Kontron KTAM3874-pITX - Manual (Page 60)

KTD-S0057-I Page 56 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/mman.h>
/****** Do not forget to enable TIMER4 to TIMER7 in U-Boot Setup ******/
#define TIMER4_BASE_ADDR
0x48044000
#define TIMER5_BASE_ADDR 0x48046000
#define TIMER6_BASE_ADDR 0x48048000
#define TIMER7_BASE_ADDR 0x4804A000
#define TIMER_BASE TIMER4_BASE_ADDR
/* Register definitions */
#define TIOCP_CFG
0x10
#define TCLR 0x38
#define TCRR 0x3C
#define TLDR 0x40
#define TTGR 0x44
#define TMAR 0x4C
#define TSICR 0x54
/* Register bits */
#define TIOCP_SOFTRES
0x01
#define TIOCP_SMARTIDLE 0x08
#define TCLR_ST 0x01
#define TCLR_AR 0x02
#define TCLR_CE 0x40
#define TCLR_SCPWM 0x80
#define TCLR_TRGOVFLMAT 0x800
#define TCLR_TRG 0xC00
#define TCLR_PT 0x1000
#define TCLR_GPOCFG
0x4000
#define TSICR_SFT 0x02
#define TSICR_POSTED 0x04
#define RESET_TIMEOUT 100000
#define STOP_TIMEOUT 2000000
/* Frequency related definitions */
#define FREQ_VAL
1024 /* VAL = 128 approx. 155 kHz - VAL = 1024 approx. 20 kHz */
#define RELOAD_VAL 0xFFFFFFFF - FREQ_VAL
#define DUTY_MAX 255
#define MAP_SIZE 4096UL
#define MAP_MASK (MAP_SIZE - 1)
static int fd;
static void *virt_addr;
static void *map_base;