Merge pull request #715 from adamdunkels/pr/enc28j60
ENC28j60 Ethernet driver code
This commit is contained in:
Nicolas Tsiftes
commit
132b31d6de
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dev/enc28j60/enc28j60.c
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dev/enc28j60/enc28j60.c
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/*
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* Copyright (c) 2012-2013, Thingsquare, http://www.thingsquare.com/.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "contiki.h"
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#include "enc28j60.h"
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#include <stdio.h>
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#include <string.h>
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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#define EIE 0x1b
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#define EIR 0x1c
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#define ESTAT 0x1d
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#define ECON2 0x1e
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#define ECON1 0x1f
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#define ESTAT_CLKRDY 0x01
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#define ESTAT_TXABRT 0x02
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#define ECON1_RXEN 0x04
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#define ECON1_TXRTS 0x08
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#define ECON2_AUTOINC 0x80
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#define ECON2_PKTDEC 0x40
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#define EIR_TXIF 0x08
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#define ERXTX_BANK 0x00
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#define ERDPTL 0x00
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#define ERDPTH 0x01
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#define EWRPTL 0x02
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#define EWRPTH 0x03
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#define ETXSTL 0x04
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#define ETXSTH 0x05
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#define ETXNDL 0x06
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#define ETXNDH 0x07
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#define ERXSTL 0x08
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#define ERXSTH 0x09
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#define ERXNDL 0x0a
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#define ERXNDH 0x0b
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#define ERXRDPTL 0x0c
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#define ERXRDPTH 0x0d
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#define RX_BUF_START 0x0000
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#define RX_BUF_END 0x0fff
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#define TX_BUF_START 0x1200
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/* MACONx registers are in bank 2 */
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#define MACONX_BANK 0x02
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#define MACON1 0x00
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#define MACON2 0x01
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#define MACON3 0x02
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#define MACON4 0x03
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#define MABBIPG 0x04
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#define MAIPGL 0x06
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#define MAIPGH 0x07
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#define MAMXFLL 0x0a
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#define MAMXFLH 0x0b
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#define MACON1_TXPAUS 0x08
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#define MACON1_RXPAUS 0x04
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#define MACON1_MARXEN 0x01
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#define MACON2_MARST 0x80
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#define MACON3_PADCFG_FULL 0xe0
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#define MACON3_TXCRCEN 0x10
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#define MACON3_FRMLNEN 0x02
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#define MACON3_FULDPX 0x01
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#define MAX_MAC_LENGTH 1518
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#define MAADRX_BANK 0x03
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#define MAADR1 0x04 /* MAADR<47:40> */
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#define MAADR2 0x05 /* MAADR<39:32> */
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#define MAADR3 0x02 /* MAADR<31:24> */
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#define MAADR4 0x03 /* MAADR<23:16> */
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#define MAADR5 0x00 /* MAADR<15:8> */
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#define MAADR6 0x01 /* MAADR<7:0> */
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#define EPKTCNT_BANK 0x01
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#define ERXFCON 0x18
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#define EPKTCNT 0x19
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#define ERXFCON_UCEN 0x80
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#define ERXFCON_ANDOR 0x40
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#define ERXFCON_CRCEN 0x20
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#define ERXFCON_MCEN 0x02
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#define ERXFCON_BCEN 0x01
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PROCESS(enc_watchdog_process, "Enc28j60 watchdog");
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static uint8_t initialized = 0;
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static uint8_t enc_mac_addr[6];
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static int received_packets = 0;
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static int sent_packets = 0;
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/*---------------------------------------------------------------------------*/
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static uint8_t
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readreg(uint8_t reg)
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{
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uint8_t r;
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enc28j60_arch_spi_select();
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enc28j60_arch_spi_write(0x00 | (reg & 0x1f));
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r = enc28j60_arch_spi_read();
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enc28j60_arch_spi_deselect();
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return r;
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}
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/*---------------------------------------------------------------------------*/
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static void
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writereg(uint8_t reg, uint8_t data)
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{
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enc28j60_arch_spi_select();
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enc28j60_arch_spi_write(0x40 | (reg & 0x1f));
