pub fn write_data(&mut self, ch: u32, data: *mut [i32; n], awg: *mut awgParam) {
		let i: u32;
 
		unsafe {
			if(ch == 0) {
				/* Channel A */
				(*self.awgReg).state_machine_conf = 0x000041;
				(*self.awgReg).cha_scale_off = (*awg).offsgain as u32;
				(*self.awgReg).cha_count_wrap = (*awg).wrap;
				(*self.awgReg).cha_count_step = (*awg).step;
				(*self.awgReg).cha_start_off = 0;
 
				for i in 0..n {
					(*self.chaMem)[i] = (*data)[i] as u32;
				}
			} else if (ch == 1) {
				/* Channel B */
				(*self.awgReg).state_machine_conf = 0x410000;
				(*self.awgReg).chb_scale_off = (*awg).offsgain as u32;
				(*self.awgReg).chb_count_wrap = (*awg).wrap;
				(*self.awgReg).chb_count_step = (*awg).step;
				(*self.awgReg).chb_start_off = 0;
 
				for i in 0..n {
					(*self.chbMem)[i] = (*data)[i] as u32;
				}
			} else {
				panic!("wrong channel selected");
			}
 
			/* Enable both channels */
			(*self.awgReg).state_machine_conf = 0x110011;
		}
	}

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