fiq.rar_fiq_lpc2148

// // $Id: fiq.c 355 2009-01-12 04:10:58Z jcw $ // $Revision: 355 $ // $Author: jcw $ // $Date: 2009-01-11 23:10:58 -0500 (Sun, 11 Jan 2009) $ // $HeadURL: http://tinymicros.com/svn_public/arm/lpc2148_demo/trunk/fiq/fiq.c $ // #include <stdlib.h> #include <string.h> #include "FreeRTOS.h" #include "../cpu/cpu.h" #include "fiqISR.h" #include "fiq.h" // // // extern volatile unsigned int fiqCounter; // // // void fiqInit (void) { SCB_PCONP |= SCB_PCONP_PCTIM1; VIC_IntSelect |= VIC_IntSelect_Timer1; VIC_IntEnable = VIC_IntEnable_Timer1; T1_PR = 0; T1_MR0 = configCPU_CLOCK_HZ / 8; T1_MCR = T_MCR_MR0R | T_MCR_MR0I; } int fiqEnable (void) { unsigned int state = T1_TCR; // // Only needed in case someone used the 'beep' command, which also use timer 1. // fiqInit (); T1_TCR = T_TCR_CE; return (state & T_TCR_CE) ? 1 : 0; } int fiqDisable (void) { unsigned int state = T1_TCR; T1_TCR = T_TCR_CR; return (state & T_TCR_CE) ? 1 : 0; } unsigned int fiqGetCount (void) { return fiqCounter; } void fiqClearCount (void) { fiqCounter = 0; } unsigned char *fiqFIQISRCopyToRAM (void) { static unsigned char *FIQInterrupt = NULL; if (!FIQInterrupt) { if ((FIQInterrupt = malloc (fiqISRLength ()))) { memcpy (FIQInterrupt, &fiqISR, fiqISRLength ()); cpuSetupFIQISR (FIQInterrupt); } } return FIQInterrupt; } #if 0 // // If you prefer a version that keeps the interrupt vectors in a static // variable instead of malloc(), enable this version, and disable the one // above. // unsigned char *fiqFIQISRCopyToRAM (void) { static unsigned int FIQInterrupt [16]; if (sizeof (FIQInterrupt) >= fiqISRLength ()) { memcpy (FIQInterrupt, &fiqISR, fiqISRLength ()); cpuSetupFIQISR (FIQInterrupt); } return (unsigned char *) &FIQInterrupt [0]; } #endif