/*!
    \file  gd32f4xx_dac.h
    \brief definitions for the DAC
*/

/*
    Copyright (C) 2016 GigaDevice

    2016-08-15, V1.0.0, firmware for GD32F4xx
*/

#ifndef GD32F4XX_DAC_H
#define GD32F4XX_DAC_H

#include "gd32f4xx.h"

/* DACx(x=0,1) definitions */
#define DAC                     DAC_BASE
#define DAC0                    0U
#define DAC1                    1U

/* registers definitions */
#define DAC_CTL                 REG32(DAC + 0x00U)   /*!< DAC control register */
#define DAC_SWT                 REG32(DAC + 0x04U)   /*!< DAC software trigger register */
#define DAC0_R12DH              REG32(DAC + 0x08U)   /*!< DAC0 12-bit right-aligned data holding register */
#define DAC0_L12DH              REG32(DAC + 0x0CU)   /*!< DAC0 12-bit left-aligned data holding register */
#define DAC0_R8DH               REG32(DAC + 0x10U)   /*!< DAC0 8-bit right-aligned data holding register */
#define DAC1_R12DH              REG32(DAC + 0x14U)   /*!< DAC1 12-bit right-aligned data holding register */
#define DAC1_L12DH              REG32(DAC + 0x18U)   /*!< DAC1 12-bit left-aligned data holding register */
#define DAC1_R8DH               REG32(DAC + 0x1CU)   /*!< DAC1 8-bit right-aligned data holding register */
#define DACC_R12DH              REG32(DAC + 0x20U)   /*!< DAC concurrent mode 12-bit right-aligned data holding register */
#define DACC_L12DH              REG32(DAC + 0x24U)   /*!< DAC concurrent mode 12-bit left-aligned data holding register */
#define DACC_R8DH               REG32(DAC + 0x28U)   /*!< DAC concurrent mode 8-bit right-aligned data holding register */
#define DAC0_DO                 REG32(DAC + 0x2CU)   /*!< DAC0 data output register */
#define DAC1_DO                 REG32(DAC + 0x30U)   /*!< DAC1 data output register */
#define DAC_STAT                REG32(DAC + 0x34U)   /*!< DAC status register */

/* bits definitions */
/* DAC_CLT */
#define DAC_CTL_DEN0            BIT(0)               /*!< DAC0 enable/disable bit */
#define DAC_CTL_DBOFF0          BIT(1)               /*!< DAC0 output buffer turn on/turn off bit */
#define DAC_CTL_DTEN0           BIT(2)               /*!< DAC0 trigger enable/disable bit */
#define DAC_CTL_DTSEL0          BITS(3,5)            /*!< DAC0 trigger source selection enable/disable bits */
#define DAC_CTL_DWM0            BITS(6,7)            /*!< DAC0 noise wave mode */
#define DAC_CTL_DWBW0           BITS(8,11)           /*!< DAC0 noise wave bit width */
#define DAC_CTL_DDMAEN0         BIT(12)              /*!< DAC0 DMA enable/disanle bit */
#define DAC_CTL_DDUDRIE0        BIT(13)              /*!< DAC0 DMA underrun interrupt enable/disable bit */
#define DAC_CTL_DEN1            BIT(16)              /*!< DAC1 enable/disable bit */ 
#define DAC_CTL_DBOFF1          BIT(17)              /*!< DAC1 output buffer turn on/turn off bit */
#define DAC_CTL_DTEN1           BIT(18)              /*!< DAC1 trigger enable/disable bit */
#define DAC_CTL_DTSEL1          BITS(19,21)          /*!< DAC1 trigger source selection enable/disable bits */
#define DAC_CTL_DWM1            BITS(22,23)          /*!< DAC1 noise wave mode */
#define DAC_CTL_DWBW1           BITS(24,27)          /*!< DAC1 noise wave bit width */
#define DAC_CTL_DDMAEN1         BIT(28)              /*!< DAC1 DMA enable/disanle bit */
#define DAC_CTL_DDUDRIE1        BIT(29)              /*!< DAC1 DMA underrun interrupt enable/disable bit */

/* DAC_SWT */
#define DAC_SWT_SWTR0           BIT(0)               /*!< DAC0 software trigger bit, cleared by hardware */
#define DAC_SWT_SWTR1           BIT(1)               /*!< DAC1 software trigger bit, cleared by hardware */

/* DAC0_R12DH */
#define DAC0_R12DH_DAC0_DH      BITS(0,11)           /*!< DAC0 12-bit right-aligned data bits */

