pios_dac.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Additional note on redistribution: The copyright and license notices above
 * must be maintained in each individual source file that is a derivative work
 * of this source file; otherwise redistribution is prohibited.
 */

#ifndef _PIOS_DAC_H
#define _PIOS_DAC_H

#include <stdint.h>
#include <stdio.h>

#include "stm32f4xx_dac.h"

typedef struct dac_dev_s *dac_dev_t;

struct pios_dac_cfg {
        TIM_TypeDef *timer;
        TIM_TimeBaseInitTypeDef clock_cfg;

        NVIC_InitTypeDef interrupt;

        GPIO_TypeDef *gpio;
        uint16_t gpio_pin;

        DMA_Stream_TypeDef *dma_stream;
        uint32_t dma_channel;

        uint32_t dac_channel;
        uint32_t dac_trigger;
        uintptr_t dac_outreg;

        uint32_t dma_tcif;
};

int PIOS_DAC_init(dac_dev_t *dev_out,
                const struct pios_dac_cfg *cfg);

void PIOS_DAC_dma_interrupt_handler(dac_dev_t dev);

typedef bool (*fill_dma_cb)(void *ctx, uint16_t *buf, int len);

bool PIOS_DAC_install_callback(dac_dev_t dev, uint8_t priority, fill_dma_cb cb,
                void *ctx);

#endif /* _PIOS_DAC_H */