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fixed WRITE_REGS(16) function #8

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fixed WRITE_REGS(16) function #8

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d081505
fixed WRITE_REGS(16) function
wiciu15 Feb 27, 2022
ab26806
Update README.md
wiciu15 Feb 27, 2022
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13 changes: 12 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,18 @@ int mbus_send(const mbus_t context,const uint8_t* data, const uint16_t size){

/* Just ptr on any external object, you can get it by context */
mb_config.device = (void*) 0;


/*set up buffers for received and sent modbus data, declare MYMODBUSSENDBUFFER globally with adequate size*/
uint8_t * pmodbusSendBuffer;
pmodbusSendBuffer=&MYMODBUSSENDBUFFER;
mb_config.sendbuf = pmodbusSendBuffer;
mb_config.sendbuf_sz = sizeof(MYMODBUSSENDBUFFER);

uint8_t * pmodbusRecvBuffer;
pmodbusRecvBuffer=&MYMODBUSRECEIVEBUFFER;
mb_config.recvbuf = pmodbusRecvBuffer;
mb_config.recvbuf_sz = sizeof(MYMODBUSRECEIVEBUFFER);

/* This that function for sending some data (use sendbuf for buf) */
mb_config.send = &mbus_send;

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18 changes: 9 additions & 9 deletions src/modbus.c
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Expand Up @@ -173,15 +173,15 @@ inline mbus_status_t mbus_poll_response(mbus_t mb_context) {
return mbus_send_data(mb_context, 6);

case MBUS_FUNC_WRITE_REGS:
value = (uint16_t *)ctx->conf.recvbuf;
for (int i = 0; i < ctx->header.num; i++) {
ctx->conf.write(la + i, *value);
}
ctx->conf.sendbuf[2] = ctx->header.addr >> 8;
ctx->conf.sendbuf[3] = ctx->header.addr & 0xFF;
ctx->conf.sendbuf[4] = ctx->header.num >> 8;
ctx->conf.sendbuf[5] = ctx->header.num & 0xFF;
return mbus_send_data(mb_context, 6);
for (int i = 0; i < ctx->header.num; i++) {
uint16_t regvalue = ((uint16_t)ctx->conf.recvbuf[i*2]<<8)|((uint16_t)ctx->conf.recvbuf[i*2+1]);
ctx->conf.write(la + i, regvalue);
}
ctx->conf.sendbuf[2] = ctx->header.addr >> 8;
ctx->conf.sendbuf[3] = ctx->header.addr & 0xFF;
ctx->conf.sendbuf[4] = ctx->header.num >> 8;
ctx->conf.sendbuf[5] = ctx->header.num & 0xFF;
return mbus_send_data(mb_context, 6);
} // end of switch
}
}
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