RH850 F1KM serial bootloader C language and C # language bootloader PC serial communication program end

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Today I want to introduce RH850 bootloader only recently completed a serial bootloader. It RL78 bootloader is very similar, also in two parts, RH850 MCU end of the boot program rh850f1kmBoot, the other part is the PC host program rh850Loader with a communication agreement between them, communication protocol as follows:

0x6F: HAND_SHAKE (handshake, or call update request)

0x02: WR_MEM (Flash programming)

0x03: ER_MEM (Flash erase)

0x04: VF_MEM (Flash verification)

0x1F: RUN_APP (Jump to application)

rh850f1kmBoot development environment:

IDE： CS+ for CC V7.00.00 [13 Jun 2018]

Compiler: CC-RH V2.00.00

MCU: RH850 F1KM R7F701684

It uses flash library Renesas official offer: RENESAS_FCL_RH850_T01_V2.12

rh850f1kmBoot memory map (code flash range): 0x0000~0x17FFF;

And adds the following ROM sections:

                               R_FCL_CODE_ROM.text,                    &
                               R_FCL_CONST.const,                      &
                               R_FCL_CODE_USRINT.text,                 &
                               R_FCL_CODE_USR.text,                    &
                               R_FCL_CODE_RAM.text,                    &
                               R_FCL_CODE_ROMRAM.text,                 &
                               R_FCL_CODE_RAM_EX_PROT.text

And RAM sections:

FCL_RESERVED.bss/FEDE0000, &

R_FCL_DATA.bss, &
.stack.bss /FEDE8000

Are provided above with reference to Renesas flash library pacakge (FCL) inside the sample to do. Configuring the linker option CS + works well in these settings on it.

Configured, the rest is completed code.

if (R_UART1_RcvFlag())
    {
        if (BTLD_FramePtr == 0)
        {
            uint8_t sof = R_UART1_FlagedReceive();
            if ( sof != 0x02 && sof != 0x03 && sof != 0x04 && sof != 0x1F )
            {
                ;
            }
            else
            {
                BTLD_ReceiveFrame[BTLD_FramePtr++] = sof;
            }
        }
        else
        {
            BTLD_ReceiveFrame[BTLD_FramePtr++] = R_UART1_FlagedReceive();
        }
    }
    if (BTLD_FramePtr == FRAME_BUFF_SIZE)
    {
        uint8_t cmd = BTLD_ReceiveFrame[CMD_INDEX];
        uint8_t addL = BTLD_ReceiveFrame[ADDRL_INDEX];
        uint8_t addH = BTLD_ReceiveFrame[ADDRH_INDEX];
        uint8_t addU = BTLD_ReceiveFrame[ADDRU_INDEX];
        uint8_t addM = BTLD_ReceiveFrame[ADDRM_INDEX];
        uint32_t add32 = ((uint32_t)addM << 24)|((uint32_t)addU << 16)|((uint32_t)addH << 8) | addL;
        BTLD_FramePtr = 0;
        switch (cmd)
        {
            case ER_MEM:
                BTLD_FlashErase(add32);
                resetDataBuffer(BTLD_ReceiveFrame, FRAME_BUFF_SIZE);
                break;
            case WR_MEM:
                BTLD_FlashWrite(add32);
                resetDataBuffer(BTLD_ReceiveFrame, FRAME_BUFF_SIZE);
                break;
            case VF_MEM:
                BTLD_FlashVerify(add32);
                break;
            case RUN_APP:
                Jump_To_Application(add32);
                break;
            default:
                break;
        }
    }

The above is achieved rh850f1kmBoot chip end. PC end rh850Loader is implemented in C #. After loading the hex address in accordance with the Agreement and data transmission via RS232.
RS232 configuration is as follows:. 19200-8-None-1- None (19200bps Baud Rate I is the most common of the UART).

rh850Loader with UI interface:

RH850 F1KM serial bootloader C language and C # language bootloader PC serial communication program end

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