/* DAC0_L12DH */
#define DAC0_L12DH_DAC0_DH      BITS(4,15)           /*!< DAC0 12-bit left-aligned data bits */

/* DAC0_R8DH */
#define DAC0_R8DH_DAC0_DH       BITS(0,7)            /*!< DAC0 8-bit right-aligned data bits */

/* DAC1_R12DH */
#define DAC1_R12DH_DAC1_DH      BITS(0,11)           /*!< DAC1 12-bit right-aligned data bits */

/* DAC1_L12DH */
#define DAC1_L12DH_DAC1_DH      BITS(4,15)           /*!< DAC1 12-bit left-aligned data bits */

/* DAC1_R8DH */
#define DAC1_R8DH_DAC1_DH       BITS(0,7)            /*!< DAC1 8-bit right-aligned data bits */

/* DACC_R12DH */
#define DACC_R12DH_DAC0_DH      BITS(0,11)           /*!< DAC concurrent mode DAC0 12-bit right-aligned data bits */
#define DACC_R12DH_DAC1_DH      BITS(16,27)          /*!< DAC concurrent mode DAC1 12-bit right-aligned data bits */

/* DACC_L12DH */
#define DACC_L12DH_DAC0_DH      BITS(4,15)           /*!< DAC concurrent mode DAC0 12-bit left-aligned data bits */
#define DACC_L12DH_DAC1_DH      BITS(20,31)          /*!< DAC concurrent mode DAC1 12-bit left-aligned data bits */

/* DACC_R8DH */
#define DACC_R8DH_DAC0_DH       BITS(0,7)            /*!< DAC concurrent mode DAC0 8-bit right-aligned data bits */
#define DACC_R8DH_DAC1_DH       BITS(16,23)          /*!< DAC concurrent mode DAC1 8-bit right-aligned data bits */

/* DAC0_DO */
#define DAC0_DO_DAC0_DO         BITS(0,11)           /*!< DAC0 12-bit output data bits */

/* DAC1_DO */
#define DAC1_DO_DAC1_DO         BITS(0,11)           /*!< DAC1 12-bit output data bits */

/* DAC_STAT */
#define DAC_STAT_DDUDR0         BIT(13)              /*!< DAC0 DMA underrun flag */
#define DAC_STAT_DDUDR1         BIT(29)              /*!< DAC1 DMA underrun flag */

/* constants definitions */
/* DAC trigger source */
#define CTL_DTSEL(regval)       (BITS(3,5) & ((uint32_t)(regval) << 3))
#define DAC_TRIGGER_T5_TRGO     CTL_DTSEL(0)         /*!< TIMER5 TRGO */
#define DAC_TRIGGER_T7_TRGO     CTL_DTSEL(1)         /*!< TIMER7 TRGO */
#define DAC_TRIGGER_T6_TRGO     CTL_DTSEL(2)         /*!< TIMER6 TRGO */
#define DAC_TRIGGER_T4_TRGO     CTL_DTSEL(3)         /*!< TIMER4 TRGO */
#define DAC_TRIGGER_T1_TRGO     CTL_DTSEL(4)         /*!< TIMER1 TRGO */
#define DAC_TRIGGER_T3_TRGO     CTL_DTSEL(5)         /*!< TIMER3 TRGO */
#define DAC_TRIGGER_EXTI_9      CTL_DTSEL(6)         /*!< EXTI interrupt line9 event */
#define DAC_TRIGGER_SOFTWARE    CTL_DTSEL(7)         /*!< software trigger */

/* DAC noise wave mode */
#define CTL_DWM(regval)         (BITS(6,7) & ((uint32_t)(regval) << 6))
#define DAC_WAVE_DISABLE        CTL_DWM(0)           /*!< wave disable */
#define DAC_WAVE_MODE_LFSR      CTL_DWM(1)           /*!< LFSR noise mode */
#define DAC_WAVE_MODE_TRIANGLE  CTL_DWM(2)           /*!< triangle noise mode */

