459 lines
12 KiB
C
459 lines
12 KiB
C
/*
|
|
* Copyright (c) 2008 Swedish Institute of Computer Science
|
|
* 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
|
|
* 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 OWNER 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.
|
|
*/
|
|
/**
|
|
* \file
|
|
*
|
|
* \brief
|
|
* Handles the control of the USART for communication with the ATmega1284p
|
|
* for sending commands.
|
|
*
|
|
* \author
|
|
* Mike Vidales mavida404@gmail.com
|
|
*
|
|
*/
|
|
|
|
#include "uart.h"
|
|
#include "lcd.h"
|
|
#include "main.h"
|
|
#include "menu.h"
|
|
#include "beep.h"
|
|
|
|
/**
|
|
* \addtogroup lcd
|
|
* \{
|
|
*/
|
|
|
|
#define TIMEOUT (0xff)
|
|
|
|
/** \brief The RX circular buffer, for storing characters from serial port. */
|
|
tcirc_buf rxbuf;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will intialize the circular buffer head and tail of tcirc_buf struct.
|
|
*
|
|
* \param cbuf Pointer to buffer to initialize.
|
|
*/
|
|
void
|
|
uart_init_circ_buf(tcirc_buf *cbuf)
|
|
{
|
|
cbuf->head = cbuf->tail = 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will add a new character to the circular buffer.
|
|
*
|
|
* \param cbuf Pointer to buffer where character will be stored.
|
|
* \param ch Character to store into buffer.
|
|
*/
|
|
void
|
|
uart_add_to_circ_buf(tcirc_buf *cbuf, uint8_t ch)
|
|
{
|
|
/* Add char to buffer */
|
|
uint8_t newhead = cbuf->head;
|
|
newhead++;
|
|
if (newhead >= BUFSIZE){
|
|
newhead = 0;
|
|
}
|
|
if (newhead == cbuf->tail){
|
|
/* Buffer full, quit it */
|
|
return;
|
|
}
|
|
|
|
cbuf->buf[cbuf->head] = ch;
|
|
cbuf->head = newhead;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will get a character from the buffer requested.
|
|
*
|
|
* \param cbuf Pointer to buffer to get character from.
|
|
*
|
|
* \return retval Return character from buffer.
|
|
*/
|
|
uint8_t
|
|
uart_get_from_circ_buf(tcirc_buf *cbuf)
|
|
{
|
|
/* Get char from buffer. */
|
|
/* Be sure to check first that there is a char in buffer. */
|
|
uint8_t newtail = cbuf->tail;
|
|
uint8_t retval = cbuf->buf[newtail];
|
|
|
|
newtail++;
|
|
if (newtail >= BUFSIZE){
|
|
/* Rollover */
|
|
newtail = 0;
|
|
}
|
|
cbuf->tail = newtail;
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will clear the RX buffer.
|
|
*/
|
|
void
|
|
uart_clear_rx_buf(void)
|
|
{
|
|
rxbuf.tail = rxbuf.head = 0;
|
|
}
|
|
|
|
/**
|
|
* \brief This will check for a character in the requested buffer.
|
|
*
|
|
* \param cbuf Pointer to buffer to check for any characters.
|
|
*
|
|
* \return True if buffer empty.
|
|
*/
|
|
uint8_t
|
|
uart_circ_buf_has_char(tcirc_buf *cbuf)
|
|
{
|
|
/* Return true if buffer empty */
|
|
return (cbuf->head != cbuf->tail);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will convert a nibble to a hex value.
|
|
*
|
|
* \param val Value to convert to hex.
|
|
*
|
|
* \return val Converted hex value
|
|
*/
|
|
uint8_t
|
|
uip_ntohex(uint8_t val)
|
|
{
|
|
/* Convert nibble to hex */
|
|
if (val > 9){
|
|
return val + 'A' - 10;
|
|
}
|
|
else{
|
|
return val + '0';
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Convert integer to hex value.
|
|
*
|
|
* \param val Value to convert to hex.
|
|
* \param str Location to store converted value.
|
|
*/
|
|
void
|
|
itohex(uint8_t val,char *str)
|
|
{
|
|
*str++ = uip_ntohex(val >> 8);
|
|
*str = uip_ntohex(val & 0x0f);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will wait for a new character from the ATmega1284p and timeout
|
|
* if no new character is received.
