You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
2.8 KiB
128 lines
2.8 KiB
#include <esp8266.h>
|
|
#include <httpd.h>
|
|
#include "page_waveform.h"
|
|
|
|
#include "sampling.h"
|
|
#include "serial.h"
|
|
#include "payload_parser.h"
|
|
|
|
// -------------------------------------------------------------------------------
|
|
|
|
// Read multiple samples from the ADC as JSON
|
|
|
|
typedef struct {
|
|
uint16_t total_count;
|
|
uint16_t done_count;
|
|
bool success;
|
|
} tplReadSamplesJSON_state;
|
|
|
|
|
|
int FLASH_FN tplWaveformJSON(HttpdConnData *connData, char *token, void **arg)
|
|
{
|
|
char buff20[20];
|
|
int len;
|
|
|
|
tplReadSamplesJSON_state *st = *arg;
|
|
|
|
if (token == NULL) {
|
|
// end of template, cleanup
|
|
if (st != NULL) free(st);
|
|
return HTTPD_CGI_DONE; // cleanup
|
|
}
|
|
|
|
if (st == NULL) {
|
|
// first call - allocate the struct
|
|
st = malloc(sizeof(tplReadSamplesJSON_state));
|
|
*arg = st;
|
|
|
|
// check how many samples are requested
|
|
uint16_t count = 1;
|
|
len = httpdFindArg(connData->getArgs, "n", buff20, sizeof(buff20));
|
|
if (len != -1) count = (uint16_t)atoi(buff20);
|
|
if (count > 4096) {
|
|
warn("Requested %d samples, capping at 4096.", count);
|
|
count = 4096;
|
|
}
|
|
|
|
uint32_t freq = 4096;
|
|
len = httpdFindArg(connData->getArgs, "fs", buff20, sizeof(buff20));
|
|
if (len != -1) freq = (uint32_t)atoi(buff20);
|
|
if (freq > 5000000) {
|
|
warn("Requested fs %d Hz, capping at 5 MHz.", freq);
|
|
freq = 5000000;
|
|
}
|
|
if (freq == 0) {
|
|
error("Requested fs 0 Hz, using 1 Hz");
|
|
freq = 1;
|
|
}
|
|
|
|
st->total_count = count;
|
|
st->done_count = 0;
|
|
st->success = true; // success true by default
|
|
|
|
// REQUEST THE DATA
|
|
meas_request_data(count, freq);
|
|
}
|
|
|
|
// the "success" field is after the data,
|
|
// so if readout fails, success can be set to false.
|
|
|
|
if (strcmp(token, "values") == 0) {
|
|
|
|
// Wait for a chunk
|
|
|
|
uint8_t *chunk = NULL;
|
|
uint16_t chunk_len = 0;
|
|
|
|
// 5 secs or 500 ms
|
|
for (int i = 0; i < (st->done_count == 0 ? 5000*100: 500*100); i++) {
|
|
uart_poll();
|
|
if (meas_chunk_ready()) break;
|
|
os_delay_us(10); // 1 ms
|
|
system_soft_wdt_feed();
|
|
}
|
|
chunk = meas_get_chunk(&chunk_len);
|
|
|
|
if (!chunk) {
|
|
// abort, proceed to the next field.
|
|
meas_close();
|
|
st->success = false;
|
|
return HTTPD_CGI_DONE;
|
|
}
|
|
|
|
PayloadParser pp = pp_start(chunk, chunk_len);
|
|
|
|
// chunk of data...
|
|
for (; pp.ptr < pp.len; st->done_count++) {
|
|
// preceding comma if not the first number
|
|
if (st->done_count > 0) {
|
|
httpdSend(connData, ", ", 2);
|
|
}
|
|
|
|
uint32_t samp = pp_u32(&pp);
|
|
|
|
// print the number
|
|
os_sprintf(buff20, "%d", samp);
|
|
httpdSend(connData, buff20, -1);
|
|
}
|
|
|
|
// wait for more in this substitution
|
|
if (st->done_count < st->total_count) {
|
|
meas_request_next_chunk();
|
|
return HTTPD_CGI_MORE; // more numbers to come
|
|
} else {
|
|
// we're done
|
|
meas_close();
|
|
return HTTPD_CGI_DONE;
|
|
}
|
|
|
|
} else if (strcmp(token, "success") == 0) {
|
|
// success status
|
|
httpdSend(connData, (st->success ? "true" : "false"), -1);
|
|
}
|
|
|
|
return HTTPD_CGI_DONE;
|
|
}
|
|
|
|
|
|
|
|
|