Joe Danlloh
ddd
Fork of
EthernetTester
by 
Michael Wei
Diff: main.cpp
- Revision:
- 1:818e764b86f2
- Parent:
- 0:83f7908c81b1
--- a/main.cpp Thu Jan 21 08:34:39 2010 +0000
+++ b/main.cpp Thu Aug 03 10:26:55 2017 +0000
@@ -1,199 +1,32 @@
#include "mbed.h"
-#include "lwip/opt.h"
-#include "lwip/stats.h"
-#include "lwip/sys.h"
-#include "lwip/pbuf.h"
-#include "lwip/udp.h"
-#include "lwip/tcp.h"
-#include "lwip/dns.h"
-#include "lwip/dhcp.h"
-#include "lwip/init.h"
-#include "lwip/netif.h"
-#include "netif/etharp.h"
-#include "netif/loopif.h"
-#include "device.h"
+
+
-Ethernet ethernet;
-DigitalOut ledLink(p30);
-DigitalOut ledActivity(p29);
-DigitalOut ledStage0 (LED1);
-DigitalOut ledStage1 (LED2);
-DigitalOut ledStage2 (LED3);
-DigitalOut ledTCP80 (LED4);
-
-volatile char stage = 0;
-
-Ticker stage_blinker;
-
-struct netif netif_data;
-
-const char testPage[] = "HTTP/1.1 200 OK\r\n"
- "Content-Type: text/html\r\n"
- "Connection: Close\r\n\r\n"
- "<html>"
- "<head>"
- "<title>mbed test page</title>"
- "<style type='text/css'>"
- "body{font-family:'Arial, sans-serif', sans-serif;font-size:.8em;background-color:#fff;}"
- "</style>"
- "</head>"
- "<body>%s</body></html>\r\n\r\n";
+void setup() {
+//setup SPI, 8 bit data, high steady state clock,
+//second edge capture, 1MHz clock rate
+spi.format(8,3);
+spi.frequency(1000000);
+}
-char buffer[1024];
-char temp[1024];
-err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) {
- struct netif *netif = &netif_data;
- ledTCP80 = true;
- printf("TCP callback from %d.%d.%d.%d\r\n", ip4_addr1(&(pcb->remote_ip)),ip4_addr2(&(pcb->remote_ip)),ip4_addr3(&(pcb->remote_ip)),ip4_addr4(&(pcb->remote_ip)));
- char *data;
- /* Check if status is ok and data is arrived. */
- if (err == ERR_OK && p != NULL) {
- /* Inform TCP that we have taken the data. */
- tcp_recved(pcb, p->tot_len);
- data = static_cast<char *>(p->payload);
- /* If the data is a GET request we can handle it. */
- if (strncmp(data, "GET ", 4) == 0) {
- printf("Handling GET request...\r\n");
- printf("Request:\r\n%s\r\n", data);
-
- //generate the test page
- time_t seconds = time(NULL);
- sprintf(temp, "<h1>Congratulations!</h1>If you can see this page, your mbed is working properly."
