05c6d7c7b9
PWM driver for multiple peripherals supplied in gateware. Only single channel frequency and duty cycle control is implemented. Pulse counting and multichannel features are not currently feasible. Additions also include a new board configuration for arty-a7 which enables the PWM driver and example application.
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/****************************************************************************
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* boards/risc-v/litex/arty_a7/src/litex_bringup.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 <stdbool.h>
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#include <stdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/board.h>
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#include <nuttx/fs/fs.h>
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#include "litex.h"
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#include "arty_a7.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: litex_bringup
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****************************************************************************/
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int litex_bringup(void)
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{
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int ret = OK;
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#ifdef CONFIG_FS_PROCFS
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/* Mount the procfs file system */
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ret = nx_mount(NULL, LITEX_PROCFS_MOUNTPOINT, "procfs", 0, NULL);
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if (ret < 0)
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{
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syslog(LOG_ERR, "failed to mount procfs at %s %d\n",
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LITEX_PROCFS_MOUNTPOINT, ret);
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}
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#endif
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#ifdef CONFIG_FS_AUTOMOUNTER
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/* Configure uSD automounter */
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ret = litex_automount_initialize();
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: litex_automount_initialize() failed: %d\n",
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ret);
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}
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#endif
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#ifdef CONFIG_LITEX_SDIO
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/* Initialize the SDIO block driver */
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ret = litex_sdio_initialize();
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if (ret != OK)
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{
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syslog(LOG_ERR, "litex_sdio_initialize() failed %d\n", ret);
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return ret;
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}
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/* If automount not configured, force a mount point.
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* Assumes the card is always present.
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*/
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#ifndef CONFIG_FS_AUTOMOUNTER
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#ifdef CONFIG_LITEX_SDIO_MOUNT
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/* Mount the volume on SDMMC0 */
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ret = nx_mount(CONFIG_LITEX_SDIO_MOUNT_BLKDEV,
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CONFIG_LITEX_SDIO_MOUNT_MOUNTPOINT,
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CONFIG_LITEX_SDIO_MOUNT_FSTYPE,
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0, NULL);
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if (ret != OK)
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{
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syslog(LOG_ERR, "ERROR: Failed to mount %s: %d\n",
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CONFIG_LITEX_SDIO_MOUNT_MOUNTPOINT, ret);
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}
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#endif /* CONFIG_LITEX_SDIO_MOUNT */
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#endif
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#endif /* CONFIG_LITEX_SDIO */
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#ifdef CONFIG_LITEX_PWM
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ret = litex_pwm_setup();
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if (ret != OK)
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{
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syslog(LOG_ERR, "ERROR: Failed to setup PWM driver \n");
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}
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#endif /* CONFIG_LITEX_PWM */
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return ret;
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}
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