device_run_test_idle (::quartus::jtag)
The following table displays information for the device_run_test_idle Tcl command:
Tcl Package and Version |
Belongs to ::quartus::jtag 1.0 |
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Syntax | device_run_test_idle [-h | -help] [-long_help] [-num_clocks <state cycle count> ] | |||
Arguments | -h | -help | Short help | ||
-long_help | Long help with examples and possible return values | |||
-num_clocks <state cycle count> | The number of times the Run_Test_Idle state is cycled through. If not specified, this value is 1 | |||
Description |
Drive the JTAG controller into the Run_Test_Idle state for a number cycles specified with the -num_clocks option. The device must be locked before you can perform this operation. |
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Example Usage |
# List all available programming hardware, and select the USB-Blaster. # (Note: this example assumes only one USB-Blaster is connected.) puts "Programming Hardware:" foreach hardware_name [get_hardware_names] { puts $hardware_name if { [string match "USB-Blaster*" $hardware_name] } { set usbblaster_name $hardware_name } } puts "\nSelect JTAG chain connected to $usbblaster_name.\n"; # List all devices on the chain, and select the first device on the chain. puts "\nDevices on the JTAG chain:" foreach device_name [get_device_names -hardware_name $usbblaster_name] { puts $device_name if { [string match "@1*" $device_name] } { set test_device $device_name } } puts "\nSelect device: $test_device.\n"; # Open device open_device -hardware_name $usbblaster_name -device_name $test_device # Retrieve device id code. # IDCODE instruction value is 6; The ID code is 32 bits long. # IR and DR shift should be locked together to ensure that other applications # will not change the instruction register before the id code value is shifted # out while the instruction register is still holding the IDCODE instruction. device_lock -timeout 10000 device_ir_shift -ir_value 6 -no_captured_ir_value puts "IDCODE: 0x[device_dr_shift -length 32 -value_in_hex]" # Goto the Run_Test_Idle state and stay there for 8 cycles. device_run_test_idle -num_clocks 8 device_unlock # Close device close_device |
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Return Value | Code Name | Code | String Return | |
TCL_OK | 0 | INFO: Operation successful | ||
TCL_ERROR | 1 | ERROR: A device has not been locked; exclusive communication must be obtained first. | ||
TCL_ERROR | 1 | ERROR: A device has been locked by another application; exclusive communication cannot be granted within the specified timeout period. |