477 lines
11 KiB
C
477 lines
11 KiB
C
#include <stepper-process.h>
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#include <stepper-steps.h>
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#include <stepper.h>
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#include <stepper-move.h>
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#include <string.h>
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#include <interrupt-utils.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <net/uip.h>
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#include <dev/cc2420.h>
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#undef putchar
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static unsigned int
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parse_uint_hex(const char **pp, const char *end)
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{
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unsigned int v = 0;
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while(*pp < end) {
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char ch;
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if ((ch = **pp) >= '0' && ch <= '9') {
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v = v* 16 + (ch - '0');
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} else if (ch >= 'A' && ch <= 'F') {
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v = v* 16 + (ch - 'A') + 10;
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} else break;
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(*pp)++;
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}
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return v;
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}
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static int
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parse_int_hex(const char **pp, const char *end)
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{
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if (*pp == end) return 0;
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if (**pp == '-') {
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(*pp)++;
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return -parse_uint_hex(pp, end);
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} else {
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return parse_uint_hex(pp, end);
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}
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}
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static void
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skip_white(const char **pp, const char *end)
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{
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char ch;
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while(*pp < end && ((ch = **pp) == ' ' || ch == '\t')) (*pp)++;
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}
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static const char hex_chars[] =
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{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
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static void
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format_uint_hex(char **str, char *end, unsigned int v)
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{
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char buffer[10];
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char *p = buffer+10;
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if (*str == end) return;
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if (v == 0) {
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*(*str)++ = '0';
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return;
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}
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while(v > 0) {
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*--p = hex_chars[v&0xf];
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v >>= 4;
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}
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while((p < buffer+10) && (*str < end)) {
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*(*str)++ = *p++;
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}
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}
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static void
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format_int_hex(char **str, char *end, int v)
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{
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if (v < 0) {
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if (*str == end) return;
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*(*str)++ = '-';
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v = -v;
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}
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format_uint_hex(str, end, v);
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}
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static void
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format_ull_hex(char **str, char *end, unsigned long long int v)
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{
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char buffer[16];
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char *p = buffer+10;
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if (*str == end) return;
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if (v == 0) {
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*(*str)++ = '0';
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return;
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}
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while(v > 0) {
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*--p = hex_chars[v&0xf];
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v >>= 4;
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}
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while((p < buffer+10) && (*str < end)) {
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*(*str)++ = *p++;
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}
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}
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static void
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format_ll_hex(char **str, char *end, long long v)
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{
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if (v < 0) {
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if (*str == end) return;
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*(*str)++ = '-';
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v = -v;
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}
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format_ull_hex(str, end, v);
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}
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typedef struct _ReplyBuffer ReplyBuffer;
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struct _ReplyBuffer
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{
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char buffer[70]; /* Should be small enough to fit in one packet */
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char *write;
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};
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static ReplyBuffer tcp_reply;
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static ReplyBuffer udp_reply;
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#define REPLY_BUFFER_END(reply) ((reply)->buffer+sizeof((reply)->buffer))
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#define REPLY_BUFFER_LEFT(reply) \
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((reply)->buffer+sizeof((reply)->buffer) - (reply)->write)
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static void
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reply_char(ReplyBuffer *reply, char c)
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{
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if (REPLY_BUFFER_LEFT(reply) > 0) {
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*reply->write++ = c;
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}
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}
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static void
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reply_str(ReplyBuffer *reply, char *str)
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{
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while(reply->write < REPLY_BUFFER_END(reply) && *str != '\0')
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*reply->write++ = *str++;
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}
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static void
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stepper_reply(ReplyBuffer *reply, StepperResult res)
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{
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switch(res) {
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case STEPPER_OK:
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reply_str(reply, "OK");
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break;
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case STEPPER_ERR_MEM:
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reply_str(reply, "ERR MEM");
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break;
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case STEPPER_ERR_TOO_LATE:
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reply_str(reply, "ERR LATE");
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break;
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case STEPPER_ERR_INDEX: /* Sholdn't happen here */
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reply_str(reply, "ERR INDEX");
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break;
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default:
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reply_str(reply, "ERR");
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}
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reply_char(reply, '\n');
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}
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#define CHECK_INPUT_LEFT(x) \
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do {\
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if ((x) > inend - input_line) {reply_str(reply, "ERR\n");return 0;}\
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} while(0)
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static int
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handle_line(const char *input_line, const char *inend, ReplyBuffer *reply)
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{
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unsigned long when;