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enc28j60_arch_spi_write(data);
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enc28j60_arch_spi_deselect();
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}
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/*---------------------------------------------------------------------------*/
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static void
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setregbank(uint8_t bank)
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{
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writereg(ECON1, (readreg(ECON1) & 0xfc) | (bank & 0x03));
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}
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/*---------------------------------------------------------------------------*/
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static void
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writedatabyte(uint8_t byte)
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{
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enc28j60_arch_spi_select();
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/* The Write Buffer Memory (WBM) command is 0 1 1 1 1 0 1 0 */
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enc28j60_arch_spi_write(0x7a);
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enc28j60_arch_spi_write(byte);
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enc28j60_arch_spi_deselect();
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}
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/*---------------------------------------------------------------------------*/
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static void
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writedata(uint8_t *data, int datalen)
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{
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int i;
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enc28j60_arch_spi_select();
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/* The Write Buffer Memory (WBM) command is 0 1 1 1 1 0 1 0 */
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enc28j60_arch_spi_write(0x7a);
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for(i = 0; i < datalen; i++) {
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enc28j60_arch_spi_write(data[i]);
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}
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enc28j60_arch_spi_deselect();
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}
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/*---------------------------------------------------------------------------*/
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static uint8_t
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readdatabyte(void)
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{
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uint8_t r;
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enc28j60_arch_spi_select();
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/* THe Read Buffer Memory (RBM) command is 0 0 1 1 1 0 1 0 */
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enc28j60_arch_spi_write(0x3a);
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r = enc28j60_arch_spi_read();
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enc28j60_arch_spi_deselect();
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return r;
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}
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/*---------------------------------------------------------------------------*/
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static int
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readdata(uint8_t *buf, int len)
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{
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int i;
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enc28j60_arch_spi_select();
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/* THe Read Buffer Memory (RBM) command is 0 0 1 1 1 0 1 0 */
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enc28j60_arch_spi_write(0x3a);
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for(i = 0; i < len; i++) {
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buf[i] = enc28j60_arch_spi_read();
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}
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enc28j60_arch_spi_deselect();
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return i;
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}
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/*---------------------------------------------------------------------------*/
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static void
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softreset(void)
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{
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enc28j60_arch_spi_select();
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/* The System Command (soft reset) is 1 1 1 1 1 1 1 1 */
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enc28j60_arch_spi_write(0xff);
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enc28j60_arch_spi_deselect();
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}
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/*---------------------------------------------------------------------------*/
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static void
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reset(void)
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{
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PRINTF("enc28j60: resetting chip\n");
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enc28j60_arch_spi_init();
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/*
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6.0 INITIALIZATION
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Before the ENC28J60 can be used to transmit and receive packets,
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certain device settings must be initialized. Depending on the
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application, some configuration options may need to be
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changed. Normally, these tasks may be accomplished once after
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Reset and do not need to be changed thereafter.
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6.1 Receive Buffer
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Before receiving any packets, the receive buffer must be
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initialized by programming the ERXST and ERXND pointers. All
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memory between and including the ERXST and ERXND addresses will be
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dedicated to the receive hardware. It is recommended that the
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ERXST pointer be programmed with an even address.
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Applications expecting large amounts of data and frequent packet
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delivery may wish to allocate most of the memory as the receive
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buffer. Applications that may need to save older packets or have
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several packets ready for transmission should allocate less
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memory.
