46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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/*
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* Copyright (C) 2023 Alexey Starikovskiy <aystarik@gmail.com>
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*/
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#pragma once
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#include <libusb.h>
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#include "jtagInterface.hpp"
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constexpr unsigned MAX_BUFFER = 512;
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class CH347Jtag : public JtagInterface {
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public:
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CH347Jtag(uint32_t clkHZ, int8_t verbose);
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virtual ~CH347Jtag();
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int setClkFreq(uint32_t clkHZ) override { return _setClkFreq(clkHZ); };
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int _setClkFreq(uint32_t clkHZ);
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/* TMS */
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int writeTMS(const uint8_t *tms, uint32_t len, bool flush_buffer, const uint8_t tdi = 1) override;
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/* TDI */
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int writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end) override;
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/* clk */
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int toggleClk(uint8_t tms, uint8_t tdo, uint32_t clk_len) override;
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int get_buffer_size() override {return get_obuf_length();}
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bool isFull() override {return get_obuf_length() == 0;}
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int flush() override {return usb_xfer(0, 0, 0, false);}
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private:
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bool _verbose;
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int setClk(const uint8_t &factor);
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libusb_device_handle *dev_handle;
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libusb_context *usb_ctx;
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struct libusb_transfer *wtrans, *rtrans;
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uint8_t ibuf[MAX_BUFFER];
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uint8_t _obuf[MAX_BUFFER];
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uint8_t *obuf;
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int get_obuf_length() const {return MAX_BUFFER - (obuf - _obuf);}
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int usb_xfer(unsigned wlen, unsigned rlen, unsigned *actual, bool defer);
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};
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