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/*
* FreeRTOS Kernel V10.3.0
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
/* Standard includes. */
#include <string.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* uip includes. */
#include "uip.h"
#include "uip_arp.h"
#include "httpd.h"
#include "timer.h"
#include "clock-arch.h"
/* Demo includes. */
#include "EthDev_LPC17xx.h"
#include "EthDev.h"
#include "ParTest.h"
/*-----------------------------------------------------------*/
/* How long to wait before attempting to connect the MAC again. */
#define uipINIT_WAIT ( 100 / portTICK_PERIOD_MS )
/* Shortcut to the header within the Rx buffer. */
#define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
/* Standard constant. */
#define uipTOTAL_FRAME_HEADER_SIZE 54
/*-----------------------------------------------------------*/
/*
* Setup the MAC address in the MAC itself, and in the uIP stack.
*/
static void prvSetMACAddress( void );
/*
* Port functions required by the uIP stack.
*/
void clock_init( void );
clock_time_t clock_time( void );
/*-----------------------------------------------------------*/
/* The semaphore used by the ISR to wake the uIP task. */
SemaphoreHandle_t xEMACSemaphore = NULL;
/*-----------------------------------------------------------*/
void clock_init(void)
{
/* This is done when the scheduler starts. */
}
/*-----------------------------------------------------------*/
clock_time_t clock_time( void )
{
return xTaskGetTickCount();
}
/*-----------------------------------------------------------*/
void vuIP_Task( void *pvParameters )
{
portBASE_TYPE i;
uip_ipaddr_t xIPAddr;
struct timer periodic_timer, arp_timer;
extern void ( vEMAC_ISR_Wrapper )( void );
( void ) pvParameters;
/* Initialise the uIP stack. */
timer_set( &periodic_timer, configTICK_RATE_HZ / 2 );
timer_set( &arp_timer, configTICK_RATE_HZ * 10 );
uip_init();
uip_ipaddr( xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
uip_sethostaddr( xIPAddr );
uip_ipaddr( xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
uip_setnetmask( xIPAddr );
httpd_init();
/* Create the semaphore used to wake the uIP task. */
vSemaphoreCreateBinary( xEMACSemaphore );
/* Initialise the MAC. */
while( lEMACInit() != pdPASS )
{
vTaskDelay( uipINIT_WAIT );
}
portENTER_CRITICAL();
{
LPC_EMAC->IntEnable = ( INT_RX_DONE | INT_TX_DONE );
/* Set the interrupt priority to the max permissible to cause some
interrupt nesting. */
NVIC_SetPriority( ENET_IRQn, configEMAC_INTERRUPT_PRIORITY );
/* Enable the interrupt. */
NVIC_EnableIRQ( ENET_IRQn );
prvSetMACAddress();
}
portEXIT_CRITICAL();
for( ;; )
{
/* Is there received data ready to be processed? */
uip_len = ulGetEMACRxData();
if( ( uip_len > 0 ) && ( uip_buf != NULL ) )
{
/* Standard uIP loop taken from the uIP manual. */
if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
{
uip_arp_ipin();
uip_input();
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if( uip_len > 0 )
{
uip_arp_out();
vSendEMACTxData( uip_len );
}
}
else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
{
uip_arp_arpin();
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if( uip_len > 0 )
{
vSendEMACTxData( uip_len );
}
}
}
else
{
if( timer_expired( &periodic_timer ) && ( uip_buf != NULL ) )
{
timer_reset( &periodic_timer );
for( i = 0; i < UIP_CONNS; i++ )
{
uip_periodic( i );
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if( uip_len > 0 )
{
uip_arp_out();
vSendEMACTxData( uip_len );
}
}
/* Call the ARP timer function every 10 seconds. */
if( timer_expired( &arp_timer ) )
{
timer_reset( &arp_timer );
uip_arp_timer();
}
}
else
{
/* We did not receive a packet, and there was no periodic
processing to perform. Block for a fixed period. If a packet
is received during this period we will be woken by the ISR
giving us the Semaphore. */
xSemaphoreTake( xEMACSemaphore, configTICK_RATE_HZ / 2 );
}
}
}
}
/*-----------------------------------------------------------*/
static void prvSetMACAddress( void )
{
struct uip_eth_addr xAddr;
/* Configure the MAC address in the uIP stack. */
xAddr.addr[ 0 ] = configMAC_ADDR0;
xAddr.addr[ 1 ] = configMAC_ADDR1;
xAddr.addr[ 2 ] = configMAC_ADDR2;
xAddr.addr[ 3 ] = configMAC_ADDR3;
xAddr.addr[ 4 ] = configMAC_ADDR4;
xAddr.addr[ 5 ] = configMAC_ADDR5;
uip_setethaddr( xAddr );
}
/*-----------------------------------------------------------*/
void vApplicationProcessFormInput( char *pcInputString )
{
char *c;
const unsigned long ulLEDNo = 3;
/* Process the form input sent by the IO page of the served HTML. */
c = strstr( pcInputString, "?" );
if( c )
{
/* Turn LED's on or off in accordance with the check box status. */
if( strstr( c, "LED0=1" ) != NULL )
{
/* Set LED7. */
vParTestSetLED( ulLEDNo, pdFALSE );
}
else
{
/* Clear LED7. */
vParTestSetLED( ulLEDNo, pdTRUE );
}
}
}
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