📄 uwrdio.c
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PUT_BIT_TF(_b_,16); \
PUT_BIT_TF(_b_,8); \
PUT_BIT_TF(_b_,4); \
PUT_BIT_TF(_b_,2); \
PUT_BIT_TF(_b_,1)
// The loops are unrolled in these macros to get the best possible speed.
#define PUT_BYTE_HIZ_TF(_b_) \
PUT_BIT_TF(_b_,128); \
PUT_BIT_TF(_b_,64); \
PUT_BIT_TF(_b_,32); \
PUT_BIT_TF(_b_,16); \
PUT_BIT_TF(_b_,8); \
PUT_BIT_TF(_b_,4); \
PUT_BIT_TF(_b_,2); \
PUT_BIT_HIZ_TF(_b_,1)
#define GET_BIT_TF(_b_,_bit_) \
SCL_ONE; \
SCL_ZERO; \
if (SDI != 0) \
{ \
_b_ |= _bit_; \
}
// The loops are unrolled in these macros to get the best possible speed.
#define GET_BYTE_TF(_b_) \
GET_BIT_TF(_b_,128); \
GET_BIT_TF(_b_,64); \
GET_BIT_TF(_b_,32); \
GET_BIT_TF(_b_,16); \
GET_BIT_TF(_b_,8); \
GET_BIT_TF(_b_,4); \
GET_BIT_TF(_b_,2); \
GET_BIT_TF(_b_,1)
// wait for programming complete; This is probably only useful
// on microwire EEPROMs.
#pragma save
#pragma NOAREGS
void uwr_busy_wait(void) small reentrant
{
mode |= BUSY_WAIT_MODE;
}
#pragma restore
// The clock polarity should be selected before the device is selected.
// rising edge of leading clock edge is data to device,
// falling edge of trailing clock edge is data from device
// Used on microwire eeproms, and this is the default
#pragma save
#pragma NOAREGS
static void uwr_leading_rising (void) small reentrant
{
SCL_ZERO;
SDO_ZERO;
mode |= LEADING_OUT;
}
#pragma restore
#if SPI_POLARITIES
// The clock polarity should be selected before the device is selected.
// falling edge of leading clock edge is data to device,
// rising edge of trailing clock edge is data from device
#pragma save
#pragma NOAREGS
static void uwr_leading_falling (void) small reentrant
{
SCL_ONE;
SDO_ZERO;
mode |= LEADING_OUT;
}
#pragma restore
// The clock polarity should be selected before the device is selected.
// rising edge of trailing clock edge is data to device,
// falling edge of leading clock edge is data from device
#pragma save
#pragma NOAREGS
static void uwr_trailing_rising (void) small reentrant
{
SCL_ZERO;
SDO_ZERO;
mode &= ~LEADING_OUT;
}
#pragma restore
// The clock polarity should be selected before the device is selected.
// falling edge of trailing clock edge is data to device,
// rising edge of leading clock edge is data from device
#pragma save
#pragma NOAREGS
static void uwr_trailing_falling (void) small reentrant
{
SCL_ONE;
SDO_ZERO;
mode &= ~LEADING_OUT;
}
#pragma restore
#endif // SPI_POLARITIES
// transmit a counted string of bytes to a microwire bus
#pragma save
#pragma NOAREGS
uint8_t uwr_write(uint8x_t *pchOut, uint16_t cnt) small reentrant
{
uint8_t data b;
uint16_t timeout;
SDO_POWERED;
#if SPI_POLARITIES
if ( SCL == 0 )
{
if ( mode & LEADING_OUT )
{
#endif
RESET_WD();
for(; cnt > 1; --cnt)
{
b = *pchOut++;
PUT_BYTE_LR(b);
}
if (cnt == 1)
{
b = *pchOut++;
PUT_BYTE_HIZ_LR(b);
if (mode & BUSY_WAIT_MODE)
{
uint8_t cs_index = last_cs_index;
uwr_select (UWR_NO_DEVICE);
// OSCOPE_INIT; OSCOPE_ONE;
uwr_select (cs_index);
// OSCOPE_ZERO;
mode &= ~BUSY_WAIT_MODE;
timeout = HALF_SECOND;
while (SDI == 0)
{
RESET_WD();
delay_clks (3);
if (--timeout == 0)
return 0;
}
}
}
return 1;
#if SPI_POLARITIES
}
else
{
RESET_WD();
for(; cnt > 1; --cnt)
{
b = *pchOut++;
PUT_BYTE_LF(b);
}
if (cnt == 1)
{
b = *pchOut++;
PUT_BYTE_HIZ_LF(b);
if (mode & BUSY_WAIT_MODE)
{
uint8_t cs_index = last_cs_index;
uwr_select (UWR_NO_DEVICE);
uwr_select (cs_index);
mode &= ~BUSY_WAIT_MODE;
timeout = HALF_SECOND;
while (SDI == 0)
{
RESET_WD();
delay_clks (3);
if (--timeout == 0)
return 0;
}
}
}
return 1;
}
}
else
{
if ( mode & LEADING_OUT )
{
RESET_WD();
for(; cnt > 1; --cnt)
{
b = *pchOut++;
PUT_BYTE_TR(b);
}
if (cnt == 1)
{
b = *pchOut++;
PUT_BYTE_HIZ_TR(b);
if (mode & BUSY_WAIT_MODE)
