HC32F460之adc+dma使用
时间：2023-05-18 01:07:00
ADC简介
???ADC 它是将模拟信号转换为数字信号的电路，为模数转换器。
???我现在用的ADC12位，12位ADC模拟量范围为2^12也就是4096，也就是说我的12位ADC模拟量的范围为0~4096.
具体实现
.h头文件编写
#include "hc32_ddl.h" //Pin角定义 #define BOARD_ADC_CH0_PORT (PortC) #define BOARD_ADC_CH0_PIN (Pin03) #define BOARD_ADC_CH0_CH (ADC1_CH13) #define BOARD_ADC_CH1_PORT (PortC) #define BOARD_ADC_CH1_PIN (Pin01) #define BOARD_ADC_CH1_CH (ADC1_CH11) #define BOARD_ADC_CH2_PORT (PortC) #define BOARD_ADC_CH2_PIN (Pin02) #define BOARD_ADC_CH2_CH (ADC1_CH12) extern void adc_init(void); extern uint16_t adc_value[3]; c文件编写
#include "bsp_adc.h" #include "bsp_irq.h" #define ADC_CH_COUNT 3 //adc收集通道数量 uint16_t adc_value[3]; //存储采集数值buf static void adc_pin_init(void); //ADC init pin static void AdcClockConfig(void); //ADC intit clk static void AdcInitConfig(void); //ADC initial configuration. static void AdcChannelConfig(void); //ADC channel configuration. static void AdcTriggerConfig(void); //ADC trigger source configuration. static void
adc_dma_config
(
void
)
;
//ADC config DMA
void
adc_init
(
void
)
{
AdcInitConfig
(
)
;
adc_pin_init
(
)
;
AdcChannelConfig
(
)
;
AdcTriggerConfig
(
)
;
adc_dma_config
(
)
;
ADC_StartConvert
(M4_ADC1
)
;
}
static
void
adc_pin_init
(
void
)
{
stc_port_init_t stcPortInit
;
MEM_ZERO_STRUCT
(stcPortInit
)
; stcPortInit
.enPullUp
= Disable
; stcPortInit
.enPinMode
= Pin_Mode_Ana
;
PORT_Init
(BOARD_ADC_CH0_PORT
, BOARD_ADC_CH0_PIN
,
&stcPortInit
)
;
PORT_Init
(BOARD_ADC_CH1_PORT
, BOARD_ADC_CH1_PIN
,
&stcPortInit
)
;
PORT_Init
(BOARD_ADC_CH2_PORT
, BOARD_ADC_CH2_PIN
,
&stcPortInit
)
;
}
/** ******************************************************************************* ** \brief ADC clock configuration. ** ** \note 1) ADCLK max frequency is 60MHz. ** 2) If PCLK2 and PCLK4 are selected as the ADC clock, ** the following conditions must be met: ** a. ADCLK(PCLK2) max 60MHz; ** b. PCLK4 : ADCLK = 1:1, 2:1, 4:1, 8:1, 1:2, 1:4 ** ******************************************************************************/
static
void
AdcClockConfig
(
void
)
{
#if (ADC_CLK == ADC_CLK_PCLK) stc_clk_sysclk_cfg_t stcSysclkCfg
;
/* Set bus clock division, depends on the system clock frequency. */ stcSysclkCfg
.enHclkDiv
= ClkSysclkDiv1
;
// 168MHz stcSysclkCfg
.enExclkDiv
= ClkSysclkDiv2
;
// 84MHz stcSysclkCfg
.enPclk0Div
= ClkSysclkDiv1
;
// 168MHz stcSysclkCfg
.enPclk1Div
= ClkSysclkDiv2
;
// 84MHz stcSysclkCfg
.enPclk2Div
= ClkSysclkDiv4
;
// 42MHz stcSysclkCfg
.enPclk3Div
= ClkSysclkDiv4
;
// 42MHz stcSysclkCfg
.enPclk4Div
= ClkSysclkDiv1
;
// 84MHz.
