f7fffae8aa
Change all the Intel and Wind River code license from BSD-3 to Apache 2. Change-Id: Id8be2c1c161a06ea8a0b9f38e17660e11dbb384b Signed-off-by: Javier B Perez Hernandez <javier.b.perez.hernandez@linux.intel.com> Signed-off-by: Anas Nashif <anas.nashif@intel.com> Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/** @file
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* @brief Simple UART driver
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*
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* A simple UART driver allowing application to handle all aspects of received
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* protocol data.
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*/
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <arch/cpu.h>
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#include <board.h>
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#include <drivers/uart.h>
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#include <simple/uart.h>
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#include <misc/printk.h>
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#define UART (uart_devs[CONFIG_UART_SIMPLE_INDEX])
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static uint8_t *recv_buf;
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static size_t recv_buf_len;
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static uart_simple_recv_cb app_cb;
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static size_t recv_off;
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void uart_simple_isr(void *unused)
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{
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ARG_UNUSED(unused);
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while (uart_irq_update(UART) && uart_irq_is_pending(UART)) {
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int rx;
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if (!uart_irq_rx_ready(UART)) {
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continue;
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}
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rx = uart_fifo_read(UART, recv_buf + recv_off,
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recv_buf_len - recv_off);
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if (!rx) {
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continue;
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}
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/* Call application callback with received data. Application
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* may provide new buffer or alter data offset.
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*/
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recv_off += rx;
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recv_buf = app_cb(recv_buf, &recv_off);
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}
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}
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int uart_simple_send(const uint8_t *data, int len)
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{
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return uart_fifo_fill(UART, data, len);
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}
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IRQ_CONNECT_STATIC(uart_simple, CONFIG_UART_SIMPLE_IRQ,
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CONFIG_UART_SIMPLE_INT_PRI, uart_simple_isr, 0);
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static void uart_simple_setup(struct device *uart, struct uart_init_info *info)
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{
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uart_init(uart, info);
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uart_irq_rx_disable(uart);
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uart_irq_tx_disable(uart);
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IRQ_CONFIG(uart_simple, uart_irq_get(uart));
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irq_enable(uart_irq_get(uart));
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/* Drain the fifo */
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while (uart_irq_rx_ready(uart)) {
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unsigned char c;
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uart_fifo_read(uart, &c, 1);
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}
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uart_irq_rx_enable(uart);
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}
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void uart_simple_register(uint8_t *buf, size_t len, uart_simple_recv_cb cb)
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{
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struct uart_init_info info = {
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.options = 0,
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.sys_clk_freq = CONFIG_UART_SIMPLE_FREQ,
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.baud_rate = CONFIG_UART_SIMPLE_BAUDRATE,
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.irq_pri = CONFIG_UART_SIMPLE_INT_PRI,
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};
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recv_buf = buf;
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recv_buf_len = len;
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app_cb = cb;
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uart_simple_setup(UART, &info);
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}
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