190 lines
6.7 KiB
C
190 lines
6.7 KiB
C
/*
|
|
* Copyright 2016 Dius Computing Pty Ltd. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the
|
|
* distribution.
|
|
* - Neither the name of the copyright holders nor the names of
|
|
* its contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* @author Johny Mattsson <jmattsson@dius.com.au>
|
|
*/
|
|
|
|
#include "driver/console.h"
|
|
#include "esp_intr.h"
|
|
#include "esp_intr_alloc.h"
|
|
#include "soc/soc.h"
|
|
#include "soc/uart_reg.h"
|
|
#include "soc/dport_reg.h"
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/queue.h"
|
|
|
|
#include <unistd.h>
|
|
#include "rom/libc_stubs.h"
|
|
#include "sys/reent.h"
|
|
|
|
#define UART_INPUT_QUEUE_SZ 0x100
|
|
|
|
// These used to be available in soc/uart_register.h:
|
|
#define UART_GET_RXFIFO_RD_BYTE(i) GET_PERI_REG_BITS2(UART_FIFO_REG(i) , UART_RXFIFO_RD_BYTE_V, UART_RXFIFO_RD_BYTE_S)
|
|
#define UART_GET_RXFIFO_CNT(i) GET_PERI_REG_BITS2(UART_STATUS_REG(i) , UART_RXFIFO_CNT_V, UART_RXFIFO_CNT_S)
|
|
#define UART_SET_AUTOBAUD_EN(i,val) SET_PERI_REG_BITS(UART_AUTOBAUD_REG(i) ,UART_AUTOBAUD_EN_V,(val),UART_AUTOBAUD_EN_S)
|
|
# define UART_SET_PARITY_EN(i,val) SET_PERI_REG_BITS(UART_CONF0_REG(i) ,UART_PARITY_EN_V,(val),UART_PARITY_EN_S)
|
|
#define UART_SET_RX_TOUT_EN(i,val) SET_PERI_REG_BITS(UART_CONF1_REG(i) ,UART_RX_TOUT_EN_V,(val),UART_RX_TOUT_EN_S)
|
|
#define UART_SET_RX_TOUT_THRHD(i,val) SET_PERI_REG_BITS(UART_CONF1_REG(i) ,UART_RX_TOUT_THRHD_V,(val),UART_RX_TOUT_THRHD_S)
|
|
#define UART_SET_RXFIFO_FULL_THRHD(i,val) SET_PERI_REG_BITS(UART_CONF1_REG(i) ,UART_RXFIFO_FULL_THRHD_V,(val),UART_RXFIFO_FULL_THRHD_S)
|
|
#define UART_SET_STOP_BIT_NUM(i,val) SET_PERI_REG_BITS(UART_CONF0_REG(i) ,UART_STOP_BIT_NUM_V,(val),UART_STOP_BIT_NUM_S)
|
|
#define UART_SET_BIT_NUM(i,val) SET_PERI_REG_BITS(UART_CONF0_REG(i) ,UART_BIT_NUM_V,(val),UART_BIT_NUM_S)
|
|
#define UART_SET_PARITY_EN(i,val) SET_PERI_REG_BITS(UART_CONF0_REG(i) ,UART_PARITY_EN_V,(val),UART_PARITY_EN_S)
|
|
#define UART_SET_PARITY(i,val) SET_PERI_REG_BITS(UART_CONF0_REG(i) ,UART_PARITY_V,(val),UART_PARITY_S)
|
|
|
|
|
|
typedef int (*_read_r_fn) (struct _reent *r, int fd, void *buf, int size);
|
|
|
|
static _read_r_fn _read_r_pro, _read_r_app;
|
|
|
|
static xQueueHandle uart0Q;
|
|
static task_handle_t input_task = 0;
|
|
static intr_handle_t intr_handle;
|
|
|
|
// --- Syscall support for reading from STDIN_FILENO ---------------
|
|
|
|
static int console_read_r (struct _reent *r, int fd, void *buf, int size, _read_r_fn next)
|
|
{
|
|
if (fd == STDIN_FILENO)
|
|
{
|
|
static _lock_t stdin_lock;
|
|
_lock_acquire_recursive (&stdin_lock);
|
|
char *c = (char *)buf;
|
|
int i = 0;
|
|
for (; i < size; ++i)
|
|
{
|
|
if (!console_getc (c++))
|
|
break;
|
|
}
|
|
_lock_release_recursive (&stdin_lock);
|
|
return i;
|
|
}
|
|
else if (next)
|
|
return next (r, fd, buf, size);
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
static int console_read_r_pro (struct _reent *r, int fd, void *buf, int size)
|
|
{
|
|
return console_read_r (r, fd, buf, size, _read_r_pro);
|
|
}
|
|
static int console_read_r_app (struct _reent *r, int fd, void *buf, int size)
|
|
{
|
|
return console_read_r (r, fd, buf, size, _read_r_app);
|
|
}
|
|
|
|
// --- End syscall support -------------------------------------------
|
|
|
|
static void uart0_rx_intr_handler (void *arg)
|
|
{
|
|
(void)arg;
|
|
bool received = false;
|
|
uint32_t status = READ_PERI_REG(UART_INT_ST_REG(CONSOLE_UART));
|
|
while (status)
|
|
{
|
|
if (status & UART_FRM_ERR_INT_ENA)
|
|
{
|
|
// TODO: report somehow?
|
|
WRITE_PERI_REG(UART_INT_CLR_REG(CONSOLE_UART), UART_FRM_ERR_INT_ENA);
|
|
}
|
|
if ((status & UART_RXFIFO_TOUT_INT_ENA) ||
|
|
(status & UART_RXFIFO_FULL_INT_ENA))
|
|
{
|
|
uint32_t fifo_len = UART_GET_RXFIFO_CNT(CONSOLE_UART);
|
|
for (uint32_t i = 0; i < fifo_len; ++i)
|
|
{
|
|
received = true;
|
|
char c = UART_GET_RXFIFO_RD_BYTE(CONSOLE_UART);
|
|
if (uart0Q)
|
|
xQueueSendToBackFromISR (uart0Q, &c, NULL);
|
|
}
|
|
WRITE_PERI_REG(UART_INT_CLR_REG(CONSOLE_UART),
|
|
UART_RXFIFO_TOUT_INT_ENA | UART_RXFIFO_FULL_INT_ENA);
|
|
}
|
|
status = READ_PERI_REG(UART_INT_ST_REG(CONSOLE_UART));
|
|
}
|
|
if (received && input_task)
|
|
task_post_low (input_task, false);
|
|
}
|
|
|
|
|
|
void console_setup (const ConsoleSetup_t *cfg)
|
|
{
|
|
uart_tx_wait_idle (CONSOLE_UART);
|
|
|
|
uart_div_modify (CONSOLE_UART, (UART_CLK_FREQ << 4) / cfg->bit_rate);
|
|
UART_SET_BIT_NUM(CONSOLE_UART, cfg->data_bits);
|
|
UART_SET_PARITY_EN(CONSOLE_UART, cfg->parity != CONSOLE_PARITY_NONE);
|
|
UART_SET_PARITY(CONSOLE_UART, cfg->parity & 0x1);
|
|
UART_SET_STOP_BIT_NUM(CONSOLE_UART, cfg->stop_bits);
|
|
|
|
// TODO: Make this actually work
|
|
UART_SET_AUTOBAUD_EN(CONSOLE_UART, cfg->auto_baud);
|
|
}
|
|
|
|
|
|
|
|
void console_init (const ConsoleSetup_t *cfg, task_handle_t tsk)
|
|
{
|
|
input_task = tsk;
|
|
uart0Q = xQueueCreate (UART_INPUT_QUEUE_SZ, sizeof (char));
|
|
|
|
console_setup (cfg);
|
|
|
|
esp_intr_alloc (ETS_UART0_INTR_SOURCE + CONSOLE_UART,
|
|
ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_INTRDISABLED,
|
|
uart0_rx_intr_handler, NULL, &intr_handle);
|
|
|
|
UART_SET_RX_TOUT_EN(CONSOLE_UART, true);
|
|
UART_SET_RX_TOUT_THRHD(CONSOLE_UART, 2);
|
|
UART_SET_RXFIFO_FULL_THRHD(CONSOLE_UART, 10);
|
|
|
|
WRITE_PERI_REG(UART_INT_ENA_REG(CONSOLE_UART),
|
|
UART_RXFIFO_TOUT_INT_ENA |
|
|
UART_RXFIFO_FULL_INT_ENA |
|
|
UART_FRM_ERR_INT_ENA);
|
|
|
|
esp_intr_enable (intr_handle);
|
|
|
|
// Register our console_read_r_xxx functions to support stdin input
|
|
_read_r_pro = syscall_table_ptr_pro->_read_r;
|
|
_read_r_app = syscall_table_ptr_app->_read_r;
|
|
syscall_table_ptr_pro->_read_r = console_read_r_pro;
|
|
syscall_table_ptr_app->_read_r = console_read_r_app;
|
|
}
|
|
|
|
|
|
bool console_getc (char *c)
|
|
{
|
|
return (uart0Q && (xQueueReceive (uart0Q, c, 0) == pdTRUE));
|
|
}
|
|
|