|
|
*
|
|
* \retval TIMEOUT Returns if timeout has occured.
|
|
* \return retval Character returned upon seeing rx_char_ready()
|
|
*/
|
|
uint8_t
|
|
uart_get_char_rx(void)
|
|
{
|
|
/* Gets a serial char, and waits for timeout */
|
|
uint32_t timex = 5000000;
|
|
uint8_t retval;
|
|
|
|
while (!rx_char_ready()){
|
|
if (!timex--){
|
|
/* Timeout, return timeout */
|
|
return TIMEOUT;
|
|
}
|
|
}
|
|
|
|
retval = uart_get_from_circ_buf(&rxbuf);
|
|
return retval;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Initialize UART to 38400 Baud Rate and only
|
|
* enable UART for transmission.
|
|
*/
|
|
void
|
|
uart_init(void)
|
|
{
|
|
/* For Mega3290P, enable the uart peripheral */
|
|
PRR &= ~(1 << PRUSART0);
|
|
|
|
uart_clear_rx_buf();
|
|
/* 38400 baud @ 8 MHz internal RC oscillator (error = 0.2%) */
|
|
UBRR0 = BAUD_RATE_38400;
|
|
|
|
/* 8 bit character size, 1 stop bit and no parity mode */
|
|
UCSR0C = ( 3 << UCSZ00);
|
|
|
|
/* Enable RX,TX and RX interrupt on USART */
|
|
UCSR0B = (1 << RXEN0)|(1 << TXEN0)|(1 << RXCIE0);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Turn off UART for sleep mode.
|
|
*/
|
|
void
|
|
uart_deinit(void)
|
|
{
|
|
/* Disable RX,TX and RX interrupt on USART */
|
|
UCSR0B = 0;
|
|
|
|
/* for Mega3290P, disable the uart peripheral */
|
|
PRR |= (1 << PRUSART0);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Send one byte over the uart. This is called to send binary commands.
|
|
*
|
|
* \param byte The byte of data to send out the uart.
|
|
*/
|
|
void
|
|
uart_send_byte(uint8_t byte)
|
|
{
|
|
/* Wait for last char to be gone... */
|
|
while(!(UCSR0A & (1 << UDRE0)))
|
|
;
|
|
UDR0 = byte;
|
|
|
|
/* Clear the TXC bit to allow transmit complete test before sleep*/
|
|
UCSR0A |=(1 << TXC0);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This is the USART RX complete interrupt.
|
|
*/
|
|
ISR
|
|
(USART_RX_vect)
|
|
{
|
|
/* Get byte from serial port, put in Rx Buffer. */
|
|
uint8_t retval;
|
|
|
|
retval = UDR0;
|
|
uart_add_to_circ_buf(&rxbuf, retval);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This function builds and sends a binary command frame to the
|
|
* ATmega1284p.
|
|
*
|
|
* \param cmd Command to send.
|
|
* \param payload_length Length of data to be sent with command.
|
|
* \param payload Pointer to data to send.
|
|
*/
|
|
void
|
|
uart_serial_send_frame(uint8_t cmd, uint8_t payload_length, uint8_t *payload)
|
|
{
|
|
/* Send a frame to 1284p */
|
|
int8_t i;
|
|
|
|
uart_send_byte(SOF_CHAR);
|
|
uart_send_byte(payload_length);
|
|
uart_send_byte(cmd);
|
|
for (i=0;i<=payload_length-1;i++){
|
|
uart_send_byte(payload[i]);
|
|
}
|
|
uart_send_byte(EOF_CHAR);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This displays a time out message to the user based on the parameter
|
|
* reason x.
|
|
*
|
|
* \param x Reason for USART time out.
|
|
*/
|
|
void
|
|
uart_timeout_msg(uint8_t x)
|
|
{
|
|
char str[20] = "TO ";
|
|
|
|
dectoascii(x, str+3);
|
|
lcd_puts(str);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief This will receive a frame from the ATmega1284p and parse the incoming
|
|
* data.
|
|
*
|
|
* If the incoming data is a binary command acknowledgement, then this will not
|
|
* parse any data. If the incoming data is test reports, the menu will store the
|
|
* data for end of test metrics.
