stm32f103c8t6通过SPI2调用ld3320实现语音识别

硬件连接

采用SPI2连接。

VCC 3.3V

GND 地线

RST PB11

CS PB8

WR/SPIS PB12

P2/SDCK PB13

P1/SDO PB14

P0/SDI PB15

IRQ PB9

stm32F103C8T6设置

芯片时钟频率设置为12Mhz。

stm32f103c8t6通过SPI2调用ld3320实现语音识别

核心代码

（1）、ld3320模块io口配置

void LD3320_GPIO_Cfg(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB ,ENABLE);

//LD_CS /RSET

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_8|GPIO_Pin_11;//;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOB,&GPIO_InitStructure);

}

（2）、ld3320模块io口配置

void LD3320_Spi_cfg(void)

{

SPI_InitTypeDef SPI_InitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

//spi端口配置

RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 | RCC_APB2Periph_GPIOB,ENABLE); //使能SPI2外设时钟

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);

//P13/P14/P15

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15 | GPIO_Pin_14 | GPIO_Pin_13;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //spis 片选 WR

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOB, &GPIO_InitStructure);

LD_CS_H();

//spi功能配置

SPI_Cmd(SPI2, DISABLE);

/* SPI2 配置 */

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //全双工

SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //主模式

SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //8位

SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //时钟极性空闲状态时，SCK保持低电平

SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //时钟相位数据采样从第一个时钟边沿开始

SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //软件产生NSS

SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128; //波特率控制 SYSCLK/128

SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //数据高位在前

SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC多项式寄存器初始值为7

SPI_Init(SPI2, &SPI_InitStructure);

/* 使能SPI2 */

SPI_Cmd(SPI2, ENABLE);

}

（3）、ld3320时钟输入值配置

#define CLK_IN 22 /* user need modify this value according to clock in */

（4）、ld3320中断配置代码

void LD3320_EXTI_Cfg(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

//中断引脚配置

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);

//外部中断线配置

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource9);

EXTI_InitStructure.EXTI_Line = EXTI_Line9;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger =EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

EXTI_GenerateSWInterrupt(EXTI_Line9);

GPIO_SetBits(GPIOB,GPIO_Pin_9); //默认拉高中断引脚

EXTI_ClearFlag(EXTI_Line9);

EXTI_ClearITPendingBit(EXTI_Line9);

//中断嵌套配置

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

因为PB9中断引脚在5-9范围内，因此中断通道名称是EXTI9_5_IRQn。注意不是EXTI5_9_IRQn。

（4）、ld3320中断函数代码

void EXTI9_5_IRQHandler(void)

{

if(EXTI_GetITStatus(EXTI_Line9)!= RESET )

{

ProcessInt0();

PrintCom(USART1,"进入中断\r\n"); /*text........................*/

EXTI_ClearFlag(EXTI_Line9);

EXTI_ClearITPendingBit(EXTI_Line9);

}

函数名为EXTI9_5_IRQHandler。

（4）、ld3320引脚宏代码

#define LD_RST_H() GPIO_SetBits(GPIOB, GPIO_Pin_11)

#define LD_RST_L() GPIO_ResetBits(GPIOB, GPIO_Pin_11)

#define LD_CS_H() GPIO_SetBits(GPIOB, GPIO_Pin_8)

#define LD_CS_L() GPIO_ResetBits(GPIOB, GPIO_Pin_8)

#define LD_SPIS_H() GPIO_SetBits(GPIOB, GPIO_Pin_12)

#define LD_SPIS_L() GPIO_ResetBits(GPIOB, GPIO_Pin_12)

因为在LD3320里多处要操作这些引脚的电平，因此统一用宏来处理。

（5）、ld3320主函数代码

void LD3320_main(void)

{

uint8 nAsrRes=0;

LD3320_Init();

PrintCom(USART1," 串口运行中....\r\n"); /*text.....*/

PrintCom(USART1,"口令：1、流水灯右移\r\n"); /*text.....*/

PrintCom(USART1,"2、闪烁\r\n"); /*text.....*/

PrintCom(USART1,"3、流水灯左移\r\n"); /*text.....*/

PrintCom(USART1,"4、全灭\r\n"); /*text.....*/

nAsrStatus = LD_ASR_NONE; // 初始状态：没有在作ASR

while(1)

{

switch(nAsrStatus)

{

case LD_ASR_RUNING:

case LD_ASR_ERROR:

break;

case LD_ASR_NONE:

nAsrStatus=LD_ASR_RUNING;

if (RunASR()==0) // 启动一次ASR识别流程：ASR初始化，ASR添加关键词语，启动ASR运算

{

nAsrStatus = LD_ASR_ERROR;

}

break;

case LD_ASR_FOUNDOK:

nAsrRes = LD_GetResult( );//一次ASR识别流程结束，取ASR识别结果

PrintCom(USART1,"\r\n识别码:"); /*text.....*/

USART_SendData(USART1,nAsrRes+0x30); /*text.....*/

switch(nAsrRes) /*对结果执行相关操作,客户修改*/

{

case CODE_LSDYY: /*命令“打开”*/ PrintCom(USART1,"“流水灯右移”命令识别成功\r\n"); /*text.....*/

Glide_LED_Right(); //实现流水灯右移功能

break;

case CODE_SS: /*命令“闪烁”*/ PrintCom(USART1,"“闪烁”命令识别成功\r\n"); /*text.....*/

Flicker_LED(); //实现灯闪烁功能 break;

case CODE_LSDZY: /*命令“流水灯左移”*/ PrintCom(USART1,"“流水灯左移”命令识别成功\r\n"); /*text.....*/

Glide_LED_Left(); //实现流水灯左移功能 break;

case CODE_QM: /*命令“全灭”*/ PrintCom(USART1,"“全灭”命令识别成功\r\n"); /*text.....*/

Off_LED(); //关闭全部LED break;

default:break;

}

nAsrStatus = LD_ASR_NONE;

break;

case LD_ASR_FOUNDZERO:

default:

nAsrStatus = LD_ASR_NONE;

break;

}//switch

//开发板测试延时部分（用户可删除）

Board_text(nAsrRes ); /*text....................*/

}// while

}

完整代码，请加QQ（395702361）索取。

stm32f103c8t6通过SPI2调用ld3320实现语音识别

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