implement rx/tx protocol routine of atmel microcontroller.
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ichiro
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528686cb43
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9ada1599ca
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@ -1,4 +1,4 @@
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/* $NetBSD: ipaq_atmel.h,v 1.1 2001/07/31 21:33:03 ichiro Exp $ */
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/* $NetBSD: ipaq_atmel.h,v 1.2 2001/08/02 18:51:01 ichiro Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved.
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@ -42,6 +42,7 @@
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/* Frame character */
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#define FRAME_SOF 0x02 /* Start of Frame character */
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#define FRAME_EOF 0x04 /* End of Frame character */
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#define FRAME_OVERHEAD_SIZE 3 /* FRAME_SOF + (ID+len) + checksum */
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/* ID */
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#define ID_VERSION 0x00 /* Get version ID */
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@ -56,6 +57,10 @@
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#define SET_BACKLIGHT 0x0d /* Backlight Control command */
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#define STATUS_EXTP 0xa1 /* Get status of Extension Pack */
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#define MAX_SENDSIZE 32 /* maximum data size of sendData() */
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#define MAX_RECVSIZE 16 /* maximum data size of recv data */
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/*
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* Battery status
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*/
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@ -1,4 +1,4 @@
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/* $NetBSD: ipaq_atmelgpio.c,v 1.1 2001/08/01 07:59:43 ichiro Exp $ */
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/* $NetBSD: ipaq_atmelgpio.c,v 1.2 2001/08/02 18:51:01 ichiro Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved.
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@ -54,15 +54,16 @@
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#include <hpcarm/dev/ipaq_saipvar.h>
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#include <hpcarm/dev/ipaq_gpioreg.h>
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#include <hpcarm/dev/ipaq_atmel.h>
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#include <hpcarm/dev/ipaq_atmelvar.h>
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#include <hpcarm/sa11x0/sa11x0_gpioreg.h>
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#include <hpcarm/sa11x0/sa11x0_comreg.h>
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#include <hpcarm/sa11x0/sa11x0_reg.h>
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struct atmelgpio_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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struct ipaq_softc *sc_parent;
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};
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#ifdef ATMEL_DEBUG
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#define DPRINTF(x) printf x
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#else
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#define DPRINTF(x)
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#endif
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static int atmelgpio_match(struct device *, struct cfdata *, void *);
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static void atmelgpio_attach(struct device *, struct device *, void *);
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@ -70,6 +71,9 @@ static int atmelgpio_print(void *, const char *);
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static int atmelgpio_search(struct device *, struct cfdata *, void *);
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static void atmelgpio_init(struct atmelgpio_softc *);
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static void rxtx_data(struct atmelgpio_softc *, int, int,
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u_int8_t *, struct atmel_rx *);
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struct cfattach atmelgpio_ca = {
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sizeof(struct atmelgpio_softc), atmelgpio_match, atmelgpio_attach
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};
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@ -92,6 +96,8 @@ atmelgpio_attach(parent, self, aux)
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struct atmelgpio_softc *sc = (struct atmelgpio_softc *)self;
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struct ipaq_softc *psc = (struct ipaq_softc *)parent;
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struct atmel_rx *rxbuf;
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printf("\n");
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printf("%s: Atmel microcontroller GPIO\n", sc->sc_dev.dv_xname);
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@ -107,6 +113,18 @@ atmelgpio_attach(parent, self, aux)
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atmelgpio_init(sc);
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#if 1 /* this is sample */
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rxtx_data(sc, STATUS_BATTERY, 0, NULL, rxbuf);
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printf("ac_status = %x\n", rxbuf->data[0]);
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printf("Battery kind = %x\n", rxbuf->data[1]);
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printf("Voltage = %d mV\n",
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1000 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /228);
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printf("Battery Status = %x\n", rxbuf->data[4]);
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printf("Battery percentage = %d\n",
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425 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /1000 - 298);
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#endif
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/*
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* Attach each devices
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*/
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@ -144,4 +162,81 @@ atmelgpio_init(sc)
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/* Set baud rate 115k */
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200));
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/* RX/TX enable, RX/TX FIFO interrupt enable */
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3,
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(CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE));
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}
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static void
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rxtx_data(sc, id, size, buf, rxbuf)
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struct atmelgpio_softc *sc;
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int id, size;
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u_int8_t *buf;
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struct atmel_rx *rxbuf;
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{
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int i, checksum, length, rx_data;
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u_int8_t data[MAX_SENDSIZE];
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length = size + FRAME_OVERHEAD_SIZE;
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while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS))
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;
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data[0] = (u_int8_t)FRAME_SOF;
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data[1] = (u_int8_t)((id << 4) | size);
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checksum = data[1];
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i = 2;
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while (size--) {
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data[i++] = *buf;
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checksum += (u_int8_t)(*buf++);
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}
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data[length-1] = checksum;
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while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF))
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;
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i = 0;
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while (i < length)
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]);
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delay(10000);
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#if 0
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while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) &
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(SR0_RID | SR0_RFS)))
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#endif
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rxbuf->state = STATE_SOF;
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while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) {
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rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR);
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DPRINTF(("DATA = %x\n", rx_data));
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switch (rxbuf->state) {
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case STATE_SOF:
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if (rx_data == FRAME_SOF)
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rxbuf->state = STATE_ID;
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break;
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case STATE_ID:
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rxbuf->id = (rx_data & 0xf0) >> 4;
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rxbuf->len = rx_data & 0x0f;
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rxbuf->idx = 0;
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rxbuf->checksum = rx_data;
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rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF;
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break;
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case STATE_DATA:
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rxbuf->checksum += rx_data;
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rxbuf->data[rxbuf->idx] = rx_data;
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if (++rxbuf->idx == rxbuf->len)
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rxbuf->state = STATE_EOF;
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break;
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case STATE_EOF:
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rxbuf->state = STATE_SOF;
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if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum)
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DPRINTF(("frame EOF\n"));
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else
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DPRINTF(("BadFrame\n"));
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break;
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default:
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break;
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}
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}
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}
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@ -0,0 +1,56 @@
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/* $NetBSD: ipaq_atmelvar.h,v 1.1 2001/08/02 18:51:00 ichiro Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ichiro FUKUHARA (ichiro@ichiro.org).
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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struct atmelgpio_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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struct ipaq_softc *sc_parent;
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};
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struct atmel_rx {
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u_int8_t id;
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u_int8_t len;
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u_int8_t idx;
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u_int8_t data[MAX_RECVSIZE];
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u_int8_t checksum;
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u_int8_t state;
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#define STATE_SOF 0
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#define STATE_ID 1
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#define STATE_DATA 2
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#define STATE_EOF 3
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};
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