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Fix issue #52. Add esp/uart.h

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This commit is contained in:
Alex Stewart 2015-10-05 21:51:57 -07:00
parent afd58bc1ff
commit 707d0ed981
2 changed files with 126 additions and 14 deletions
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27
core/newlib_syscalls.c
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@ -9,6 +9,7 @@
#include <sys/errno.h>
#include <espressif/sdk_private.h>
#include <common_macros.h>
#include <esp/uart.h>
#include <stdlib.h>
IRAM caddr_t _sbrk_r (struct _reent *r, int incr)
@ -32,37 +33,35 @@ IRAM caddr_t _sbrk_r (struct _reent *r, int incr)
return (caddr_t) prev_heap_end;
}
/* syscall implementation for stdio write to UART
at the moment UART functionality is all still in the binary SDK
*/
/* syscall implementation for stdio write to UART */
long _write_r(struct _reent *r, int fd, const char *ptr, int len )
{
if(fd != r->_stdout->_file) {
r->_errno = EBADF;
return -1;
}
for(int i = 0; i < len; i++)
sdk_os_putc(ptr[i]);
for(int i = 0; i < len; i++) {
uart_putc(0, ptr[i]);
}
return len;
}
/* syscall implementation for stdio read from UART
at the moment UART functionality is all still in the binary SDK
*/
/* syscall implementation for stdio read from UART */
long _read_r( struct _reent *r, int fd, char *ptr, int len )
{
int ch, i;
if(fd != r->_stdin->_file) {
r->_errno = EBADF;
return -1;
}
for(int i = 0; i < len; i++) {
char ch;
while (sdk_uart_rx_one_char(&ch)) ;
uart_rxfifo_wait(0, 1);
for(i = 0; i < len; i++) {
ch = uart_getc_nowait(0);
if (ch < 0) break;
ptr[i] = ch;
}
return len;
return i;
}
/* Stub syscall implementations follow, to allow compiling newlib functions that