Hssp Programming Data; Main Application Code; Hssp Error Status - Infineon PSoC 4 Quick Start Quide

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PSoC 4 Programming Using an External Microcontroller (HSSP)

HSSP Firmware Architecture

Timestamp definitions are derived from the electrical timing specifications provided in the Device

Programming Specifications. The values of these timestamp parameter definitions in Timeout.h are for a

PSoC 5LP host programmer running at a clock frequency of 63 MHz.

Timestamp definitions and the delay routine are used in the function definitions in the ProgrammingSteps.c

file.

To learn how to calculate the timestamp parameters for a specific host programmer, see the section

Calculating HSSP Timeout

2.6

HSSP Programming Data

Files that contain the programming data to be stored in the host programmer are described:

Table 5

Files Containing the Programming Data

Source Files

Description

HexImage

These files contain the data to be programmed into the target device.

(.c and .h files)

They also store the target device parameters used in HSSP programming, such as silicon ID,

checksum, total number of flash rows, and number of bytes per flash row.

The data in these files is stored in PSoC 5LP flash memory as an array of constants.

These files are generated by the C# application Hex File Parser, which is provided with this application note.

This application generates these files by taking the target device hex file as the input. The details of this

application are provided in

For details on the hex file format, see "Appendix B. Intel Hex File Format" in the programming specifications

document of the respective device listed in the

For host programmers that lack the memory capacity to store the programming data in the on-chip memory,

the HexImage.c and HexImage.h files are not required. In such cases, the HSSP programming data is typically

sent to the host as packets through a communication interface, such as I

Note:

See the section

the HSSP source code according to the method used to get the programming data.

2.7

Main Application Code

The main.c file is the main application code that calls the top-level HSSP programming steps in the sequence

shown in

Figure

1. The function ProgramDevice() in main.c executes all the steps. Each step must be

executed successfully before you can proceed to the next step.

The HSSP operation is aborted if a FAILURE is returned after any step. The error status returned by the

ReadHsspErrorStatus()function is used to identify the cause of the error. The status of the HSSP

operation, along with the error status register, is displayed on a character LCD in the attached HSSP project.

Note:

The character LCD and Pin_Start routines are specific to the PSoC 5LP host programmer and,

therefore, should be modified as required for any other host programmer.

2.8

HSSP Error Status

When any of the top-level steps in the HSSP application returns a failure status, the

ReadHsspErrorStatus() function is called from the main application code to get the details of the error.

Application Note

Parameters.

Appendix

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