1/* 2 * Copyright 2017, Data61 3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO) 4 * ABN 41 687 119 230. 5 * 6 * This software may be distributed and modified according to the terms of 7 * the BSD 2-Clause license. Note that NO WARRANTY is provided. 8 * See "LICENSE_BSD2.txt" for details. 9 * 10 * @TAG(DATA61_BSD) 11 */ 12 13#include <string.h> 14#include <stdlib.h> 15#include <platsupport/serial.h> 16#include "chardev.h" 17 18ssize_t uart_write( 19 ps_chardevice_t *d, 20 const void *vdata, 21 size_t count, 22 chardev_callback_t rcb UNUSED, 23 void *token UNUSED) 24{ 25 const unsigned char *data = (const unsigned char *)vdata; 26 for (int i = 0; i < count; i++) { 27 if (uart_putchar(d, data[i]) < 0) { 28 return i; 29 } 30 } 31 return count; 32} 33 34ssize_t uart_read( 35 ps_chardevice_t *d, 36 void *vdata, 37 size_t count, 38 chardev_callback_t rcb UNUSED, 39 void *token UNUSED) 40{ 41 char *data = (char *)vdata; 42 for (int i = 0; i < count; i++) { 43 int ret = uart_getchar(d); 44 if (EOF == ret) { 45 return i; 46 } 47 data[i] = ret; 48 } 49 return count; 50} 51