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29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
33 * \defgroup dac Generic DAC driver
36 * \brief Digital to Analog Converter driver (DAC).
38 * <b>Configuration file</b>: cfg_dac.h
40 * \author Daniele Basile <asterix@develer.com>
42 * $WIZ$ module_name = "dac"
43 * $WIZ$ module_configuration = "bertos/cfg/cfg_dac.h"
44 * $WIZ$ module_supports = "sam3x"
51 #include <cfg/compiler.h>
52 #include <cfg/debug.h>
53 #include <cfg/macros.h>
57 #include CPU_HEADER(dac)
62 typedef int (*DacWriteFunc_t) (struct Dac *dac, unsigned channel, uint16_t sample);
63 typedef void (*SetChannelMaskFunc_t) (struct Dac *dac, uint32_t mask);
64 typedef void (*SetSamplingRate_t) (struct Dac *dac, uint32_t rate);
65 typedef void (*DmaConversionBufFunc_t) (struct Dac *dac, void *buf, size_t len);
66 typedef bool (*DmaConversionIsFinished_t) (struct Dac *dac);
67 typedef void (*DmaStartStreamingFunc_t) (struct Dac *dac, void *buf, size_t len, size_t slice_len);
68 typedef void (*DmaStopFunc_t) (struct Dac *dac);
69 typedef void (*DmaCallbackFunc_t) (struct Dac *dac, void *_buf, size_t len);
71 typedef struct DacContext
74 SetChannelMaskFunc_t setCh;
75 SetSamplingRate_t setSampleRate;
76 DmaConversionBufFunc_t conversion;
77 DmaConversionIsFinished_t isFinished;
78 DmaStartStreamingFunc_t start;
80 DmaCallbackFunc_t callback;
90 struct DacHardware *hw;
93 INLINE int dac_write(Dac *dac, unsigned channel, uint16_t sample)
95 ASSERT(dac->ctx.write);
96 return dac->ctx.write(dac, channel, sample);
99 INLINE void dac_setChannelMask(struct Dac *dac, uint32_t mask)
101 ASSERT(dac->ctx.setCh);
102 dac->ctx.setCh(dac, mask);
105 INLINE void dac_setSamplingRate(Dac *dac, uint32_t rate)
107 ASSERT(dac->ctx.setSampleRate);
108 dac->ctx.setSampleRate(dac, rate);
112 * Convert \param len samples stored into \param buf.
114 INLINE void dac_dmaConversionBuffer(Dac *dac, void *buf, size_t len)
116 ASSERT(dac->ctx.conversion);
117 dac->ctx.conversion(dac, buf, len);
121 * Check if a dma transfer is finished.
123 * Useful for kernel-less applications.
125 INLINE bool dac_dmaIsFinished(Dac *dac)
127 ASSERT(dac->ctx.isFinished);
128 return dac->ctx.isFinished(dac);
132 * \param slicelen Must be a divisor of len, ie. len % slicelen == 0.
134 INLINE void dac_dmaStartStreaming(Dac *dac, void *buf, size_t len, size_t slice_len, DmaCallbackFunc_t callback)
136 ASSERT(dac->ctx.start);
137 ASSERT(len % slice_len == 0);
140 dac->ctx.callback = callback;
141 dac->ctx.slice_len = slice_len;
142 dac->ctx.start(dac, buf, len, slice_len);
145 INLINE void dac_dmaStop(Dac *dac)
147 ASSERT(dac->ctx.stop);
151 #define dac_bits() DAC_BITS
153 void dac_init(Dac *dac);
155 /** \} */ //defgroup dac
156 #endif /* DRV_DAC_H */