git: update to v1.0HEADv1.0master

1 files changed, 161 insertions, 0 deletions

diff --git a/uart.c b/uart.c
new file mode 100644
index 0000000..f758cfb
--- /dev/null
+++ b/uart.c
@@ -0,0 +1,161 @@
+/************************************************************************/
+/*                                                                      */
+/*  File:           uart.c                                              */
+/*  Description:    simple wrapper to serial line device(s).            */
+/*  Version:        1.0                                                 */
+/*  Author:         Otto Mattik                                         */
+/*                                                                      */
+/*  (C)Copyright Otto Mattik 2014-2021.                                 */
+/*                                                                      */
+/*  This file is a part of 'armen' (a tiny operating system).           */
+/*  'armen' is distributed under the CeCILL-V2.1 licence. For more      */
+/*  details about this licence, please visit the website cecill.info    */
+/*                                                                      */
+/************************************************************************/
+
+#ifndef F_CPU
+  #error "cpu clock frequency is not defined"
+#endif
+
+#include <stdint.h>
+#include <stdarg.h>
+#include "core.h"
+
+#ifdef __AVR_ARCH__
+  #include "avr/uart.h"
+#endif
+
+#if defined(UART) && (UART > 0) && (ARMEN_UART_MAX != 0)
+
+  #if (UART > ARMEN_UART_MAX)
+    #undef UART
+    #define UART ARMEN_UART_MAX
+  #endif
+  #define ARMEN_UARTS   UART
+
+  #ifndef UART_RX_BUFFER_SIZE
+    #define UART_RX_BUFFER_SIZE 4
+  #endif
+
+  static struct {
+    int8_t (*open)(uint8_t,uint8_t);
+    int8_t (*close)(uint8_t);
+    int8_t (*read)(uint8_t,uint8_t*);
+    int8_t (*write)(uint8_t,uint8_t);
+  #ifdef UART_IOCTL
+    int8_t (*ioctl)(uint8_t,uint8_t,va_list);
+  #endif
+  } devices[ARMEN_UARTS];
+
+  #ifdef __AVR_ARCH__
+    #define AVR_UART_C
+    #include "avr/uart.c"
+  #endif
+
+  int8_t uart_open( uint8_t device, uint8_t config )
+  {
+  #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+  #endif
+    return( devices[device].open( device, config ) );
+  }
+
+  int8_t uart_close( uint8_t device )
+  {
+  #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+  #endif
+    return( devices[device].close( device ) );
+  }
+
+  int8_t uart_read( uint8_t device, uint8_t* byte )
+  {
+  #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+  #endif
+    return( devices[device].read( device, byte ) );
+  }
+
+  int8_t uart_write( uint8_t device, uint8_t byte )
+  {
+  #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+  #endif
+    return( devices[device].write( device, byte ) );
+  }
+
+  #ifdef UART_IOCTL
+  int8_t uart_ioctl( uint8_t device, uint8_t request, ... )
+  {
+    int ret;
+    va_list args;
+
+    #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+    #endif
+    va_start( args, request );
+    ret = devices[device].ioctl( device, request, args );
+    va_end( args );
+    return( ret );
+  }
+  #endif
+
+  char uart_getchar( uint8_t device )
+  {
+    char c;
+
+    #ifdef CHECK_PARAM
+    if( device >= ARMEN_UARTS )
+        return( -1 );
+    #endif
+
+    if( devices[device].read( device, &c ) < 0 )
+        c = -1;
+    return( (char)c );
+  }
+
+  void uart_putchar( uint8_t device, char c )
+  {
+    #ifdef CHECK_PARAM
+    if( device < ARMEN_UARTS )
+    #endif
+    devices[device].write( device, c );
+  }
+
+  void uart_putstr( uint8_t device, char* s )
+  {
+    #ifdef CHECK_PARAM
+    if( device < ARMEN_UARTS )
+    #endif
+    while( *s != 0 )
+        devices[device].write( device, *s++ );
+  }
+
+  #ifdef ARDUINO
+  #include <stddef.h>
+
+  extern int vsnprintf(char *__s, size_t __n, const char *__fmt, va_list ap);
+
+  void uart_printf( uint8_t device, char* fmt, ... )
+  {
+    va_list args;
+    static char buffer[80];
+
+    #ifdef CHECK_PARAM
+    if( device < ARMEN_UARTS )
+    #endif
+    {
+        va_start( args, fmt );
+        vsnprintf( buffer, sizeof( buffer ), fmt, args );
+        va_end( args );
+        uart_putstr( device, buffer );
+    }
+  }
+  #endif
+
+#endif