From 89ee198a04df6e0fee2f7bbad39a99798f9d7afa Mon Sep 17 00:00:00 2001
From: Roland Sahlsten <Roland.Sahlsten.ASE10@fh-joanneum.at>
Date: Tue, 24 May 2011 21:02:43 +0000
Subject: First version of MainProcessingUnit mpu.

git-svn-id: https://svn.spreadspace.org/mur.sat@27 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 software/mpu/src/gpio/gpio.c | 378 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 378 insertions(+)
 create mode 100644 software/mpu/src/gpio/gpio.c

(limited to 'software/mpu/src/gpio/gpio.c')

diff --git a/software/mpu/src/gpio/gpio.c b/software/mpu/src/gpio/gpio.c
new file mode 100644
index 0000000..84eee75
--- /dev/null
+++ b/software/mpu/src/gpio/gpio.c
@@ -0,0 +1,378 @@
+/*****************************************************************************
+ *   gpio.c:  GPIO C file for NXP LPC13xx Family Microprocessors
+ *
+ *   Copyright(C) 2008, NXP Semiconductor
+ *   All rights reserved.
+ *
+ *   History
+ *   2008.07.20  ver 1.00    Preliminary version, first Release
+ *   2009.12.09  ver 1.05    Mod to use mask registers for GPIO writes + inlining (.h)
+ *
+*****************************************************************************/
+#include "LPC13xx.h"			/* LPC13xx Peripheral Registers */
+#include "gpio.h"
+
+/* ===================
+ * CodeRed - Modified file to extract out interrupt handler related code,
+ * which is really application project specific.
+ * Set TIMER16_GENERIC_INTS to 1 to reenable original code.
+ * =================== */
+//#define GPIO_GENERIC_INTS 1
+
+#ifdef GPIO_GENERIC_INTS
+volatile uint32_t gpio0_counter = 0;
+volatile uint32_t gpio1_counter = 0;
+volatile uint32_t gpio2_counter = 0;
+volatile uint32_t gpio3_counter = 0;
+volatile uint32_t p0_1_counter  = 0;
+volatile uint32_t p1_1_counter  = 0;
+volatile uint32_t p2_1_counter  = 0;
+volatile uint32_t p3_1_counter  = 0;
+
+/*****************************************************************************
+** Function name:		PIOINT0_IRQHandler
+**
+** Descriptions:		Use one GPIO pin(port0 pin1) as interrupt source
+**
+** parameters:			None
+** Returned value:		None
+** 
+*****************************************************************************/
+void PIOINT0_IRQHandler(void)
+{
+  uint32_t regVal;
+
+  gpio0_counter++;
+  regVal = GPIOIntStatus( PORT0, 1 );
+  if ( regVal )
+  {
+	p0_1_counter++;
+	GPIOIntClear( PORT0, 1 );
+  }		
+  return;
+}
+
+/*****************************************************************************
+** Function name:		PIOINT1_IRQHandler
+**
+** Descriptions:		Use one GPIO pin(port1 pin1) as interrupt source
+**
+** parameters:			None
+** Returned value:		None
+** 
+*****************************************************************************/
+void PIOINT1_IRQHandler(void)
+{
+  uint32_t regVal;
+
+  gpio1_counter++;
+  regVal = GPIOIntStatus( PORT1, 1 );
+  if ( regVal )
+  {
+	p1_1_counter++;
+	GPIOIntClear( PORT1, 1 );
+  }		
+  return;
+}
+
+/*****************************************************************************
+** Function name:		PIOINT2_IRQHandler
+**
+** Descriptions:		Use one GPIO pin(port2 pin1) as interrupt source
+**
+** parameters:			None
+** Returned value:		None
+** 
+*****************************************************************************/
+void PIOINT2_IRQHandler(void)
+{
+  uint32_t regVal;
+
+  gpio2_counter++;
+  regVal = GPIOIntStatus( PORT2, 1 );
+  if ( regVal )
+  {
+	p2_1_counter++;
+	GPIOIntClear( PORT2, 1 );
+  }		
+  return;
+}
+
+/*****************************************************************************
+** Function name:		PIOINT3_IRQHandler
+**
+** Descriptions:		Use one GPIO pin(port3 pin1) as interrupt source
+**
+** parameters:			None
+** Returned value:		None
+** 
+*****************************************************************************/
+void PIOINT3_IRQHandler(void)
+{
+  uint32_t regVal;
+
+  gpio3_counter++;
+  regVal = GPIOIntStatus( PORT3, 1 );
+  if ( regVal )
+  {
+	p3_1_counter++;
+	GPIOIntClear( PORT3, 1 );
+  }		
+  return;
+}
+#endif //GPIO_GENERIC_INTS
+
+/*****************************************************************************
+** Function name:		GPIOInit
+**
+** Descriptions:		Initialize GPIO, install the
+**						GPIO interrupt handler
+**
+** parameters:			None
+** Returned value:		true or false, return false if the VIC table
+**						is full and GPIO interrupt handler can be
+**						installed.
