Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_NXP/TARGET_LPC11XX_11CXX/TOOLCHAIN_GCC_CS/sys.cpp@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 2 #include <sys/types.h>
<> 144:ef7eb2e8f9f7 3 #include <errno.h>
<> 144:ef7eb2e8f9f7 4
<> 144:ef7eb2e8f9f7 5 extern "C" {
<> 144:ef7eb2e8f9f7 6
<> 144:ef7eb2e8f9f7 7 struct SCS3Regions {
<> 144:ef7eb2e8f9f7 8 unsigned long Dummy;
<> 144:ef7eb2e8f9f7 9 unsigned long* InitRam;
<> 144:ef7eb2e8f9f7 10 unsigned long* StartRam;
<> 144:ef7eb2e8f9f7 11 unsigned long InitSizeRam;
<> 144:ef7eb2e8f9f7 12 unsigned long ZeroSizeRam;
<> 144:ef7eb2e8f9f7 13 };
<> 144:ef7eb2e8f9f7 14
<> 144:ef7eb2e8f9f7 15 extern unsigned long __cs3_regions;
<> 144:ef7eb2e8f9f7 16 extern unsigned long __cs3_heap_start;
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 int main(void);
<> 144:ef7eb2e8f9f7 19 void __libc_init_array(void);
<> 144:ef7eb2e8f9f7 20 void exit(int ErrorCode);
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 static void *heap_pointer = NULL;
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 void __cs3_start_c(void) {
<> 144:ef7eb2e8f9f7 25 static SCS3Regions* pCS3Regions = (SCS3Regions*)&__cs3_regions;
<> 144:ef7eb2e8f9f7 26 unsigned long* pulDest;
<> 144:ef7eb2e8f9f7 27 unsigned long* pulSrc;
<> 144:ef7eb2e8f9f7 28 unsigned long ByteCount;
<> 144:ef7eb2e8f9f7 29 unsigned long i;
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 pulSrc = pCS3Regions->InitRam;
<> 144:ef7eb2e8f9f7 32 pulDest = pCS3Regions->StartRam;
<> 144:ef7eb2e8f9f7 33 ByteCount = pCS3Regions->InitSizeRam;
<> 144:ef7eb2e8f9f7 34 if (pulSrc != pulDest) {
<> 144:ef7eb2e8f9f7 35 for(i = 0 ; i < ByteCount ; i += sizeof(unsigned long)) {
<> 144:ef7eb2e8f9f7 36 *(pulDest++) = *(pulSrc++);
<> 144:ef7eb2e8f9f7 37 }
<> 144:ef7eb2e8f9f7 38 } else {
<> 144:ef7eb2e8f9f7 39 pulDest = (unsigned long*)(void*)((char*)pulDest + ByteCount);
<> 144:ef7eb2e8f9f7 40 }
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 ByteCount = pCS3Regions->ZeroSizeRam;
<> 144:ef7eb2e8f9f7 43 for(i = 0 ; i < ByteCount ; i += sizeof(unsigned long)) {
<> 144:ef7eb2e8f9f7 44 *(pulDest++) = 0;
<> 144:ef7eb2e8f9f7 45 }
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 heap_pointer = &__cs3_heap_start;
<> 144:ef7eb2e8f9f7 48 __libc_init_array();
<> 144:ef7eb2e8f9f7 49 exit(main());
<> 144:ef7eb2e8f9f7 50 }
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 int _kill(int pid, int sig) {
<> 144:ef7eb2e8f9f7 53 errno = EINVAL;
<> 144:ef7eb2e8f9f7 54 return -1;
<> 144:ef7eb2e8f9f7 55 }
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 void _exit(int status) {
<> 144:ef7eb2e8f9f7 58 exit(status);
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 int _getpid(void) {
<> 144:ef7eb2e8f9f7 62 return 1;
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 void *_sbrk(unsigned int incr) {
<> 144:ef7eb2e8f9f7 66 void *mem;
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 unsigned int next = ((((unsigned int)heap_pointer + incr) + 7) & ~7);
<> 144:ef7eb2e8f9f7 69 if (next > __get_MSP()) {
<> 144:ef7eb2e8f9f7 70 mem = NULL;
<> 144:ef7eb2e8f9f7 71 } else {
<> 144:ef7eb2e8f9f7 72 mem = (void *)heap_pointer;
<> 144:ef7eb2e8f9f7 73 }
<> 144:ef7eb2e8f9f7 74 heap_pointer = (void *)next;
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 return mem;
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 }