK_TX_MCLK = 0b10, ///< Select the TX_MCLK signal as the RX_MCLK clock source +} i2s_rx_clksel_t; /** * */ -void i2s_set_rx_mode_control(clksel_t c, int _4pin, int mcena); +void i2s_set_rx_mode_control(i2s_rx_clksel_t c, int _4pin, int mcena); void i2s_tx_reset(); void i2s_tx_stop(); @@ -173,14 +178,17 @@ void i2s_rx_start(); * I2STXFIFO: 0x400A 8008 - 8 x 32 bit (see table 407, pg 477) */ #define TF(t, n) t *n = (t*)0x400A8008 -inline void i2s_write_pcm_8_mono(int8_t s) { TF(int8_t, t); t[0] = s; } -inline void i2s_write_pcm_16_mono(int16_t s) { TF(int16_t, t); t[0] = s; } -inline void i2s_write_pcm_32_mono(int32_t s) { TF(int32_t, t); t[0] = s; } -inline void i2s_write_pcm_8_stereo(int8_t l, int8_t r) +static inline void i2s_write_pcm_8_mono(int8_t s) +{ TF(int8_t, t); t[0] = s; } +static inline void i2s_write_pcm_16_mono(int16_t s) +{ TF(int16_t, t); t[0] = s; } +static inline void i2s_write_pcm_32_mono(int32_t s) +{ TF(int32_t, t); t[0] = s; } +static inline void i2s_write_pcm_8_stereo(int8_t l, int8_t r) { TF(int8_t, t); t[0] = l; t[1] = r; } -inline void i2s_write_pcm_16_stereo(int16_t l, int16_t r) +static inline void i2s_write_pcm_16_stereo(int16_t l, int16_t r) { TF(int16_t, t); t[0] = l; t[1] = r; } -inline void i2s_write_pcm_32_stereo(int32_t l, int32_t r) +static inline void i2s_write_pcm_32_stereo(int32_t l, int32_t r) { TF(int32_t, t); t[0] = l; t[1] = r; } /** @@ -188,20 +196,31 @@ inline void i2s_write_pcm_32_stereo(int32_t l, int32_t r) * I2SRXFIFO: 0x400A 800C - 8 x 32 bit (see table 408, pg 478) */ #define RF(t, n) t *n = (t*)0x400A800C -inline void i2s_read_pcm_8_mono(int8_t *s) { RF(int8_t, t); *s = t[0]; } -inline void i2s_read_pcm_16_mono(int16_t *s) { RF(int16_t, t); *s = t[0]; } -inline void i2s_read_pcm_32_mono(int32_t *s) { RF(int32_t, t); *s = t[0]; } -inline void i2s_read_pcm_8_stereo(int8_t *l, int8_t *r) +static inline void i2s_read_pcm_8_mono(int8_t *s) +{ RF(int8_t, t); *s = t[0]; } +static inline void i2s_read_pcm_16_mono(int16_t *s) +{ RF(int16_t, t); *s = t[0]; } +static inline void i2s_read_pcm_32_mono(int32_t *s) +{ RF(int32_t, t); *s = t[0]; } +static inline void i2s_read_pcm_8_stereo(int8_t *l, int8_t *r) { RF(int8_t, t); *l = t[0]; *r = t[1]; } -inline void i2s_read_pcm_16_stereo(int16_t *l, int16_t *r) +static inline void i2s_read_pcm_16_stereo(int16_t *l, int16_t *r) { RF(int16_t, t); *l = t[0]; *r = t[1]; } -inline void i2s_read_pcm_32_stereo(int32_t *l, int32_t *r) +static inline void i2s_read_pcm_32_stereo(int32_t *l, int32_t *r) { RF(int32_t, t); *l = t[0]; *r = t[1]; } /** * Convenience function for power, pin, clock and register configuration. + * @param pclkdiv Value of pclkdiv as found by the clkcalc tool. + * @param bitrate Value of bitrate as found by the clkcalc tool. + * @param x Value of x as found by the clkcalc tool. + * @param y Value of y as found by the clkcalc tool. + * @param bitwidth Width of each sample in bits (8, 16 or 32). + * @param channels Number of channels (1 or 2). + * @return 0 on success, 1 on error. */ -void i2s_init(); +int i2s_init(int pclkdiv, int bitrate, int x, int y, + int bitwidth, int channels); /** |