CLK_SysClkConfig
(
&stcSysclkCfg
)
;
CLK_SetPeriClkSource
(ClkPeriSrcPclk
)
;
#elif (ADC_CLK == ADC_CLK_MPLLQ) stc_clk_xtal_cfg_t stcXtalCfg
; stc_clk_mpll_cfg_t stcMpllCfg
;
if
(CLKSysSrcMPLL
==
CLK_GetSysClkSource
(
)
)
{
/* * Configure MPLLQ(same as MPLLP and MPLLR) when you * configure MPLL as the system clock. */
}
else
{
/* Use XTAL as MPLL source. */ stcXtalCfg
.enFastStartup
= Enable
; stcXtalCfg
.enMode
= ClkXtalModeOsc
; stcXtalCfg
.enDrv
= ClkXtalLowDrv
;
CLK_XtalConfig
(
&stcXtalCfg
)
;
CLK_XtalCmd
(Enable
)
;
/* Set MPLL out 240MHz. */ stcMpllCfg
.pllmDiv
=
1u
;
/* mpll = 8M / pllmDiv * plln */ stcMpllCfg
.plln
=
30u
; stcMpllCfg
.PllpDiv
=
16u
; stcMpllCfg
.PllqDiv
=
16u
; stcMpllCfg
.PllrDiv
=
16u
;
CLK_SetPllSource
(ClkPllSrcXTAL
)
;
CLK_MpllConfig
(
&stcMpllCfg
)
;
CLK_MpllCmd
(Enable
)
;
}
CLK_SetPeriClkSource
(ClkPeriSrcMpllp
)
;
#elif (ADC_CLK == ADC_CLK_UPLLR) stc_clk_xtal_cfg_t stcXtalCfg
; stc_clk_upll_cfg_t stcUpllCfg
;
MEM_ZERO_STRUCT
(stcXtalCfg
)
;
MEM_ZERO_STRUCT
(stcUpllCfg
)
;
/* Use XTAL as UPLL source. */ stcXtalCfg
.enFastStartup
= Enable
; stcXtalCfg
.enMode
= ClkXtalModeOsc
; stcXtalCfg
.enDrv
= ClkXtalLowDrv
;
CLK_XtalConfig
(
&stcXtalCfg
)
;
CLK_XtalCmd
(Enable
)
;
/* Set UPLL out 240MHz. */ stcUpllCfg
.pllmDiv
=
2u
;
/* upll = 8M(XTAL) / pllmDiv * plln */ stcUpllCfg
.plln
=
60u
; stcUpllCfg
.PllpDiv
=
16u
; stcUpllCfg
.PllqDiv
=
16u
; stcUpllCfg
.PllrDiv
=
16u
;
CLK_SetPllSource
(ClkPllSrcXTAL
)
;
CLK_UpllConfig
(
&stcUpllCfg
)
;
CLK_UpllCmd
(Enable
)
;
CLK_SetPeriClkSource
(ClkPeriSrcUpllr
)
;
#endif
}
/** ******************************************************************************* ** \brief ADC initial configuration. ** ******************************************************************************/
static
void
AdcInitConfig
(
void
)
{
stc_adc_init_t stcAdcInit
;
MEM_ZERO_STRUCT
(stcAdcInit
)
; stcAdcInit
.enResolution
= AdcResolution_12Bit
; stcAdcInit
.enDataAlign
= AdcDataAlign_Right
; stcAdcInit
.enAutoClear
= AdcClren_Enable
; stcAdcInit
.enScanMode
= AdcMode_SAContinuous
; stcAdcInit
.enRschsel
= AdcRschsel_Restart
;
/* 1. Enable ADC1. */
PWC_Fcg3PeriphClockCmd
(PWC_FCG3_PERIPH_ADC1
, Enable
)
;
/* 2. Initialize ADC1. */
ADC_Init
(M4_ADC1
,
&stcAdcInit
)
;
}
/** ******************************************************************************* ** \brief ADC channel configuration. ** ******************************************************************************/
static
void
AdcChannelConfig
(
void
)
{
stc_adc_ch_cfg_t stcChCfg