/* DAC noise wave bit width */
#define DWBW(regval)            (BITS(8,11) & ((uint32_t)(regval) << 8))
#define DAC_WAVE_BIT_WIDTH_1    DWBW(0)              /*!< bit width of the wave signal is 1 */
#define DAC_WAVE_BIT_WIDTH_2    DWBW(1)              /*!< bit width of the wave signal is 2 */
#define DAC_WAVE_BIT_WIDTH_3    DWBW(2)              /*!< bit width of the wave signal is 3 */
#define DAC_WAVE_BIT_WIDTH_4    DWBW(3)              /*!< bit width of the wave signal is 4 */
#define DAC_WAVE_BIT_WIDTH_5    DWBW(4)              /*!< bit width of the wave signal is 5 */
#define DAC_WAVE_BIT_WIDTH_6    DWBW(5)              /*!< bit width of the wave signal is 6 */
#define DAC_WAVE_BIT_WIDTH_7    DWBW(6)              /*!< bit width of the wave signal is 7 */
#define DAC_WAVE_BIT_WIDTH_8    DWBW(7)              /*!< bit width of the wave signal is 8 */
#define DAC_WAVE_BIT_WIDTH_9    DWBW(8)              /*!< bit width of the wave signal is 9 */
#define DAC_WAVE_BIT_WIDTH_10   DWBW(9)              /*!< bit width of the wave signal is 10 */
#define DAC_WAVE_BIT_WIDTH_11   DWBW(10)             /*!< bit width of the wave signal is 11 */
#define DAC_WAVE_BIT_WIDTH_12   DWBW(11)             /*!< bit width of the wave signal is 12 */

/* unmask LFSR bits in DAC LFSR noise mode */
#define DAC_LFSR_BIT0           DAC_WAVE_BIT_WIDTH_1  /*!< unmask the LFSR bit0 */
#define DAC_LFSR_BITS1_0        DAC_WAVE_BIT_WIDTH_2  /*!< unmask the LFSR bits[1:0] */
#define DAC_LFSR_BITS2_0        DAC_WAVE_BIT_WIDTH_3  /*!< unmask the LFSR bits[2:0] */
#define DAC_LFSR_BITS3_0        DAC_WAVE_BIT_WIDTH_4  /*!< unmask the LFSR bits[3:0] */
#define DAC_LFSR_BITS4_0        DAC_WAVE_BIT_WIDTH_5  /*!< unmask the LFSR bits[4:0] */
#define DAC_LFSR_BITS5_0        DAC_WAVE_BIT_WIDTH_6  /*!< unmask the LFSR bits[5:0] */
#define DAC_LFSR_BITS6_0        DAC_WAVE_BIT_WIDTH_7  /*!< unmask the LFSR bits[6:0] */
#define DAC_LFSR_BITS7_0        DAC_WAVE_BIT_WIDTH_8  /*!< unmask the LFSR bits[7:0] */
#define DAC_LFSR_BITS8_0        DAC_WAVE_BIT_WIDTH_9  /*!< unmask the LFSR bits[8:0] */
#define DAC_LFSR_BITS9_0        DAC_WAVE_BIT_WIDTH_10 /*!< unmask the LFSR bits[9:0] */
#define DAC_LFSR_BITS10_0       DAC_WAVE_BIT_WIDTH_11 /*!< unmask the LFSR bits[10:0] */
#define DAC_LFSR_BITS11_0       DAC_WAVE_BIT_WIDTH_12 /*!< unmask the LFSR bits[11:0] */

/* triangle amplitude in DAC triangle noise mode */
#define DAC_TRIANGLE_AMPLITUDE_1    DAC_WAVE_BIT_WIDTH_1  /*!< triangle amplitude is 1 */
#define DAC_TRIANGLE_AMPLITUDE_3    DAC_WAVE_BIT_WIDTH_2  /*!< triangle amplitude is 3 */
#define DAC_TRIANGLE_AMPLITUDE_7    DAC_WAVE_BIT_WIDTH_3  /*!< triangle amplitude is 7 */
#define DAC_TRIANGLE_AMPLITUDE_15   DAC_WAVE_BIT_WIDTH_4  /*!< triangle amplitude is 15 */
#define DAC_TRIANGLE_AMPLITUDE_31   DAC_WAVE_BIT_WIDTH_5  /*!< triangle amplitude is 31 */
#define DAC_TRIANGLE_AMPLITUDE_63   DAC_WAVE_BIT_WIDTH_6  /*!< triangle amplitude is 63 */
#define DAC_TRIANGLE_AMPLITUDE_127  DAC_WAVE_BIT_WIDTH_7  /*!< triangle amplitude is 127 */
#define DAC_TRIANGLE_AMPLITUDE_255  DAC_WAVE_BIT_WIDTH_8  /*!< triangle amplitude is 255 */
#define DAC_TRIANGLE_AMPLITUDE_511  DAC_WAVE_BIT_WIDTH_9  /*!< triangle amplitude is 511 */
#define DAC_TRIANGLE_AMPLITUDE_1023 DAC_WAVE_BIT_WIDTH_10 /*!< triangle amplitude is 1023 */
#define DAC_TRIANGLE_AMPLITUDE_2047 DAC_WAVE_BIT_WIDTH_11 /*!< triangle amplitude is 2047 */
#define DAC_TRIANGLE_AMPLITUDE_4095 DAC_WAVE_BIT_WIDTH_12 /*!< triangle amplitude is 4095 */

