File content as of revision 2:0cdac6bcc534:

// Simple USBHost for FRDM-KL46Z
#include "USBHost.h"
#include <algorithm>

template <bool>struct CtAssert;
template <>struct CtAssert<true> {};
#define CTASSERT(A) CtAssert<A>();


#ifdef _USB_DBG
#define USB_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\n");} while(0);
#define USB_DBG_HEX(A,B) debug_hex(A,B)
void debug_hex(uint8_t* buf, int size);
#else
#define USB_DBG(...) while(0)
#define USB_DBG_HEX(A,B) while(0)
#endif

#define USB_TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
#define USB_TEST_ASSERT_FALSE(A) USB_TEST_ASSERT(!(A))

USBHost* USBHost::inst = NULL;

USBHost* USBHost::getHostInst()
{
    if (inst == NULL) {
        inst = new USBHost();
        inst->init();
    }
    return inst;
}

USBHost::USBHost() {
}

/* virtual */ bool USBHost::enumeration() {
    uint8_t desc[64];
    MaxPacketSize0 = 8;
    dev_addr = 0;
    USB0->ADDR = (lowSpeed ? USB_ADDR_LSEN_MASK : 0x00) | USB_ADDR_ADDR(dev_addr);
    wait_ms(100);
    SETUP_PACKET setup_get_descriptor = {0x80, GET_DESCRIPTOR, 1<<8, 0, 0};
    int result = ControlRead(&setup_get_descriptor, desc, 8);
    if (result < 8) {
        USB_DBG("result=%d %02x", result, LastStatus);
        return false;
    }
    USB_DBG_HEX(desc, result);
    MaxPacketSize0 = desc[7];

    SETUP_PACKET setup_set_address = {0x00, SET_ADDRESS, 1, 0, 0};
    result = ControlWrite(&setup_set_address);
    if (result < 0) {
        USB_DBG("result=%d %02x", result, LastStatus);
        return false;
    }
    wait_ms(100);
    dev_addr = 1;

    result = ControlRead(&setup_get_descriptor, desc, sizeof(desc));
    if (result < 8) {
        USB_DBG("result=%d", result);
        return false;
    }
    USB_DBG_HEX(desc, result);

    setup_get_descriptor.wValue = 2<<8; // config descriptor
    result = ControlRead(&setup_get_descriptor, desc, 4);
    if (result != 4) {
        USB_DBG("result=%d", result);
        return false;
    }
    USB_DBG_HEX(desc, 4);

    int TotalLength = desc[2]|desc[3]<<8;
    uint8_t* buf = new uint8_t[TotalLength];
    result = ControlRead(&setup_get_descriptor, buf, TotalLength);
    if (result != TotalLength) {
        USB_DBG("result=%d TotalLength=%d %02x", result, TotalLength, LastStatus);
        return false;
    }
    USB_DBG_HEX(buf, TotalLength);

    for(int i = 0; i < TotalLength; ) {
        int Length = buf[i];
        uint8_t DescriptorType = buf[i+1];
        if (DescriptorType == 0x05) { // endpoint
            uint8_t EndpointAddress = buf[i+2];
            uint8_t Attributes = buf[i+3];
            if (Attributes == 0x03) { // interrupt
                if (EndpointAddress & 0x80) {
                    ep_int_in = EndpointAddress;
                }
            } else if (Attributes == 0x02) { // bulk
                if (EndpointAddress & 0x80) {
                    ep_bulk_in = EndpointAddress;
                } else {
                    ep_bulk_out = EndpointAddress;
                }
            }
        }
        USB_DBG_HEX(buf+i, Length);
        i += Length;
    }
    delete[] buf;

    // config = 1
    SETUP_PACKET setup_set_config = {0x00, SET_CONFIGURATION, 1, 0, 0};
    result = ControlWrite(&setup_set_config);
    if (result < 0) {
        USB_DBG("set config: %02x", LastStatus);
        if (lowSpeed && LastStatus == STALL) { // TODO:
            wait_ms(100);
            return true;
        }
        return false;
    }
    wait_ms(100);
    return true;
}

int USBHost::ControlRead(SETUP_PACKET* setup, uint8_t* data, int size) {
    setAddr(dev_addr);
    token_setup(setup, size); // setup stage
    if (LastStatus != ACK) {
        USB_DBG("setup %02x", LastStatus);
        return -1;
    }
    rx_data01[0] = DATA1;
    int read_len = 0;
    while(read_len < size) {
        int size2 = std::min(size-read_len, MaxPacketSize0);
        int result = token_in(0, data+read_len, size2);
        //USB_DBG("token_in result=%d %02x", result, LastStatus);
        if (result < 0) {
            USB_DBG("token_in %d/%d %02x", read_len, size, LastStatus);
            return result;
        }
        read_len += result;
        if (result < MaxPacketSize0) {
            break;
        }
    }    
    tx_data01[0] = rx_data01[0];
    int result = token_out(0); // status stage
    if (result < 0) {
        USB_DBG("status token_out %02x", LastStatus);
        if (LastStatus == STALL) {
            return read_len;
        }
        return result;
    }
    return read_len;
}

int USBHost::ControlWrite(SETUP_PACKET* setup, uint8_t* data, int size) {
    setAddr(dev_addr);
    token_setup(setup, size); // setup stage
    if (LastStatus != ACK) {
        USB_DBG("setup %02x", LastStatus);
        return -1;
    }

    tx_data01[0] = DATA1;
    int write_len = 0;
    if (data != NULL) {
        write_len = token_out(0, data, size);
        if (write_len < 0) {
            return -1;
        }
    }
    rx_data01[0] = tx_data01[0];
    int result = token_in(0); // status stage
    if (result < 0) {
        return result;
    }
    return write_len;
}

int USBHost::InterruptRead(uint8_t* data, int size) {
    setAddr(dev_addr);
    setEndpoint();
    const int retryLimit = 0;
    return token_in(ep_int_in & 0x7f, data, size, retryLimit);
}

int USBHost::BulkRead(uint8_t* data, int size) {
    setAddr(dev_addr);
    setEndpoint();
    const int max_packet_size = 64;
    int read_len = 0;
    while(read_len < size) {
        int size2 = std::min(size-read_len, max_packet_size);
        int result = token_in(ep_bulk_in & 0x7f, data+read_len, size2);
        if (result < 0) {
            //USB_DBG("token_in result=%d %02x", result, LastStatus);
            return result;
        }
        read_len += result;
        if (result < max_packet_size) {
            break;
        }
    }
    return read_len;
}

int USBHost::BulkWrite(const uint8_t* data, int size) {
    setAddr(dev_addr);
    setEndpoint();
    const int max_packet_size = 64;
    int write_len = 0;
    while(write_len < size) {
        int size2 = std::min(size-write_len, max_packet_size);
        int result = token_out(ep_bulk_out, data+write_len, size2);
        if (result < 0) {
            //USB_DBG("token_in result=%d %02x", result, LastStatus);
            return result;
        }
        write_len += result;
        if (result < max_packet_size) {
            break;
        }
    }
    return write_len;
}