SH7216 Group Reprogramming Flash Memory in User Program
Contents
1. tENESAS APPLICATION NOTE SH7216 Group Reprogramming Flash Memory in User Program Mode ica meee Using an Ethernet Connection Apr 06 2011 Introduction This application note presents a sample program that uses the Ethernet controller EtherC and Ethernet controller direct memory access controller E DMAC of the SH7216 to receive data from a host PC via an Ethernet connection and then writes the data to the on chip flash memory of the SH7216 The simple flash API standard API for the SH 2 and SH 2A supplied by Renesas Electronics is used to reprogram the on chip flash Target Device SH7216 Contents Te IMTROGUGHION Sys 2utescactcectvecedenssaccndec AEE EAEE TEE OEA 2 2 Specifications of Sample Programs ccccceceeceeseeceeeeeceeeeesaeeeeaeeceeeeseaeeeeaaeseeeeeseeeesaeseeaaesseneesees 3 3 Using the Sample Programista aani eee e Aaaa ANa aaan a EEan 26 4 Notes on Use of Flash Memory ROM essssssssesssesssesesssssrsssrssrnrstnrssnnssrnnnnnnsnnunnnsnnnntnnsnnnnnnnnnnsnnt 26 D Reference Document si cc cals teed eels eee ete E AANER E AAE 27 RO1ANO289EJ0211 Rev 2 11 Page 1 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 1 Introduction 1 1 Specifications In the sample application the user program mode of the SH7216 is used to write data to the user MAT in flash memory ROM The data used to program the ROM is transferred from the host P2. to PT_THREAD Then the next time PT_THREAD is called execution proceeds from PT_WAIT_UNTIL For this reason it is necessary to call PT_THREAD at regular intervals from the main loop The main loop of the flash write controller is declared as a single independent thread in Protothreads RO1AN0289EJ0211 Rev 2 11 Page 19 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Figure 16 shows a flowchart of the main loop of the flash write controller handle_connection PSOCK_BEGIN Wait to receive write data size PSOCK_READBUF Protosockets PT_BEGIN macro Wait until buffer is full size lt OxF6000 als Yes No Is size a multiple of 256 bytes gt Yes remain_recv_byte size Wait to receive write data PSOCK_READBUF Write 256 bytes to ROM R_Flash_Write Yes remain_recv_byte 256 remain_recv_byte lt 0 Write end notification Reset PSOCK_SEND_STR PSOCK_CLOSE PSOCK_END Close socket Protosockest PT END macro Figure 16 Flowchart of Main Loop of Flash Write Controller RO1AN0289EJ0211 Rev 2 11 Page 20 of 28 Apr 06 2011 RENESAS SH7216 Group 2 2 6 Section Settings Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Table 3 lists the sections of the sample program for the SH7216 Tab
3. 6 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 1 4 Related Application Notes 2 H8S 2472 and SH7216 uIP TCP IP Protocol Stack Demonstration SH7216 Group Using RCAN ET in User Program Mode SH7216 Group Using IIC3 in User Program Mode SH7216 Group Using RSPI in User Program Mode SH Family Simple Flash API for SH 2 and SH 2A Specifications of Sample Programs The specifications of the sample program for the SH7216 and the sample program for the host PC used in this sample application are described in this section 2 1 Overall Sequence Figures 2 and 3 show the operation sequence of the sample program for the host PC and the sample program for the SH7216 The arrows between the host PC and the SH7216 indicate TCP data transfers RO1AN0289EJ0211 Rev 2 11 Page 3 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Host PC Initialize Winsock Generate socket Connect to socket Open file Read file Transmit data size Write data size SH7216 Start process Power ON Reset Initialize section Runs from RAM from this point on Open Ethernet driver No Open successful Yes Initialize uip Initialize ROM Initialization successful gt Yes Erase EB05 to EB19 in ROM No Erase successful gt Wait to receive write data size Fi
4. 86 21 5877 1818 Fax 86 21 6887 7858 7898 Renesas Electronics Hong Kong Limited Unit 1601 1613 16 F Tower 2 Grand Century Place 193 Prince Edward Road West Mongkok Kowloon Hong Kong Tel 852 2886 9318 Fax 852 2886 9022 9044 Renesas Electronics Taiwan Co Ltd 7F No 363 Fu Shing North Road Taipei Taiwan Tel 886 2 8175 9600 Fax 886 2 8175 9670 Renesas Electronics Singapore Pte Ltd 1 harbourFront Avenue 06 10 keppel Bay Tower Singapore 098632 Tel 65 6213 0200 Fax 65 6278 8001 Renesas Electronics Malaysia Sdn Bhd Unit 906 Block B Menara Amcorp Amcorp Trade Centre No 18 Jin Persiaran Barat 46050 Petaling Jaya Selangor Darul Ehsan Malaysia Tel 60 3 7955 9390 Fax 60 3 7955 9510 Renesas Electronics Korea Co Ltd 11F Samik Lavied or Bldg 720 2 Yeoksam Dong Kangnam Ku Seoul 135 080 Korea Tel 82 2 558 3737 Fax 82 2 558 5141 2011 Renesas Electronics Corporation All rights reserved Colophon 1 0
