122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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/*
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* Copyright (C) 2020 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
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*/
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#ifndef SRC_FTDIJTAGMPSSE_HPP_
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#define SRC_FTDIJTAGMPSSE_HPP_
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#include <ftdi.h>
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#include <cstdint>
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#include <iostream>
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#include <string>
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#include <vector>
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#include "cable.hpp"
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#include "ftdipp_mpsse.hpp"
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#include "jtagInterface.hpp"
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/*!
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* \file FtdiJtagMPSSE.hpp
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* \class FtdiJtagMPSSE
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* \brief concrete class between jtag implementation and FTDI capable bitbang mode
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* \author Gwenhael Goavec-Merou
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*/
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class FtdiJtagMPSSE : public JtagInterface, public FTDIpp_MPSSE {
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public:
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FtdiJtagMPSSE(const cable_t &cable, const std::string &dev,
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const std::string &serial, uint32_t clkHZ, bool invert_read_edge,
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int8_t verbose = 0);
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virtual ~FtdiJtagMPSSE();
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int setClkFreq(uint32_t clkHZ) override;
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uint32_t getClkFreq() override {return FTDIpp_MPSSE::getClkFreq();}
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/*!
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* Return constant to describe if read is on rising or falling TCK edge
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*/
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tck_edge_t getReadEdge() override {
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return _read_mode == MPSSE_READ_NEG ? FALLING_EDGE : RISING_EDGE;
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}
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/*!
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* configure TCK edge used for read
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*/
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void setReadEdge(tck_edge_t rd_edge) override {
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_read_mode = rd_edge == FALLING_EDGE ? MPSSE_READ_NEG : 0;
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}
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/*!
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* Return constant to describe if write is on rising or falling TCK edge
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*/
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tck_edge_t getWriteEdge() override {
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return _write_mode == MPSSE_WRITE_NEG ? FALLING_EDGE : RISING_EDGE;
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}
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/*!
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* configure TCK edge used for write
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*/
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void setWriteEdge(tck_edge_t wr_edge) override {
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_write_mode = wr_edge == FALLING_EDGE ? MPSSE_WRITE_NEG : 0;
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}
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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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/* clock */
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int toggleClk(uint8_t tms, uint8_t tdi, uint32_t clk_len) 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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/*!
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* \brief send TMD and TDI and receive tdo bits;
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* \param tms: array of TMS values (used to write)
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* \param tdi: array of TDI values (used to write)
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* \param tdo: array of TDO values (used when read)
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* \param len: number of bit to send/receive
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* \return true with full buffers are sent, false otherwise
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*/
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bool writeTMSTDI(const uint8_t *tms, const uint8_t *tdi, uint8_t *tdo,
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uint32_t len) override;
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/*!
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* \brief return internal buffer size (in byte).
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* \return _buffer_size -3 for mpsse cmd + size, -1 for potential SEND_IMMEDIATE
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*/
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int get_buffer_size() override { return _buffer_size-3; }
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bool isFull() override { return false;}
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int flush() override;
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private:
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void init_internal(const mpsse_bit_config &cable);
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/* writeTMSTDI specifics */
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/*!
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* \brief try to append tms buffer, flush content if > 6
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* \param buffer: current tms buffer
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* \param bit: bit to append
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* \param offset: bits already stored
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* \param tdo: buffer used when reading after flush
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* \param len: length
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* \return < 0 if transaction fails, offset + 1 when append and 0 when flush
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*/
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int32_t update_tms_buff(uint8_t *buffer, uint8_t bit,
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uint32_t offset, uint8_t tdi, uint8_t *tdo, bool end = false);
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uint32_t update_tdo_buff(uint8_t *buffer, uint8_t *tdo, uint32_t len);
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/*!
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* \brief configure read and write edge (pos or neg), with freq < 15MHz
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* neg is used for write and pos to sample. with freq >= 15MHz
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* pos is used for write and neg to sample
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*/
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void config_edge();
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bool _ch552WA; /* avoid errors with SiPeed tangNano */
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bool _cmd8EWA; /* avoid errors with Sipeed FT2232H emulation */
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uint8_t _write_mode; /**< write edge configuration */
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uint8_t _read_mode; /**< read edge configuration */
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bool _invert_read_edge; /**< read edge selection (false: pos, true: neg) */
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/* writeTMSTDI specifics */
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uint32_t _tdo_pos;
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uint8_t _curr_tdi;
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uint8_t _curr_tms;
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};
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#endif // SRC_FTDIJTAGMPSSE_HPP_
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