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#if 0
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{
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const char *p = input_line;
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printf("Got line: '");
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while(p < inend) {
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putchar(*p++);
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}
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printf("'\n");
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fsync(1);
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}
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#endif
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skip_white(&input_line, inend);
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CHECK_INPUT_LEFT(1);
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if (*input_line == '#') {
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input_line++;
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reply_char(reply, '#');
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while (input_line < inend &&*input_line != ' ') {
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reply_char(reply, *input_line++);
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}
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reply_char(reply, ' ');
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}
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skip_white(&input_line, inend);
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if (*input_line == '@') {
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input_line++;
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when = parse_uint_hex(&input_line, inend);
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} else {
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when = stepper_current_period() + 3;
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}
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skip_white(&input_line, inend);
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CHECK_INPUT_LEFT(1);
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if (input_line[0] == 'L' || input_line[0] == 'R') {
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unsigned int stepper_index = (input_line[0] == 'R' ? 1 : 0);
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CHECK_INPUT_LEFT(1);
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input_line++;
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if (input_line[0] == 'S') {
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int speed;
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input_line++;
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if (input_line == inend) {
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/* printf("Speed: %ld\n",
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stepper_current_velocity(stepper_index)/VEL_SCALE);*/
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reply_char(reply, input_line[-2]);
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reply_char(reply, 'S');
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format_int_hex(&reply->write, REPLY_BUFFER_END(reply),
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stepper_current_velocity(stepper_index)/VEL_SCALE);
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reply_char(reply, '\n');
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} else {
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speed = parse_int_hex(&input_line, inend);
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if (*input_line == ',') {
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StepperResult res;
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unsigned int acc;
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input_line++;
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acc = parse_uint_hex(&input_line, inend);
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/* printf("Speed=%d, Acc=%u\n", speed, acc); */
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res = stepper_set_velocity(stepper_index, &when,
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acc, speed*VEL_SCALE);
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stepper_reply(reply, res);
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} else {
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reply_str(reply, "ERR\n");
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}
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}
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} else if (input_line[0] == 'C') {
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reply_char(reply, input_line[-1]);
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reply_char(reply, 'C');
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format_ll_hex(&reply->write, REPLY_BUFFER_END(reply),
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stepper_current_step(stepper_index));
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reply_char(reply, '\n');
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} else if (input_line[0] == 'M') {
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unsigned int speed;
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unsigned int acc;
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int move;
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input_line++;
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speed = parse_uint_hex(&input_line, inend);
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CHECK_INPUT_LEFT(1);
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if (*input_line == ',') {
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input_line++;
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acc = parse_uint_hex(&input_line, inend);
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if (*input_line == ',') {
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StepperResult res;
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input_line++;
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move = parse_int_hex(&input_line, inend);
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/*printf("Speed=%u, Acc=%u, Move=%d\n", speed, acc, move);*/
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res = stepper_move(stepper_index, &when,
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acc,speed*VEL_SCALE,move*DIST_SCALE);
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stepper_reply(reply, res);
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} else {
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reply_str(reply, "ERR\n");
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}
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} else {
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reply_str(reply, "ERR\n");
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}
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} else {
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reply_str(reply, "ERR\n");
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}
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} else if (input_line[0] == 'E') {
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STEPPER_ENABLE();
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printf("Stepper enabled\n");
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reply_str(reply, "OK\n");
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} else if (input_line[0] == 'D') {
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STEPPER_DISABLE();
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printf("Stepper disabled\n");
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reply_str(reply, "OK\n");
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} else if (input_line[0] == 'p') {
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reply_char(reply, 'p');
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format_int_hex(&reply->write, REPLY_BUFFER_END(reply), cc2420_last_rssi);
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reply_char(reply, ',');
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format_uint_hex(&reply->write, REPLY_BUFFER_END(reply),
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cc2420_last_correlation);
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reply_char(reply, '\n');
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} else if (input_line[0] == 'T') {
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reply_char(reply, 'T');
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format_int_hex(&reply->write, REPLY_BUFFER_END(reply),
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stepper_current_period());
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reply_char(reply, '\n');
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} else if (input_line[0] == 'q') {
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return 1;
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} else {
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reply_str(reply, "ERR\n");
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}
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return 0;
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}
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static unsigned int transmit_len = 0;
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static void
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send_reply()
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{
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if (transmit_len == 0) {
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transmit_len = tcp_reply.write - tcp_reply.buffer;
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if (transmit_len > 0) {
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/* printf("Sending len = %d\n", transmit_len); */
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uip_send(tcp_reply.buffer, transmit_len);
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}
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}
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}
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static void
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handle_connection()
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{
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static char exiting = 0;
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static char line_buffer[100];
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static char *line_end;
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if (uip_connected()) {
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exiting = 0;
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transmit_len = 0;
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line_end = line_buffer;
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tcp_reply.write = tcp_reply.buffer;
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reply_str(&tcp_reply, "Ready\n");
