mbedtest.c

#include <stdio.h>
#include <libusb-1.0/libusb.h>
#include <unistd.h>

#define MBED_VENDOR_ID  0x1f00
#define MBED_PRODUCT_ID 0x2012
#define IF_CDCACM       0
#define IF_CDCDATA      1
#define BUFFER          1024
#define EPIN            0x82
#define EPOUT           0x02
#define ACM_CTRL_DTR    0x01
#define ACM_CTRL_RTS    0x02

/* - set line encoding: here 9600 8N1
 * 9600 = 0x2580 ~> 0x80, 0x25 in little endian
 */
unsigned char encoding[] = { 0x80, 0x25, 0x00, 0x00, 0x00, 0x00, 0x08 };

unsigned char gBuffer[BUFFER];

int main()
{
    libusb_context *ctx = NULL;
    libusb_device **devs;
    libusb_device *dev;
    libusb_device_handle* handle;
    struct libusb_device_descriptor desc;
    struct libusb_config_descriptor *config;
    static int xfered;
    int err;
    int if_num;

    if(libusb_init(&ctx) < 0){
       printf("libusb_init failed\n");
       return 1;
    }
    libusb_set_debug(ctx, 3);
    if((handle = libusb_open_device_with_vid_pid(ctx, MBED_VENDOR_ID,  MBED_PRODUCT_ID)) == NULL) {
        printf("mbed not found.\n");
        return(1);
    }
    //detach kernel driver(cdc_acm) and clime it.
    //if0:cdc acm
    //if1:cdc data
    for (if_num = 0; if_num < 2; if_num++) {
        if (libusb_kernel_driver_active(handle, if_num)){
            libusb_detach_kernel_driver(handle, if_num);
        }
        err = libusb_claim_interface(handle, if_num);
        if(err != 0 ){
            printf("libusb_clain_inteface failed.(%d)\n", err);
        }
    }
/*
    err = libusb_set_interface_alt_setting(handle, IF_CDCDATA, 0);
    if(err != 0 ){
        printf("libusb_set_interface_alt_setting failed.(%d)\n", err);
    }
*/
    err = libusb_control_transfer(handle, 0x21, 0x22, ACM_CTRL_DTR | ACM_CTRL_RTS, IF_CDCACM, NULL, 0, 0);
    err = libusb_control_transfer(handle, 0x21, 0x20, 0, IF_CDCACM, encoding, sizeof(encoding), 0);
printf("Begin Bulk xfer\n");
    while(1){
        err = libusb_bulk_transfer(handle, EPIN, gBuffer, BUFFER, &xfered, 100);
        if(err == LIBUSB_ERROR_TIMEOUT){
            continue;
        }
        if(err == 0){
            printf("%d bytes rcvd : %02X %02X\n", xfered, gBuffer[0], gBuffer[1]);
            break;
        }else{
            printf("libusb_bulk_transfer failed.(%d)\n", err);
        }
    }

    //release and close USB
    err = libusb_release_interface (handle, IF_CDCDATA);
    err = libusb_release_interface (handle, IF_CDCDATA);
    libusb_close(handle);

    libusb_exit(ctx);
    return 0;
}