|
|
*
|
|
* \param wait_for_ack Flag used to wait for acknowledgement when receving a serial
|
|
* frame.
|
|
*/
|
|
void
|
|
uart_serial_rcv_frame(uint8_t wait_for_ack)
|
|
{
|
|
/* Gets a serial frame, if any, and displays data appropriately */
|
|
/* If wait_for_ack is true, this funtion will wait for serial chars. */
|
|
volatile uint8_t ch;
|
|
volatile uint8_t length;
|
|
volatile uint8_t cmd;
|
|
volatile uint8_t payload[20];
|
|
uint16_t i;
|
|
|
|
if (!wait_for_ack && !rx_char_ready()){
|
|
return;
|
|
}
|
|
|
|
/* Check for SOF */
|
|
ch = uart_get_char_rx();
|
|
if (ch != SOF_CHAR){
|
|
return uart_timeout_msg(1);
|
|
}
|
|
|
|
/* Turn on nose LED for activity indicator */
|
|
led_on();
|
|
|
|
/* Get length byte */
|
|
ch = uart_get_char_rx();
|
|
if (ch == TIMEOUT){
|
|
return uart_timeout_msg(2);
|
|
}
|
|
/* Check for ACK Frame */
|
|
if (ch >= 0x80){
|
|
/* This is an ack frame, just get it and go away. */
|
|
ch = uart_get_char_rx();
|
|
if (ch != EOF_CHAR){
|
|
uart_timeout_msg(3);
|
|
}
|
|
led_off();
|
|
return;
|
|
}
|
|
|
|
length = ch;
|
|
if (length > sizeof(payload)){
|
|
/* invalid length */
|
|
return;
|
|
}
|
|
|
|
/* Get cmd byte */
|
|
ch = uart_get_char_rx();
|
|
if (ch == TIMEOUT){
|
|
return uart_timeout_msg(5);
|
|
}
|
|
cmd = ch;
|
|
|
|
/* Get payload */
|
|
for (i=0;i<length;i++){
|
|
ch = uart_get_char_rx();
|
|
if (ch == TIMEOUT){
|
|
return uart_timeout_msg(i);
|
|
}
|
|
/* Save payload */
|
|
payload[i] = ch;
|
|
}
|
|
|
|
/* Get EOF */
|
|
ch = uart_get_char_rx();
|
|
if (ch != EOF_CHAR){
|
|
return uart_timeout_msg(7);
|
|
}
|
|
|
|
/* Process the received command */
|
|
switch (cmd){
|
|
case REPORT_PING:
|
|
/*
|
|
* This will update the lcd with the current ping status.
|
|
* Store the sequence number away.
|
|
*/
|
|
ping_response = payload[0];
|
|
|
|
if(ping_response == 1){
|
|
lcd_single_print_dig(ping_response, 3);
|
|
}
|
|
else if(ping_response == 2){
|
|
lcd_single_print_dig(ping_response, 2);
|
|
}
|
|
else if(ping_response == 3){
|
|
lcd_single_print_dig(ping_response, 1);
|
|
}
|
|
else if(ping_response == 4){
|
|
lcd_single_print_dig(ping_response, 0);
|
|
}
|
|
|
|
timeout_flag = false;
|
|
|
|
/* Beep on successful ping response. */
|
|
lcd_symbol_set(LCD_SYMBOL_BELL);
|
|
beep();
|
|
lcd_symbol_clr(LCD_SYMBOL_BELL);
|
|
break;
|
|
case REPORT_TEXT_MSG:
|
|
/* Copy text message to menu buffer and play ringtone */
|
|
/* Prezero in case no string terminator in command */
|
|
for (i=0;i<sizeof(top_menu_text);i++) top_menu_text[i]=0;
|
|
memcpy(&top_menu_text,(char *)payload,sizeof(top_menu_text)-1); //leave zero byte at end
|
|
play_ringtone();
|
|
break;
|
|
case REPORT_PING_BEEP:
|
|
lcd_symbol_set(LCD_SYMBOL_BELL);
|
|
beep();
|
|
lcd_symbol_clr(LCD_SYMBOL_BELL);
|
|
break;
|
|
case REPORT_WAKE:
|
|
/* Indicates 1284 is awake*/
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
led_off();
|
|
}
|
|
|
|
/** \} */
|