5. C via an Ethernet link The application that runs on the host PC uses a socket interface to transfer data by means of the TCP IP protocol The sample program that runs on the SH7216 uses the Ethernet controller EtherC and Ethernet controller direct memory access controller E DMAC to receive the data transferred with the TCP IP protocol Then it writes the data to the user MAT in the ROM Figure shows the system configuration of the sample application Host PC SH7216 On chip ROM Ethernet cable Application EtherC E DMAC On chip RAM Figure 1 System Configuration 1 2 Functions Used e Ethernet controller EtherC e Ethernet controller direct memory access controller E DMAC e Flash memory ROM e On chip RAM e Compare match timer CMT 1 3 Applicable Conditions MCU SH7216 Operating frequency Internal clock 200 MHz Bus clock 50 MHz Peripheral clock 50 MHz Integrated development environment Renesas Electronics High performance Embedded Workshop Ver 4 07 00 007 C compiler Renesas Electronics SuperH RISC engine Family C C Compiler Package Ver 9 03 Release 02 Compile options High performance Embedded Workshop default settings cpu sh2afpu pic 1 object CONFIGDIR FILELEAF obj debug gbr auto chgincpsth errorpath global_volatile 0 opt_range all infinite_loop 0 del_vacant_loop 0 struct_alloc 1 nologo RO1ANO289EJ0211 Rev 2 11 Page 2 of 28 Apr 06 2011 RENESAS SH721
6. ESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Website and Support Renesas Electronics Website http www renesas com Inquiries http www renesas com inquiry All trademarks and registered trademarks are the property of their respective owners RO1AN0289EJ0211 Rev 2 11 Page 28 of 28 Apr 06 2011 RENESAS Revision Record Description Rev Date Page Summary 1 00 Apr 12 10 First edition issued 2 00 Dec 14 10 Standard API used to program and erase on chip flash 2 10 Mar 17 11 Added read after FRQCR settings 2 11 Apr 06 11 Host tool updated A 1 General Precautions in the Handling of MPU MCU Products The following usage notes are applicable to all MPU MCU products from Renesas For detailed usage notes on the products covered by this manual refer to the relevant sections of the manual If the descriptions under General Precautions in the Handling of MPU MCU Products and in the body of the manual differ from each other the description in the body of the manual takes precedence 1 Handling of Unused Pins Handle unused pins in accord with the directions given under Handling of Unused Pins in the manual The input pins of CMOS products are generally in the high impedance state In operation with an unused pin in the open circuit state extra electromagnetic noise is induced in the vicinity of LSI an associated shoot through current flows inter
7. am for the SH7216 The arrows indicate the direction of control Sample program for SH7216 Flash write controller TCP IP protocol stack Flash standard API Ethernet driver SH7216 Figure 5 Structure of Sample Program for SH7216 RO1ANO289EJ0211 Rev 2 11 Page 7 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 2 1 Main Process In order to port uip to the SH7216 it is necessary for the main loop to perform the following two tasks e Checking whether or not an Ethernet frame has arrived from the network e Checking whether the uip timer has timed out If an Ethernet frame has arrived uip_input must be called to notify uip In like manner if the uip timer has timed out uip_periodic must be called to notify uip Figures 6 to 9 are flowcharts of the main process RO1AN0289EJ0211 Rev 2 11 Page 8 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection main Initialize timer Starts 100 msec interval timer using CMT timer_init Set timer timer_set Open Ethernet driver R_Ether_Open Ethernet driver open No successful Initialize uip uip_init Set MAC address pee Set IP address A See figure 8 Set subnet mask J WP eg ed Initialize flash write controller user_app_init PENCERE No Initialization successf