/* DAC data alignment */
#define DATA_ALIGN(regval)      (BITS(0,1) & ((uint32_t)(regval) << 0))
#define DAC_ALIGN_12B_R         DATA_ALIGN(0)        /*!< data right 12b alignment */
#define DAC_ALIGN_12B_L         DATA_ALIGN(1)        /*!< data left 12b alignment */
#define DAC_ALIGN_8B_R          DATA_ALIGN(2)        /*!< data right 8b alignment */

/* function declarations */
/* deinitialize DAC */
void dac_deinit(void);
/* enable DAC */
void dac_enable(uint32_t dac_periph);
/* disable DAC */
void dac_disable(uint32_t dac_periph);
/* enable DAC DMA */
void dac_dma_enable(uint32_t dac_periph);
/* disable DAC DMA */
void dac_dma_disable(uint32_t dac_periph); 
/* enable DAC output buffer */
void dac_output_buffer_enable(uint32_t dac_periph);
/* disable DAC output buffer */
void dac_output_buffer_disable(uint32_t dac_periph);
/* enable DAC trigger */
void dac_trigger_enable(uint32_t dac_periph);
/* disable DAC trigger */
void dac_trigger_disable(uint32_t dac_periph);
/* enable DAC software trigger */
void dac_software_trigger_enable(uint32_t dac_periph);
/* disable DAC software trigger */
void dac_software_trigger_disable(uint32_t dac_periph);
/* enable DAC interrupt(DAC0 DMA underrun interrupt) */
void dac_interrupt_enable(uint32_t dac_periph);
/* disable DAC interrupt(DAC0 DMA underrun interrupt) */
void dac_interrupt_disable(uint32_t dac_periph);

/* configure DAC trigger source */
void dac_trigger_source_config(uint32_t dac_periph, uint32_t triggersource);
/* configure DAC wave mode */
void dac_wave_mode_config(uint32_t dac_periph, uint32_t wave_mode);
/* configure DAC wave bit width */
void dac_wave_bit_width_config(uint32_t dac_periph, uint32_t bit_width);
/* configure DAC LFSR noise mode */
void dac_lfsr_noise_config(uint32_t dac_periph, uint32_t unmask_bits);
/* configure DAC triangle noise mode */
void dac_triangle_noise_config(uint32_t dac_periph, uint32_t amplitude);
/* get the last data output value */
uint16_t dac_output_value_get(uint32_t dac_periph);

/* set DAC data holding register value */
void dac_data_set(uint32_t dac_periph, uint32_t dac_align, uint16_t data);
/* set DAC concurrent mode data holding register value */
void dac_concurrent_data_set(uint32_t dac_align, uint16_t data0, uint16_t data1); 

/* enable DAC concurrent mode */
void dac_concurrent_enable(void);
/* disable DAC concurrent mode */
void dac_concurrent_disable(void);
/* enable DAC concurrent software trigger */
void dac_concurrent_software_trigger_enable(void);
/* disable DAC concurrent software trigger */
void dac_concurrent_software_trigger_disable(void);
/* enable DAC concurrent buffer function */
void dac_concurrent_output_buffer_enable(void);
/* disable DAC concurrent buffer function */
void dac_concurrent_output_buffer_disable(void);
/* enable DAC concurrent interrupt */
void dac_concurrent_interrupt_enable(void);
/* disable DAC concurrent interrupt */
void dac_concurrent_interrupt_disable(void);

/* get the specified DAC flag(DAC DMA underrun flag) */
FlagStatus dac_flag_get(uint32_t dac_periph);
/* clear the specified DAC flag(DAC DMA underrun flag) */
void dac_flag_clear(uint32_t dac_periph);
/* get the specified DAC interrupt flag(DAC DMA underrun interrupt flag) */
FlagStatus dac_interrupt_flag_get(uint32_t dac_periph);
/* clear the specified DAC interrupt flag(DAC DMA underrun interrupt flag) */
void dac_interrupt_flag_clear(uint32_t dac_periph);

#endif /* GD32F4XX_DAC_H */