dd20c1355b
Gregory Nutt is the copyright holder for those files and he has submitted the SGA as a result we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
140 lines
4.6 KiB
C
140 lines
4.6 KiB
C
/****************************************************************************
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* apps/graphics/ft80x/ft80x_coproc.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/lcd/ft80x.h>
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#include "graphics/ft80x.h"
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#include "ft80x.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define HALF_SECOND (500 * 1000) /* 500 milliseconds (units = microseconds) */
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#define FIVE_SECONDS (5 * 2) /* 5 seconds (units = half seconds) */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ft80x_coproc_send
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*
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* Description:
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* Send commands to the co-processor via the CMD RAM FIFO. This function
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* will not return until the command has been consumed by the co-processor.
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*
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* NOTE: This command is not appropriate use while a display is being
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* formed. It is will mess up the CMD RAM FIFO offsets managed by the
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* display list logic.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* cmds - A list of 32-bit commands to be sent.
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* ncmds - The number of commands in the list.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_coproc_send(int fd, FAR const uint32_t *cmds, size_t ncmds)
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{
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return ft80x_ramcmd_append(fd, cmds, ncmds << 2);
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}
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/****************************************************************************
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* Name: ft80x_coproc_waitlogo
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*
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* Description:
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* Wait for the logo animation to complete. The logo command causes the
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* co-processor engine to play back a short animation of the FTDI logo.
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* During logo playback the MCU should not access any FT800 resources.
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* After 2.5 seconds have elapsed, the co-processor engine writes zero to
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* REG_CMD_READ and REG_CMD_WRITE, and starts waiting for commands. After
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* this command is complete, the MCU shall write the next command to the
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* starting address of RAM_CMD.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_coproc_waitlogo(int fd)
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{
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uint32_t regs[2];
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uint16_t head;
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uint16_t tail;
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int elapsed;
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int ret;
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/* Loop until both REG_CMD_READ and REG_CMD_WRITE are zero or until 5
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* seconds elapses.
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*/
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for (elapsed = 0; elapsed < FIVE_SECONDS; elapsed++)
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{
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/* Read both the FT80X_REG_CMD_WRITE and FT80X_REG_CMD_READ registers. */
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ret = ft80x_getregs(fd, FT80X_REG_CMD_READ, 2, regs);
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if (ret < 0)
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{
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ft80x_err("ERROR: ft80x_getregs failed: %d\n", ret);
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return ret;
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}
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/* Check if both have been reset to zero. */
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head = regs[1] & FT80X_CMDFIFO_MASK;
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tail = regs[0] & FT80X_CMDFIFO_MASK;
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if (head == 0 && tail == 0)
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{
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/* The animation is done! */
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return OK;
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}
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/* Wait for a half of a second */
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usleep(HALF_SECOND);
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}
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ft80x_err("ERROR: Timed out! Last head/tail = %u/%u\n", head, tail);
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return -ETIMEDOUT;
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}
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