8. andard API supplied by Renesas Electronics is used to program and erase the on chip flash Using the standard API makes it possible to program and erase the on chip flash simply by calling the necessary functions from the user program Table 2 lists the standard API functions used by the sample application Table 2 List of Open Functions of Flash Memory Driver No Function Name Description 1 R_FlashWRITE Writes data in 256 byte units 2 R_FlashERASE Erases data in block units Note For details of the standard API see the related application note SH Family Simple Flash API for SH 2 and SH 2A The user MAT is divided into eight 8 KB blocks nine 64 KB blocks and three 128 KB blocks Programming is done in 256 byte units For details of the block configuration see figure 27 3 in the SH7216 Group Hardware Manual RO1AN0289EJ0211 Rev 2 11 Page 18 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 2 5 Flash Write Controller The flash write controller is a program that corresponds to the application layer of the TCP IP model The program operates as a server application and when launched it maintains a connection on port number 1000 by default When the host PC sends a connect request the program waits to receive data transferred using TCP Once 256 bytes of data the number of bytes in a ROM write unit has been received the program writes it sequentially
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10. enesas Electronics products beyond such specified ranges please evaluate the safety of the final products or system manufactured by you no liability for damages or losses occurring as a result of your noncompliance with applicable laws and regulations Note 2 Renesas Electronics product s means any product developed or manufactured by or for Renesas Electronics The quality grade of each Renesas Electronics product is Standard unless otherwise expressly specified in a Renesas Electronics data sheets or data books etc Standard Computers office equipment communications equipment test and measurement equipment audio and visual equipment home electronic appliances machine tools High Quality Transportation equipment automobiles trains ships etc traffic control systems anti disaster systems anti crime systems safety equipment and medical equipment not specifically Specific Aircraft aerospace equipment submersible repeaters nuclear reactor control systems medical equipment or systems for life support e g artificial life support devices or systems surgical implantations or healthcare intervention e g excision etc and any other applications or purposes that pose a direct threat to human life 8 You should use the Renesas Electronics products described in this document within the range specified by Renesas Electronics especially with respect to the maximum rating operating supply voltage range movem
11. ent power voltage range heat radiation characteristics installation and other product characteristics Renesas Electronics shall have no liability for malfunctions or damages arising out of the 9 Although Renesas Electronics endeavors to improve the quality and reliability of its products semiconductor products have specific characteristics such as the occurrence of failure at a certain rate and malfunctions under certain use conditions Further Renesas Electronics products are not subject to radiation resistance design Please be sure to implement safety measures to guard them against the possibility of physical injury and injury or damage caused by fire in the event of the failure of a Renesas Electronics product such as safety design for hardware and software including but not limited to redundancy fire control and malfunction prevention appropriate treatment for aging degradation or any other appropriate measures 10 Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas Electronics product Please use Renesas Electronics products in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances including without limitation the EU RoHS Directive Renesas Electronics assumes 11 This document may not be reproduced or duplicated in any form in whole or in part without prior written consent of Renesas Elec
12. et Connection R_Ether_Write Read FIFO TR bit in EDRRR 0 xmit _eth_fifoWrite lt Yes Yes Set TR bit in EDRRR to 1 Update descriptor Figure 13 R_Ether_Write Flowchart R01AN0289EJ0211 Rev 2 11 Page 17 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 2 3 TCP IP Protocol Stack The sample application uses uip 1 0 which is open source software as the TCP IP protocol stack Developed by Adam Dunkels uip is a TCP IP protocol stack designed for 8 and 16 bit MCUs The code size of uip is only a few kilobytes and it only uses a few hundred kilobytes of memory making it suitable for systems with limited resources Figure 14 shows the folder structure of uip 1 0 Hipo apps This folder contains TCP IP application samples that nT run on uip ieee doc This folder contains the reference manual and amp smtp sample code E cere lib This folder contains libraries for securing memory m Gp webserver blocks for TCP IP applications gt d a ns uip This folder contains the TCP IP protocol stack itself D uip unix unix This folder contains sample code ported to Unix Figure 14 Folder Structure of uip 1 0 The sample application only uses the uip folder 2 2 4 Programming and Erasing Flash Memory by Using Standard API In the sample application a st