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When programming the ERXST pointer, the ERXWRPT registers will
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automatically be updated with the same values. The address in
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ERXWRPT will be used as the starting location when the receive
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hardware begins writing received data. For tracking purposes, the
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ERXRDPT registers should additionally be programmed with the same
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value. To program ERXRDPT, the host controller must write to
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ERXRDPTL first, followed by ERXRDPTH. See Section 7.2.4 “Freeing
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Receive Buffer Space for more information
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6.2 Transmission Buffer
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All memory which is not used by the receive buffer is considered
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the transmission buffer. Data which is to be transmitted should be
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written into any unused space. After a packet is transmitted,
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however, the hardware will write a seven-byte status vector into
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memory after the last byte in the packet. Therefore, the host
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controller should leave at least seven bytes between each packet
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and the beginning of the receive buffer. No explicit action is
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required to initialize the transmission buffer.
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6.3 Receive Filters
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The appropriate receive filters should be enabled or disabled by
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writing to the ERXFCON register. See Section 8.0 “Receive Filters
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for information on how to configure it.
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6.4 Waiting For OST
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If the initialization procedure is being executed immediately
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following a Power-on Reset, the ESTAT.CLKRDY bit should be polled
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to make certain that enough time has elapsed before proceeding to
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modify the MAC and PHY registers. For more information on the OST,
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see Section 2.2 “Oscillator Start-up Timer.
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*/
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/* Wait for OST */
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while((readreg(ESTAT) & ESTAT_CLKRDY) == 0);
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softreset();
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setregbank(ERXTX_BANK);
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/* Set up receive buffer */
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writereg(ERXSTL, RX_BUF_START & 0xff);
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writereg(ERXSTH, RX_BUF_START >> 8);
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writereg(ERXNDL, RX_BUF_END & 0xff);
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writereg(ERXNDH, RX_BUF_END >> 8);
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writereg(ERDPTL, RX_BUF_START & 0xff);
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writereg(ERDPTH, RX_BUF_START >> 8);
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writereg(ERXRDPTL, RX_BUF_START & 0xff);
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writereg(ERXRDPTH, RX_BUF_START >> 8);
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/* Receive filters */
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setregbank(EPKTCNT_BANK);
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/* writereg(ERXFCON, ERXFCON_UCEN | ERXFCON_CRCEN |
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ERXFCON_MCEN | ERXFCON_BCEN);*/
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/* XXX: can't seem to get the unicast filter to work right now,
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using promiscous mode for now. */
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writereg(ERXFCON, 0);
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/*
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6.5 MAC Initialization Settings
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Several of the MAC registers require configuration during
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initialization. This only needs to be done once; the order of
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programming is unimportant.
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1. Clear the MARST bit in MACON2 to pull the MAC out of Reset.
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2. Set the MARXEN bit in MACON1 to enable the MAC to receive
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frames. If using full duplex, most applications should also set
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TXPAUS and RXPAUS to allow IEEE defined flow control to function.
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3. Configure the PADCFG, TXCRCEN and FULDPX bits of MACON3. Most
|
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applications should enable automatic padding to at least 60 bytes
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and always append a valid CRC. For convenience, many applications
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may wish to set the FRMLNEN bit as well to enable frame length
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status reporting. The FULDPX bit should be set if the application
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will be connected to a full-duplex configured remote node;
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otherwise, it should be left clear.
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4. Configure the bits in MACON4. Many applications may not need to
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|
modify the Reset default.
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5. Program the MAMXFL registers with the maximum frame length to
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be permitted to be received or transmitted. Normal network nodes
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|
are designed to handle packets that are 1518 bytes or less.
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6. Configure the Back-to-Back Inter-Packet Gap register,
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MABBIPG. Most applications will program this register with 15h
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when Full-Duplex mode is used and 12h when Half-Duplex mode is
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used.
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7. Configure the Non-Back-to-Back Inter-Packet Gap register low
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byte, MAIPGL. Most applications will program this register with
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12h.
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8. If half duplex is used, the Non-Back-to-Back Inter-Packet Gap
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register high byte, MAIPGH, should be programmed. Most
|
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|
applications will program this register to 0Ch.
