diff options
Diffstat (limited to 'libmaple/dac.h')
| -rw-r--r-- | libmaple/dac.h | 150 |
1 files changed, 102 insertions, 48 deletions
diff --git a/libmaple/dac.h b/libmaple/dac.h index 340a49a..cf4fe85 100644 --- a/libmaple/dac.h +++ b/libmaple/dac.h @@ -22,92 +22,146 @@ * THE SOFTWARE. *****************************************************************************/ -/* - * See ../notes/dac.txt for more info - */ - /** * @file dac.h + * @brief Digital to analog converter header file */ +/* See notes/dac.txt for more info */ + #ifndef _DAC_H_ #define _DAC_H_ +#include "rcc.h" + #ifdef __cplusplus extern "C"{ #endif -#define DAC_BASE 0x40007400 - -typedef struct { - volatile uint32 CR; - volatile uint32 SWTRIGR; - volatile uint32 DHR12R1; - volatile uint32 DHR12L1; - volatile uint32 DHR8R1; - volatile uint32 DHR12R2; - volatile uint32 DHR12L2; - volatile uint32 DHR8R2; - volatile uint32 DHR12RD; - volatile uint32 DHR12LD; - volatile uint32 DHR8RD; - volatile uint32 DOR1; - volatile uint32 DOR2; -} DAC_Map; - -/* There's only one DAC, so expose it. */ -extern DAC_Map *dac; - -// And here are the register bit ranges -#define DAC_CR_EN1 BIT(0) -#define DAC_CR_BOFF1 BIT(1) -#define DAC_CR_TEN1 BIT(2) -#define DAC_CR_TSEL1 (BIT(3) | BIT(4) | BIT(5)) -#define DAC_CR_WAVE1 (BIT(6) | BIT(7)) -#define DAC_CR_MAMP1 (BIT(8) | BIT(9) | BIT(10) | BIT(11)) -#define DAC_CR_DMAEN1 BIT(12) -#define DAC_CR_EN2 BIT(16) -#define DAC_CR_BOFF2 BIT(17) -#define DAC_CR_TEN2 BIT(18) -#define DAC_CR_TSEL2 (BIT(19) | BIT(20) | BIT(21)) -#define DAC_CR_WAVE2 (BIT(22) | BIT(23)) -#define DAC_CR_MAMP2 (BIT(24) | BIT(25) | BIT(26) | BIT(27)) -#define DAC_CR_DMAEN2 BIT(28) - -#define DAC_SWTRIGR_SWTRIG1 BIT(0) -#define DAC_SWTRIGR_SWTRIG2 BIT(1) +/* + * Register maps + */ + +/** DAC register map. */ +typedef struct dac_reg_map { + __io uint32 CR; /**< Control register */ + __io uint32 SWTRIGR; /**< Software trigger register */ + __io uint32 DHR12R1; /**< Channel 1 12-bit right-aligned data + holding register */ + __io uint32 DHR12L1; /**< Channel 1 12-bit left-aligned data + holding register */ + __io uint32 DHR8R1; /**< Channel 1 8-bit left-aligned data + holding register */ + __io uint32 DHR12R2; /**< Channel 2 12-bit right-aligned data + holding register */ + __io uint32 DHR12L2; /**< Channel 2 12-bit left-aligned data + holding register */ + __io uint32 DHR8R2; /**< Channel 2 8-bit left-aligned data + holding register */ + __io uint32 DHR12RD; /**< Dual DAC 12-bit right-aligned data + holding register */ + __io uint32 DHR12LD; /**< Dual DAC 12-bit left-aligned data + holding register */ + __io uint32 DHR8RD; /**< Dual DAC 8-bit left-aligned data holding + register */ + __io uint32 DOR1; /**< Channel 1 data output register */ + __io uint32 DOR2; /**< Channel 2 data output register */ +} dac_reg_map; + +/** DAC register map base address */ +#define DAC_BASE ((dac_reg_map*)0x40007400) + +/* + * Devices + */ + +/** DAC device type. */ +typedef struct dac_dev { + dac_reg_map *regs; /**< Register map */ +} dac_dev; + +/** DAC device. */ +extern const dac_dev *DAC; + +/* + * Register bit definitions + */ +/* Control register */ +/* Channel 1 control */ +#define DAC_CR_EN1 BIT(0) /* Enable */ +#define DAC_CR_BOFF1 BIT(1) /* Output buffer disable */ +#define DAC_CR_TEN1 BIT(2) /* Trigger enable */ +#define DAC_CR_TSEL1 (0x7 << 3) /* Trigger selection */ +#define DAC_CR_WAVE1 (0x3 << 6) /* Noise/triangle wave enable */ +#define DAC_CR_MAMP1 (0xF << 8) /* Mask/amplitude selector */ +#define DAC_CR_DMAEN1 BIT(12) /* DMA enable */ +/* Channel 2 control */ +#define DAC_CR_EN2 BIT(16) /* Enable */ +#define DAC_CR_BOFF2 BIT(17) /* Output buffer disable */ +#define DAC_CR_TEN2 BIT(18) /* Trigger enable */ +#define DAC_CR_TSEL2 (0x7 << 19) /* Trigger selection */ +#define DAC_CR_WAVE2 (0x3 << 22) /* Noise/triangle wave generation*/ +#define DAC_CR_MAMP2 (0xF << 24) /* Mask/amplitude selector */ +#define DAC_CR_DMAEN2 BIT(28) /* DMA enable */ + +/* Software trigger register */ +#define DAC_SWTRIGR_SWTRIG1 BIT(0) /* Channel 1 software trigger */ +#define DAC_SWTRIGR_SWTRIG2 BIT(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 -#define DAC_DOR1 0x00000FFF +/* Channel 1 data output register */ +#define DAC_DOR1_DACC1DOR 0x00000FFF -#define DAC_DOR2 0x00000FFF +/* Channel 1 data output register */ +#define DAC_DOR2_DACC2DOR 0x00000FFF -void dac_init(void); -void dac_write(uint8 chan, uint16 val); +/* + * Convenience functions + */ + +/* We take the dev argument in these convenience functions 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 |