13. eturn USER_APP_NG Return USER_APP_OK Figure 9 Main Process Flowchart 4 4 R01AN0289EJ0211 Rev 2 11 Apr 06 2011 ztENESAS Page 12 of 28 SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 2 2 Ethernet Driver The Ethernet driver is a group of functions that uses the Ethernet controller EtherC and Ethernet controller direct memory access controller E DMAC of the SH7216 to provide Ethernet frame transmit receive functionality The SH7216 has a dedicated DMAC for the Ethernet controller E DMAC to enable efficient transmitting and receiving of Ethernet frames The E DMAC can be controlled easily by using descriptors generated in memory Table 1 lists the functions opened by the Ethernet driver Table 1 List of Ethernet Driver Open Functions No Function Name Description 1 R_Ether_Open Initializes EtherC E DMAC and PHY 2 R_Ether_Close Closes EtherC and E DMAC 3 R_Ether_Read Receives an Ethernet frame 4 R_Ether_Write Transmits an Ethernet frame RO1ANO0289EJ0211 Rev 2 11 Page 13 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection R_Ether_Open Generate receive descriptor _eth_fifolnit Generate transmit descriptor _eth_fifolnit Perform software reset of E DMAC and EtherC EDMAC EDMR BIT SWR 1 Initialize EtherC Initialize E DMAC Initialize PHY
14. f the host PC to the following values IP address 192 168 1 77 Subnet mask 255 255 255 0 2 Connect the PC to the SH7216 CPU board using an Ethernet cable as shown in figure 20 above 3 Open a command prompt window and navigate to the location of the sample program for the host PC SH7216 test_client exe After navigating to the program location launch the sample program for the host PC SH7216 test_client exe specifying as arguments 192 168 1 76 for server IP address 1000 for server port number and lt user defined file name gt as the write data file name The operation are completed successfully Press the Enter key to quit the program 4 Notes on Use of Flash Memory ROM There are important points to be borne in mind when using the flash memory ROM For details see 27 10 Usage Notes in the SH7216 Group Hardware Manual for details RO1AN0289EJ0211 Rev 2 11 Page 26 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 5 Reference Documents e Hardware Manual SH7216 Group Hardware Manual Rev 1 01 The latest version can be downloaded from the Renesas Electronics Web site e SH716 CPU Board User s Manual SH7216 CPU Board ROK572167CO0OIBR User s Manual Rev 0 03 e uip 1 0 Reference Manual The uIP Embedded TCP IP Stack The uIP 1 0 Reference Manual June 2006 RO1ANO289EJ0211 Rev 2 11 Page 27 of 28 Apr 06 2011 REN
15. gure 2 Overall Sequence 1 2 RO1ANO0289EJ0211 Rev 2 11 Apr 06 2011 Page 4 of 28 ztENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Wait to receive data Transmit data Yes Multiple of 256 bytes Size writable to ROM Write data PEIRAL EELE LE LEELEE EE STEE AE ATESAT EPEE EEEIEE NEE PEE le eek Bl oh tit tae Nik td gt 256 bytes received Write data in 256 byte units starting at top of EB05 H 0000A000 in user MAT in ROM Write to ROM ROM write successful Remaining data size gt 0 Write end notification Vv lt Wait to receive write data Exit Figure 3 Overall Sequence 2 2 RO1AN0289EJ0211 Rev 2 11 Apr 06 2011 2tENESAS Page 5 of 28 SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Figure 4 shows the command format for the write data size and write end notification e Write data size The size of the data block is 256 bytes If the write data size is 1 024 bytes 1024 is stored in the data block as ASCII character codes The remaining space is filled with zeros Ethernet header IP header TCP header Data block S WN Transmit source IP Transmit source port address XXXX 192 168 1 77 Destination port Destination IP address 1000 192 168 1 76 256 bytes e Write end notification When proces
