void iic_control (unsigned char addr, unsigned char loc, unsigned char *buf, int len)
{
iic_start();
if (iic_sendbyte(addr & 0xfe))
goto error;
if (iic_sendbyte(loc))
goto error;
if (addr & 1) {
int i;
for (i = 0; i < len; i++)
if (iic_sendbyte (buf[i]))
break;
} else {
int i;
iic_stop();
iic_start();
iic_sendbyte(addr|1);
for (i = 0; i < len; i++)
buf[i] = iic_recvbyte ();
}
error:
iic_stop();
}
/*----------------------------------------------------------------------------*/
void iic_write(u8 chip_id,u8 iic_addr,u8 *iic_dat,u8 n)
{
iic_busy = 1;
iic_start(); //I2C启动
iic_sendbyte(chip_id); //写命令
if (0xff != iic_addr)
{
iic_sendbyte(iic_addr); //写地址
}
for (;n>0;n--)
{
iic_sendbyte(*iic_dat++); //写数据
}
iic_stop(); //I2C停止时序
iic_busy = 0;
}
/*----------------------------------------------------------------------------*/
void iic_readn(u8 chip_id,u8 iic_addr,u8 *iic_dat,u8 n)
{
iic_busy = 1;
iic_start(); //I2C启动
iic_sendbyte(chip_id); //写命令
if (0xff != iic_addr)
{
iic_sendbyte(iic_addr); //写地址
}
for (;n>1;n--)
{
*iic_dat++ = iic_revbyte(0); //写数据
}
*iic_dat++ = iic_revbyte(1);
iic_stop(); //I2C停止时序
iic_busy = 0;
}
/*----------------------------------------------------------------------------*/
u8 read_eerom(u16 iic_addr)
{
u8 byte,addr=0,page=0;
iic_busy = 1;
addr=EEPROM_Addr_Align(iic_addr);
page =EEPROM_Addr_to_Page(iic_addr);
iic_start(); //I2C启动
iic_sendbyte(0xa0|page); //写命令
iic_sendbyte(addr); //写地址
iic_start(); //写转为读命令，需要再次启动I2C
iic_sendbyte(0xa1|page); //读命令
byte = iic_revbyte(1);
iic_stop(); //I2C停止
iic_busy = 0;
return byte;
}
/*----------------------------------------------------------------------------*/
void backup_music_point_to_eeprom(void)
{
u8 cnt,i;
eeprom_page_write_start();
if (device_active == DEVICE_SDMMC0)
{
cnt = 0;
iic_sendbyte(MEM_SD_PLAYPOINT_ID1);
}
else if (device_active == DEVICE_UDISK)
{
cnt = 1;
iic_sendbyte(MEM_USB_PLAYPOINT_ID1);
}
for ( i = 0;i<8;i++)
{
iic_sendbyte(((u8 *)(&(disk_mus_point[cnt].id1)))[i]);
}
eeprom_page_write_stop();
}
void eeprom_page_write_start(void)
{
iic_busy = 1;
iic_start(); //I2C启动
iic_sendbyte(0xa0); //写命令
}