- "<h2>mbed Configuration</h2>"
- "mbed RTC time:%s<br/>"
- "mbed HW address: %02x:%02x:%02x:%02x:%02x:%02x<br/>"
- "mbed IP Address: %s<br/>",
- ctime(&seconds),
- (char*) netif->hwaddr[0],
- (char*) netif->hwaddr[1],
- (char*) netif->hwaddr[2],
- (char*) netif->hwaddr[3],
- (char*) netif->hwaddr[4],
- (char*) netif->hwaddr[5],
- inet_ntoa(*(struct in_addr*)&(netif->ip_addr))
- );
- sprintf(buffer, testPage, temp);
- if (tcp_write(pcb, (void *)buffer, strlen(buffer), 1) == ERR_OK) {
- tcp_output(pcb);
- printf("Closing connection...\r\n");
- tcp_close(pcb);
- }
- }
- else
- {
- printf("Non GET request...\r\nRequest:\r\n%s\r\n", data);
- }
-
- pbuf_free(p);
+void loop() {
+ for(int level=0; level<255; level++) {
+ digitalPotWrite(level);
+ wait(0.1);
+ }
+ //wait a second at the top
+ wait(1);
+ for(int level = 0; level < 255; level++) {
+ digitalPotWrite(255-level);
+ wait(0.1);
}
- else {
- /* No data arrived */
- /* That means the client closes the connection and sent us a packet with FIN flag set to 1. */
- /* We have to cleanup and destroy out TCPConnection. */
- printf("Connection closed by client.\r\n");
- pbuf_free(p);
- }
- /* Don't panic! Everything is fine. */
- ledTCP80 = false;
- return ERR_OK;
-}
-/* Accept an incomming call on the registered port */
-err_t accept_callback(void *arg, struct tcp_pcb *npcb, err_t err) {
- LWIP_UNUSED_ARG(arg);
- /* Subscribe a receive callback function */
- tcp_recv(npcb, &recv_callback);
- /* Don't panic! Everything is fine. */
- return ERR_OK;
-}
-
-void stageblinker()
-{
- switch (stage)
- {
- case 0:
- ledStage0 = !ledStage0;
- ledStage1 = false;
- ledStage2 = false;
- break;
- case 1:
- ledStage0 = true;
- ledStage1 = !ledStage1;
- ledStage2 = false;
- break;
- case 2:
- ledStage0 = true;
- ledStage1 = true;
- ledStage2 = true;
- stage_blinker.detach();
- break;
- }
-}
-
-int main() {
- printf("mBed Ethernet Tester 1.0\r\nStarting Up...\r\n");
- stage = 0;
- struct netif *netif = &netif_data;
- struct ip_addr ipaddr;
- struct ip_addr netmask;
- struct ip_addr gateway;
- Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
- stage_blinker.attach_us(&stageblinker, 1000*500);
-
- char *hostname = "my-mbed";
-
- printf("Configuring device for DHCP...\r\n");
- /* Start Network with DHCP */
- IP4_ADDR(&netmask, 255,255,255,255);
- IP4_ADDR(&gateway, 0,0,0,0);
- IP4_ADDR(&ipaddr, 0,0,0,0);
- /* Initialise after configuration */
- lwip_init();
- netif->hwaddr_len = ETHARP_HWADDR_LEN;
- device_address((char *)netif->hwaddr);
- netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
- netif->hostname = hostname;
- netif_set_default(netif);
- dhcp_start(netif); // <-- Use DHCP
-
- /* Initialise all needed timers */
- tickARP.attach_us( ðarp_tmr, ARP_TMR_INTERVAL * 1000);
- tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
- tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
- dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
- dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
- dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
- stage = 1;
- while (!netif_is_up(netif)) {
- ledLink = ethernet.link();
- device_poll();
- }
-
-/*
- while (!(netif->dhcp->state == DHCP_BOUND || netif->dhcp->state == DHCP_PERMANENT))
- {
- ledLink = ethernet.link();
- device_poll();
- //printf("Waiting for DHCP response, state = %d\r\n", netif->dhcp->state);
- //wait_ms(100);
- }
- */
- stage = 2;
- printf("Interface is up, local IP is %s\r\n",
-inet_ntoa(*(struct in_addr*)&(netif->ip_addr)));
-
- printf("Starting Web Server...\r\n");
-
- /* Bind a function to a tcp port */
- struct tcp_pcb *pcb = tcp_new();
- if (tcp_bind(pcb, IP_ADDR_ANY, 80) == ERR_OK) {
- pcb = tcp_listen(pcb);
- tcp_accept(pcb, &accept_callback);
- }
-
- printf("Waiting for connection...\r\n");
- while(1) {
- device_poll();
- ledLink = ethernet.link();
- }
-}
+void digitalPotWrite(int addresss, int value) {
+ //take the SS pin low to select the chip
+ cs = 0;
+ //send in the address and value via SPI
+ spi.write(address);
+ spi.write(value);
+ //take the SS pin high to deselect the chip
+ cs = 1;
+}
\ No newline at end of file