1 /************************************************************************ 2 * @brief Checks for the board revision and returns a value < 0 if wrong 3 * revision is specified in main.c 4 * 5 * @param none 6 * 7 * @return Whether or not the board revision matches the software 8 * - 0 - The board revision does not match the software 9 * - 1 - The board revision matches the software 10 *************************************************************************/ 11 unsigned char assert_board_version( void ) 12 { 13 P8DIR &= ~BIT7; // Set P8.7 input 14 P8OUT |= BIT7; // Set pullup resistor 15 P8REN |= BIT7; // Enable pull up resistors 16 17 #ifdef REV_02 18 if(!(P8IN & BIT7)) // Board rev = 0_02? 19 return 0; 20 #else 21 if((P8IN & BIT7)) // Board rev = 0_03? 22 return 0; 23 #endif 24 25 P8DIR |= BIT7; // Set P8.7 output 26 P8OUT &= ~BIT7; // Set P8.7 = 0 27 P8REN &= ~BIT7; // Disable pull up resistors 28 29 return 1; 30 } 31