使用stm32实现vs1003初始化
时间: 2024-06-09 11:07:02 浏览: 18
VS1003是一款高质量的多格式音频解码器,可以用于音频播放等应用。在STM32上实现VS1003的初始化需要进行以下步骤:
1. 配置STM32的SPI接口,使其可以与VS1003进行通信。
2. 设置STM32的GPIO口,控制VS1003的各个引脚。
3. 构建VS1003的初始化序列,并将其发送给VS1003。
下面是一个简单的VS1003初始化代码示例,仅供参考:
```c
#include "stm32f10x.h"
#include "vs1003.h"
void VS1003_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
// 配置GPIO口
RCC_APB2PeriphClockCmd(VS1003_CS_RCC | VS1003_DREQ_RCC | VS1003_RST_RCC, ENABLE);
GPIO_InitStructure.GPIO_Pin = VS1003_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(VS1003_CS_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = VS1003_DREQ_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(VS1003_DREQ_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = VS1003_RST_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(VS1003_RST_PORT, &GPIO_InitStructure);
// 配置SPI接口
RCC_APB2PeriphClockCmd(VS1003_SPI_RCC, ENABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(VS1003_SPI, &SPI_InitStructure);
SPI_Cmd(VS1003_SPI, ENABLE);
// 发送初始化序列
VS1003_Reset();
VS1003_WriteReg(SCI_MODE, SM_SDINEW | SM_RESET);
VS1003_WriteReg(SCI_CLOCKF, 0x9800);
VS1003_WriteReg(SCI_AUDATA, 44100);
VS1003_WriteReg(SCI_VOL, 0x2020);
VS1003_WriteReg(SCI_BASS, 0x0000);
}
void VS1003_Reset(void)
{
GPIO_ResetBits(VS1003_RST_PORT, VS1003_RST_PIN);
Delay(10);
GPIO_SetBits(VS1003_RST_PORT, VS1003_RST_PIN);
Delay(10);
}
void VS1003_WriteReg(uint8_t addr, uint16_t data)
{
while (!GPIO_ReadInputDataBit(VS1003_DREQ_PORT, VS1003_DREQ_PIN));
GPIO_ResetBits(VS1003_CS_PORT, VS1003_CS_PIN);
VS1003_SPI_SendByte(VS1003_SPI, VS1003_WRITE_COMMAND);
VS1003_SPI_SendByte(VS1003_SPI, addr);
VS1003_SPI_SendByte(VS1003_SPI, (data >> 8) & 0xff);
VS1003_SPI_SendByte(VS1003_SPI, data & 0xff);
GPIO_SetBits(VS1003_CS_PORT, VS1003_CS_PIN);
}
uint16_t VS1003_ReadReg(uint8_t addr)
{
while (!GPIO_ReadInputDataBit(VS1003_DREQ_PORT, VS1003_DREQ_PIN));
GPIO_ResetBits(VS1003_CS_PORT, VS1003_CS_PIN);
VS1003_SPI_SendByte(VS1003_SPI, VS1003_READ_COMMAND);
VS1003_SPI_SendByte(VS1003_SPI, addr);
uint16_t data = (VS1003_SPI_SendByte(VS1003_SPI, 0) << 8) | VS1003_SPI_SendByte(VS1003_SPI, 0);
GPIO_SetBits(VS1003_CS_PORT, VS1003_CS_PIN);
return data;
}
uint8_t VS1003_SPI_SendByte(SPI_TypeDef* SPIx, uint8_t byte)
{
while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPIx, byte);
while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET);
return SPI_I2S_ReceiveData(SPIx);
}
void Delay(uint32_t nCount)
{
for (; nCount != 0; nCount--);
}
```
在上面的代码中,我们使用了STM32的GPIO口和SPI接口与VS1003进行通信,并实现了VS1003的初始化序列。需要注意的是,具体的GPIO口和SPI接口需要根据自己的硬件配置进行调整。