TWI driver for AS1108 3 Digit 7-Segment driver.
/* * Copyright (C) 2009 by Rittal GmbH & Co. KG, * Ulrich Prinz <prinz.u@rittal.de> * * 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 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. * * For additional information see http://www.ethernut.de/ */ /* * \verbatim * $Id: 7segtst.c 3108 2010-09-15 21:11:15Z Astralix $ * \endverbatim */ /* * Revision 1.0 2009/04/13 ulrichprinz * First checkin, new twi driver for AS1108 3 Digit 7-Segment driver * (currently SAM7X256 is tested only) * */ #include <cfg/os.h> #include <io.h> #include <stdio.h> #include <dev/board.h> #include <dev/spi_7seg.h> /* 7-Segment connection definition * correct these to the port and bus you use */ /* SPI-Chipselect of the Display driver */ #define NUT_CONFIG_7SEG_CS 1 /* SPI-Bus the driver is connected to */ #define NUT_CONFIG_7SEG_SPIBUS spiBus0At91 /* FILE handle for display */ FILE *disp; /* * Main application routine. * * Nut/OS automatically calls this entry after initialization. */ /******************************************************************/ int main(void) /******************************************************************/ { uint32_t baud = 115200; uint8_t rc; unsigned int count=0; /* * Register the UART device, open it, assign stdout to it and set * the baudrate. */ NutRegisterDevice(&DEV_DEBUG, 0, 0); freopen(DEV_DEBUG_NAME, "w", stdout); _ioctl(_fileno(stdout), UART_SETSPEED, &baud); /* * Register 7-Segment chip at the SPI bus. */ printf("initSPI_disp7seg... "); rc = NutRegisterSpiDevice(&devSpi7SEG,&NUT_CONFIG_7SEG_SPIBUS,NUT_CONFIG_7SEG_CS); if (rc != 0){ /* If it fails, leave a message and end here */ printf("FAILED\n"); fflush(stdout); while(1); } printf("OK\n"); /* The driver implements simple printf support for the display * so it can be opened as a file and used by fprintf() */ disp = fopen( devSpi7SEG.dev_name, "w"); for (;;) { /* Lets run a counter for a simple demo */ fprintf( disp, "%3d\n", count++); if(count >999)count=0; NutSleep(200); } return 0; }