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https://github.com/isometimes/rpi4-osdev
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Some tidying up in part14 and part15
This commit is contained in:
Adam Greenwood-Byrne
parent
bc2ecc934d
commit
3c81e9622d
3 changed files with 12 additions and 111 deletions
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@ -2,7 +2,6 @@
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#include "../include/io.h"
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#include "../include/spi.h"
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#include "../include/multicore.h"
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#include "../net/enc28j60.h"
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#include "kernel.h"
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void initProgress(void)
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@ -4,58 +4,13 @@
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ENC_HandleTypeDef handle;
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// Structure for Ethernet header
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typedef struct {
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uint8_t DestAddrs[6];
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uint8_t SrcAddrs[6];
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uint16_t type;
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} EtherNetII;
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// Ethernet packet types
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#define ARPPACKET 0x0608
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#define IPPACKET 0x0008
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// Structure for an ARP Packet
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typedef struct {
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EtherNetII eth;
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uint16_t hardware;
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uint16_t protocol;
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uint8_t hardwareSize;
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uint8_t protocolSize;
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uint16_t opCode;
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uint8_t senderMAC[6];
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uint8_t senderIP[4];
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uint8_t targetMAC[6];
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uint8_t targetIP[4];
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} ARP;
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// ARP OpCodes
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#define ARPREPLY 0x0200
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#define ARPREQUEST 0x0100
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// ARP hardware types
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#define ETHERNET 0x0100
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// MAC address to be assigned to the ENC28J60
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uint8_t myMAC[6] = { 0xc0, 0xff, 0xee, 0xc0, 0xff, 0xee };
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// Router MAC is not known to start with, and requires an ARP reply to find out
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uint8_t routerMAC[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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unsigned char myMAC[6] = { 0xc0, 0xff, 0xee, 0xc0, 0xff, 0xee };
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// IP address to be assigned to the ENC28J60
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uint8_t deviceIP[4] = { 192, 168, 0, 66 };
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// IP Address of the router, whose hardware address we will find using the ARP request
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uint8_t routerIP[4] = { 192, 168, 0, 1 };
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unsigned char deviceIP[4] = { 192, 168, 0, 66 };
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// HELPER FUNCTIONS
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@ -90,60 +45,16 @@ uint8_t memcmp(void *str1, void *str2, unsigned count)
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return 0;
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}
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void enc28j60PacketSend(unsigned short buflen, void *buffer) {
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if (ENC_RestoreTXBuffer(&handle, buflen) == 0) {
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ENC_WriteBuffer((unsigned char *) buffer, buflen);
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handle.transmitLength = buflen;
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ENC_Transmit(&handle);
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}
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}
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// MAIN FUNCTIONS
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void SendArpPacket(uint8_t *targetIP, uint8_t *deviceMAC)
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{
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/* Parameters:
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* targetIP - The target IP Address for the ARP request (the one whose hardware
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* address we want)
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* deviceMAC - The MAC address of the ENC28J60, i.e. the source MAC for the ARP
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* request
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*/
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ARP arpPacket;
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// The source of the packet will be the ENC28J60 MAC address
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memcpy(arpPacket.eth.SrcAddrs, deviceMAC, 6);
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// The destination is broadcast - a MAC address of FF:FF:FF:FF:FF:FF */
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memset(arpPacket.eth.DestAddrs, 0xFF, 6);
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arpPacket.eth.type = ARPPACKET;
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arpPacket.hardware = ETHERNET;
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// We want an IP address resolved
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arpPacket.protocol = IPPACKET;
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arpPacket.hardwareSize = 0x06; // sizeof(deviceMAC);
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arpPacket.protocolSize = 0x04; // sizeof(deviceIP);
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arpPacket.opCode = ARPREQUEST;
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// Target MAC is set to 0 as it is unknown
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memset(arpPacket.targetMAC, 0, 6);
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// Sender MAC is the ENC28J60's MAC address
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memcpy(arpPacket.senderMAC, deviceMAC, 6);
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// The target IP is the IP address we want resolved
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memcpy(arpPacket.targetIP, targetIP, 4);
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// Check if the last reply has come from an IP address that we want i.e. someone else is already using it
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if (!memcmp(targetIP, deviceIP, 4)) {
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// Yes, someone is using our IP so set the sender IP to 0.0.0.0
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memset(arpPacket.senderIP, 0, 4);
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} else {
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// No, nobody is using our IP so we can use it confidently
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memcpy(arpPacket.senderIP, deviceIP, 4);
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}
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// Send the packet
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debugstr("Sending ARP request.");
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debugcrlf();
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enc28j60PacketSend(sizeof(ARP), &arpPacket);
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}
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void net_test(void)
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{
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while (1) {
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@ -155,14 +66,6 @@ void net_test(void)
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}
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}
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void enc28j60PacketSend(unsigned short buflen, void *buffer) {
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if (ENC_RestoreTXBuffer(&handle, buflen) == 0) {
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ENC_WriteBuffer((unsigned char *) buffer, buflen);
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handle.transmitLength = buflen;
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ENC_Transmit(&handle);
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}
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}
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void init_network(void)
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{
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handle.Init.DuplexMode = ETH_MODE_HALFDUPLEX;
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@ -189,11 +92,11 @@ void init_network(void)
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debugstr("done.");
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debugcrlf();
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// Re-enable global interrupts
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ENC_EnableInterrupts(EIE_INTIE);
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debugstr("Initialising the TCP stack... ");
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init_udp_or_www_server(myMAC, deviceIP);
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debugstr("done.");
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debugcrlf();
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// Re-enable global interrupts
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ENC_EnableInterrupts(EIE_INTIE);
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}
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@ -2,7 +2,6 @@
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#include "../include/io.h"
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#include "../include/spi.h"
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#include "../include/multicore.h"
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#include "../net/enc28j60.h"
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#include "kernel.h"
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void initProgress(void)
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