UInt32 getBufferFromI2C0(UInt8 addr, UInt8 *buffer, UInt32 len)
{
UInt32 i;
UInt8 status;
UInt8 *ptr;
ptr = buffer;
if( i2c0_start()!=I2C_OK)
{
//DebugPrintf("GetBufferFromI2C0.i2c0_start I2C_ERROR\r\n");
//i2c0_stop();
return I2C_ERROR;
}
addr = addr|1;
while( i2c0_write(addr) == I2C_BUSY);
for(i=0;i<len;i++)
{
while(1)
{
GET_I2C_STATUS();
/*
* SLA+R transmitted, ACK received or
* SLA+R transmitted, ACK not received
* data byte received in master mode, ACK transmitted
*/
if((status == 0x40 ) || (status == 0x48 ) || (status == 0x50 ))
{
if(i==len-1)
{
SEND_NACK();
}
else
{
SEND_ACK();
}
while(i2c0_read(ptr)==I2C_EMPTY);
ptr++;
break;
}
else if(status != 0xf8 )
{
i2c0_stop();
//DebugPrintf("GetBufferFromI2C0 I2C_ERROR\r\n");
return I2C_ERROR;
}
}//while(1)
}//for
i2c0_stop();
return I2C_OK;
}
/*!
Receive from appointed slave with sending firstly, and with stop operation after sending.
start-slave-data(w)-...-stop-start-slave-data(r)-...-stop
*/
static RET_CODE i2c_jazz_std_read(lld_i2c_t *p_lld,
u8 slv_addr,
u8 *p_buf,
u32 wlen,
u32 rlen,
u32 param)
{
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
i2c_ctrller_jazz_priv_t *p_priv = (i2c_ctrller_jazz_priv_t *)p_lld->p_priv;
u8 times = 0;
i2c_jazz_pinmux(p_priv->i2c_id);
if(wlen == 0)
{
return i2c0_read(p_lld, slv_addr, p_buf, rlen);
}
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
for(times = 0; times < 3; times++)
{
if(SUCCESS != i2c0_write(p_lld, slv_addr, p_buf, wlen))
{
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
return ERR_HARDWARE;
}
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
if(SUCCESS != i2c0_read_no_stop(p_priv->i2c_id, slv_addr, p_buf, rlen))
{
i2c0_fatal_err_restore(p_priv->i2c_id, p_priv->i2c_clk);
continue;
} ////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
if(SUCCESS != i2c0_stop_retry(p_priv->i2c_id, 3))
{
i2c0_fatal_err_restore(p_priv->i2c_id, p_priv->i2c_clk);
continue;
}
break;
}
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
if(times == 3)
{
return ERR_HARDWARE;
}
////OS_PRINTF(" i2c_jazz_std_read 1111 %d %s\n",__LINE__, __FILE__);
// Todo: fix me! control reaches end of non-void function
return SUCCESS;
}
UInt32 private_i2c0_send(UInt8 data)
{
UInt32 cnt = I2C_CNT;
while( i2c0_write(data) == I2C_BUSY)
{
cnt--;
waitUs(1);
if(cnt==0)
{
return I2C_TIMEOUT;
}
}
return 0;
}
void i2c0_write_wait(UInt8 data)
{
UInt32 cnt = I2C_CNT;
while( i2c0_write(data) == I2C_BUSY)
{
cnt--;
waitUs(1);
if(cnt==0)
{
//DebugPrintf("i2c0_write_wait timeout\r\n");
return;
}
}
i2c0_wait_after_write();
}
