// ============================================================================
// fXRESInitializeTargetForISSP()
// Implements the intialization vectors for the device.
// Returns:
// 0 if successful
// INIT_ERROR if timed out on handshake to the device.
// ============================================================================
signed char fXRESInitializeTargetForISSP(void)
{
// Configure the pins for initialization
SetSDATAHiZ();
SetSCLKStrong();
SCLKLow();
SetXRESStrong();
// Cycle reset and put the device in programming mode when it exits reset
AssertXRES();
Delay(XRES_CLK_DELAY);
DeassertXRES();
// !!! NOTE:
// The timing spec that requires that the first Init-Vector happen within
// 1 msec after the reset/power up. For this reason, it is not advisable
// to separate the above RESET_MODE or POWER_CYCLE_MODE code from the
// Init-Vector instructions below. Doing so could introduce excess delay
// and cause the target device to exit ISSP Mode.
//PTJ: Send id_setup_1 instead of init1_v
//PTJ: both send CA Test Key and do a Calibrate1 SROM function
SendVector(id_setup_1, num_bits_id_setup_1);
if (fIsError = fDetectHiLoTransition()) {
return(INIT_ERROR);
}
SendVector(wait_and_poll_end, num_bits_wait_and_poll_end);
// NOTE: DO NOT not wait for HiLo on SDATA after vector Init-3
// it does not occur (per spec).
return(PASS);
}
/* ============================================================================
// fXRESInitializeTargetForISSP()
// Implements the intialization vectors for the device.
// Returns:
// 0 if successful
// INIT_ERROR if timed out on handshake to the device.
============================================================================*/
signed char fXRESInitializeTargetForISSP(void)
{
/* Configure the pins for initialization */
SetSDATAHiZ();
SetSCLKStrong();
SCLKLow();
#ifdef ACTIVE_LOW_XRES
AssertXRES(); /* assert XRES before setting XRES pin to strong */
SetXRESStrong();
DeassertXRES();
/* Delay(XRES_CLK_DELAY); */
mdelay(1);
AssertXRES();
#else
/* Cycle reset and put the device in programming mode when it exits reset */
SetXRESStrong();
AssertXRES();
Delay(XRES_CLK_DELAY);
DeassertXRES();
#endif
/* !!! NOTE:
// The timing spec that requires that the first Init-Vector happen within
// 1 msec after the reset/power up. For this reason, it is not advisable
// to separate the above RESET_MODE or POWER_CYCLE_MODE code from the
// Init-Vector instructions below. Doing so could introduce excess delay
// and cause the target device to exit ISSP Mode.
*/
SendVector(id_setup_1, num_bits_id_setup_1);
fIsError = fDetectHiLoTransition();
if (fIsError)
return INIT_ERROR;
SendVector(wait_and_poll_end, num_bits_wait_and_poll_end);
/* NOTE: DO NOT not wait for HiLo on SDATA after vector Init-3
// it does not occur (per spec). */
return PASS;
}
