Created
June 1, 2015 20:33
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// from crates.io | |
//extern crate mmap; | |
//extern crate libc; | |
//mod fpga_awg; | |
//fn main() { | |
// let mut awg = fpga_awg::fpgaAwg::new(); | |
// let mut params: fpga_awg::awgParam = fpga_awg::awgParam::default(); | |
//let mut data: [i32; fpga_awg::n] = [0; fpga_awg::n]; | |
//awg.syntesize_signal(1.0, 1000.0, &mut data, &mut params); | |
//awg.write_data_fpga(0, &mut data, &mut params); | |
//} | |
// from crates.io | |
extern crate mmap; | |
extern crate libc; | |
mod fpga_awg; | |
use std::ptr; | |
use std::fs; | |
use std::io::{Write, SeekFrom, Seek}; | |
use std::os::unix::prelude::AsRawFd; | |
use mmap::{MemoryMap, MapOption}; | |
//use libc; | |
use std::f32; | |
use std::default::Default; | |
pub const n: usize = (16*1024); | |
const c_awg_smpl_freq: f32 = 125e6; | |
const AWG_BASE_ADDR: isize = 0x200000; | |
const AWG_CHA_OFFSET: usize = 0x10000; | |
const AWG_CHB_OFFSET: usize = 0x20000; | |
fn copyMem(chaMem: *mut u32) { //*mut [u32; n]) { | |
unsafe { | |
for i in 0..n { | |
*chaMem.offset(i as isize) = 0; | |
//(*chaMem)[i] = 0; | |
} | |
} | |
} | |
fn main() { | |
let size: usize = 0x400000; //0x400000; | |
let mut f = fs::OpenOptions::new().read(true) | |
.write(true) | |
.open("/dev/uio0") | |
.unwrap(); | |
let mmap_opts = &[ | |
// Then make the mapping *public* so it is written back to the file | |
MapOption::MapNonStandardFlags(libc::MAP_SHARED), | |
MapOption::MapReadable, | |
MapOption::MapWritable, | |
//MapOption::MapOffset(AWG_BASE_ADDR/10), | |
MapOption::MapFd(f.as_raw_fd()), | |
]; | |
let mmap = MemoryMap::new(size, mmap_opts).unwrap(); | |
let data = mmap.data(); | |
let awgReg: *mut fpga_awg::awg_reg; | |
let chaMem: *mut [u32; n]; | |
let chbMem: *mut [u32; n]; | |
unsafe { | |
awgReg = data.offset(AWG_BASE_ADDR) as *mut fpga_awg::awg_reg; | |
chaMem = data.offset(AWG_BASE_ADDR + AWG_CHA_OFFSET as isize) as *mut [u32; n]; | |
chbMem = data.offset(AWG_BASE_ADDR + AWG_CHB_OFFSET as isize) as *mut [u32; n]; | |
} | |
copyMem(chaMem as *mut u32); | |
} |
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