; uint8_t au8Adc1SaSampTime
[
3
]
=
{
0x60
,
0x60
,
0x60
}
;
MEM_ZERO_STRUCT
(stcChCfg
)
; stcChCfg
.u32Channel
= BOARD_ADC_CH0_CH
| BOARD_ADC_CH1_CH
| BOARD_ADC_CH2_CH
; stcChCfg
.u8Sequence
= ADC_SEQ_A
; stcChCfg
.pu8SampTime
= au8Adc1SaSampTime
;
ADC_AddAdcChannel
(M4_ADC1
,
&stcChCfg
)
;
// ADC_ConfigAvg(M4_ADC1, AdcAvcnt_64);
// ADC_AddAvgChannel(M4_ADC1, BOARD_ADC_CH0_CH | BOARD_ADC_CH1_CH | BOARD_ADC_CH2_CH);
}
/** ******************************************************************************* ** \brief ADC trigger source configuration. ** ******************************************************************************/
static
void
AdcTriggerConfig
(
void
)
{
stc_adc_trg_cfg_t stcTrgCfg
;
MEM_ZERO_STRUCT
(stcTrgCfg
)
;
/* * If select an event(@ref en_event_src_t) to trigger ADC, * AOS must be enabled first. */
PWC_Fcg0PeriphClockCmd
(PWC_FCG0_PERIPH_AOS
, Enable
)
;
/* ADC1 sequence A will be started by software. */
ADC_TriggerSrcCmd
(M4_ADC1
, ADC_SEQ_A
, Disable
)
;
}
/** ******************************************************************************* ** \brief Config the pin which is mapping the channel to analog or digit mode. ** ******************************************************************************/
static
void
AdcSetChannelPinMode
(
const M4_ADC_TypeDef
*ADCx
, uint32_t u32Channel
, en_pin_mode_t enMode
)
{
uint8_t u8ChIndex
;
#if (ADC_CH_REMAP) uint8_t u8AdcPin
;
#else uint8_t u8ChOffset
=
0u
;
#endif
if
(M4_ADC1
== ADCx
)
{
u32Channel
&
= ADC1_PIN_MASK_ALL
;
}
else
{
u32Channel
&
= ADC2_PIN_MASK_ALL
;
#if (!ADC_CH_REMAP) u8ChOffset
=
4u
;
#endif
} u8ChIndex
=
0u
;
while
(
0u
!= u32Channel
)
{
if
(u32Channel
&
0x1ul
)
{
#if (ADC_CH_REMAP) u8AdcPin
=
ADC_GetChannelPinNum
(ADCx
, u8ChIndex
)
;
AdcSetPinMode
(u8AdcPin
, enMode
)
;
#else
AdcSetPinMode
(
(u8ChIndex
+ u8ChOffset
)
, enMode
)
;
#endif
} u32Channel
>>=
1u
; u8ChIndex
++
;
}
}
/** ******************************************************************************* ** \brief Set an ADC pin as analog input mode or digit mode. ** ******************************************************************************/
static
void
AdcSetPinMode
(uint8_t u8AdcPin
, en_pin_mode_t enMode
)
{
en_port_t enPort
= PortA
; en_pin_t enPin
= Pin00
; bool bFlag
= true
; stc_port_init_t stcPortInit
;
MEM_ZERO_STRUCT
(stcPortInit
)
; stcPortInit
.enPinMode
= enMode
; stcPortInit
.enPullUp
= Disable
;
switch
(u8AdcPin
)
{
case ADC1_IN0
: enPort
= PortA
; enPin
= Pin00
;
break
;
case ADC1_IN1
: enPort
= PortA
; enPin
= Pin01
;
break
;
case ADC1_IN2
: enPort
