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#ifndef TALLER_JTAG_UART_HPP
#define TALLER_JTAG_UART_HPP
#include <cstdint>
#include "avalon.hpp"
namespace taller::avalon
{
class jtag_uart : public slave
{
public:
jtag_uart(std::uint32_t base) noexcept;
~jtag_uart() noexcept;
virtual void tick() noexcept final override;
inline virtual void bail() noexcept final override
{
release();
}
virtual bool read(std::uint32_t addr, std::uint32_t &data) noexcept final override;
virtual bool write(std::uint32_t addr, std::uint32_t data, unsigned byte_enable) noexcept final override;
void takeover() noexcept;
void release() noexcept;
private:
unsigned countdown = 0;
unsigned rx_avail = 0;
unsigned rx_next = 0;
bool ctrl_re = false;
bool ctrl_we = false;
bool ctrl_ac = true;
bool took_over = false;
std::uint8_t rx[64];
};
}
#endif
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