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/*
Created: September 2012
by ihsan Kehribar <ihsan@kehribar.me>
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
/***************************************************************/
/* See the micronucleus_lib.h for the function descriptions/comments */
/***************************************************************/
#include "micronucleus_lib.h"
#include "littleWire_util.h"
micronucleus* micronucleus_connect()
{
micronucleus *nucleus = NULL;
struct usb_bus *busses;
// intialise usb and find micronucleus device
usb_init();
usb_find_busses();
usb_find_devices();
busses = usb_get_busses();
struct usb_bus *bus;
for (bus = busses; bus; bus = bus->next)
{
struct usb_device *dev;
for (dev = bus->devices; dev; dev = dev->next)
{
/* Check if this device is a micronucleus */
if (dev->descriptor.idVendor == MICRONUCLEUS_VENDOR_ID && dev->descriptor.idProduct == MICRONUCLEUS_PRODUCT_ID)
{
nucleus = malloc(sizeof(micronucleus));
nucleus->version.major = (dev->descriptor.bcdUSB >> 8) & 0xFF;
nucleus->version.minor = dev->descriptor.bcdUSB & 0xFF;
nucleus->device = usb_open(dev);
// get nucleus info
unsigned char buffer[4];
int res = usb_control_msg(nucleus->device, 0xC0, 0, 0, 0, buffer, 4, MICRONUCLEUS_USB_TIMEOUT);
assert(res == 4);
nucleus->flash_size = (buffer[0]<<8) + buffer[1];
nucleus->page_size = buffer[2];
nucleus->pages = (nucleus->flash_size / nucleus->page_size);
if (nucleus->pages * nucleus->page_size < nucleus->flash_size) nucleus->pages += 1;
nucleus->write_sleep = buffer[3];
nucleus->erase_sleep = nucleus->write_sleep * nucleus->pages;
}
}
}
return nucleus;
}
int micronucleus_eraseFlash(micronucleus* deviceHandle)
{
int res;
res = usb_control_msg(deviceHandle->device, 0xC0, 2, 0, 0, NULL, 0, MICRONUCLEUS_USB_TIMEOUT);
// give microcontroller enough time to erase all writable pages and come back online
delay(deviceHandle->erase_sleep);
if(res!=0)
return -1;
else
return 0;
}
int micronucleus_writeFlash(micronucleus* deviceHandle, unsigned int program_size, unsigned char* program)
{
unsigned char page_length = deviceHandle->page_size;
unsigned char page_buffer[page_length];
unsigned int address; // overall flash memory address
unsigned int page_address; // address within this page when copying buffer
unsigned int res;
for (address = 0; address < deviceHandle->flash_size; address += deviceHandle->page_size) {
// work around a bug in older bootloader versions
if (deviceHandle->version.major == 1 && deviceHandle->version.minor <= 2
&& address / deviceHandle->page_size == deviceHandle->pages - 1) {
page_length = deviceHandle->flash_size % deviceHandle->page_size;
}
// copy in bytes from user program
for (page_address = 0; page_address < page_length; page_address += 1) {
if (address + page_address > program_size) {
page_buffer[page_address] = 0xFF; // pad out remainder with unprogrammed bytes
} else {
page_buffer[page_address] = program[address + page_address]; // load from user program
}
}
// ask microcontroller to write this page's data
res = usb_control_msg(deviceHandle->device,
USB_ENDPOINT_OUT| USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1,
page_length, address,
page_buffer, page_length,
MICRONUCLEUS_USB_TIMEOUT);
// give microcontroller enough time to write this page and come back online
delay(deviceHandle->write_sleep);
if (res != 64) return -1;
}
return 0;
}
int micronucleus_startApp(micronucleus* deviceHandle)
{
int res;
res = usb_control_msg(deviceHandle->device, 0xC0, 4, 0, 0, NULL, 0, MICRONUCLEUS_USB_TIMEOUT);
if(res!=0)
return -1;
else
return 0;
}
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