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|
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|
9. If Half-Duplex mode is used, program the Retransmission and
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Collision Window registers, MACLCON1 and MACLCON2. Most
|
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|
applications will not need to change the default Reset values. If
|
||||||
|
the network is spread over exceptionally long cables, the default
|
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|
value of MACLCON2 may need to be increased.
|
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|
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|
10. Program the local MAC address into the
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MAADR0:MAADR5 registers.
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|
*/
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setregbank(MACONX_BANK);
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|
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||||||
|
/* Pull MAC out of reset */
|
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|
writereg(MACON2, 0);//readreg(MACON2) & (~MACON2_MARST));
|
||||||
|
|
||||||
|
/* Turn on reception and IEEE-defined flow control */
|
||||||
|
writereg(MACON1, readreg(MACON1) | (MACON1_MARXEN + MACON1_TXPAUS +
|
||||||
|
MACON1_RXPAUS));
|
||||||
|
|
||||||
|
/* Set padding, crc, full duplex */
|
||||||
|
writereg(MACON3, readreg(MACON3) | (MACON3_PADCFG_FULL + MACON3_TXCRCEN +
|
||||||
|
MACON3_FULDPX + MACON3_FRMLNEN));
|
||||||
|
|
||||||
|
/* Don't modify MACON4 */
|
||||||
|
|
||||||
|
/* Set maximum frame length in MAMXFL */
|
||||||
|
writereg(MAMXFLL, MAX_MAC_LENGTH & 0xff);
|
||||||
|
writereg(MAMXFLH, MAX_MAC_LENGTH >> 8);
|
||||||
|
|
||||||
|
/* Set back-to-back inter packet gap */
|
||||||
|
writereg(MABBIPG, 0x15);
|
||||||
|
|
||||||
|
/* Set non-back-to-back packet gap */
|
||||||
|
writereg(MAIPGL, 0x12);
|
||||||
|
writereg(MAIPGH, 0x0c);
|
||||||
|
|
||||||
|
/* Set MAC address */
|
||||||
|
setregbank(MAADRX_BANK);
|
||||||
|
writereg(MAADR6, enc_mac_addr[5]);
|
||||||
|
writereg(MAADR5, enc_mac_addr[4]);
|
||||||
|
writereg(MAADR4, enc_mac_addr[3]);
|
||||||
|
writereg(MAADR3, enc_mac_addr[2]);
|
||||||
|
writereg(MAADR2, enc_mac_addr[1]);
|
||||||
|
writereg(MAADR1, enc_mac_addr[0]);
|
||||||
|
|
||||||
|
/* Receive filters */
|
||||||
|
setregbank(EPKTCNT_BANK);
|
||||||
|
writereg(ERXFCON, ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_BCEN);
|
||||||
|
|
||||||
|
/*
|
||||||
|
6.6 PHY Initialization Settings
|
||||||
|
|
||||||
|
Depending on the application, bits in three of the PHY module’s
|
||||||
|
registers may also require configuration. The PHCON1.PDPXMD bit
|
||||||
|
partially controls the device’s half/full-duplex
|
||||||
|
configuration. Normally, this bit is initialized correctly by the
|
||||||
|
external circuitry (see Section 2.6 “LED Configuration). If the
|
||||||
|
external circuitry is not present or incorrect, however, the host
|
||||||
|
controller must program the bit properly. Alternatively, for an
|
||||||
|
externally configurable system, the PDPXMD bit may be read and the
|
||||||
|
FULDPX bit be programmed to match.
|
||||||
|
|
||||||
|
For proper duplex operation, the PHCON1.PDPXMD bit must also match
|
||||||
|
the value of the MACON3.FULDPX bit.
|
||||||
|
|
||||||
|
If using half duplex, the host controller may wish to set the
|
||||||
|
PHCON2.HDLDIS bit to prevent automatic loopback of the data which
|
||||||
|
is transmitted. The PHY register, PHLCON, controls the outputs of
|
||||||
|
LEDA and LEDB. If an application requires a LED configuration
|
||||||
|
other than the default, PHLCON must be altered to match the new
|
||||||
|
requirements. The settings for LED operation are discussed in
|
||||||
|
Section 2.6 “LED Configuration. The PHLCON register is shown in
|
||||||
|
Register 2-2 (page 9).
