SWD Driver for ESP32

A dirty port of ARM DAPLink

For ESP32-S2/S3 only, currently tested on ESP32-S2

Usage

target is a STM32L031K6, writing 8KB of 0x5a to RAM:

#include <stdio.h>
#include <string.h>
#include <swd_host.h>
#include <esp_log.h>
#include <esp_timer.h>

void app_main(void)
{
    static const char *TAG = "main";
    ESP_LOGI(TAG, "Lay hou from DAPLink!");

    swd_init_debug();

    uint32_t idcode = 0;
    uint8_t ret = swd_read_idcode(&idcode);

    ESP_LOGI(TAG, "IDCode readout is: 0x%x, ret: %u", idcode, ret);

    uint8_t *buf = malloc(8192);
    memset(buf, 0x5a, 8192);

    int64_t start_ts = esp_timer_get_time();
    ret = swd_write_memory(0x20000000, buf, 8192);
    ESP_LOGI(TAG, "Wrote 8KB used %lld us, ret %u", esp_timer_get_time() - start_ts, ret);
}

Log output:

I (495) main: Lay hou from DAPLink!
I (505) main: IDCode readout is: 0xbc11477, ret: 1
I (535) main: Wrote 8KB used 24842 us, ret 1

License

MIT