static unsigned char iic_recvbyte (void)
{
unsigned char out, in;
int i;
out = (inb(IOC_CONTROL) & 0xfc) | 0xc0;
outb(out, IOC_CONTROL);
in = 0;
for (i = 7; i >= 0; i--) {
outb(out | 1, IOC_CONTROL);
iic_delay();
outb(out | 3, IOC_CONTROL);
iic_delay();
in = (in << 1) | (inb(IOC_CONTROL) & 1);
outb(out | 1, IOC_CONTROL);
iic_delay();
}
outb(out, IOC_CONTROL);
iic_delay();
outb(out | 2, IOC_CONTROL);
iic_delay();
return in;
}
static u8_t iic_recv_ack(void)
{
u8_t ret = 0;
u8_t i;
iic_sda_dir(0);
iic_set_scl(0);
iic_delay(20);
iic_set_scl(1);
iic_delay(20);
for(i = 0; i < 5; i++)
{
if(! iic_get_sda())
{
ret = 1;
break;
}
}
iic_delay(10);
iic_set_scl(0);
iic_delay(10);
iic_set_sda(1);
iic_sda_dir(1);
return ret;
}
void LCD_SendByte(Uint16 dat) //
{
Uint16 i=0;
EALLOW;
GpioMuxRegs.GPBDIR.bit.GPIOB7=1;//shuchu
EDIS;
for(i=0;i<8;i++)
{
SCL_LCD_0;
iic_delay();
if( dat & 0x0080 )
{
SDL_LCD_1;
}
else
{
SDL_LCD_0;
}
SCL_LCD_1;
iic_delay();
dat <<= 1;
SCL_LCD_0;
}
}
/*******************************************************************************
* 函数名称: dru_iic_8873_read_byte
* 功 能: 8873 的iic 读单个字节
* 参 数:
* 参数名称 类型 描述
*data unsigned char * 存储8873 iic所读数据的地址
* 返回值:
* 无
* 说 明:
* 日 期 版本 作者 修改人 DEBUG
* -----------------------------------------------------------------
* 2012/07/04 V1.0 H4 无 ：
*******************************************************************************/
void dru_iic_8873_read_byte(unsigned char *data)
{
unsigned char index=0;
unsigned char tmp_data=0;
unsigned int level=0;
DRU_ICC_8873_SDA_DIR_IN();
iic_delay(IIC_DELAY_TIME);
for(index=0;index<8;index++)
{
DRU_ICC_8873_SCL_OUT_HIGH();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SDA_IN(level);
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_LOW();
iic_delay(2*IIC_DELAY_TIME);
//printf("level=%x\n",level);
if(level){
tmp_data|=(unsigned char)(1<<(7-index));
}
}
*data=tmp_data;
//printf("read iic=%x\n",tmp_data);
DRU_ICC_8873_SDA_DIR_OUT();
iic_delay(2*IIC_DELAY_TIME);
return;
}
/*******************************************************************************
* 函数名称: dru_iic_8873_noack
* 功 能: 8873 的
* 参 数:
* 参数名称 类型 描述
*
* 返回值:
* 无
* 说 明:
* 日 期 版本 作者 修改人 DEBUG
* -----------------------------------------------------------------
* 2012/07/04 V1.0 H4 无 ：
*******************************************************************************/
void dru_iic_8873_noack(void)
{
DRU_ICC_8873_SDA_OUT_HIGH();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_HIGH();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_LOW();
iic_delay(IIC_DELAY_TIME);
}
/*----------------------------------------------------------------------------*/
void iic_start(void)
{
iic_init_io();
iic_delay();
iic_data_l();
iic_delay();
iic_clk_l();
iic_delay();
iic_data_h();
}
static void iic_stop(void)
{
iic_set_scl(0);
iic_set_sda(0);
iic_delay(5);
iic_set_scl(1);
iic_delay(10);
iic_set_sda(1);
iic_delay(10);
}
static void i2csoft_sendstop(YWGPIO_Handle_T SCL, YWGPIO_Handle_T SDA)
{
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(2);
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_OUTPUT);
YWGPIO_Write(SDA, 0); //I2C_SDA(0);
iic_delay(1);
YWGPIO_Write(SCL, 1); //I2C_SCL(1);
iic_delay(5);
YWGPIO_Write(SDA, 1); //I2C_SDA(1);
iic_delay(4);
}
static void iic_send_ack(void)
{
iic_set_sda(0);
iic_delay(10);
iic_set_scl(0);
iic_delay(10);
iic_set_scl(1);
iic_delay(30);
iic_set_scl(0);
iic_delay(20);
}
static inline void iic_stop (void)
{
unsigned char out;
out = inb(IOC_CONTROL) | 0xc3;
iic_delay();
outb(out ^ 1, IOC_CONTROL);
iic_delay();
outb(out, IOC_CONTROL);
}
/*----------------------------------------------------------------------------*/
void iic_stop(void)
{
iic_data_out();
iic_data_l();
iic_delay();
iic_clk_h();
iic_delay();
iic_data_h();
iic_delay();
iic_data_l();
iic_clk_l();
}