16. ign laws or regulations Renesas Electronics has used reasonable care in preparing the information included in this document but Renesas Electronics does not warrant that such information is error free Renesas Electronics assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein Renesas Electronics products are classified according to the following three quality grades Standard High Quality and Specific The recommended applications for each Renesas Electronics product depends on the product s quality grade as indicated below You must check the quality grade of each Renesas Electronics product before using it in a particular application You may not use any Renesas Electronics product for any application categorized as Specific without the prior written consent of Renesas Electronics Further you may not use any Renesas Electronics product for any application for which it is not intended without the prior written consent of Renesas Electronics Renesas Electronics shall not be in any way liable for any damages or losses incurred by you or third parties arising from the use of any Renesas Electronics product for an application categorized as Specific or for which the product is not intended where you have failed to obtain the prior written consent of Renesas Electronics personal electronic equipment and industrial robots designed for life support use of R
17. le 3 Sections of Sample Program for SH7216 No Address Section Name Description 1 0x00000000 DVECTTBL Vector table 2 DINTTBL 3 PResetPRG Reset handler 4 PintPRG Exception handler 5 0x00000A00 P Program area 6 PFRAM Flash memory driver 7 C Constant area 8 C BSEC 9 C DSEC 10 D Initialization data area 11 OxFFF80000 RDVECTTBL Vector table allocated in RAM 12 RDINTTBL 13 RPResetPRG Reset handler allocated in RAM 14 RPIntPRG Exception handler allocated in RAM 15 OxFFF80A00 RP Program area allocated in RAM 16 RPFRAM Flash standard API allocated in RAM 17 RC Constant area allocated in RAM 18 RC BSEC 19 RC DSEC 20 R Initialization data area allocated in RAM 21 OxFFF88F00 B Uninitialized data area 22 OxFFF8DA00 B RX_DESC Descriptor area for Ethernet 23 B_TX_DESC Must be allocated at 16 byte boundary 24 B RX_BUFF Buffer area for Ethernet 25 B_TX_BUFF 26 OxFFF8F800 S Stack area The program must be run from RAM because it erases and programs the user MAT in the ROM Therefore numbers 1 to 10 in the user MAT in the ROM are transferred to numbers 11 to 20 in RAM immediately after the power on reset startup and the program runs from RAM from that point forward R01AN0289EJ0211 Rev 2 11 Apr 06 2011 Page 21 of 28 ztENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 3 Sample Program fo
18. nally and malfunctions occur due to the false recognition of the pin state as an input signal become possible Unused pins should be handled as described under Handling of Unused Pins in the manual 2 Processing at Power on The state of the product is undefined at the moment when power is supplied The states of internal circuits in the LSI are indeterminate and the states of register settings and pins are undefined at the moment when power is supplied In a finished product where the reset signal is applied to the external reset pin the states of pins are not guaranteed from the moment when power is supplied until the reset process is completed In a similar way the states of pins in a product that is reset by an on chip power on reset function are not guaranteed from the moment when power is supplied until the power reaches the level at which resetting has been specified 3 Prohibition of Access to Reserved Addresses Access to reserved addresses is prohibited The reserved addresses are provided for the possible future expansion of functions Do not access these addresses the correct operation of LSI is not guaranteed if they are accessed 4 Clock Signals After applying a reset only release the reset line after the operating clock signal has become stable When switching the clock signal during program execution wait until the target clock signal has stabilized When the clock signal is generated with an external resonato
19. phy_init Start auto negotiation phy_set_autonegotiate EtherC ECMR BIT DM 1 EtherC ECMR BIT RE 1 EtherC ECMR BIT TE 1 EDMAC EDRRR LONG 0x00000001 return R ETHER_OK return R ETHER_ERROR Figure 10 R_Ether_Open Flowchart RO1AN0289EJ0211 Rev 2 11 Page 14 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection R_Ether_Close Disable receive and transmit functions EtherC ECMR LONG 0x00000000 return RLETHER_OK Figure 11 R_Ether_Close Flowchart RO1AN0289EJ0211 Rev 2 11 Page 15 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection R_Ether_Read receivesize 0 flag 1 readcount 0 4 No Yes Read FIFO Yy _eth_fifoRead return receivesize Yes readcount gt 2 amp receivesize 0 return RLETHER_OK Frame not received No Frame error Clear descriptor error flag return RLETHER_OK N No 9 RR bit in EDRRR 0 RR bit in EDRRR 0 Yes Set RR bit in EDRRR to 1 Set RR bit in EDRRR to 1 AA Vv Yy Figure 12 R_Ether_Read Flowchart R01AN0289EJ0211 Rev 2 11 Page 16 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethern
