forked from Imagelibrary/rtems
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
/*
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* This file implements simple console IO via JTAG UART.
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*/
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/*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* Altera-specific code is
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* COPYRIGHT (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#define NO_BSP_INIT
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#include <bsp.h>
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#include <bsp/console-polled.h>
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#include <rtems/libio.h>
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/* #define JTAG_UART_REGS \
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((altera_avalon_jtag_uart_regs*)NIOS2_IO_BASE(JTAG_UART_BASE)) */
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/* is_character_ready
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*
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* If a character is available, this routine reads it and stores
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* it in reads the character and stores
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*/
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static bool is_character_ready(
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char *ch
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)
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{
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altera_avalon_jtag_uart_regs *ajur = NIOS2_IO_BASE(JTAG_UART_BASE);
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unsigned int data = ajur->data;
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if (data & ALTERA_AVALON_JTAG_UART_DATA_RVALID_MSK) {
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*ch = (data & ALTERA_AVALON_JTAG_UART_DATA_DATA_MSK)
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>> ALTERA_AVALON_JTAG_UART_DATA_DATA_OFST;
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return true;
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}
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return false;
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}
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void console_initialize_hardware(void)
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{
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}
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/*
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* This routine reads a character from the SOURCE.
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*/
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int console_inbyte_nonblocking(
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int port
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)
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{
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char ch;
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/*
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* Wait until a character is available.
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*/
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if (is_character_ready(&ch))
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return ch;
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return -1;
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}
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/*
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* This routine transmits a character out the SOURCE.
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*/
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void console_outbyte_polled(
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int port,
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char ch
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)
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{
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altera_avalon_jtag_uart_regs *ajur = NIOS2_IO_BASE(JTAG_UART_BASE);
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/*
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* Wait for the transmitter to be ready.
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* Check for flow control requests and process.
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* Then output the character.
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*/
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while ((ajur->control & ALTERA_AVALON_JTAG_UART_CONTROL_WSPACE_MSK) == 0);
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ajur->data = ch;
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}
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/*
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* To support printk
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*/
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#include <rtems/bspIo.h>
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static void ISS_output_char(char c) { console_outbyte_polled( 0, c ); }
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BSP_output_char_function_type BSP_output_char = ISS_output_char;
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BSP_polling_getchar_function_type BSP_poll_char = NULL;
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