alexandClaude Sonnet 5
6d835bc44c
Based on https://github.com/tslabs/zx-evo/tree/master/pentevo/esp32, extended with an SMB2/3 server that exposes the ZX Evolution's real SD card as a network share (browse/download/upload/delete), plus assorted stability and protocol-correctness fixes in vfs_bridge.cpp and the vendored libsmb2 - see firmware/README.md for the detailed changelog and current status. Also adds: - firmware/: ready-to-flash compiled binaries + flashing instructions - hardware/: adapter board connection diagram, PCB photo, and Gerber files - src/third_party/libsmb2: vendored from sahlberg/libsmb2 (LGPL-2.1, see its own COPYING/LICENCE files), de-submoduled to a plain snapshot with local patches applied directly Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
// Standalone diagnostic firmware - NOT part of the real esp-spi project.
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// Purpose: bypass the SPI slave peripheral entirely and watch the raw GPIO
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// pins (plain digital input, interrupt on every edge) that our real
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// firmware's spi_slave.cpp configures for SPI slave use on ESP32-S3:
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// CS=GPIO10, SCLK=GPIO12, MOSI=GPIO13, MISO=GPIO11
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// Logs every CS/SCLK edge with a microsecond timestamp and the
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// MOSI/MISO/CS level sampled at that instant, so a real transaction
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// attempt from the CH341A bridge can be visually reconstructed from the
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// console log - answers directly whether the ESP32 sees anything at all
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// on these pins, and if so, whether it looks like a sane SPI waveform
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// (CS low, some number of SCLK edges, CS high) or not.
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/queue.h"
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#include "driver/gpio.h"
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#include "esp_timer.h"
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#define PIN_CS 10
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#define PIN_SCLK 12
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#define PIN_MOSI 13
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#define PIN_MISO 11
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typedef struct
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{
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int64_t us;
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uint8_t pin; // which pin's edge triggered this event (PIN_CS or PIN_SCLK)
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uint8_t level; // level that pin transitioned TO
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uint8_t cs;
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uint8_t sclk;
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uint8_t mosi;
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uint8_t miso;
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} event_t;
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#define EVQ_LEN 4096
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static QueueHandle_t evq;
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static void IRAM_ATTR gpio_isr(void *arg)
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{
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uint32_t pin = (uint32_t)(uintptr_t)arg;
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event_t ev;
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ev.us = esp_timer_get_time();
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ev.pin = (uint8_t)pin;
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ev.level = (uint8_t)gpio_get_level((gpio_num_t)pin);
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ev.cs = (uint8_t)gpio_get_level(PIN_CS);
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ev.sclk = (uint8_t)gpio_get_level(PIN_SCLK);
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ev.mosi = (uint8_t)gpio_get_level(PIN_MOSI);
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ev.miso = (uint8_t)gpio_get_level(PIN_MISO);
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BaseType_t hpw = pdFALSE;
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xQueueSendFromISR(evq, &ev, &hpw);
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if (hpw) portYIELD_FROM_ISR();
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}
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void app_main(void)
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{
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printf("\n\n=== spi_gpio_probe starting ===\n");
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printf("Pins: CS=GPIO%d SCLK=GPIO%d MOSI=GPIO%d MISO=GPIO%d\n", PIN_CS, PIN_SCLK, PIN_MOSI, PIN_MISO);
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printf("Watching CS + SCLK edges only (plain digital input, no SPI peripheral involved).\n\n");
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evq = xQueueCreate(EVQ_LEN, sizeof(event_t));
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gpio_config_t io = { 0 };
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io.pin_bit_mask = (1ULL << PIN_CS) | (1ULL << PIN_SCLK) | (1ULL << PIN_MOSI) | (1ULL << PIN_MISO);
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io.mode = GPIO_MODE_INPUT;
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io.pull_up_en = GPIO_PULLUP_DISABLE;
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io.pull_down_en = GPIO_PULLDOWN_DISABLE;
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io.intr_type = GPIO_INTR_ANYEDGE;
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gpio_config(&io);
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gpio_install_isr_service(0);
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gpio_isr_handler_add((gpio_num_t)PIN_CS, gpio_isr, (void*)(uintptr_t)PIN_CS);
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gpio_isr_handler_add((gpio_num_t)PIN_SCLK, gpio_isr, (void*)(uintptr_t)PIN_SCLK);
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printf("Idle levels right now: CS=%d SCLK=%d MOSI=%d MISO=%d\n\n",
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gpio_get_level(PIN_CS), gpio_get_level(PIN_SCLK),
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gpio_get_level(PIN_MOSI), gpio_get_level(PIN_MISO));
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int64_t last_us = 0;
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unsigned long total_events = 0;
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unsigned long cs_high_count = 0;
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for (;;)
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{
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event_t ev;
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if (xQueueReceive(evq, &ev, pdMS_TO_TICKS(3000)))
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{
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const char *pin_name = (ev.pin == PIN_CS) ? "CS " : "SCLK";
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long long delta = last_us ? (long long)(ev.us - last_us) : 0;
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printf("[t=%10lld us d=%6lld us] %s -> %d | CS=%d SCLK=%d MOSI=%d MISO=%d\n",
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(long long)ev.us, delta, pin_name, ev.level,
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ev.cs, ev.sclk, ev.mosi, ev.miso);
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last_us = ev.us;
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total_events++;
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if (ev.pin == PIN_CS && ev.level == 1) cs_high_count++;
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}
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else
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{
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printf("--- idle (no CS/SCLK edges in last 3s) --- total_events=%lu cs_high_transitions=%lu\n",
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total_events, cs_high_count);
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}
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}
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}
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