4 * This file is part of BeRTOS.
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7 * it under the terms of the GNU General Public License as published by
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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21 * library without restriction. Specifically, if other files instantiate
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29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
33 * \brief DAC hardware-specific implementation
35 * \author Daniele Basile <asterix@develer.com>
39 #include "cfg/cfg_dac.h"
41 #include <cfg/macros.h>
42 #include <cfg/compiler.h>
44 // Define log settings for cfg/log.h.
45 #define LOG_LEVEL DAC_LOG_LEVEL
46 #define LOG_FORMAT DAC_LOG_FORMAT
51 #include <drv/irq_cm3.h>
59 static int sam3x_dac_write(DacContext *ctx, unsigned channel, uint16_t sample)
63 DACC_MR |= (channel << DACC_USER_SEL_SHIFT) & DACC_USER_SEL_MASK;
64 DACC_CHER |= BV(channel);
71 static void sam3x_dac_setCh(struct DacContext *ctx, uint32_t mask)
75 static void sam3x_dac_setSampleRate(struct DacContext *ctx, uint32_t rate)
79 static void sam3x_dac_conversion(struct DacContext *ctx, void *buf, size_t len)
81 DACC_TPR = (uint32_t)buf ;
83 DACC_PTCR |= BV(DACC_PTCR_TXTEN);
86 static bool sam3x_dac_isFinished(struct DacContext *ctx)
90 static void sam3x_dac_start(struct DacContext *ctx, void *buf, size_t len, size_t slicelen)
94 static void sam3x_dac_stop(struct DacContext *ctx)
99 void dac_init(struct DacContext *ctx)
101 ctx->write = sam3x_dac_write;
102 ctx->setCh = sam3x_dac_setCh;
103 ctx->setSampleRate = sam3x_dac_setSampleRate;
104 ctx->conversion = sam3x_dac_conversion;
105 ctx->isFinished = sam3x_dac_isFinished;
106 ctx->start = sam3x_dac_start;
107 ctx->stop = sam3x_dac_stop;
110 /* Clock ADC peripheral */
111 pmc_periphEnable(DACC_ID);
113 DACC_CR |= BV(DACC_SWRST);
117 DACC_MR |= (16 << DACC_REFRESH_SHIFT) & DACC_REFRESH_MASK;
119 DACC_MR |= (DACC_MR_STARTUP_0 << DACC_STARTUP_SHIFT) & DACC_STARTUP_MASK;