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33 * \brief HW pin handling for WM8731 audio codec.
36 * \author Daniele Basile <asterix@develer.com>
42 #include <cfg/macros.h>
45 #define WM8731_PIN_INIT() \
50 #define WM8731_MCLK_INIT() \
52 /* Disable PIO on PB22 connected to mclk of the wm8731 codec */ \
54 /* Select the output clock on same pin */ \
55 PIO_PERIPH_SEL(PIOB_BASE, BV(22), PIO_PERIPH_B); \
56 /* Prescale the cpu clock to the frequenzy that we want. */\
57 /* (multiply value of audio sample rate) */\
58 PMC_PCK0 = PMC_PCK_CSS_PLL | PMC_PCK_PRES_CLK_8; \
59 /* Enable the clock and wait until it starts correctly */ \
60 PMC_SCER = BV(PMC_PCK0_ID); \
61 while ((PMC_SR & BV(PMC_PCKRDY0)) == 0); \
65 #endif /* HW_WM8731_H */