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Fix DTR/RTS reset/isp signals for SYSFS_GPIO_SUPPORT #20

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Fix DTR/RTS reset/isp signals for SYSFS_GPIO_SUPPORT #20

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72 changes: 36 additions & 36 deletions lpc21isp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1653,6 +1653,41 @@ run mode.
*/
void ResetTarget(ISP_ENVIRONMENT *IspEnvironment, TARGET_MODE mode)
{
if (IspEnvironment->ControlLines)
{
switch (mode)
{
/* Reset and jump to boot loader. */
case PROGRAM_MODE:
ControlModemLines(IspEnvironment, 1, 1);
Sleep(100);
ClearSerialPortBuffers(IspEnvironment);
Sleep(100);
ControlModemLines(IspEnvironment, 0, 1);
//Longer delay is the Reset signal is conected to an external rest controller
Sleep(500);
// Clear the RTS line after having reset the micro
// Needed for the "GO <Address> <Mode>" ISP command to work */
if(!IspEnvironment->BootHold)
{
ControlModemLines(IspEnvironment, 0, 0);
}
break;

/* Reset and start uploaded program */
case RUN_MODE:
ControlModemLines(IspEnvironment, 1, 0);
Sleep(100);
ClearSerialPortBuffers(IspEnvironment);
Sleep(100);
ControlModemLines(IspEnvironment, 0, 0);
Sleep(100);
break;
}

return;
}

#if defined(__linux__) && ( defined(SYSFS_GPIO_SUPPORT) || ( defined(GPIO_RST) && defined(GPIO_ISP) ) )

// This code section allows using Linux GPIO pins to control the -RST and -ISP
Expand Down Expand Up @@ -1685,7 +1720,7 @@ void ResetTarget(ISP_ENVIRONMENT *IspEnvironment, TARGET_MODE mode)
// special permissions to access the GPIO signals.

#if defined(SYSFS_GPIO_SUPPORT)
if (!IspEnvironment->ControlLines && (IspEnvironment->GpioIsp == 0 || IspEnvironment->GpioRst == 0))
if (IspEnvironment->GpioIsp == 0 || IspEnvironment->GpioRst == 0)
{
return;
}
Expand Down Expand Up @@ -1748,42 +1783,7 @@ void ResetTarget(ISP_ENVIRONMENT *IspEnvironment, TARGET_MODE mode)

close(gpio_isp);
close(gpio_rst);

return;
#endif

if (IspEnvironment->ControlLines)
{
switch (mode)
{
/* Reset and jump to boot loader. */
case PROGRAM_MODE:
ControlModemLines(IspEnvironment, 1, 1);
Sleep(100);
ClearSerialPortBuffers(IspEnvironment);
Sleep(100);
ControlModemLines(IspEnvironment, 0, 1);
//Longer delay is the Reset signal is conected to an external rest controller
Sleep(500);
// Clear the RTS line after having reset the micro
// Needed for the "GO <Address> <Mode>" ISP command to work */
if(!IspEnvironment->BootHold)
{
ControlModemLines(IspEnvironment, 0, 0);
}
break;

/* Reset and start uploaded program */
case RUN_MODE:
ControlModemLines(IspEnvironment, 1, 0);
Sleep(100);
ClearSerialPortBuffers(IspEnvironment);
Sleep(100);
ControlModemLines(IspEnvironment, 0, 0);
Sleep(100);
break;
}
}
}


Expand Down