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发表于 2017-8-22 19:59:38
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显示全部楼层
根据楼主的思路，写了段代码，确实可以读出bootloader 
- //gcc usb.c `pkg-config libusb-1.0 --libs --cflags` -o usb
- #include <errno.h>
- #include <signal.h>
- #include <string.h>
- #include <stdio.h>
- #include <stdbool.h>
- #include <stdlib.h>
- #include <stdint.h>
- #include <unistd.h>
- #include <sys/select.h>
- #include <termios.h>
- #include <libusb.h>
- #define EP_DATA_IN (0x3|LIBUSB_ENDPOINT_IN)
- #define EP_DATA_OUT (0x3|LIBUSB_ENDPOINT_OUT)
- static struct libusb_device_handle *devh = NULL;
- static struct libusb_transfer *recv_bulk_transfer = NULL;
- bool jlinkSendCommand( void const* commandBuffer, uint32_t commandLength, void* resultBuffer, uint32_t resultHeaderLength)
- {
- int transferred, r;
- r = libusb_bulk_transfer(devh, EP_DATA_OUT, commandBuffer, commandLength, &transferred, 200);
- // if(!WriteFile( commandBuffer, commandLength, nullptr, nullptr))
- // return false;
- if(!resultHeaderLength)
- return true;
- // return !!ReadFile( resultBuffer, resultHeaderLength, nullptr, nullptr);
- return 0==libusb_bulk_transfer(devh, EP_DATA_IN, resultBuffer, resultHeaderLength, &transferred, 200);
- }
- bool jlinkContinueReadResult(void* resultBuffer, uint32_t resultLength)
- {
- int transferred, r;
- // return !!ReadFile( resultBuffer, resultLength, nullptr, nullptr);
- return 0==libusb_bulk_transfer(devh, EP_DATA_IN, resultBuffer, resultLength, &transferred, 200);
- }
- bool jlinkCommandReadFirmwareVersion(void* dataBuffer)
- {
- uint8_t commandBuffer[1] = {0x01};
- uint16_t leftLength = 0;
- if(!jlinkSendCommand( commandBuffer, sizeof(commandBuffer), &leftLength, sizeof(leftLength)))
- return false;
- return jlinkContinueReadResult( dataBuffer, leftLength);
- }
- bool jlinkCommandReadEmulatorMemory(uint32_t address, uint32_t length, void* dataBuffer)
- {
- uint8_t commandBuffer[9] =
- {
- 0xfe,
- (uint8_t)(address), (uint8_t)(address >> 8), (uint8_t)(address >> 16), (uint8_t)(address >> 24),
- (uint8_t)(length), (uint8_t)(length >> 8), (uint8_t)(length >> 16), (uint8_t)(length >> 24),
- };
- return jlinkSendCommand( commandBuffer, sizeof(commandBuffer), dataBuffer, length);
- }
- int main(int argc, char **argv)
- {
- int r = 1;
- r = libusb_init(NULL);
- if (r < 0) {
- fprintf(stderr, "failed to initialise libusb\n");
- exit(1);
- }
- devh = libusb_open_device_with_vid_pid(NULL, 0x1366, 0x0105);
- if (devh == NULL) {
- fprintf(stderr, "Could not find/open device\n");
- goto out;
- }
- r = libusb_claim_interface(devh, 2);
- if (r < 0) {
- fprintf(stderr, "usb_claim_interface error %d\n", r);
- goto out;
- }
- printf("claimed interface\n");
- char version[128];
- bool ret = jlinkCommandReadFirmwareVersion(version);
- printf("ver[%d] %s\n", ret, version);
- uint8_t bootloader[0xb700] = {0};
- ret = jlinkCommandReadEmulatorMemory( 0x08000000, sizeof(bootloader), bootloader);
- printf("read[%d]\n", ret);
- FILE* fBld = fopen("bootloader.bin", "wb");
- fwrite(bootloader, 1, sizeof(bootloader), fBld);
- fclose(fBld);
- out_release:
- libusb_release_interface(devh, 2);
- out:
- libusb_close(devh);
- libusb_exit(NULL);
- return r >= 0 ? r : -r;
- }
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楼主: thxlp
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