20. program that runs on the host PC _tmain Argument gt 4 Initialize Winsock WSAStartup Display error message Initialization successful gt Generate socket socket Generation successful gt return 1 Figure 17 Flowchart of Host PC Sample Program 1 3 RO1AN0289EJ0211 Rev 2 11 Page 23 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Connect to socket connect Connection successful Open write data file fopen_s No Open successful Initialize transmit data buffer to zero No Yes Read finished Read write data file fread Normal stream Yes Data size 1 007 616 bytes or less Yes No No Close file fclose Data size other than 0 Yes Data size is multiple of 256 No Close file fclose No gt Open socket closesocket e Round up data size to multiple of 256 return 1 Figure 18 Flowchart of Host PC Sample Program 2 3 R01AN0289EJ0211 Rev 2 11 Apr 06 2011 ztENESAS Page 24 of 28 SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Transmit write data size send Transmit write data send T
21. r or from an external oscillator during a reset ensure that the reset line is only released after full stabilization of the clock signal Moreover when switching to a clock signal produced with an external resonator or by an external oscillator while program execution is in progress wait until the target clock signal is stable 5 Differences between Products Before changing from one product to another i e to one with a different type number confirm that the change will not lead to problems The characteristics of MPU MCU in the same group but having different tyoe numbers may differ because of the differences in internal memory capacity and layout pattern When changing to products of different type numbers implement a system evaluation test for each of the products Notice All information included in this document is current as of the date this document is issued Such information however is subject to change without any prior notice Before purchasing or using any Renesas Electronics products listed herein please confirm the latest product information with a Renesas Electronics sales office Also please pay regular and careful attention to additional and different information to be disclosed by Renesas Electronics such as that disclosed through our website Renesas Electronics does not assume any liability for infringement of patents copyrights or other intellectual property rights of third parties by or arising from the us
22. r Host PC The sample program for the host PC is a program that corresponds to the application layer of the TCP IP model and operates as a client application The program is a console application When it is launched the user specifies the server IP address server port number and write data file name The program then attempts to connect to the specified IP address and port number When it succeeds it transmits by TCP the write data file in the user MAT in the ROM to the sample program for the SH7216 The maximum size of the write data file is 1 007 616 bytes The program uses the Winsock library to implement data transfer using TCP Winsock is a technical specification that defines the method used by Windows network software to access network services It defines a standard interface between TCP IP client applications running on Windows and the TCP IP protocol stack The interface is based on the socket API model used for program communication in BSD UNIX The operating environment and development environment of the program are shown in table 4 Table 4 Operating Environment and Development Environment of Program Operating environment CPU x86 OS Microsoft Windows XP Development environment Microsoft Visual Studio 2005 RO1ANO289EJ0211 Rev 2 11 Page 22 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Figures 17 18 and 19 show a flowchart of the sample
