Tedd OKANO / Mbed 2 deprecated port_speed_test_for_beta_env

port speed test in beta env

main.cpp@2:7372f9e25216, 2012-07-10 (annotated)

Committer:
okano
Date:
Tue Jul 10 02:10:08 2012 +0000
Revision:
2:7372f9e25216
Parent:
0:9ed7b15638cd 
port speed test in beta env. mbed-rev40 (latest in beta env)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okano 0:9ed7b15638cd 1 // port speed test program
okano 0:9ed7b15638cd 2 // this code is based on ..
okano 0:9ed7b15638cd 3 // http://mbed.org/users/simon/notebook/busout-portout-digitalout-speedup/
okano 0:9ed7b15638cd 4
okano 0:9ed7b15638cd 5 #include "mbed.h"
okano 0:9ed7b15638cd 6
okano 0:9ed7b15638cd 7 BusOut bus(P1_24, P1_25, P1_26, P1_27, P1_28, P1_29, P1_30, P1_31);
okano 0:9ed7b15638cd 8 PortOut port(Port0, 0x00000FF0);
okano 0:9ed7b15638cd 9 DigitalOut out(LED1);
okano 0:9ed7b15638cd 10
okano 0:9ed7b15638cd 11 Timer t;
okano 0:9ed7b15638cd 12
okano 0:9ed7b15638cd 13 int main() {
okano 0:9ed7b15638cd 14 // printf(" ** port speed test **\r\n");
okano 0:9ed7b15638cd 15
okano 0:9ed7b15638cd 16 t.start();
okano 0:9ed7b15638cd 17 for(int i=0; i<1000000; i++) {
okano 0:9ed7b15638cd 18 bus = 0;
okano 0:9ed7b15638cd 19 bus = 0xFF;
okano 0:9ed7b15638cd 20 }
okano 0:9ed7b15638cd 21 printf(" BusOut = %8d kHz\r\n",(int)( 1000.0 / t));
okano 0:9ed7b15638cd 22
okano 0:9ed7b15638cd 23 t.reset();
okano 0:9ed7b15638cd 24 for(int i=0; i<1000000; i++) {
okano 0:9ed7b15638cd 25 port = 0;
okano 0:9ed7b15638cd 26 port = 0xFF000000;
okano 0:9ed7b15638cd 27 }
okano 0:9ed7b15638cd 28 printf(" PortOut = %8d kHz\r\n", (int)(1000.0 / t));
okano 0:9ed7b15638cd 29
okano 0:9ed7b15638cd 30 t.reset();
okano 0:9ed7b15638cd 31 for(int i=0; i<1000000; i++) {
okano 0:9ed7b15638cd 32 out = 0;
okano 0:9ed7b15638cd 33 out = 1;
okano 0:9ed7b15638cd 34 }
okano 0:9ed7b15638cd 35 printf(" DigitalOut = %8d kHz\r\n", (int)(1000.0 / t));
okano 0:9ed7b15638cd 36 }
okano 0:9ed7b15638cd 37