Implement JTAG-UART input

1 files changed, 14 insertions, 3 deletions

diff --git a/tb/jtag_uart.hpp b/tb/jtag_uart.hpp
index 6db50f8..3c378c3 100644
--- a/tb/jtag_uart.hpp
+++ b/tb/jtag_uart.hpp
@@ -11,14 +11,25 @@ namespace taller::avalon
 	{
 		public:
 			jtag_uart(std::uint32_t base) noexcept;
+			~jtag_uart() noexcept;
+
+			void tick() noexcept;
 
 			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:
-			bool ctrl_re = false;
-			bool ctrl_we = false;
-			bool ctrl_ac = true;
+			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];
 	};
 }