{
uint8_t cs_index = last_cs_index;
uwr_select (UWR_NO_DEVICE);
uwr_select (cs_index);
mode &= ~BUSY_WAIT_MODE;
timeout = HALF_SECOND;
while (SDI == 0)
{
RESET_WD();
delay_clks (3);
if (--timeout == 0)
return 0;
}
}
}
return 1;
}
else
{
RESET_WD();
for(; cnt > 1; --cnt)
{
b = *pchOut++;
PUT_BYTE_TF(b);
}
if (cnt == 1)
{
b = *pchOut++;
PUT_BYTE_HIZ_TF(b);
if (mode & BUSY_WAIT_MODE)
{
uint8_t cs_index = last_cs_index;
uwr_select (UWR_NO_DEVICE);
uwr_select (cs_index);
mode &= ~BUSY_WAIT_MODE;
timeout = HALF_SECOND;
while (SDI == 0)
{
RESET_WD();
delay_clks (3);
if (--timeout == 0)
return 0;
}
}
}
return 1;
}
}
#endif
}
#pragma restore
// receive a counted string of bytes from a microwire bus
#pragma save
#pragma NOAREGS
void uwr_read(uint8x_t *pchIn, uint16_t cnt) small reentrant
{
uint8_t data b;
SDI_UNPOWERED; // insurance: can't write and read at the same time!
#if SPI_POLARITIES
if ( SCL == 0 )
{
if ( mode & LEADING_OUT )
{
#endif
RESET_WD();
for(; cnt != 0; --cnt)
{
b = 0; // get_byte() ors bits in, so start with 0.
GET_BYTE_LR(b); // get a byte from the bus.
*pchIn++ = b; // store it.
}
RESET_WD();
#if SPI_POLARITIES
}
else
{
RESET_WD();
for(; cnt != 0; --cnt)
{
b = 0; // get_byte() ors bits in, so start with 0.
GET_BYTE_LF(b); // get a byte from the bus.
*pchIn++ = b; // store it.
}
RESET_WD();
}
}
else
{
if ( mode & LEADING_OUT )
{
RESET_WD();
for(; cnt != 0; --cnt)
{
b = 0; // get_byte() ors bits in, so start with 0
GET_BYTE_TR(b); // get a byte from the bus
*pchIn++ = b; // store it
}
RESET_WD();
}
else
{
RESET_WD();
for(; cnt != 0; --cnt)
{
b = 0; // get_byte() ors bits in, so start with 0
GET_BYTE_TF(b); // get a byte from the bus
*pchIn++ = b; // store it
}
RESET_WD();
}
}
#endif
}
#pragma restore
#endif // UW_SW
/***************************************************************************
* $Log: uwrdio.c,v $
* Revision 1.17 2006/10/13 00:47:29 tvander
* Removed compile options for 6530, 6515;
* renamed 6511 and 6513 to trace11 and trace13;
* Binary verified unchanged from previous version.
*
* Revision 1.16 2006/09/09 01:10:19 gmikef
* *** empty log message ***
*
* Revision 1.15 2006/09/06 02:12:02 tvander
* Fixed too-long timeout.
*
* Revision 1.14 2006/08/30 21:55:11 gmikef
* *** empty log message ***
*
* Revision 1.13 2006/08/09 00:56:37 tvander
* *** empty log message ***
*
* Revision 1.12 2006/06/15 19:56:37 tvander
* Coded fixes to enable operation from interrupts.
*
* Revision 1.11 2006/05/18 23:18:45 tvander
* 16K and 32K
* First cut at new requirements.
* 32K 6521 is grossly tested.
* All others have a clean compile with C51 8.02
*
* Revision 1.10 2006/03/08 03:06:54 gmikef
* *** empty log message ***
*
* Revision 1.9 2006/03/08 00:00:57 tvander
* Revised IO so that multiplexed interrupts are centralized in io65xx.c
* Added default interrupts to io65xx.c
* Clean build.
* Tested CE, serial.
* interrupting EEPROM driver fails.
*
* Revision 1.8 2006/03/06 03:32:40 Michael T. Fischer
* More 6530 prep.
*
* Revision 1.7 2006/03/03 11:26:30 Michael T. Fischer
* Prep for 6530 LCD, etc.
*
* Revision 1.6 2006/01/10 03:58:54 gmikef
* Added PDATA support for CE Outputs.
*
* Revision 1.3 2005/11/19 00:38:37 tvander
* Working 3-wire EEPROM interface
*
* Revision 1.2 2005/10/29 02:25:33 tvander
* Working Microwire drivers
*
* Revision 1.1 2005/10/26 23:52:22 tvander
* Microwire EEPROM access via DIO
*
*
* Copyright (C) 2005 Teridian Semiconductor Corp. All Rights Reserved. *
* this program is fully protected by the United States copyright *
* laws and is the property of Teridian Semiconductor Corporation. *
***************************************************************************/
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