Diff: u8g_com_io.c

Revision:

0:972874f31c98

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/u8g_com_io.c	Wed Mar 07 12:49:14 2018 +0000
@@ -0,0 +1,252 @@
+/*
+  
+  u8g_com_io.c
+  
+  abstraction layer for low level i/o 
+
+  Universal 8bit Graphics Library
+  
+  Copyright (c) 2012, olikraus@gmail.com
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification, 
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice, this list 
+    of conditions and the following disclaimer.
+    
+  * Redistributions in binary form must reproduce the above copyright notice, this 
+    list of conditions and the following disclaimer in the documentation and/or other 
+    materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
+  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
+  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+
+  Update for ATOMIC operation done (01 Jun 2013)
+    U8G_ATOMIC_OR(ptr, val)
+    U8G_ATOMIC_AND(ptr, val)
+    U8G_ATOMIC_START();
+    U8G_ATOMIC_END();
+
+  uint8_t u8g_Pin(uint8_t port, uint8_t bitpos)						Convert to internal number: AVR: port*8+bitpos, ARM: port*16+bitpos
+  void u8g_SetPinOutput(uint8_t internal_pin_number)
+  void u8g_SetPinInput(uint8_t internal_pin_number)
+  void u8g_SetPinLevel(uint8_t internal_pin_number, uint8_t level)
+  uint8_t u8g_GetPinLevel(uint8_t internal_pin_number)
+
+
+*/
+
+#include "u8g.h"
+
+#if defined(__AVR__)
+
+#include <avr/interrupt.h>
+#include <avr/io.h>
+
+typedef volatile uint8_t * IO_PTR;
+
+/* create internal pin number */
+uint8_t u8g_Pin(uint8_t port, uint8_t bitpos)
+{
+  port <<= 3;
+  port += bitpos;
+  return port;
+}
+
+const IO_PTR u8g_avr_ddr_P[] PROGMEM = {
+#ifdef DDRA
+  &DDRA,
+#else
+  0,
+#endif
+  &DDRB,
+#ifdef DDRC
+  &DDRC,
+#ifdef DDRD
+  &DDRD,
+#ifdef DDRE
+  &DDRE,
+#ifdef DDRF
+  &DDRF,
+#ifdef DDRG
+  &DDRG,
+#ifdef DDRH
+  &DDRH,
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+};
+
+
+const IO_PTR u8g_avr_port_P[] PROGMEM = {
+#ifdef PORTA
+  &PORTA,
+#else
+  0,
+#endif
+  &PORTB,
+#ifdef PORTC
+  &PORTC,
+#ifdef PORTD
+  &PORTD,
+#ifdef PORTE
+  &PORTE,
+#ifdef PORTF
+  &PORTF,
+#ifdef PORTG
+  &PORTG,
+#ifdef PORTH
+  &PORTH,
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+};
+
+const IO_PTR u8g_avr_pin_P[] PROGMEM = {
+#ifdef PINA
+  &PINA,
+#else
+  0,
+#endif
+  &PINB,
+#ifdef PINC
+  &PINC,
+#ifdef PIND
+  &PIND,
+#ifdef PINE
+  &PINE,
+#ifdef PINF
+  &PINF,
+#ifdef PING
+  &PING,
+#ifdef PINH
+  &PINH,
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+};
+
+static volatile uint8_t *u8g_get_avr_io_ptr(const IO_PTR *base, uint8_t offset)
+{
+  volatile uint8_t * tmp;
+  base += offset;
+  memcpy_P(&tmp, base, sizeof(volatile uint8_t * PROGMEM));
+  return tmp; 
+}
+
+/* set direction to output of the specified pin (internal pin number) */
+void u8g_SetPinOutput(uint8_t internal_pin_number)
+{
+  *u8g_get_avr_io_ptr(u8g_avr_ddr_P, internal_pin_number>>3) |= _BV(internal_pin_number&7);
+}
+
+void u8g_SetPinInput(uint8_t internal_pin_number)
+{
+  *u8g_get_avr_io_ptr(u8g_avr_ddr_P, internal_pin_number>>3) &= ~_BV(internal_pin_number&7);
+}
+
+void u8g_SetPinLevel(uint8_t internal_pin_number, uint8_t level)
+{
+  volatile uint8_t * tmp = u8g_get_avr_io_ptr(u8g_avr_port_P, internal_pin_number>>3);
+  
+  if ( level == 0 )
+  {
+    U8G_ATOMIC_AND(tmp, ~_BV(internal_pin_number&7));
+   // *tmp &= ~_BV(internal_pin_number&7);
+  }
+  else
+  {
+    U8G_ATOMIC_OR(tmp, _BV(internal_pin_number&7));
+    //*tmp |= _BV(internal_pin_number&7);
+  }
+  
+}
+
+uint8_t u8g_GetPinLevel(uint8_t internal_pin_number)
+{
+  volatile uint8_t * tmp = u8g_get_avr_io_ptr(u8g_avr_pin_P, internal_pin_number>>3);
+  if ( ((*tmp) & _BV(internal_pin_number&7))  != 0 )
+    return 1;
+  return 0;
+}
+
+#else
+
+/* convert "port" and "bitpos" to internal pin number */
+uint8_t u8g_Pin(uint8_t port, uint8_t bitpos)
+{
+  port <<= 3;
+  port += bitpos;
+  return port;
+}
+
+void u8g_SetPinOutput(uint8_t internal_pin_number)
+{
+}
+
+void u8g_SetPinInput(uint8_t internal_pin_number)
+{
+}
+
+void u8g_SetPinLevel(uint8_t internal_pin_number, uint8_t level)
+{
+}
+
+uint8_t u8g_GetPinLevel(uint8_t internal_pin_number)
+{
+  return 0;
+}
+
+#endif
+
+
+#if defined(U8G_WITH_PINLIST)
+
+void u8g_SetPIOutput(u8g_t *u8g, uint8_t pi)
+{
+  uint8_t pin;
+  pin = u8g->pin_list[pi];
+  if ( pin != U8G_PIN_NONE )
+    u8g_SetPinOutput(pin);
+}
+
+void u8g_SetPILevel(u8g_t *u8g, uint8_t pi, uint8_t level)
+{
+  uint8_t pin;
+  pin = u8g->pin_list[pi];
+  if ( pin != U8G_PIN_NONE )
+    u8g_SetPinLevel(pin, level);
+}
+
+#else  /* defined(U8G_WITH_PINLIST) */
+void u8g_SetPIOutput(u8g_t *u8g, uint8_t pi)
+{
+}
+
+void u8g_SetPILevel(u8g_t *u8g, uint8_t pi, uint8_t level)
+{
+}
+
+#endif /* defined(U8G_WITH_PINLIST) */
+