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/**
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/**
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@file soc.c
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@file soc.c
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@brief Supporting functions that do not warrant their own file.
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@brief Supporting functions that do not warrant their own file.
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@bug Any attempt to use gets() or puts() triggers a linker error (undefined
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reference to '_impure_ptr') in this file, despite the fact that this
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file does not reference those symbols; newlib's gets and puts DO, and
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the linker is somehow getting confused.
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Right now I have no idea how to sort that out.
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*/
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*/
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#include <stdint.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "soc.h"
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#include "soc.h"
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/* Linker-defined symbols usd to access the data section */
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/* Prototypes for external functions */
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extern char data_start []; /**< Where .data section should be in RAM */
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extern void putchar(int c);
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extern char data_load_start []; /**< Where .data section is in ROM */
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extern int getchar(void);
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extern char data_size []; /**< Size of .data section */
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/*-- Non-standard utility functions ------------------------------------------*/
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/*-- Non-standard utility functions ------------------------------------------*/
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/** Return time elapsed since the last HW reset in clock cycles */
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/** Return time elapsed since the last HW reset in clock cycles */
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cycles = *((volatile unsigned *)0x20000100);
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cycles = *((volatile unsigned *)0x20000100);
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return cycles;
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return cycles;
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}
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}
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/** Copies .data sections (initialized data) from ROM to RAM.
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Will be called from the startup code IIF the program was linked to run
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from FLASH. */
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void copy_data_sections(void){
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uint32_t i;
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/* Move data section image from flash to RAM */
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if (data_start != data_load_start){
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for(i=0;i<(uint32_t)data_size;i++){
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data_start[i] = data_load_start[i];
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}
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}
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}
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/*-- Libc replacement functions ----------------------------------------------*/
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/*-- Libc replacement functions ----------------------------------------------*/
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/** Write character to console; replacement for standard puts.
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/** Write string to console; replacement for standard puts.
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Uses no buffering. */
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Uses no buffering. */
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int puts(const char *string){
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int puts(const char *string){
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while(*string){
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while(*string){
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/* Implicit CR with every NL if requested */
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/* Implicit CR with every NL if requested */
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if(IMPLICIT_CR_WITH_NL & (*string == '\n')){
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if(IMPLICIT_CR_WITH_NL & (*string == '\n')){
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putchar('\n');
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putchar('\n');
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return 0; /* on success return anything non-negative */
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return 0; /* on success return anything non-negative */
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}
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}
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/** Read character from console, blocking; replacement for standard puts.
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/** Read string from console, blocking; replacement for standard puts.
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Uses no buffering. */
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Uses no buffering. */
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char *gets (char *str){
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char *gets (char *str){
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uint32_t i=0;
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uint32_t i=0;
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char c;
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char c;
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