+** 
+*****************************************************************************/
+void GPIOInit( void )
+{
+  /* Enable AHB clock to the GPIO domain. */
+  LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
+
+#ifdef __JTAG_DISABLED  
+  LPC_IOCON->JTAG_TDO_PIO1_1  &= ~0x07;
+  LPC_IOCON->JTAG_TDO_PIO1_1  |= 0x01;
+#endif
+
+  /* Set up NVIC when I/O pins are configured as external interrupts. */
+  NVIC_EnableIRQ(EINT0_IRQn);
+  NVIC_EnableIRQ(EINT1_IRQn);
+  NVIC_EnableIRQ(EINT2_IRQn);
+  NVIC_EnableIRQ(EINT3_IRQn);
+  return;
+}
+
+/*****************************************************************************
+** Function name:		GPIOSetInterrupt
+**
+** Descriptions:		Set interrupt sense, event, etc.
+**						edge or level, 0 is edge, 1 is level
+**						single or double edge, 0 is single, 1 is double 
+**						active high or low, etc.
+**
+** parameters:			port num, bit position, sense, single/doube, polarity
+** Returned value:		None
+** 
+*****************************************************************************/
+void GPIOSetInterrupt( uint32_t portNum, uint32_t bitPosi, uint32_t sense,
+			uint32_t single, uint32_t event )
+{
+  switch ( portNum )
+  {
+	case PORT0:
+	  if ( sense == 0 )
+	  {
+		LPC_GPIO0->IS &= ~(0x1<<bitPosi);
+		/* single or double only applies when sense is 0(edge trigger). */
+		if ( single == 0 )
+		  LPC_GPIO0->IBE &= ~(0x1<<bitPosi);
+		else
+		  LPC_GPIO0->IBE |= (0x1<<bitPosi);
+	  }
+	  else
+	  	LPC_GPIO0->IS |= (0x1<<bitPosi);
+	  if ( event == 0 )
+		LPC_GPIO0->IEV &= ~(0x1<<bitPosi);
+	  else
+		LPC_GPIO0->IEV |= (0x1<<bitPosi);
+	break;
+ 	case PORT1:
+	  if ( sense == 0 )
+	  {
+		LPC_GPIO1->IS &= ~(0x1<<bitPosi);
+		/* single or double only applies when sense is 0(edge trigger). */
+		if ( single == 0 )
+		  LPC_GPIO1->IBE &= ~(0x1<<bitPosi);
+		else
+		  LPC_GPIO1->IBE |= (0x1<<bitPosi);
+	  }
+	  else
+	  	LPC_GPIO1->IS |= (0x1<<bitPosi);
+	  if ( event == 0 )
+		LPC_GPIO1->IEV &= ~(0x1<<bitPosi);
+	  else
+		LPC_GPIO1->IEV |= (0x1<<bitPosi);  
+	break;
+	case PORT2:
+	  if ( sense == 0 )
+	  {
+		LPC_GPIO2->IS &= ~(0x1<<bitPosi);
+		/* single or double only applies when sense is 0(edge trigger). */
+		if ( single == 0 )
+		  LPC_GPIO2->IBE &= ~(0x1<<bitPosi);
+		else
+		  LPC_GPIO2->IBE |= (0x1<<bitPosi);
+	  }
+	  else
+	  	LPC_GPIO2->IS |= (0x1<<bitPosi);
+	  if ( event == 0 )
+		LPC_GPIO2->IEV &= ~(0x1<<bitPosi);
+	  else
+		LPC_GPIO2->IEV |= (0x1<<bitPosi);  
+	break;
+	case PORT3:
+	  if ( sense == 0 )
+	  {
+		LPC_GPIO3->IS &= ~(0x1<<bitPosi);
+		/* single or double only applies when sense is 0(edge trigger). */
+		if ( single == 0 )
+		  LPC_GPIO3->IBE &= ~(0x1<<bitPosi);
+		else
+		  LPC_GPIO3->IBE |= (0x1<<bitPosi);
+	  }
+	  else
+	  	LPC_GPIO3->IS |= (0x1<<bitPosi);
+	  if ( event == 0 )
+		LPC_GPIO3->IEV &= ~(0x1<<bitPosi);
+	  else
+		LPC_GPIO3->IEV |= (0x1<<bitPosi);	  
+	break;
+	default:
+	  break;
+  }
+  return;
+}
+
+/*****************************************************************************
+** Function name:		GPIOIntEnable
+**
+** Descriptions:		Enable Interrupt Mask for a port pin.