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Don't worry about PHY configuration for now */
|
||||||
|
|
||||||
|
/* Turn on autoincrement for buffer access */
|
||||||
|
writereg(ECON2, readreg(ECON2) | ECON2_AUTOINC);
|
||||||
|
|
||||||
|
/* Turn on reception */
|
||||||
|
writereg(ECON1, ECON1_RXEN);
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
void
|
||||||
|
enc28j60_init(uint8_t *mac_addr)
|
||||||
|
{
|
||||||
|
if(initialized) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
memcpy(enc_mac_addr, mac_addr, 6);
|
||||||
|
|
||||||
|
/* Start watchdog process */
|
||||||
|
process_start(&enc_watchdog_process, NULL);
|
||||||
|
|
||||||
|
reset();
|
||||||
|
|
||||||
|
initialized = 1;
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
int
|
||||||
|
enc28j60_send(uint8_t *data, uint16_t datalen)
|
||||||
|
{
|
||||||
|
int padding = 0;
|
||||||
|
|
||||||
|
if(!initialized) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
1. Appropriately program the ETXST pointer to point to an unused
|
||||||
|
location in memory. It will point to the per packet control
|
||||||
|
byte. In the example, it would be programmed to 0120h. It is
|
||||||
|
recommended that an even address be used for ETXST.
|
||||||
|
|
||||||
|
2. Use the WBM SPI command to write the per packet control byte,
|
||||||
|
the destination address, the source MAC address, the
|
||||||
|
type/length and the data payload.
|
||||||
|
|
||||||
|
3. Appropriately program the ETXND pointer. It should point to the
|
||||||
|
last byte in the data payload. In the example, it would be
|
||||||
|
programmed to 0156h.
|
||||||
|
|
||||||
|
4. Clear EIR.TXIF, set EIE.TXIE and set EIE.INTIE to enable an
|
||||||
|
interrupt when done (if desired).
|
||||||
|
|
||||||
|
5. Start the transmission process by setting
|
||||||
|
ECON1.TXRTS.
|
||||||
|
*/
|
||||||
|
|
||||||
|
setregbank(ERXTX_BANK);
|
||||||
|
/* Set up the transmit buffer pointer */
|
||||||
|
writereg(ETXSTL, TX_BUF_START & 0xff);
|
||||||
|
writereg(ETXSTH, TX_BUF_START >> 8);
|
||||||
|
writereg(EWRPTL, TX_BUF_START & 0xff);
|
||||||
|
writereg(EWRPTH, TX_BUF_START >> 8);
|
||||||
|
|
||||||
|
/* Write the transmission control register as the first byte of the
|
||||||
|
output packet. We write 0x00 to indicate that the default
|
||||||
|
configuration (the values in MACON3) will be used. */
|
||||||
|
#define WITH_MANUAL_PADDING 1
|
||||||
|
#if WITH_MANUAL_PADDING
|
||||||
|
#define PADDING_MIN_SIZE 60
|
||||||
|
writedatabyte(0x0B); /* POVERRIDE, PCRCEN, PHUGEEN. Not PPADEN */
|
||||||
|
if(datalen < PADDING_MIN_SIZE) {
|
||||||
|
padding = PADDING_MIN_SIZE - datalen;
|
||||||
|
} else {
|
||||||
|
padding = 0;
|
||||||
|
}
|
||||||
|
#else /* WITH_MANUAL_PADDING */
|
||||||
|
writedatabyte(0x00); /* MACON3 */
|
||||||
|
padding = 0;
|
||||||
|
#endif /* WITH_MANUAL_PADDING */
|
||||||
|
|
||||||
|
/* Write a pointer to the last data byte. */
|
||||||
|
