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RTD2660_SPI.h
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RTD2660_SPI.h
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#ifndef RTD2660_SPI_H
#define RTD2660_SPI_H
//-----------------------------------------------------------------------------
#include "avr/pgmspace.h"
#include "config.h"
//-----------------------------------------------------------------------------
#define RTD_READ 1
#define RTD_WRITE 0
#define RTD_NO_AUTOINC 1
#define RTD_AUTOINC 0
#define RTD_ID_ADDRESS 0x00
#define RTD_ID_MAGIC 0xF1
#define RTD_RX_DATA ((RTD_RX_PIN & _bit(RTD_RX_BIT)) >> RTD_RX_BIT)
#define RTD_enable() clr_bit(RTD_CS_PORT, RTD_CS_BIT)
#define RTD_disable() set_bit(RTD_CS_PORT, RTD_CS_BIT)
#define RTD_toggle_clk() RTD_CLK_PORT = RTD_CLK_PORT ^ _bit(RTD_CLK_BIT)
//-----------------------------------------------------------------------------
__inline void RTD2660_SPI_init()
{
set_bit(RTD_CLK_DDR, RTD_CLK_BIT);
set_bit(RTD_TX_DDR, RTD_TX_BIT);
set_bit(RTD_CS_PORT, RTD_CS_BIT);
set_bit(RTD_CS_DDR, RTD_CS_BIT);
}
//-----------------------------------------------------------------------------
__inline void RTD2660_SPI_send_bit(BYTE value)
{
if(value)
{
set_bit(RTD_TX_PORT, RTD_TX_BIT);
}
else
{
clr_bit(RTD_TX_PORT, RTD_TX_BIT);
}
RTD_toggle_clk();
}
//-----------------------------------------------------------------------------
__inline BYTE RTD2660_SPI_get_bit()
{
static BYTE read;
read = RTD_RX_DATA;
RTD_toggle_clk();
return read;
}
//-----------------------------------------------------------------------------
__inline void RTD2660_SPI_read(BYTE address, BYTE count, BYTE *data, bool auto_inc)
{
register BYTE tmp = address;
set_bit(RTD_CLK_PORT, RTD_CLK_BIT);
RTD_enable();
// address
for(BYTE i = 0; i < 8; i++)
{
RTD2660_SPI_send_bit(tmp & 0x1);
tmp >>= 1;
}
// command
RTD2660_SPI_send_bit(RTD_READ);
if(auto_inc && count>1)
RTD2660_SPI_send_bit(RTD_AUTOINC);
else
RTD2660_SPI_send_bit(RTD_NO_AUTOINC);
RTD2660_SPI_send_bit(1);
// reply
BYTE pos = 0;
while(count--)
{
for(BYTE i = 0; i < 8; i++)
{
tmp = (tmp >> 1) | (RTD2660_SPI_get_bit() << 7);
}
data[pos++] = tmp;
}
RTD_disable();
}
//-----------------------------------------------------------------------------
__inline void RTD2660_SPI_write(const BYTE address, const BYTE count, const BYTE *data, const bool auto_inc)
{
register BYTE tmp = address;
register BYTE cnt = count;
set_bit(RTD_CLK_PORT, RTD_CLK_BIT);
RTD_enable();
// address and command
for(BYTE i = 0; i < 8; i++)
{
RTD2660_SPI_send_bit(tmp & 0x1);
tmp >>= 1;
}
RTD2660_SPI_send_bit(RTD_WRITE);
if(auto_inc && count > 1)
RTD2660_SPI_send_bit(RTD_AUTOINC);
else
RTD2660_SPI_send_bit(RTD_NO_AUTOINC);
// data
BYTE pos = 0;
while(cnt--)
{
tmp = data[pos++];
for(BYTE i = 0; i < 8; i++)
{
RTD2660_SPI_send_bit(tmp & 0x1);
tmp >>= 1;
}
}
RTD_disable();
}
//-----------------------------------------------------------------------------
__inline void RTD2660_SPI_write_pgm(const BYTE address, const BYTE count, const BYTE *data, const bool auto_inc)
{
register BYTE tmp = address;
register BYTE cnt = count;
set_bit(RTD_CLK_PORT, RTD_CLK_BIT);
RTD_enable();
// address and command
for(BYTE i = 0; i < 8; i++)
{
RTD2660_SPI_send_bit(tmp & 0x1);
tmp >>= 1;
}
RTD2660_SPI_send_bit(RTD_WRITE);
if(auto_inc && count > 1)
RTD2660_SPI_send_bit(RTD_AUTOINC);
else
RTD2660_SPI_send_bit(RTD_NO_AUTOINC);
// data
BYTE pos = 0;
while(cnt--)
{
tmp = pgm_read_byte(data + pos++);
for(BYTE i = 0; i < 8; i++)
{
RTD2660_SPI_send_bit(tmp & 0x1);
tmp >>= 1;
}
}
RTD_disable();
}
//-----------------------------------------------------------------------------
#endif