Renesas HS6400FDIW3S Uživatelský manuál stáhnout pdf (Strana 27)

3.1.4 What are“Protocol A”, “Protocol B” and “Protocol C” Kernels?

“Protocol A” - For some 0.8µm, 0.6µm and 0.35µm flash devices using FDT 1.5 style kernels.

These are legacy kernels that are not supported and not included in the FDT installer.

Protocol A kernels are not available in the Japanese versions of FDT. Protocol A kernels

support use of the UPB but not the FDM. The kernel needs to be rebuilt for different crystal

frequencies in Boot and User Modes, and for changing the PMODE pin if using the UPB.

Please refer to the documentation supplied with the kernels for additional information.

“Protocol B” – For 0.35µm devices. These support the FDM but not the UPB.

Boot Mode - The kernel (made up of the Boot Mode Micro Kernel, Boot Mode Main Kernel,

and the Write and Erase modules) is held on the PC and downloaded as required. The Boot

Mode kernel does not need to be rebuilt for different crystal frequencies; this information is

stored in the FDT project and downloaded at runtime and initial communication is achieved

by the autobaud (where FDT sends 0x00 data until the device synchronises with it).

User Mode – The User Mode Test Program and User Mode Micro-Kernel need to be already

programmed and executing on the device. The initial Bit Rate Register value is held in the

‘gentest.h’ file and is compiled into the User Mode Test Program; this allows the kernel

initialise the serial communications interface to 9600 baud. If the clock frequency changes

from the default supplied value, the initial Bit Rate Register setting in ‘gentest.h’ [normally

MA_BRR_SCI or MA_BRR_SCI1] will need to be modified and the kernel recompiled. The

User Mode Main Kernel and the Write and Erase modules are held on the PC and

downloaded as required.

“Protocol C” – For devices with embedded kernels (Currently 0.18µm). These support the FDM but

not the UPB.

Boot Mode – A configuration file is stored on the PC which provides FDT with details about

the device, but the kernel (including the Write and Erase modules) resides internally on the

device. There is no need to rebuild anything for different clock frequencies in Boot Mode;

this information is stored in the FDT project and downloaded at runtime and initial

communication is achieved by the autobaud (where FDT sends 0x00 data until the device

synchronises with it).

User Mode – Some boards are supplied with a User Mode kernel. Similarly to the Protocol B

User Mode kernels, User Mode Kernel needs to be already programmed and executing on the

device. The initial Bit Rate Register value is held in the ‘gentest.h’ file and is compiled into

the User Mode Test Program; this allows the kernel initialise the serial communications

interface to 9600 baud. If the clock frequency changes from the default supplied value, the

initial Bit Rate Register setting in ‘gentest.h’ [normally MA_BRR_SCI or MA_BRR_SCI1]

will need to be modified and the kernel recompiled. The main difference to the Protocol B

User Mode Kernels is that the Write and Erase modules are held internally on the device.

3.1.5 What are the fcf and fdm files, can I edit them?

Stored alongside the other kernel files, the .fcf (Flash Configuration File) and .fdm (Flash

Development Module) files hold details about the device and kernel. Each supported device in each

kernel directory has its own .fcf and .fdm file. Information such as the RAM size, Flash size, Erase

Block Register details, default baud rate and default crystal frequency is stored in the fcf file and

details about the allowed pin settings for the FDM is stored in the FDM file. Each of these files is

protected with a checksum, so editing will render them invalid and FDT will detect this. Upon

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