writereg(ETXNDL, (TX_BUF_START + datalen + 0 + padding) & 0xff);
|
||||||
|
writereg(ETXNDH, (TX_BUF_START + datalen + 0 + padding) >> 8);
|
||||||
|
|
||||||
|
writedata(data, datalen);
|
||||||
|
if(padding > 0) {
|
||||||
|
uint8_t padding_buf[60];
|
||||||
|
memset(padding_buf, 0, padding);
|
||||||
|
writedata(padding_buf, padding);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Clear EIR.TXIF */
|
||||||
|
writereg(EIR, readreg(EIR) & (~EIR_TXIF));
|
||||||
|
|
||||||
|
/* Don't care about interrupts for now */
|
||||||
|
|
||||||
|
/* Send the packet */
|
||||||
|
writereg(ECON1, readreg(ECON1) | ECON1_TXRTS);
|
||||||
|
while((readreg(ECON1) & ECON1_TXRTS) > 0);
|
||||||
|
|
||||||
|
if((readreg(ESTAT) & ESTAT_TXABRT) != 0) {
|
||||||
|
PRINTF("enc28j60: tx err: %d: %02x:%02x:%02x:%02x:%02x:%02x\n", datalen,
|
||||||
|
0xff & data[0], 0xff & data[1], 0xff & data[2],
|
||||||
|
0xff & data[3], 0xff & data[4], 0xff & data[5]);
|
||||||
|
} else {
|
||||||
|
PRINTF("enc28j60: tx: %d: %02x:%02x:%02x:%02x:%02x:%02x\n", datalen,
|
||||||
|
0xff & data[0], 0xff & data[1], 0xff & data[2],
|
||||||
|
0xff & data[3], 0xff & data[4], 0xff & data[5]);
|
||||||
|
}
|
||||||
|
sent_packets++;
|
||||||
|
PRINTF("enc28j60: sent_packets %d\n", sent_packets);
|
||||||
|
return datalen;
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
int
|
||||||
|
enc28j60_read(uint8_t *buffer, uint16_t bufsize)
|
||||||
|
{
|
||||||
|
int n, len, next, err;
|
||||||
|
|
||||||
|
uint8_t nxtpkt[2];
|
||||||
|
uint8_t status[2];
|
||||||
|
uint8_t length[2];
|
||||||
|
|
||||||
|
err = 0;
|
||||||
|
|
||||||
|
setregbank(EPKTCNT_BANK);
|
||||||
|
n = readreg(EPKTCNT);
|
||||||
|
|
||||||
|
if(n == 0) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
PRINTF("enc28j60: EPKTCNT 0x%02x\n", n);
|
||||||
|
|
||||||
|
setregbank(ERXTX_BANK);
|
||||||
|
/* Read the next packet pointer */
|
||||||
|
nxtpkt[0] = readdatabyte();
|
||||||
|
nxtpkt[1] = readdatabyte();
|
||||||
|
|
||||||
|
PRINTF("enc28j60: nxtpkt 0x%02x%02x\n", nxtpkt[1], nxtpkt[0]);
|
||||||
|
|
||||||
|
length[0] = readdatabyte();
|
||||||
|
length[1] = readdatabyte();
|
||||||
|
|
||||||
|
PRINTF("enc28j60: length 0x%02x%02x\n", length[1], length[0]);
|
||||||
|
|
||||||
|
status[0] = readdatabyte();
|
||||||
|
status[1] = readdatabyte();
|
||||||
|
|
||||||
|
/* This statement is just to avoid a compiler warning: */
|
||||||
|
status[0] = status[0];
|
||||||
|
PRINTF("enc28j60: status 0x%02x%02x\n", status[1], status[0]);
|
||||||
|
|
||||||
|
len = (length[1] << 8) + length[0];
|
||||||
|
if(bufsize >= len) {
|
||||||
|
readdata(buffer, len);
|
||||||
|
} else {
|
||||||
|
uint16_t i;
|
||||||
|
|
||||||
|
err = 1;
|
||||||
|
|
||||||
|
/* flush rx fifo */
|
||||||
|
for(i = 0; i < len; i++) {
|
||||||
|
readdatabyte();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Read an additional byte at odd lengths, to avoid FIFO corruption */
|
||||||
|
if((len % 2) != 0) {
