registers.c

lpc2138读写SD卡的fat文件系统

// Register initialization required to support the MCB2130 board and the wheather station
#include <LPC213x.H>            // LPC21xx definitions

// UART 1 Tx and Rx pin assignment, AD1 and DAC assignments
void init_registers() {
  // Pin Select register 0
  PINSEL0 = 0x00050020;     	// Enable RxD1 and TxD1	on pins P0.8 & P0.9
  								// Enable Cap 1.0 on pins P0.10 & Cap 1.1 on pin P0.11
								// the 20 is for pin 2 as timer 0 capture 0.0 
  // setup IO pin directions for outputs
  IODIR1  = 0x00FF0000;         // P1.16..23 defined as Outputs
  // Setup A/D
  //  AD0CR   = 0x00200402;     // Setup A/D: 10-bit AIN0 (ch 0 and 1) @ 3MHz
  PINSEL1 = 0x01400000;         // enable DAC was 0x01080000
  								// was changed to  0x01000000 to disable DAC
								// chanded to 0x01400000 enable A/D ch 0 & 1
  // enable interrupts			// currectly DAC is disabled, hence PINSEL1 = 0x01000000
  								// Default for GPIO P0.16..18 are used for position
  VICIntEnable = 0x000020B0;    // Enable Timer0 (0x00000010),
  								// Timer 1 (0x00000020), 
								// UART 1 (0x00000080), 
								// and RTC Interrupt (0x00002000)
}
//