/*----------------------------------------------------------------------------*/
void s_ack(u8 flag)
{
iic_data_out();
iic_clk_l();
if (flag)
{
iic_data_h();
}
else
{
iic_data_l();
}
iic_delay();
iic_clk_h();
iic_delay();
iic_clk_l();
}
static u8_t iic_send_byte(u8_t c)
{
u8_t i;
for(i = 0; i < 8; i++)
{
iic_set_scl(0);
iic_delay(10);
iic_set_sda((c & (0x80 >> i)) ? 1 : 0);
iic_delay(10);
iic_set_scl(1);
iic_delay(30);
iic_set_scl(0);
iic_delay(10);
}
return iic_recv_ack();
}
/*******************************************************************************
* 函数名称: dru_iic_8873_ack
* 功 能: 8873 的iic ack
* 参 数:
* 参数名称 类型 描述
*
* 返回值:
* 无
* 说 明:
* 日 期 版本 作者 修改人 DEBUG
* -----------------------------------------------------------------
* 2012/07/04 V1.0 H4 无 ：
*******************************************************************************/
int dru_iic_8873_ack(void)
{
unsigned int data;
DRU_ICC_8873_SDA_DIR_IN();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_HIGH();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SDA_IN(data);
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_LOW();
iic_delay(2*IIC_DELAY_TIME);
DRU_ICC_8873_SDA_DIR_OUT();
iic_delay(2*IIC_DELAY_TIME);
if(data!=0){
return 1;
}
return 0;
}
static void i2csoft_sendack(YWGPIO_Handle_T SCL, YWGPIO_Handle_T SDA, int ack)
{
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(3);
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_OUTPUT);
if (ack)
YWGPIO_Write(SDA, 1); //I2C_SDA(1);
else
YWGPIO_Write(SDA, 0); //I2C_SDA(0);
iic_delay(3);
YWGPIO_Write(SCL, 1); //I2C_SCL(1);
iic_delay(5);
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_BIDIRECTIONAL);
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(2);
}
/*******************************************************************************
* 函数名称: dru_iic_8873_write_byte
* 功 能: 8873 的iic 写单个字节
* 参 数:
* 参数名称 类型 描述
*data unsigned char 8873 iic需要写的数据
* 返回值:
* 无
* 说 明:
* 日 期 版本 作者 修改人 DEBUG
* -----------------------------------------------------------------
* 2012/07/04 V1.0 H4 无 ：
*******************************************************************************/
void dru_iic_8873_write_byte(unsigned char data)
{
unsigned char index=0,data_tmp;
data_tmp=data;
for(index=0;index<8;index++){
if(((data_tmp<<index)&0x80)!=0){
DRU_ICC_8873_SDA_OUT_HIGH();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_HIGH();
//printf("gpio->set_data01=%x\n",gpio_t->set_data01);
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_LOW();
//printf("gpio->clr_data01=%x\n",gpio_t->clr_data01);
iic_delay(IIC_DELAY_TIME);
}else{
DRU_ICC_8873_SDA_OUT_LOW();
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_HIGH();
//printf("gpio->set_data01=%x\n",gpio_t->set_data01);
iic_delay(IIC_DELAY_TIME);
DRU_ICC_8873_SCL_OUT_LOW();
iic_delay(IIC_DELAY_TIME);
//printf("gpio->clr_data01=%x\n",gpio_t->clr_data01);
}
//printf("write index=%x\n",index);
}
return;
}
static U8 i2csoft_readbyte(YWGPIO_Handle_T SCL, YWGPIO_Handle_T SDA, int ack)
{
U8 data;
int j;
U8 Value;
data = 0;
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_BIDIRECTIONAL);
YWGPIO_Write(SDA, 1); //I2C_SDA(1);
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_INPUT);
//printk("!!!!:");
for (j = 0; j < 8; j++)
{
iic_delay(1);
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(5);
YWGPIO_Write(SCL, 1); //I2C_SCL(1);
iic_delay(3);
//Value = I2C_READ();
YWGPIO_Read(SDA, &Value);
iic_delay(2);
data = data << 1;
data = data | Value;
//printk("%d ",Value);
//iic_delay(100000);
//I2C_SCL(0);
}
//printk("\n");
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_BIDIRECTIONAL);
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(2);
//YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_OUTPUT);
i2csoft_sendack(SCL, SDA, ack);
return (data);
}
static u8_t iic_recv_byte(void)
{
u8_t i;
u8_t c = 0;
iic_sda_dir(0);