+**
+** parameters:			port num, bit position
+** Returned value:		None
+** 
+*****************************************************************************/
+void GPIOIntEnable( uint32_t portNum, uint32_t bitPosi )
+{
+  switch ( portNum )
+  {
+	case PORT0:
+	  LPC_GPIO0->IE |= (0x1<<bitPosi); 
+	break;
+ 	case PORT1:
+	  LPC_GPIO1->IE |= (0x1<<bitPosi);	
+	break;
+	case PORT2:
+	  LPC_GPIO2->IE |= (0x1<<bitPosi);	    
+	break;
+	case PORT3:
+	  LPC_GPIO3->IE |= (0x1<<bitPosi);	    
+	break;
+	default:
+	  break;
+  }
+  return;
+}
+
+/*****************************************************************************
+** Function name:		GPIOIntDisable
+**
+** Descriptions:		Disable Interrupt Mask for a port pin.
+**
+** parameters:			port num, bit position
+** Returned value:		None
+** 
+*****************************************************************************/
+void GPIOIntDisable( uint32_t portNum, uint32_t bitPosi )
+{
+  switch ( portNum )
+  {
+	case PORT0:
+	  LPC_GPIO0->IE &= ~(0x1<<bitPosi); 
+	break;
+ 	case PORT1:
+	  LPC_GPIO1->IE &= ~(0x1<<bitPosi);	
+	break;
+	case PORT2:
+	  LPC_GPIO2->IE &= ~(0x1<<bitPosi);	    
+	break;
+	case PORT3:
+	  LPC_GPIO3->IE &= ~(0x1<<bitPosi);	    
+	break;
+	default:
+	  break;
+  }
+  return;
+}
+
+/*****************************************************************************
+** Function name:		GPIOIntStatus
+**
+** Descriptions:		Get Interrupt status for a port pin.
+**
+** parameters:			port num, bit position
+** Returned value:		None
+** 
+*****************************************************************************/
+uint32_t GPIOIntStatus( uint32_t portNum, uint32_t bitPosi )
+{
+  uint32_t regVal = 0;
+
+  switch ( portNum )
+  {
+	case PORT0:
+	  if ( LPC_GPIO0->MIS & (0x1<<bitPosi) )
+		regVal = 1;
+	break;
+ 	case PORT1:
+	  if ( LPC_GPIO1->MIS & (0x1<<bitPosi) )
+		regVal = 1;	
+	break;
+	case PORT2:
+	  if ( LPC_GPIO2->MIS & (0x1<<bitPosi) )
+		regVal = 1;		    
+	break;
+	case PORT3:
+	  if ( LPC_GPIO3->MIS & (0x1<<bitPosi) )
+		regVal = 1;		    
+	break;
+	default:
+	  break;
+  }
+  return ( regVal );
+}
+
+/*****************************************************************************
+** Function name:		GPIOIntClear
+**
+** Descriptions:		Clear Interrupt for a port pin.
+**
+** parameters:			port num, bit position
+** Returned value:		None
+** 
+*****************************************************************************/
+void GPIOIntClear( uint32_t portNum, uint32_t bitPosi )
+{
+  switch ( portNum )
+  {
+	case PORT0:
+	  LPC_GPIO0->IC |= (0x1<<bitPosi); 
+	break;
+ 	case PORT1:
+	  LPC_GPIO1->IC |= (0x1<<bitPosi);	
+	break;
+	case PORT2:
+	  LPC_GPIO2->IC |= (0x1<<bitPosi);	    
+	break;
+	case PORT3:
+	  LPC_GPIO3->IC |= (0x1<<bitPosi);	    
+	break;
+	default:
+	  break;
+  }
+  return;
+}
+
+/******************************************************************************
+**                            End Of File
+******************************************************************************/
-- 
cgit v1.2.3