configs/makerlisp: Add VGA initialization logic.
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@ -5,4 +5,11 @@
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if ARCH_BOARD_MAKERLISP
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if ARCH_BOARD_MAKERLISP
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config MAKERLISP_VGA
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bool "VGA Controller attached?"
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default n
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---help---
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Select this option if you have an I/O Controller and a VGA vide card
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connected.
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endif # ARCH_BOARD_MAKERLISP
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endif # ARCH_BOARD_MAKERLISP
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@ -160,8 +160,9 @@ Serial Keyboard and VGA Display
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expansion board GPIO PB1.
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expansion board GPIO PB1.
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e. Transmit 'TX' pin on VGA board to USB keyboard controller 'R'
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e. Transmit 'TX' pin on VGA board to USB keyboard controller 'R'
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TBD: Beyond the simple UART interface, what additional support for the
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To use the VGA display controller with stdout and stderr, you also
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ready pin 'C' is required.
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need to selection CONFIG_MAKERLISP_VGA=y in your configuration. This
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enables a required VGA initialization sequence.
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2. USB keyboard controller (UART0 RX)
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2. USB keyboard controller (UART0 RX)
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@ -289,7 +290,9 @@ Configuration Subdirectories
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The default baud setting is 57600N1.
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The default baud setting is 57600N1.
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TBD: Although the UART0 is the same with the VGA and Keyboard
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To use the VGA display controller with stdout and stderr, you also
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controller boards, this configuration may not compatible with
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need to selection CONFIG_MAKERLISP_VGA=y in your configuration. This
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those accessories. Those may require additional support for
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enables a required VGA initialization sequence.
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the VGA data ready pin. A BAUD mismatch is also likely.
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TBD: What is the UART configuration when used with the VGA and
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Keyboard controllers?
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@ -68,11 +68,10 @@ int ez80_bringup(void)
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#ifdef CONFIG_FS_PROCFS
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#ifdef CONFIG_FS_PROCFS
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/* Mount the procfs file system */
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/* Mount the procfs file system */
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ret = mount(NULL, STM32_PROCFS_MOUNTPOINT, "procfs", 0, NULL);
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ret = mount(NULL, "/proc", "procfs", 0, NULL);
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if (ret < 0)
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if (ret < 0)
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{
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{
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serr("ERROR: Failed to mount procfs at %s: %d\n",
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serr("ERROR: Failed to mount procfs at /proc: %d\n", ret);
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STM32_PROCFS_MOUNTPOINT, ret);
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}
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}
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#endif
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#endif
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@ -4,7 +4,8 @@
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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*
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* Based upon sample code included with the Zilog ZDS-II toolchain.
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* Parts of this file are based on MakerLisp sample code by Luther Johnson
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* which has a compatible MIT license
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* modification, are permitted provided that the following conditions
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@ -47,6 +48,7 @@
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#include <arch/chip/io.h>
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#include <arch/chip/io.h>
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#include "chip.h"
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#include "chip.h"
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#include "up_internal.h"
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#include "makerlisp.h"
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#include "makerlisp.h"
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/****************************************************************************
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/****************************************************************************
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@ -55,6 +57,66 @@
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bool g_ebpresent = false; /* True: I/O Expansion board is present */
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bool g_ebpresent = false; /* True: I/O Expansion board is present */
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define VGA_MAX_DELAY 2000000
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ez80_vga_initialize
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*
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* Description:
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* If CONFIG_MAKERLISP_VGA is defined and the I/O controller is attached,
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* then initialize the VGA interface.
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*
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****************************************************************************/
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#ifdef CONFIG_MAKERLISP_VGA
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static void ez80_vga_initialize(void)
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{
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/* I/O Expansion board attached? */
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if (g_ebpresent)
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{
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bool vgapresent = false;
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int delay;
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/* Wait for VGA ready */
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for (delay = 0; delay < VGA_MAX_DELAY; delay++)
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{
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if *(inp(EZ80_PB_DR) & EZ80_GPIOD1) != 0)
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{
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vgapresent = true;
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break;
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}
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}
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/* Is VGA ready (and, hence, present)? */
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if (vgapresent)
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{
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/* Yes.. set newline mode, graphic attributes:
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*
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* \033 = ESCAPE character
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* Assumption: VGA is on the console UART.
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*/
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up_puts("\033[20h\033[0m");
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/* Clear, home cursor, beep */
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up_puts("\033[2J\033[H\a");
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}
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}
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}
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#endif
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/****************************************************************************
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/****************************************************************************
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* Public Functions
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* Public Functions
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****************************************************************************/
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****************************************************************************/
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@ -136,6 +198,15 @@ void ez80_lowinit(void)
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/* Wait for the SD card to power up */
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/* Wait for the SD card to power up */
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up_udelay(750);
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up_udelay(750);
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#ifdef CONFIG_MAKERLISP_VGA
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/* Initialize the VGA interface. We want to do this as early as possible
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* in the boot-up sequence. Debug output prior initializing VGA will be
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* lost.
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*/
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ez80_vga_initialize();
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#endif
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}
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}
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/****************************************************************************
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/****************************************************************************
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