R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode

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R8C/13 Group Flash Rewrite Using EW1 Mode (Data "FFh" Search) 4.1 Function Table Declaring Outline Argument Use Variable (Global) Return Value Function Description void write_address_init(void) Reset write address to default Argument Type Meaning None Variable Type Contents of Use unsigned char *write_addr Initial Setting unsigned char block_select Initial Setting Return Value Type Value Meaning None Search the empty records. Set the write address (write_addr) and block select (block_select) Declaring Outline Argument Use Variable (Global) Return Value Function Description unsigned char flash_write(unsigned char *data) Data Write Control Argument Type unsigned char *data Meaning Table Starting Address of Write Data Variable Type Contents of Use unsigned char *write_addr Reference/Setting unsigned char block_select Reference/Setting Return Value Type Value Meaning COMPLETE Completed successfully unsigned char PROGRAM_ERR Write Error (1) ERASE_ERR Erase Error (1) Update the write address (write_addr) after writing the reecord data. When the block select has no empty records, erase unused blocks and change the block select (block_select). NOTES: 1. When write or erase error occurs, PROGRAM_ERR+ERASE_ERR is indicated. Declaring Outline Argument Use Variable (Global) Return Value Function Description unsigned char block_erase(unsigned char *ers_addr) Block Erase Process Argument Type unsigned char *ers_addr Meaning Starting Address of Erase Block Variable Type Contents of Use None Return Value Type Value Meaning unsigned char COMPLETE Completed successfully ERASE_ERR Erase Error Erase the specified block in EW1 mode Declaring Outline Argument Use Variable (Global) Return Value Function Description unsigned char data_write(unsigned char *write_data) Data Write Process Argument Type unsigned char *write_data Meaning Table Starting Address of Write Data Variable Type Contents of Use unsigned char *write_addr Reference Return Value Type Value Meaning unsigned char COMPLETE Completed successfully PROGRAM_ERR Write Error Write data for one record from write address (write_addr) in EW1 mode. REJ05B0444-0110Z/Rev.1.10 August 2004 Page 12 of 25
R8C/13 Group Flash Rewrite Using EW1 Mode (Data "FFh" Search) Declaring Outline Argument Use Variable Return Value Function Description void make_data(unsigned char *write_data) Create the write record data in the data flash Argument Type unsigned char *data Meaning Table Starting Address of Write Data Variable Type Contents of Use None Return Value Value Meaning None Create the write record data in the data flash. In this application note, nothing is processed. Add the processes if needed. REJ05B0444-0110Z/Rev.1.10 August 2004 Page 13 of 25
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R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode

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