23. ransmit successful No Yes No No Transmit finished Yes Receive write end notification recv No Receive successful Yes Close transmit receive socket shutdown No Close successful Yes Open socket closesocket Open socket closesocket No Open successful Yes Close Winsock WSACleanup No Close successful Yes return 0 return 1 Figure 19 Flowchart of Host PC Sample Program 3 3 RO1AN0289EJ0211 Rev 2 11 Apr 06 2011 RENESAS Page 25 of 28 SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 3 Using the Sample Program This section describes how to use the sample program for the SH7216 and the sample program for the host PC Figure 20 shows a device configuration diagram Ethernet cable Host PC Windows XP SH7216 CPU board Figure 20 Device Configuration Diagram Before performing the steps below confirm that the switches on the SH7216 CPU board are in their default setting positions For information on the default settings see 3 2 6 Switch and LED Functions in the SH7216 CPU Board ROK572167COO1BR User s Manual Rev 0 03 3 1 Usage Perform the steps below to check operation using the PC Note Make sure to write the sample code to the on chip flash before performing the steps below 1 Set the IP address and subnet mask o
24. sing completes normally The flash writing was completed is stored in the data block as ASCII character codes The size of the data block is 32 bytes Ethernet header IP header TCP header Data block S SS Transmit source IP Transmit source port address 1000 192 168 1 76 Destination port Destination IP address xxxx 192 168 1 77 32 bytes Figure 4 Command Format RO1ANO0289EJ0211 Rev 2 11 Page 6 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection 2 2 Sample Program for SH7216 The sample program for the SH7216 comprises the main process flash write controller TCP IP protocol stack Ethernet driver and flash memory driver The program area constant area and initialization data area of the program are allocated within blocks EBO0 to EB04 addresses H 00000000 to H 00009FFF of the user MAT in ROM The SH7216 cannot use a program allocated to the user MAT to program or erase the user MAT Therefore this program transfers the contents of the program area constant area and initialization data area to the on chip RAM addresses H FFF80000 to H FFF8FFFF immediately after the power on reset and the program runs from the on chip RAM from that point onward The sample program for the SH7216 functions as a server The IP address and port number are fixed at 192 168 1 76 and 1000 respectively Figure 5 shows the structure of the sample progr
25. to the user MAT starting at EB05 H 0000A000 The program uses the Protosockets library a socket interface opened by uip to implement data transfer using TCP The Protosockets library provides a socket interface similar to the BSD socket API Some elements of the socket interface are blocked after calling a function such as recv and some cannot be implemented in a single thread environment with no OS The Protosockets library uses a module called Protothreads to overcome these limitations Protothreads is a module that was developed by Adam Dunkels the developer of uip It makes it possible to perform programming in a single thread environment with no OS as if it were a multithreaded environment Figure 15 shows an sample code listing of a thread using Protothreads 01 include pt h 03 struct pt pt 04 struct timer timer 05 06 PT_THREAD example struct pt pt 07 08 PT_BEGIN pt 09 10 while 1 11 if initiate _io 12 timer start amp timer 13 PT WAIT UNTIL pt 14 io _completed 15 timer expired amp timer 16 read _data 17 18 19 PT_END pt 20 Figure 15 Protothreads Sample Code It is necessary to declare PT_BEGINO at the beginning of the thread entry function and PT_END at the end In the code sample above a macro PT_WAIT_UNTIL which causes processing to wait is called in line 13 However in actual operation control returns
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27. ul Yes o return 1 Figure 6 Main Process Flowchart 1 4 R01AN0289EJ0211 Rev 2 11 Page 9 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Receive frame R_Ether_Read Received uip_len gt 0 TCP packed arrived ived uip_arp_ipin ARP packed arrived uip_arp_arpin uip_input Transmit data present uip_len gt 0 Yes i uip_arp_out Transmit frame Transmit data present uip_len gt 0 Transmit frame R_Ether_Write R_Ether_Write Q Figure 7 Main Process Flowchart 2 4 R01AN0289EJ0211 Rev 2 11 Page 10 of 28 Apr 06 2011 RENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection ee No periodic_timer timeout gt Reset timer timer_reset arp_timer timeout uip_periodic i Reset timer timer_reset uip_arp_timer Transmit frame R_Ether_Write i Figure 8 Main Process Flowchart 3 4 RO1ANO289EJ0211 Rev 2 11 Page 11 of 28 Apr 06 2011 2tENESAS SH7216 Group Reprogramming Flash Memory in User Program Mode Using an Ethernet Connection Set erase start block Erase block R_FlashErase No Block erase successful Erase end block No Erasure of all target blocks complete i uip_listen j R
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