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Diffstat (limited to 'libmaple/include/libmaple/dac.h')
| -rw-r--r-- | libmaple/include/libmaple/dac.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/libmaple/include/libmaple/dac.h b/libmaple/include/libmaple/dac.h new file mode 100644 index 0000000..56bfdc4 --- /dev/null +++ b/libmaple/include/libmaple/dac.h @@ -0,0 +1,158 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2011, 2012 LeafLabs, LLC. + * Copyright (c) 2010 Bryan Newbold. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +/** + * @file libmaple/include/libmaple/dac.h + * @brief Digital to analog converter support. + */ + +/* See notes/dac.txt for more info */ + +#ifndef _LIBMAPLE_DAC_H_ +#define _LIBMAPLE_DAC_H_ + +#ifdef __cplusplus +extern "C"{ +#endif + +#include <series/dac.h> +#include <libmaple/libmaple_types.h> +#include <libmaple/rcc.h> +#include <libmaple/stm32.h> + +/* + * Register map base and device pointers. + * + * The DACs are the same on all supported targets, so it's not worth + * repeating these in the series headers. + */ + +#define DAC_BASE ((struct dac_reg_map*)0x40007400) + +/** DAC device type. */ +typedef struct dac_dev { + dac_reg_map *regs; /**< Register map */ +} dac_dev; + +#if STM32_HAVE_DAC +extern const dac_dev *DAC; +#endif + +/* + * Register bit definitions + */ + +/* Control register */ + +/* Channel 1 control */ +#define DAC_CR_EN1 (1U << 0) /* Enable */ +#define DAC_CR_BOFF1 (1U << 1) /* Output buffer disable */ +#define DAC_CR_TEN1 (1U << 2) /* Trigger enable */ +#define DAC_CR_TSEL1 (0x7 << 3) /* Trigger selection */ +#define DAC_CR_WAVE1 (0x3 << 6) /* Noise/triangle wave */ +#define DAC_CR_MAMP1 (0xF << 8) /* Mask/amplitude selector */ +#define DAC_CR_DMAEN1 (1U << 12) /* DMA enable */ +/* Channel 2 control */ +#define DAC_CR_EN2 (1U << 16) /* Enable */ +#define DAC_CR_BOFF2 (1U << 17) /* Output buffer disable */ +#define DAC_CR_TEN2 (1U << 18) /* Trigger enable */ +#define DAC_CR_TSEL2 (0x7 << 19) /* Trigger selection */ +#define DAC_CR_WAVE2 (0x3 << 22) /* Noise/triangle wave */ +#define DAC_CR_MAMP2 (0xF << 24) /* Mask/amplitude selector */ +#define DAC_CR_DMAEN2 (1U << 28) /* DMA enable */ + +/* Software trigger register */ + +#define DAC_SWTRIGR_SWTRIG1 (1U << 0) /* Channel 1 software trigger */ +#define DAC_SWTRIGR_SWTRIG2 (1U << 1) /* Channel 2 software trigger */ + +/* Channel 1 12-bit right-aligned data holding register */ + +#define DAC_DHR12R1_DACC1DHR 0x00000FFF + +/* Channel 1 12-bit left-aligned data holding register */ + +#define DAC_DHR12L1_DACC1DHR 0x0000FFF0 + +/* Channel 1 8-bit left-aligned data holding register */ + +#define DAC_DHR8R1_DACC1DHR 0x000000FF + +/* Channel 2 12-bit right-aligned data holding register */ + +#define DAC_DHR12R2_DACC2DHR 0x00000FFF + +/* Channel 2 12-bit left-aligned data holding register */ + +#define DAC_DHR12L2_DACC2DHR 0x0000FFF0 + +/* Channel 2 8-bit left-aligned data holding register */ + +#define DAC_DHR8R2_DACC2DHR 0x000000FF + +/* Dual DAC 12-bit right-aligned data holding register */ + +#define DAC_DHR12RD_DACC1DHR 0x00000FFF +#define DAC_DHR12RD_DACC2DHR 0x0FFF0000 + +/* Dual DAC 12-bit left-aligned data holding register */ + +#define DAC_DHR12LD_DACC1DHR 0x0000FFF0 +#define DAC_DHR12LD_DACC2DHR 0xFFF00000 + +/* Dual DAC 8-bit left-aligned data holding register */ + +#define DAC_DHR8RD_DACC1DHR 0x000000FF +#define DAC_DHR8RD_DACC2DHR 0x0000FF00 + +/* Channel 1 data output register */ + +#define DAC_DOR1_DACC1DOR 0x00000FFF + +/* Channel 1 data output register */ + +#define DAC_DOR2_DACC2DOR 0x00000FFF + +/* + * Routines + */ + +/* We take the dev argument in these for future-proofing */ + +#define DAC_CH1 0x1 +#define DAC_CH2 0x2 +void dac_init(const dac_dev *dev, uint32 flags); + +void dac_write_channel(const dac_dev *dev, uint8 channel, uint16 val); +void dac_enable_channel(const dac_dev *dev, uint8 channel); +void dac_disable_channel(const dac_dev *dev, uint8 channel); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif |