107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
/** @file
|
|
* @brief Pipe UART driver
|
|
*
|
|
* A pipe UART driver allowing application to handle all aspects of received
|
|
* protocol data.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <logging/log.h>
|
|
LOG_MODULE_REGISTER(uart_pipe, CONFIG_UART_CONSOLE_LOG_LEVEL);
|
|
|
|
#include <kernel.h>
|
|
|
|
#include <drivers/uart.h>
|
|
|
|
#include <drivers/console/uart_pipe.h>
|
|
#include <sys/printk.h>
|
|
|
|
static struct device *uart_pipe_dev;
|
|
|
|
static uint8_t *recv_buf;
|
|
static size_t recv_buf_len;
|
|
static uart_pipe_recv_cb app_cb;
|
|
static size_t recv_off;
|
|
|
|
static void uart_pipe_rx(struct device *dev)
|
|
{
|
|
/* As per the API, the interrupt may be an edge so keep
|
|
* reading from the FIFO until it's empty.
|
|
*/
|
|
for (;;) {
|
|
int avail = recv_buf_len - recv_off;
|
|
int got;
|
|
|
|
got = uart_fifo_read(uart_pipe_dev, recv_buf + recv_off, avail);
|
|
if (got <= 0) {
|
|
break;
|
|
}
|
|
|
|
LOG_HEXDUMP_DBG(recv_buf + recv_off, got, "RX");
|
|
|
|
/*
|
|
* Call application callback with received data. Application
|
|
* may provide new buffer or alter data offset.
|
|
*/
|
|
recv_off += got;
|
|
recv_buf = app_cb(recv_buf, &recv_off);
|
|
}
|
|
}
|
|
|
|
static void uart_pipe_isr(struct device *dev)
|
|
{
|
|
uart_irq_update(dev);
|
|
|
|
if (uart_irq_is_pending(dev)) {
|
|
if (uart_irq_rx_ready(dev)) {
|
|
uart_pipe_rx(dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
int uart_pipe_send(const uint8_t *data, int len)
|
|
{
|
|
LOG_HEXDUMP_DBG(data, len, "TX");
|
|
|
|
while (len--) {
|
|
uart_poll_out(uart_pipe_dev, *data++);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void uart_pipe_setup(struct device *uart)
|
|
{
|
|
uint8_t c;
|
|
|
|
uart_irq_rx_disable(uart);
|
|
uart_irq_tx_disable(uart);
|
|
|
|
/* Drain the fifo */
|
|
while (uart_fifo_read(uart, &c, 1)) {
|
|
continue;
|
|
}
|
|
|
|
uart_irq_callback_set(uart, uart_pipe_isr);
|
|
|
|
uart_irq_rx_enable(uart);
|
|
}
|
|
|
|
void uart_pipe_register(uint8_t *buf, size_t len, uart_pipe_recv_cb cb)
|
|
{
|
|
recv_buf = buf;
|
|
recv_buf_len = len;
|
|
app_cb = cb;
|
|
|
|
uart_pipe_dev = device_get_binding(CONFIG_UART_PIPE_ON_DEV_NAME);
|
|
|
|
if (uart_pipe_dev != NULL) {
|
|
uart_pipe_setup(uart_pipe_dev);
|
|
}
|
|
}
|