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/********************************** (C) COPYRIGHT *******************************
* File Name : ch32f20x_dac.c
* Author : WCH
* Version : V1.0.0
* Date : 2021/08/08
* Description : This file provides all the DAC firmware functions.
****************************************************************************************/
#include "ch32f20x_dac.h"
#include "ch32f20x_rcc.h"
/* CTLR register Mask */
#define CTLR_CLEAR_MASK ((uint32_t)0x00000FFE)
/* DAC Dual Channels SWTR masks */
#define DUAL_SWTR_SET ((uint32_t)0x00000003)
#define DUAL_SWTR_RESET ((uint32_t)0xFFFFFFFC)
/* DHR registers offsets */
#define DHR12R1_OFFSET ((uint32_t)0x00000008)
#define DHR12R2_OFFSET ((uint32_t)0x00000014)
#define DHR12RD_OFFSET ((uint32_t)0x00000020)
/* DOR register offset */
#define DOR_OFFSET ((uint32_t)0x0000002C)
/******************************************************************************************
* Function Name : DAC_DeInit
* Description : Deinitializes the DAC peripheral registers to their default reset values.
* Input : None
* Return : None
*******************************************************************************************/
void DAC_DeInit(void)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, DISABLE);
}
/******************************************************************************************
* Function Name : DAC_Init
* Description : Initializes the DAC peripheral according to the specified parameters in
* the DAC_InitStruct.
* Input : DAC_Channel:the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* DAC_InitStruct:pointer to a DAC_InitTypeDef structure.
* Return : None
*******************************************************************************************/
void DAC_Init(uint32_t DAC_Channel, DAC_InitTypeDef* DAC_InitStruct)
{
uint32_t tmpreg1 = 0, tmpreg2 = 0;
tmpreg1 = DAC->CTLR;
tmpreg1 &= ~(CTLR_CLEAR_MASK << DAC_Channel);
tmpreg2 = (DAC_InitStruct->DAC_Trigger | DAC_InitStruct->DAC_WaveGeneration |
DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude | DAC_InitStruct->DAC_OutputBuffer);
tmpreg1 |= tmpreg2 << DAC_Channel;
DAC->CTLR = tmpreg1;
}
/******************************************************************************************
* Function Name : DAC_StructInit
* Description : Fills each DAC_InitStruct member with its default value.
* Input : DAC_InitStruct:pointer to a DAC_InitTypeDef structure which will be initialized.
* Return : None
*******************************************************************************************/
void DAC_StructInit(DAC_InitTypeDef* DAC_InitStruct)
{
DAC_InitStruct->DAC_Trigger = DAC_Trigger_None;
DAC_InitStruct->DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
DAC_InitStruct->DAC_OutputBuffer = DAC_OutputBuffer_Enable;
}
/******************************************************************************************
* Function Name : DAC_Cmd
* Description : Enables or disables the specified DAC channel.
* Input : DAC_Channel: the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* NewState:new state of the DAC channel(ENABLE or DISABLE).
* Return : None
*******************************************************************************************/
void DAC_Cmd(uint32_t DAC_Channel, FunctionalState NewState)
{
if (NewState != DISABLE)
{
DAC->CTLR |= (DAC_EN1 << DAC_Channel);
}
else
{
DAC->CTLR &= ~(DAC_EN1 << DAC_Channel);
}
}
/******************************************************************************************
* Function Name : DAC_DMACmd
* Description : Enables or disables the specified DAC channel DMA request.
* Input : DAC_Channel: the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* NewState:new state of the DAC channel(ENABLE or DISABLE).
* Return : None
*******************************************************************************************/
void DAC_DMACmd(uint32_t DAC_Channel, FunctionalState NewState)
{
if (NewState != DISABLE)
{
DAC->CTLR |= (DAC_DMAEN1 << DAC_Channel);
}
else
{
DAC->CTLR &= ~(DAC_DMAEN1 << DAC_Channel);
}
}
/******************************************************************************************
* Function Name : DAC_SoftwareTriggerCmd
* Description : Enables or disables the selected DAC channel software trigger.
* Input : DAC_Channel: the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* NewState:new state of the DAC channel(ENABLE or DISABLE).
* Return : None
*******************************************************************************************/
void DAC_SoftwareTriggerCmd(uint32_t DAC_Channel, FunctionalState NewState)
{
if (NewState != DISABLE)
{
DAC->SWTR |= (uint32_t)DAC_SWTRIG1 << (DAC_Channel >> 4);
}
else
{
DAC->SWTR &= ~((uint32_t)DAC_SWTRIG1 << (DAC_Channel >> 4));
}
}
/******************************************************************************************
* Function Name : DAC_DualSoftwareTriggerCmd
* Description : Enables or disables the two DAC channel software trigger.
