void nqueens_by_level(std::vector<unsigned int> pos, unsigned int start_level,
unsigned int max_level,
void (* const success_func)(std::vector<unsigned int>&)) {
if(start_level==max_level){
success_func(pos);
return;
}
for(uint col=0; col<pos.capacity(); col++){
if(isValid(col, start_level, pos)){
pos[start_level]=col;
nqueens_by_level(pos, start_level+1, max_level, success_func);
}
}
}
void i2cman_handler()
{
ROM_I2CMasterIntClear(I2C_PORT);
if(current_op == end || current_op == 0)
return; // do absolutely nothing (irq may be called after aborting)
uint32_t error = finish_op(current_op);
if(error != I2C_MASTER_ERR_NONE)
{
stop();
if(error & I2C_MASTER_ERR_ARB_LOST)
{
if(error_func)
error_func(I2C_ARBLOST);
}
else
{
// error, abort completely
//kill_op(current_op);
// bad bad bad!
if(error_func)
error_func(I2C_NOACK);
}
return;
}
current_op ++;
if(current_op == end)
{
stop(); // all done
if(success_func)
success_func();
return;
}
// otherwise, process the next op
start_op(current_op);
}
