ms_reset.m

来自「MatLab图像传感器网络仿真平台WiSNAP」· M 代码 · 共 56 行

function status = ms_reset(port);
%Mouse sensor reset.
%   STATUS = MS_RESET(PORT);
%
%   Input Parameters:
%   ================
%
%      port --------------> Parallel port base address decimal (positive integer).
%
%   Output Parameters:
%   =================
%
%      status ------------> Success status (-1 = error, +1 = success).
%
%   See also MS_FRAME, MS_POWER.

% Stephan Hengstler
% Stanford Wireless Sensor Networks Lab
% January 07, 2005
%
% Last modified: 01-21-2005
% .MEX C Source: ms_reset.c

%********************************** Mouse Sensor Reset ************************************

% define port addresses
DATA_PORT   = port;
STAT_PORT   = DATA_PORT + 1;
CTRL_PORT   = DATA_PORT + 2;

% define signal bit masks
MASK_NCS    = 2;
MASK_NPD    = 3;
MASK_MOSI   = 1;
MASK_MISO   = 8;
MASK_RESET  = 4;
MASK_SCLK   = 1;

% set direction out
ctrl_value  = inp32(CTRL_PORT);
ctrl_value  = bitset(ctrl_value,6,0);

% raise reset
ctrl_value  = bitset(ctrl_value,MASK_RESET,0);
out32(CTRL_PORT,ctrl_value)

% insert delay per data sheet
pause(10e-6)

% clear reset
ctrl_value  = bitset(ctrl_value,MASK_RESET,1);
out32(CTRL_PORT,ctrl_value)

% return status
status         = 1;