// Built with BFTC Rev. 1.0.0, lun 25 agosto 2014 17:00:44

This file is part of Blackfin Toolchain (BFTC) project.

BFTC is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

BFTC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with Nome-Programma. If not, see <http://www.gnu.org/licenses/>.

// Test of reflexes speed

// Connect on PG0 a switch in this mode:

// 10K Resistor

// Y14.1 ---+----[====]---+

// | |

// [-( BUTTON |

// | |

// Y12.4 ---+ +--- Y12.6

// Run the program and when the string START is displayed press the button

// at your maximum speed.

// Repeat the test for an average value.

#include "main.h"

#define ST st = Get_TimerCounter(TIMER_0)

#define ET et = Get_TimerCounter(TIMER_0)

#define TIMEBASE 0xFFFFFFFF

unsigned int st, et;

void display()

{

double tx;

if(st > et) tx = TIMEBASE - st + et;

else tx = et - st;

printf("Elapsed time: %10.3f ms\n", tx / 100000.0);

}

// Interrupt service procedure

void PortCallback()

{

ET;

display();

// Clear the interrupt request

*pPORTGIO_CLEAR = PG0;

}

unsigned randx(unsigned val)

{

return Get_TimerCounter(TIMER_0) * 0x1961957 + val;

}

int main(void)

{

Set_PLL(16, 4); // CORE: 25MHz * 16 = 400MHz, SCLK: 400MHz / 4 = 100MHz

Set_Port(); // Set the port according to project set

Set_Uart0(115200); // printf is redirected to UART0

// Set an interrupt on the rising edge of the PG0 port

Set_PortGInterruptService(PG0, PortCallback);

Set_PortGInterruptEnable(PG0, true);

Set_TimerCounter(TIMER_0);

Set_TimerEnable(TIMER_0, true);

while(1) // Main loop

{

printf("START!\n");

ST;

DelayUs(500000 + randx(et) % 1000000);

}

return 0;

}