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send_reply();
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}
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if (uip_acked()) {
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if (tcp_reply.write - tcp_reply.buffer > transmit_len) {
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memmove(tcp_reply.buffer, tcp_reply.buffer + transmit_len,
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tcp_reply.write - tcp_reply.buffer - transmit_len);
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}
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tcp_reply.write -= transmit_len;
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/* printf("Acked: %d left\n", reply_buffer.write-reply_buffer.buffer); */
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transmit_len = 0;
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if (exiting && tcp_reply.write == tcp_reply.buffer) {
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uip_close();
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exiting = 0;
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}
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}
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if (uip_newdata()) {
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const char *read_pos = uip_appdata;
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const char *read_end = read_pos + uip_len;
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/* printf("Got data\n"); */
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while(read_pos < read_end) {
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if (line_end == line_buffer+sizeof(line_buffer)) {
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/* Buffer too small, just discard everything */
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line_end = line_buffer;
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}
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*line_end++ = *read_pos++;
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if (line_end[-1] == '\n' || line_end[-1] == '\r' || line_end[-1] == ';'){
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if (line_end - 1 != line_buffer) {
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if (handle_line(line_buffer, line_end - 1, &tcp_reply)) {
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send_reply();
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/* Postpone closing if there's reply data left to be sent. */
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if (transmit_len == 0)
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uip_close();
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else
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exiting = 1;
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break;
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}
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}
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line_end = line_buffer;
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}
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}
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send_reply();
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}
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if (uip_poll()) {
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send_reply();
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}
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if(uip_rexmit()) {
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printf("Retransmit\n");
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if (transmit_len > 0)
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uip_send(tcp_reply.buffer, transmit_len);
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}
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}
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PROCESS(udp_stepper_process, "UDP stepper process");
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PROCESS_THREAD(udp_stepper_process, ev, data)
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{
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static struct etimer timer;
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static struct uip_udp_conn *conn;
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static char listening = 1; /* Listen for connections from anyone */
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static uip_ipaddr_t any;
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PROCESS_EXITHANDLER(goto exit);
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PROCESS_BEGIN();
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printf("udp_stepper_process starting\n");
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uip_ipaddr(&any, 0,0,0,0);
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conn = udp_new(&any, HTONS(0), NULL);
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if (!conn) goto exit;
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uip_udp_bind(conn, HTONS(1010));
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etimer_set(&timer, CLOCK_SECOND*2);
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while(1) {
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PROCESS_YIELD();
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if(ev == tcpip_event) {
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if (uip_newdata()) {
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struct uip_udpip_hdr *header = (struct uip_udpip_hdr *)uip_buf;
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const char *line_start = uip_appdata;
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const char *line_end = line_start;
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const char *packet_end = line_start + uip_len;
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udp_reply.write = udp_reply.buffer;
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while(line_end < packet_end) {
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if (*line_end == '\n' || *line_end == '\r' || *line_end == ';' ) {
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if (line_end != line_start) {
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handle_line(line_start, line_end, &udp_reply);
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}
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line_start = line_end+1;
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}
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line_end++;
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}
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/* Check if we are connected to a client, if not reconnect */
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if (listening) {
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uip_udp_remove(conn);
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conn = udp_new(&header->srcipaddr, header->srcport, &conn);
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if (!conn) goto exit;
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uip_udp_bind(conn, HTONS(1010));
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listening = 0;
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}
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etimer_reset(&timer);
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tcpip_poll_udp(conn);
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} else if (uip_poll()) {
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if (data == &conn) {
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uip_send(udp_reply.buffer, udp_reply.write - udp_reply.buffer);
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/* printf("sent %ld\n", udp_reply.write - udp_reply.buffer); */
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}
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}
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} else if (ev == PROCESS_EVENT_TIMER) {
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uip_udp_remove(conn);
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conn = udp_new(&any, HTONS(0), NULL);
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if (!conn) goto exit;
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uip_udp_bind(conn, HTONS(1010));
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listening = 1;
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}
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}
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exit:
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/* Contiki does automatic garbage collection of uIP state and we
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* need not worry about that. */
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printf("udprecv_process exiting\n");
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PROCESS_END();
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}
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PROCESS(stepper_process, "Stepper control process");
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PROCESS_THREAD(stepper_process, ev, data)
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{
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PROCESS_EXITHANDLER(goto exit);
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PROCESS_BEGIN();
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tcp_listen(HTONS(1010));
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process_start(&udp_stepper_process, NULL);
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printf("Stepper starting\n");
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
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if(uip_connected()) {
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/* printf("connected\n"); */
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handle_connection(); /* Initialise parser */
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while(!(uip_aborted() || uip_closed() || uip_timedout())) {
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PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
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handle_connection();
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}
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}
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printf("disconnected\n");
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}
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exit:
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/* Contiki does automatic garbage collection of uIP state and we
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* need not worry about that. */
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printf("Stepper exiting\n");
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PROCESS_END();
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}
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