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wareya/spi_recorder.ino

Last active May 8, 2025 07:55
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Revisions

  1. wareya revised this gist Apr 13, 2024. No changes.
  2. wareya revised this gist Mar 3, 2024. 1 changed file with 4 additions and 0 deletions.
    4 changes: 4 additions & 0 deletions spi_recorder.ino
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    Original file line number Diff line number Diff line change
    @@ -1,5 +1,9 @@
    // wiring example for ripping a PMW3360 SROM: https://i.imgur.com/EspAlvz.jpeg
    // set the board to 240mhz or higher for best results (WARNING: higher than 240mhz only works with USB if you overvolt the MCU)
    // this implements reading SPI mode 3. if you want a different mode, you need to edit these two lines:
    // uint32_t clockval = (1 << pin_clock);
    // if (newclock && !clockval && buff_i < buffsize)


    #include <pico/stdlib.h>

  3. wareya revised this gist Mar 3, 2024. 1 changed file with 1 addition and 0 deletions.
    1 change: 1 addition & 0 deletions spi_recorder.ino
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    Original file line number Diff line number Diff line change
    @@ -1,4 +1,5 @@
    // wiring example for ripping a PMW3360 SROM: https://i.imgur.com/EspAlvz.jpeg
    // set the board to 240mhz or higher for best results (WARNING: higher than 240mhz only works with USB if you overvolt the MCU)

    #include <pico/stdlib.h>

  4. wareya created this gist Mar 3, 2024.
    70 changes: 70 additions & 0 deletions spi_recorder.ino
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    @@ -0,0 +1,70 @@
    // wiring example for ripping a PMW3360 SROM: https://i.imgur.com/EspAlvz.jpeg

    #include <pico/stdlib.h>

    #define buffsize 50000
    #define pin_ncs 19
    #define pin_dat1 17
    #define pin_dat2 18
    #define pin_clock 16

    uint8_t buff[buffsize];

    void setup()
    {
    Serial.begin(2000000);

    pinMode(pin_ncs, INPUT);
    pinMode(pin_dat1, INPUT);
    pinMode(pin_dat2, INPUT);
    pinMode(pin_clock, INPUT);

    delay(3000);
    Serial.println("booted");

    memset(buff, 0, buffsize);
    }

    void loop()
    {
    uint32_t pins = gpio_get_all();
    if (!(pins & (1 << pin_ncs)))
    {
    uint32_t buff_i = 0;
    uint32_t clockval = (1 << pin_clock);
    uint32_t start = micros();
    uint32_t n = 0;
    uint8_t bit = 0;

    noInterrupts();
    do
    {
    n++;
    uint32_t newclock = pins & (1 << pin_clock);
    if (newclock && !clockval && buff_i < buffsize)
    {
    buff[buff_i] |= (!!(pins & (1 << pin_dat1))) << (7-bit);
    bit += 1;
    if (bit == 8)
    {
    bit = 0;
    buff_i += 1;
    }
    }
    clockval = newclock;
    pins = gpio_get_all();
    } while (!(pins & (1 << pin_ncs)));
    interrupts();

    uint32_t end = micros();

    if (buff_i > 100)
    {
    Serial.printf("len: %d -- micros %d - khz %d - khz limit %d\n", buff_i, end-start, buff_i*8*1000/(end-start), n*1000/(end-start)/2);
    for (size_t i = 0; i < buff_i; i++)
    Serial.printf("%02X, ", buff[i]);
    Serial.println("");
    }
    memset(buff, 0, buffsize);
    }
    }