for (i = 0; i < 8; i++)
{
iic_set_scl(0);
iic_delay(10);
iic_set_scl(1);
iic_delay(20);
c |= (iic_get_sda() << (7 - i));
iic_delay(10);
iic_set_scl(0);
iic_delay(20);
}
iic_sda_dir(1);
return c;
}
/*----------------------------------------------------------------------------*/
bool r_ack(void)
{
bit nack;
iic_data_in();
iic_delay();
iic_clk_h();
iic_delay();
iic_delay();
iic_delay();
iic_delay();
iic_delay();
nack = iic_data_r();
iic_clk_l();
iic_delay();
return nack;
}
static int i2c_gpio_readnostop(U8 SlaveAddr, U8 *buffer, int len, int timeout, YWI2CSoft_Device_t *I2CSoftDevice)
{
//int shift;
//int ack;
int i;
#if 0
while (timeout--)
{
i2csoft_sendstart(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle);
//write_byte(SoftI2c.SlaveAddr +1); /* send cycle */
//if(write_byte(SlaveAddr+1)) //ACK
if (!i2csoft_writebyte(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle, SlaveAddr + 1)) //ACK
{
break;
}
i2csoft_sendstop(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle);
iic_delay(10);
}
if (timeout == 0)
{
printk("read error\n");
return (-1);
}
#endif
i2csoft_sendstart(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle);
i2csoft_writebyte(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle, SlaveAddr + 1);
//printk("len = %d :",len);
for (i = 0; i < (len - 1); i++)
{
buffer[i] = i2csoft_readbyte(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle, 0);
//printk("0x%x ",buffer[i]);
}
buffer[len - 1] = i2csoft_readbyte(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle, 1);
//printk("0x%x ",buffer[len-1]);
//printk("\n");
//i2csoft_sendstop(I2CSoftDevice->SCLHandle, I2CSoftDevice->SDAHandle);
return (0);
}
static void iic_init(void)
{
/*
* iic clk - output high level and pull up
*/
writel(S5PV210_GPD1CON, (readl(S5PV210_GPD1CON) & ~(0xf<<4)) | (0x1<<4));
writel(S5PV210_GPD1PUD, (readl(S5PV210_GPD1PUD) & ~(0x3<<2)) | (0x2<<2));
writel(S5PV210_GPD1DAT, (readl(S5PV210_GPD1DAT) & ~(0x1<<1)) | (0x1<<1));
/*
* iic data - output high level and pull up
*/
writel(S5PV210_GPD1CON, (readl(S5PV210_GPD1CON) & ~(0xf<<0)) | (0x1<<0));
writel(S5PV210_GPD1PUD, (readl(S5PV210_GPD1PUD) & ~(0x3<<0)) | (0x2<<0));
writel(S5PV210_GPD1DAT, (readl(S5PV210_GPD1DAT) & ~(0x1<<0)) | (0x1<<0));
iic_set_sda(1);
iic_set_scl(1);
iic_delay(10);
}
static int i2csoft_writebyte(YWGPIO_Handle_T SCL, YWGPIO_Handle_T SDA, U8 data)
{
int j;
U8 nack;
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_OUTPUT);
for (j = 0; j < 8; j++)
{
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(1);
if (data & 0x80)
YWGPIO_Write(SDA, 1); //I2C_SDA(1);
else
YWGPIO_Write(SDA, 0); //I2C_SDA(0);
iic_delay(1);
YWGPIO_Write(SCL, 1); //I2C_SCL(1);
iic_delay(5);
//I2C_SCL(0);
data <<= 1;
}
/*
* Look for an <ACK>(negative logic) and return it.
*/
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_BIDIRECTIONAL);
YWGPIO_Write(SCL, 0); //I2C_SCL(0);
iic_delay(2);
YWGPIO_Write(SDA, 1); //I2C_SDA(1);
iic_delay(2);
YWGPIO_Write(SCL, 1); //I2C_SCL(1);
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_INPUT);
iic_delay(3);
YWGPIO_Read(SDA, &nack); //nack = I2C_READ();
YWGPIO_SetIoMode(SDA, YWGPIO_IO_MODE_BIDIRECTIONAL);
YWGPIO_Write(SCL, 0); //2C_SCL(0);
iic_delay(2);
return (nack); /* not a nack is an ack */
}
static int iic_sendbyte (unsigned char b)
{
unsigned char out, in;
int i;
out = (inb(IOC_CONTROL) & 0xfc) | 0xc0;
outb(out, IOC_CONTROL);
for (i = 7; i >= 0; i--) {
unsigned char c;
c = out | ((b & (1 << i)) ? 1 : 0);
outb(c, IOC_CONTROL);
iic_delay();
outb(c | 2, IOC_CONTROL);
iic_delay();
outb(c, IOC_CONTROL);
}
outb(out | 1, IOC_CONTROL);
iic_delay();
outb(out | 3, IOC_CONTROL);
iic_delay();
in = inb(IOC_CONTROL) & 1;
outb(out | 1, IOC_CONTROL);
iic_delay();
outb(out, IOC_CONTROL);
iic_delay();
if(in) {
printk("No acknowledge from RTC\n");
return 1;
} else
return 0;
}
