URL https://opencores.org/ocsvn/darkriscv/darkriscv/trunk

Subversion Repositories darkriscv

[/] [darkriscv/] [trunk/] [src/] [stdio.c] - Diff between revs 2 and 4

Show entire file | Details | Blame | View Log

Rev 2	Rev 4
Line 32...	Line 32...
`#include <stdio.h>`	`#include <stdio.h>`
`#include <stdarg.h>`	`#include <stdarg.h>`

`#ifdef __RISCV__`	`#ifdef __RISCV__`

	`// idle time, update timer and blink the led! :)`

	`void _idle(void)`
	`{`
	`if(io.irq&IRQ_TIMR)`
	`{`
	`if(!utimers--)`
	`{`
	`io.led++;`
	`utimers=999999;`
	`}`
	`io.irq = IRQ_TIMR;`
	`}`
	`}`

`// putchar and getchar uses the "low-level" io`	`// putchar and getchar uses the "low-level" io`

`int getchar(void)`	`int getchar(void)`
`{`	`{`
`while((io.uart.stat&2)==0); // uart empty, wait...`	`while((io.uart.stat&2)==0) _idle(); // uart empty, wait...`

`return io.uart.fifo;`	`return io.uart.fifo;`
`}`	`}`

`int putchar(int c)`	`int putchar(int c)`
`{`	`{`
`if(c=='\n')`	`if(c=='\n')`
`{`	`{`
`while(io.uart.stat&1); // uart busy, wait...`	`while(io.uart.stat&1) _idle(); // uart busy, wait...`
`io.uart.fifo = '\r';`	`io.uart.fifo = '\r';`
`}`	`}`

`while(io.uart.stat&1); // uart busy, wait...`	`while(io.uart.stat&1) _idle(); // uart busy, wait...`
`return io.uart.fifo = c;`	`return io.uart.fifo = c;`
`}`	`}`

`#endif`	`#endif`

`// high-level functions uses the getchar/putchar`	`// high-level functions use the getchar/putchar`

`char gets(char p,int s)`	`char gets(char p,int s)`
`{`	`{`
`char *ret = p;`	`char *ret = p;`
`int c;`	`int c;`
Line 304...	Line 318...
`{`	`{`
`unsigned acc,aux;`	`unsigned acc,aux;`

`if(!y) return 0;`	`if(!y) return 0;`

`for(aux=1,acc=y;acc<x;aux<<=1,acc<<=1,y=acc);`	`for(aux=1;y<x&&!(y&(1<<31));aux<<=1,y<<=1);`
`for(acc=0;x&&aux;aux>>=1,y>>=1) if(y<=x) x-=y,acc+=aux;`	`for(acc=0;x&&aux;aux>>=1,y>>=1) if(y<=x) x-=y,acc+=aux;`

`return opt ? acc : x;`	`return opt ? acc : x;`
`}`	`}`

Line 347...	Line 361...
`return __div_mod_si3(x,y,0);`	`return __div_mod_si3(x,y,0);`
`}`	`}`

`void usleep(int delay)`	`void usleep(int delay)`
`{`	`{`
`if(threads>1)`
`{`
`while(delay--)`
`{`
`int t0 = utimers;`

`while(t0==utimers);`
`}`
`}`
`else`
`{`	`{`
`while(delay--)`	`while(delay--)`
`{`	`{`
`for(io.irq=IRQ_TIMR;!io.irq;);`	`for(io.irq=IRQ_TIMR;!io.irq;);`
`}`	`}`

Browse

Tools

Subversion Repositories darkriscv

[/] [darkriscv/] [trunk/] [src/] [stdio.c] - Diff between revs 2 and 4