= PortA
; enPin
= Pin02
;
break
;
case ADC1_IN3
: enPort
= PortA
; enPin
= Pin03
;
break
;
case ADC12_IN4
: enPort
= PortA
; enPin
= Pin04
;
break
;
case ADC12_IN5
: enPort
= PortA
; enPin
= Pin05
;
break
;
case ADC12_IN6
: enPort
= PortA
; enPin
= Pin06
;
break
;
case ADC12_IN7
: enPort
= PortA
; enPin
= Pin07
;
break
;
case ADC12_IN8
: enPort
= PortB
; enPin
= Pin00
;
break
;
case ADC12_IN9
: enPort
= PortB
; enPin
= Pin01
;
break
;
case ADC12_IN10
: enPort
= PortC
; enPin
= Pin00
;
break
;
case ADC12_IN11
: enPort
= PortC
; enPin
= Pin01
;
break
;
case ADC1_IN12
: enPort
= PortC
; enPin
= Pin02
;
break
;
case ADC1_IN13
: enPort
= PortC
; enPin
= Pin03
;
break
;
case ADC1_IN14
: enPort
= PortC
; enPin
= Pin04
;
break
;
case ADC1_IN15
: enPort
= PortC
; enPin
= Pin05
;
break
;
default
: bFlag
= false
;
break
;
}
if
(true
== bFlag
)
{
PORT_Init
(enPort
, enPin
,
&stcPortInit
)
;
}
}
// DMA2 CH0 ~ CH2
static
void
adc_dma_config
(
void
)
{
stc_dma_config_t stcDmaCfg
;
MEM_ZERO_STRUCT
(stcDmaCfg
)
; stcDmaCfg
.u16BlockSize
= ADC_CH_COUNT
; stcDmaCfg
.u16TransferCnt
=
0u
; stcDmaCfg
.u32SrcAddr
=
(uint32_t
)
(
&M4_ADC1
->DR11
)
; stcDmaCfg
.u32DesAddr
=
(uint32_t
)
(
&adc_value
[
0
]
)
; stcDmaCfg
.u16DesRptSize
= ADC_CH_COUNT
; stcDmaCfg
.u16SrcRptSize
= ADC_CH_COUNT
; stcDmaCfg
.u32DmaLlp
=
0u
; stcDmaCfg
.stcSrcNseqCfg
.u16Cnt
=
0u
; stcDmaCfg
.stcSrcNseqCfg
.u32Offset
=
0u
; stcDmaCfg
.stcDesNseqCfg
.u16Cnt
=
0u
; stcDmaCfg
.stcDesNseqCfg
.u32Offset
=
0u
; stcDmaCfg
.stcDmaChCfg
.enSrcInc
= AddressIncrease
; stcDmaCfg
.stcDmaChCfg
.enDesInc
= AddressIncrease
; stcDmaCfg
.stcDmaChCfg
.enSrcRptEn
= Enable
; stcDmaCfg
.stcDmaChCfg
.enDesRptEn
= Enable
; stcDmaCfg
.stcDmaChCfg
.enSrcNseqEn
= Disable
; stcDmaCfg
.stcDmaChCfg
.enDesNseqEn
= Disable
; stcDmaCfg
.stcDmaChCfg
.enTrnWidth
= Dma16Bit
; stcDmaCfg
.stcDmaChCfg
.enLlpEn
= Disable
; stcDmaCfg
.stcDmaChCfg
.enIntEn
= Disable
;
PWC_Fcg0PeriphClockCmd
(PWC_FCG0_PERIPH_DMA2
, Enable
)
;
DMA_InitChannel
(M4_DMA2
, DmaCh3
,
&stcDmaCfg
)
;
DMA_Cmd
(M4_DMA2
, Enable
)
;
DMA_ChannelCmd
(M4_DMA2
, DmaCh3
, Enable
)
;
DMA_ClearIrqFlag
(M4_DMA2
, DmaCh3
, TrnCpltIrq
)
;
/* AOS must be enabled to use DMA */
/* AOS enabled at first. */
/* If you have enabled AOS before, then the following statement is not needed. */
PWC_Fcg0PeriphClockCmd
(PWC_FCG0_PERIPH_AOS
, Enable
)
;
DMA_SetTriggerSrc
(M4_DMA2
, DmaCh3
, EVT_ADC1_EOCA
)
;
}
具体使用
int main()
{
// ..... //init other config
adc_init(); //init adc
while(1)
{
//deal adc value (adc_value)
}
}
