J-Link / J-Trace User Guide (UM08001) - Microcontrollers
J-Link / J-Trace User Guide (UM08001) - Microcontrollers
J-Link / J-Trace User Guide (UM08001) - Microcontrollers
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122 CHAPTER 5 Working with J-<strong>Link</strong> and J-<strong>Trace</strong><br />
Variable Description R/W<br />
Pulls reset pin low / Releases nRST pin. Used<br />
to issue a reset of the CPU. Value assigned to<br />
reset pin reflects the state. 0 = Low, 1 = high.<br />
JTAG_ResetPin Example<br />
JTAG_ResetPin = 0;<br />
SYS_Sleep(5); // Give pin some time to get low<br />
JTAG_ResetPin = 1;<br />
Pulls reset pin low / Releases nTRST pin. Used<br />
to issue a reset of the debug logic of the CPU.<br />
Value assigned to reset pin reflects the state.<br />
JTAG_TRSTPin<br />
0 = Low, 1 = high.<br />
Example<br />
JTAG_TRSTPin = 0;<br />
SYS_Sleep(5); // Give pin some time to get low<br />
JTAG_TRSTPin = 1;<br />
If the connected device has an ETB and you<br />
want to use it with J-link, this variable should<br />
be set to 1. Setting this variable in another<br />
function as InitEmu() does not have any<br />
EMU_ETB_IsPresent effect.<br />
Example<br />
void InitEmu(void) {<br />
EMU_ETB_IsPresent = 1;<br />
}<br />
Table 5.10: Global DLL variables<br />
5.10.4 Global DLL constants<br />
Currently there are only global DLL constants to set the global DLL variable CPU. If<br />
necessary, more constants will be implemented in the future.<br />
5.10.4.1 Constants for global variable: CPU<br />
The following constants can be used to set the global DLL variable CPU:<br />
• ARM7<br />
• ARM7TDMI<br />
• ARM7TDMIR3<br />
• ARM7TDMIR4<br />
• ARM7TDMIS<br />
• ARM7TDMISR3<br />
• ARM7TDMISR4<br />
• ARM9<br />
• ARM9TDMIS<br />
• ARM920T<br />
• ARM922T<br />
• ARM926EJS<br />
• ARM946EJS<br />
• ARM966ES<br />
• ARM968ES<br />
• ARM11<br />
• ARM1136<br />
• ARM1136J<br />
• ARM1136JS<br />
• ARM1136JF<br />
• ARM1136JFS<br />
• ARM1156<br />
• ARM1176<br />
• ARM1176J<br />
• ARM1176JS<br />
• ARM1176IF<br />
Write-only<br />
Write-only<br />
Write-only<br />
J-<strong>Link</strong> / J-<strong>Trace</strong> (<strong>UM08001</strong>) © 2004-2010 SEGGER Microcontroller GmbH & Co. KG
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