eCosTM Reference Manual
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# Package: TX39 architecture

#### Macro name

CYGPKG_HAL_TX39

#### Type

Radio

#### Description

The TX39 architecture HAL package provides generic support for this processor architecture. It is also necessary to select a specific target platform HAL package.

## Option: CPU frequency

#### Macro name

CYGHWR_HAL_MIPS_CPU_FREQ

#### Type

Count

#### Description

This option contains the frequency of the CPU in MegaHertz. Choose the frequency to match the processor you have. This may affect thing like serial device, interval clock and memory access speed settings.

## Package: JMR3904 evaluation board

#### Macro name

CYGPKG_HAL_TX39_JMR3904

#### Type

Radio

#### Description

The JMR3904 HAL package should be used when targeting the actual hardware. The same package can also be used when running on the full simulator, since this provides an accurate simulation of the hardware including I/O devices. To use the simulator in this mode the command `target sim --board=jmr3904" should be used from inside gdb.

### Option: Startup type

#### Macro name

CYGHWR_HAL_TX39_JMR3904_STARTUP

#### Type

Enum

#### Description

When targeting the JMR3904 board it is possible to build the system for either RAM bootstrap or ROM bootstrap. The former generally requires that the board is equipped with ROMs containing the Cygmon ROM monitor or equivalent software that allows gdb to download the eCos application on to the board. The latter typically requires that the eCos application be blown into EPROMs or equivalent technology.

## Package: Minimal simulator

#### Macro name

CYGPKG_HAL_TX39_SIM

#### Type

Radio

#### Description

The minimal simulator HAL package is provided for when only a simple simulation of the processor architecture is desired, as opposed to detailed simulation of any specific board. To use this minimal simulator the command `target sim --board=jmr3904pal" should be used from inside gdb. It is not possible to use any of the eCos device drivers when the simulator is running in this mode

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