DE1のFT245向けD2XXドライバ使用通信テスト | Codetter（こーどったー）

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#include<windows.h>
#include<stdio.h>
#include<time.h>
#include "ftd2xx.h"
#pragma comment(lib, "ftd2xx.lib")
int main(void)
{
    char dbuf[64];
    FT_ListDevices(0, dbuf, FT_LIST_BY_INDEX | FT_OPEN_BY_DESCRIPTION);
    printf("%s\n", dbuf);
    FT_STATUS ftStatus;
    FT_HANDLE ftHandle;
    ftStatus = FT_OpenEx(dbuf, FT_OPEN_BY_DESCRIPTION, &ftHandle);
    if(ftStatus!=FT_OK){
        printf("Failed to open port\n");
        return 0;
    }
    FT_ResetDevice(ftHandle);
    FT_Purge(ftHandle, FT_PURGE_RX | FT_PURGE_TX);
    FT_SetTimeouts(ftHandle, NULL, NULL);
    ftStatus = FT_SetBaudRate(ftHandle, FT_BAUD_921600);
    if(ftStatus!=FT_OK){
        printf("Failed to set BaudRate\n");
    }
    ftStatus = FT_SetBitMode(ftHandle, 0xFF/*1=out 0=in*/, 1/*bit-bang mode on*/);
    if(ftStatus!=FT_OK){
        printf("Failed to set bit mode\n");
    }
    int i;
    int total = 0;
    const int size = 62*16;
    unsigned char buf[size];
    DWORD send_size;
    FT_STATUS ftTxStatus;
    for(i=0; i<size; i++) buf[i] = rand();
    buf[size-1] = 0;
clock_t st, et;
st = clock();
    for(i=0; i<10; i++){
        ftTxStatus = FT_Write(ftHandle, buf, size, &send_size);
        if(ftTxStatus!=FT_OK){
            printf("send err\n");
        }
        if(send_size!=size){
            printf("send err\n");
        }
        total += size;
    }
et = clock();
clock_t u = et - st;
double s = u / 1000.0;
printf("%0.1f Kbps\n", total/s/1024);
    FT_Close(ftHandle);
    return 0;
}
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