|
||||||
|
readdatabyte();
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Errata #14 */
|
||||||
|
next = (nxtpkt[1] << 8) + nxtpkt[0];
|
||||||
|
if(next == RX_BUF_START) {
|
||||||
|
next = RX_BUF_END;
|
||||||
|
} else {
|
||||||
|
next = next - 1;
|
||||||
|
}
|
||||||
|
writereg(ERXRDPTL, next & 0xff);
|
||||||
|
writereg(ERXRDPTH, next >> 8);
|
||||||
|
|
||||||
|
writereg(ECON2, readreg(ECON2) | ECON2_PKTDEC);
|
||||||
|
|
||||||
|
if(err) {
|
||||||
|
PRINTF("enc28j60: rx err: flushed %d\n", len);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
PRINTF("enc28j60: rx: %d: %02x:%02x:%02x:%02x:%02x:%02x\n", len,
|
||||||
|
0xff & buffer[0], 0xff & buffer[1], 0xff & buffer[2],
|
||||||
|
0xff & buffer[3], 0xff & buffer[4], 0xff & buffer[5]);
|
||||||
|
|
||||||
|
received_packets++;
|
||||||
|
PRINTF("enc28j60: received_packets %d\n", received_packets);
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
PROCESS_THREAD(enc_watchdog_process, ev, data)
|
||||||
|
{
|
||||||
|
static struct etimer et;
|
||||||
|
|
||||||
|
PROCESS_BEGIN();
|
||||||
|
|
||||||
|
while(1) {
|
||||||
|
#define RESET_PERIOD (30 * CLOCK_SECOND)
|
||||||
|
etimer_set(&et, RESET_PERIOD);
|
||||||
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
|
||||||
|
|
||||||
|
PRINTF("enc28j60: test received_packet %d > sent_packets %d\n", received_packets, sent_packets);
|
||||||
|
if(received_packets <= sent_packets) {
|
||||||
|
PRINTF("enc28j60: resetting chip\n");
|
||||||
|
reset();
|
||||||
|
}
|
||||||
|
received_packets = 0;
|
||||||
|
sent_packets = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
PROCESS_END();
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
51
dev/enc28j60/enc28j60.h
Normal file
51
dev/enc28j60/enc28j60.h
Normal file
|
|
@ -0,0 +1,51 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2012-2013, Thingsquare, http://www.thingsquare.com/.
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. 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.
|
||||||
|
* 3. Neither the name of the copyright holder 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.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef ENC28J60_H
|
||||||
|
#define ENC28J60_H
|
||||||
|
|
||||||
|
void enc28j60_init(uint8_t *mac_addr);
|
||||||
|
|
||||||
|
int enc28j60_send(uint8_t *data, uint16_t datalen);
|
||||||
|
|
||||||
|
int enc28j60_read(uint8_t *buffer, uint16_t bufsize);
|
||||||
|
|
||||||
|
/* ENC28J60 architecture-specific SPI functions that are called by the
|
||||||
|
enc28j60 driver and must be implemented by the platform code */
|
||||||
|
|
||||||
|
void enc28j60_arch_spi_init(void);
|
||||||
|
uint8_t enc28j60_arch_spi_write(uint8_t data);
|
||||||
|
uint8_t enc28j60_arch_spi_read(void);
|
||||||
|
void enc28j60_arch_spi_select(void);
|
||||||
|
void enc28j60_arch_spi_deselect(void);
|
||||||
|
|
||||||
|
|
||||||
|
#endif /* ENC28J60_H */
|
||||||
Loading…
Reference in a new issue