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improved file upload via IrDA

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This commit is contained in:
Joey Castillo 2025-05-17 17:52:25 -04:00
parent fd4744b144
commit 5111beac86
1 changed files with 43 additions and 48 deletions
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91
watch-faces/demo/irda_demo_face.c
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@ -63,58 +63,53 @@ bool irda_demo_face_loop(movement_event_t event, void *context) {
case EVENT_ACTIVATE:
case EVENT_TICK:
{
char data[32];
char filename[9];
char content[30];
size_t bytes_read = uart_read_instance(0, data, 32);
char data[64];
size_t bytes_read = uart_read_instance(0, data, 64);
watch_clear_display();
watch_display_text_with_fallback(WATCH_POSITION_TOP, "IrDA", "IR");
if (bytes_read) {
// data is in the format: ">FILENAME>CONTENT" followed by a one-byte checksum
uint8_t checksum = 0;
for (size_t i = 0; i < bytes_read - 1; i++) {
checksum += data[i];
}
if (checksum != data[bytes_read - 1]) {
// data is in the following format, where S is Size, F is Filename and C is checksum:
// SSFFFFFFFFFFFFCC
// after that, we get SS bytes of data, followed by a two-byte checksum
uint16_t expected_size = ((uint16_t *)data)[0];
uint16_t expected_checksum = ((uint16_t *)data)[7];
uint16_t checksum = 0;
for (size_t i = 0; i < 14; i++) checksum += data[i];
if (checksum != expected_checksum) {
// failed
movement_force_led_on(48, 0, 0);
} else {
// parse the data
if (data[0] != '>') {
// failed
movement_force_led_on(48, 30, 0);
} else {
size_t i = 1;
while (data[i] != '>' && i < 9) {
filename[i - 1] = data[i];
i++;
}
if (i == 9) {
// failed
movement_force_led_on(48, 0, 30);
} else {
filename[i - 1] = 0;
i++;
size_t j = 0;
while (i < bytes_read - 1) {
content[j] = data[i];
i++;
j++;
}
content[j] = 0;
}
}
// write the data to the file
filesystem_write_file(filename, content, strlen(content));
movement_force_led_on(0, 48, 0);
watch_display_text_with_fallback(WATCH_POSITION_TOP, "BAD ", "BA");
watch_display_text(WATCH_POSITION_BOTTOM, "HEADER");
break;
}
char buf[14];
snprintf(buf, 11, "IR%2d%c%c%c%c%c%c", bytes_read, data[1], data[2], data[3], data[4], data[5], data[6]);
watch_clear_display();
watch_display_text(WATCH_POSITION_FULL, buf);
data[31] = 0;
printf("%s\n", data);
printf("%s\n", buf);
// valid header! To make it easier on ourselves, we're going to make byte 14 zero...
data[14] = 0;
// so that now buf[2] points to our null-terminated filename.
char *filename = data + 2;
// now let's check the data.
checksum = 0;
memcpy(&expected_checksum, data + 16 + expected_size, 2);
for (uint16_t i = 16; i < 16 + expected_size; i++) checksum += data[i];
if (checksum != expected_checksum) {
// failed
watch_display_text_with_fallback(WATCH_POSITION_TOP, "BAD ", "BA");
watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "DATA ", " Data ");
break;
}
// Valid data! Write it to the file system.
filesystem_write_file(filename, data + 16, expected_size);
watch_display_text_with_fallback(WATCH_POSITION_TOP, "RECVD", "RC");
char buf[8];
sprintf(buf, "%4db ", expected_size);
watch_display_text(WATCH_POSITION_BOTTOM, buf);
} else {
movement_force_led_off();
watch_display_text(WATCH_POSITION_FULL, " no dat");
}
}