// Built with BFTC Rev. 1.0.0, lun 25 agosto 2014 15:58:19

/*

    Copyright 2014 Digital Technology Art SRL

    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/>.

*/

// Show how to implement an 8 channel fast counter on port PG[7:0].

// The counter is capable to count with a frequency higher then 500KHz

// In another way it show the interrupt efficency

//

#include "main.h"

unsigned counter[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

unsigned mask[8] = { 1, 2, 4, 8, 16, 32, 64, 128 };

// Interrupt service procedure

//

void PGCallback()

{

int i;

for(i = 0; i < 8; i++)

if(*pPORTGIO & mask[i])

{

counter[i]++;

// Clear the interrupt request

*pPORTGIO_CLEAR = mask[i];

}

}

unsigned char Menu()

{

printf("\n");

printf("COMMANDS ******************\n");

printf("0 - Clear counts\n");

printf("D - Display counts\n");

printf("> ");

return GetChar_Uart0();

}

int main(void)

{

int com, i;

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 | PG1 | PG2 | PG3 | PG4 | PG5 | PG6 | PG7, PGCallback);

Set_PortGInterruptEnable(PG0 | PG1 | PG2 | PG3 | PG4 | PG5 | PG6 | PG7, true);

while(1) // Main loop

{

com = Menu();

switch(com)

{

case '0': for(i = 0; i < 8; i++)

counter[i] = 0;

break;

case 'D': for(i = 0; i < 8; i++)

printf("%8u ", counter[i]);

printf("\n");

break;

}

}

return 0;

}