* Input : NewState:new state of the DAC channel(ENABLE or DISABLE).
* Return : None
*******************************************************************************************/
void DAC_DualSoftwareTriggerCmd(FunctionalState NewState)
{
if (NewState != DISABLE)
{
DAC->SWTR |= DUAL_SWTR_SET ;
}
else
{
DAC->SWTR &= DUAL_SWTR_RESET;
}
}
/******************************************************************************************
* Function Name : DAC_WaveGenerationCmd
* Description : Enables or disables the selected DAC channel wave generation.
* Input : DAC_Channel: the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* DAC_Wave: Specifies the wave type to enable or disable.
* DAC_Wave_Noise: noise wave generation
* DAC_Wave_Triangle: triangle wave generation
* NewState:new state of the DAC channel(ENABLE or DISABLE).
* Return : None
*******************************************************************************************/
void DAC_WaveGenerationCmd(uint32_t DAC_Channel, uint32_t DAC_Wave, FunctionalState NewState)
{
if (NewState != DISABLE)
{
DAC->CTLR |= DAC_Wave << DAC_Channel;
}
else
{
DAC->CTLR &= ~(DAC_Wave << DAC_Channel);
}
}
/******************************************************************************************
* Function Name : DAC_SetChannel1Data
* Description : Set the specified data holding register value for DAC channel1.
* Input : DAC_Align: Specifies the data alignment for DAC channel1.
* DAC_Align_8b_R: 8bit right data alignment selected
* DAC_Align_12b_L: 12bit left data alignment selected
* DAC_Align_12b_R: 12bit right data alignment selected
* Data : Data to be loaded in the selected data holding register.
* Return : None
*******************************************************************************************/
void DAC_SetChannel1Data(uint32_t DAC_Align, uint16_t Data)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t)DAC_BASE;
tmp += DHR12R1_OFFSET + DAC_Align;
*(__IO uint32_t *) tmp = Data;
}
/******************************************************************************************
* Function Name : DAC_SetChannel2Data
* Description : Set the specified data holding register value for DAC channel2.
* Input : DAC_Align: Specifies the data alignment for DAC channel1.
* DAC_Align_8b_R: 8bit right data alignment selected
* DAC_Align_12b_L: 12bit left data alignment selected
* DAC_Align_12b_R: 12bit right data alignment selected
* Data : Data to be loaded in the selected data holding register.
* Return : None
*******************************************************************************************/
void DAC_SetChannel2Data(uint32_t DAC_Align, uint16_t Data)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t)DAC_BASE;
tmp += DHR12R2_OFFSET + DAC_Align;
*(__IO uint32_t *)tmp = Data;
}
/******************************************************************************************
* Function Name : DAC_SetDualChannelData
* Description : Set the specified data holding register value for two DAC.
* Input : DAC_Align: Specifies the data alignment for DAC channel1.
* DAC_Align_8b_R: 8bit right data alignment selected
* DAC_Align_12b_L: 12bit left data alignment selected
* DAC_Align_12b_R: 12bit right data alignment selected
* Data1 : Data for DAC Channel1.
* Data2 : Data for DAC Channel2
* Return : None
*******************************************************************************************/
void DAC_SetDualChannelData(uint32_t DAC_Align, uint16_t Data2, uint16_t Data1)
{
uint32_t data = 0, tmp = 0;
if (DAC_Align == DAC_Align_8b_R)
{
data = ((uint32_t)Data2 << 8) | Data1;
}
else
{
data = ((uint32_t)Data2 << 16) | Data1;
}
tmp = (uint32_t)DAC_BASE;
tmp += DHR12RD_OFFSET + DAC_Align;
*(__IO uint32_t *)tmp = data;
}
/******************************************************************************************
* Function Name : DAC_GetDataOutputValue
* Description : Returns the last data output value of the selected DAC channel.
* Input : DAC_Channel: the selected DAC channel.
* DAC_Channel_1: DAC Channel1 selected
* DAC_Channel_2: DAC Channel2 selected
* Return : None
*******************************************************************************************/
uint16_t DAC_GetDataOutputValue(uint32_t DAC_Channel)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t) DAC_BASE ;
tmp += DOR_OFFSET + ((uint32_t)DAC_Channel >> 2);
return (uint16_t) (*(__IO uint32_t*) tmp);
}
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