fixes TGCP environment

env/TGCP/init.c

@@ -110,12 +110,13 @@ void _fini()
 }
 
 int is_uart_ready(int uart_id){
-    return 1;
+    return !UART0_REG(UART_REG_TXFIFO) & 0x80000000;
 }
 int try_write_uart_char(int uart_id, char c){
-    *((char*)0x10000000) = c;
+    if(UART0_REG(UART_REG_TXFIFO) & 0x80000000) return 0;
+    UART0_REG(UART_REG_TXFIFO) = c;
     return 1;
 }
 void write_uart_char(int uart_id, char c){
-    *((char*)0x10000000) = c;
+    UART0_REG(UART_REG_TXFIFO) = c;
 }

env/TGCP/platform.h

@@ -7,7 +7,18 @@
 #define MCAUSE_INT         0x80000000
 #define MCAUSE_CAUSE       0x7FFFFFFF
 
-#include "bits.h"
+#define UART0_BASE_ADDR 0xffff0000ULL
+
+#define UART_REG_TXFIFO         0x00
+#define UART_REG_RXFIFO         0x04
+#define UART_REG_TXCTRL         0x08
+#define UART_REG_RXCTRL         0x0c
+#define UART_REG_IE             0x10
+#define UART_REG_IP             0x14
+#define UART_REG_DIV            0x18
+#define UART_TXEN               0x1
+
+#define UART0_REG(ADDR) *((volatile uint32_t*) (UART0_BASE_ADDR + ADDR))
 /****************************************************************************
  * Platform definitions
  *****************************************************************************/

libwrap/sys/write.c

@@ -22,8 +22,6 @@ ssize_t __wrap_write(int fd, const void* ptr, size_t len)
             }
 #elif defined(BOARD_iss)
             *((uint32_t*) 0xFFFF0000) = current[jj];
-#elif defined(BOARD_TGCP)
-            //TODO: implement
 #else
             while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
             UART0_REG(UART_REG_TXFIFO) = current[jj];