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/**********************************************************************************************************
*
* 模塊名稱 : da驅動模塊
* 文件名稱 : pcm1770.c
* 版本 : V1.0
* 說明 : 通過iis接口驅動da芯片
*
**********************************************************************************************************/
#include "stm32f10x.h"
#include "codec.h"
#include <rtthread.h>
#define PCM_PD // (1 << 14)//PB14 PD口接到主ic reset腳
#define PCM_PD_SET_L //GPIOB->ODR&=~(PCM_PD) //GPIOB->ODR = (GPIOB->ODR & ~PCM_PD) | (x ? PCM_PD : 0);
#define PCM_PD_SET_H //GPIOB->ODR|=(PCM_PD)
#define PCM_CS (1 << 3)//PC3
#define PCM_CS_SET_L GPIOC->ODR&=~(PCM_CS) //GPIOB->ODR = (GPIOB->ODR & ~PCM_CS) | (x ? PCM_CS : 0);
#define PCM_CS_SET_H GPIOC->ODR|=(PCM_CS)
#define PCM_CLK (1 << 4)//PC4
#define PCM_CLK_SET_L GPIOC->ODR&=~(PCM_CLK) // GPIOB->ODR = (GPIOB->ODR & ~PCM_CLK) | (x ? PCM_CLK : 0);
#define PCM_CLK_SET_H GPIOC->ODR|=(PCM_CLK)
#define PCM_DAT (1 << 5)//PC5
#define PCM_DAT_SET_L GPIOC->ODR&=~(PCM_DAT) //GPIOB->ODR = (GPIOB->ODR & ~PCM_DAT) | (x ? PCM_DAT : 0);
#define PCM_DAT_SET_H GPIOC->ODR|=(PCM_DAT)
vu8 s_Volume;//音量大小
/**
* @brief Delay
* @param Delay Num
* @retval None
*/
void Delay(u32 Num)
{
vu32 Count = Num*2;//*4;
while (--Count);
}
/**
* @brief PCM1770 Init
* @param None
* @retval None
*/
void PCM1770Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//使能控制信號的時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//硬件復位一下
PCM_PD_SET_L;
Delay(500);//
PCM_PD_SET_H;
Delay(10); //
PCM_CS_SET_H ;
PCM_CLK_SET_H;
PCM_DAT_SET_H;
Delay(6); //
PCM_WriteData(0x03, 0x84); //256fs IIS格式 stm32的iis mclk規定為256fs ( 84= 16 right)
PCM_WriteData(0x04, 0x00); //
//PCM1770_VolumeSet(50);
}
/**
* @brief
* @param Reg Index， Data
* @retval None
*/
void PCM_WriteData(const u8 Reg, const u8 Data)
{
vu16 TrasferData, i;
TrasferData = Data;
TrasferData |= (Reg<<8)&0xff00;
PCM_CS_SET_L;//select
Delay(5);
for (i = 0; i < 16; i++)
{//傳輸時MSB first
PCM_CLK_SET_L;
if (TrasferData&(0x8000>>i))
{
PCM_DAT_SET_H;
}
else
{
PCM_DAT_SET_L;
}
Delay(5);//等數據穩定
PCM_CLK_SET_H; //上升沿寫入
Delay(5);//等待從機讀數據
}
PCM_CLK_SET_H;
PCM_DAT_SET_H;
PCM_CS_SET_H;//relase
Delay(5);
}
/**
* @brief Volume_Add
* @param None
* @retval None
*/
void PCM1770_VolumeSet(vu8 vol)
{
s_Volume = vol*63/100;
PCM_WriteData(0x01, s_Volume);
PCM_WriteData(0x02, s_Volume);
//rt_kprintf("Volume = %d\n\r", s_Volume);
}
u8 GetPCM1770_Volume(void)
{
return s_Volume*100/63;
}
void PCM1770_Mute(void)
{
PCM_WriteData(0x01, 0xc0);//
PCM_WriteData(0x02, 0x00);//
}
/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/

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