Programming STC MCU

Design and development

Dr. C.K Chan MECH 3012 Workshop 11

STC MCU: ISP Programming

Department of Mechanical Engineering The University of Hong Kong

Workshop 11

STC MCU: ISP programming

Table of content

1. Introduction...................................................................................... 2 2. General procedures for ISP programming ...................................... 4 2.1. Prepare *.hex file .................................................................... 5 2.2. Connect cable to the Development board .............................. 8 2.3. Execute ISP program .............................................................. 9

1

Workshop 11 1. Introduction 


STC12C5A60S2 is a single-chip microcontroller based on a high performance 1T architecture 80C51 CPU, which is produced by STC MCU Limited.



With the enhanced kernel, STC12C5A60S2 executes instructions in 1~6 clock cycles (about 6~7 times the rate of a standard 8051 device), and has a

fully compatible instruction set with industrial-standard 80C51 series microcontroller.



In-System-Programming (ISP) and In-Application Programming (IAP) support the users to upgrade the program and data in system.

ISP IAP

•

•

It allows the user to download new code without removing the microcontroller from the actual end product; It means that the device can write nonvalatile data in Flash memory while the application program is running.

2

Workshop 11 


The STC12C5A60S2 retains all features of the standard 80C51. In addition, the STC12C5A60S2 has: 1)

Two extra I/O ports (P4 and P5: package depend),

2)

5) On-clip crystal oscillator, (for ISP programming)

A 10-sources (4 priority-level interrupt structure),

6) A

2-channel

PCA

and

PWM,

3)

10-bit ADC,

7) SPI,

4)

Two UARTS,

8) A

one-time

enabled

Watchdog Timer. 

STC12C5A60S2 series Selection Table is given below:



The STC company also provide MCUs of low cost as AT89S52, such as STC89C51RC.

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Workshop 11


2.

General procedures for ISP programming



Some development boards require STC series MCU to be

cool boot during ISP programming process.

1) Prepare *.hex file

2) Connect cable

3) Execute ISP program

6) Open *.hex file

5) Select MCU type

4) Select COM port

7) Turn off power to MCU

8) Press download button

9) Turn on power to MCU

4

Workshop 11 2.1. Prepare *.hex file 


Replace the file c:/Keil/UV4/uv4.cdb with the file provided in my web site (www.hku.hk/mech/compapp) to add the MCU selection list.



Select the right project option:

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Workshop 11


STC12C5A60S2

No

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Workshop 11 


Download the header file for STC12C5A60S2 to your project folder from my Web site.



Include this header file to your program. You should use this header file only instead of others which provide definition of variables for the STC

MCU. It also contains definition of tradition 8051 MCU.

#include “stc_new_8051.h” ….. main( )

{…} 

Write and build your program with Keil vision.

7

Workshop 11 STC MCU: ISP programming 2.2. Connect cable to the Development board 

Depends on the design of the development board, you may need to use different types of cable.



You need to install the corresponding driver for the development board.

Single USB

USB + USBRS232

•

• •

Power supply and program download

USB: Power supply USBRS232: Program download

Single USB

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Workshop 11

STC MCU: ISP programming USB power supply

USBRS232

USBRS232

USB

2.3. Execute ISP program 

Download the ISP program from my web site. Both program can be executed without installation.

STC4.88 • •

PzISP

Support winXP, win7-32bit English interface

•

•

9

Support winXP, win7 32/64 bit Simplified chinese interface

Workshop 11 


For STC-ISP 4.88

1 2

3

4 5

6

7

1)

Select MCU

2)

Open code file (*.hex)

3)

Select COM port and baud rate 10

Workshop 11


How to check the COM port? Under Window7 control panel  Device

4)

System

& security

 System

manager  COM & LPT.

Set max/min Baud rate to baud rate the same as the COM port. If it is not success. Try lower baud rate, say 1200.

5)

Select On-Clip R/C clock

6)

Turn off MCU power

7)

Press ISP programing button

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Workshop 11




8)

Turn on MCU power

9)

Wait…

For PzISP

1

2

5 3 4

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Workshop 11


1) Select MCU type

2) Set COM port

3) Set baud rate to the port setting. Use low speed download. If it is not success in later step, try 1200 here.

4) Open *.hex

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Workshop 11


5) Turn off the MCU board. 6) Download program

7) Turn on the MCU board just after press the download program button. 8) You should see the following screen.

14

Programming STC MCU

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