diff options
Diffstat (limited to 'apps/systemcmds/i2c/i2c.c')
| -rw-r--r-- | apps/systemcmds/i2c/i2c.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/apps/systemcmds/i2c/i2c.c b/apps/systemcmds/i2c/i2c.c deleted file mode 100644 index e1babdc12..000000000 --- a/apps/systemcmds/i2c/i2c.c +++ /dev/null @@ -1,140 +0,0 @@ -/**************************************************************************** - * - * Copyright (C) 2012 PX4 Development Team. All rights reserved. - * Author: Lorenz Meier <lm@inf.ethz.ch> - * - * 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 PX4 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 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 i2c.c - * - * i2c hacking tool - */ - -#include <nuttx/config.h> - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdbool.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/mount.h> -#include <sys/ioctl.h> -#include <sys/stat.h> - -#include <nuttx/i2c.h> - -#include <arch/board/board.h> - -#include "systemlib/systemlib.h" -#include "systemlib/err.h" - -#ifndef PX4_I2C_BUS_ONBOARD -# error PX4_I2C_BUS_ONBOARD not defined, no device interface -#endif -#ifndef PX4_I2C_OBDEV_PX4IO -# error PX4_I2C_OBDEV_PX4IO not defined -#endif - -__EXPORT int i2c_main(int argc, char *argv[]); - -static int transfer(uint8_t address, uint8_t *send, unsigned send_len, uint8_t *recv, unsigned recv_len); - -static struct i2c_dev_s *i2c; - -int i2c_main(int argc, char *argv[]) -{ - /* find the right I2C */ - i2c = up_i2cinitialize(PX4_I2C_BUS_ONBOARD); - - if (i2c == NULL) - errx(1, "failed to locate I2C bus"); - - usleep(100000); - - uint8_t buf[] = { 0, 4}; - int ret = transfer(PX4_I2C_OBDEV_PX4IO, buf, sizeof(buf), NULL, 0); - - if (ret) - errx(1, "send failed - %d", ret); - - uint32_t val; - ret = transfer(PX4_I2C_OBDEV_PX4IO, NULL, 0, (uint8_t *)&val, sizeof(val)); - if (ret) - errx(1, "recive failed - %d", ret); - - errx(0, "got 0x%08x", val); -} - -static int -transfer(uint8_t address, uint8_t *send, unsigned send_len, uint8_t *recv, unsigned recv_len) -{ - struct i2c_msg_s msgv[2]; - unsigned msgs; - int ret; - - // debug("transfer out %p/%u in %p/%u", send, send_len, recv, recv_len); - - msgs = 0; - - if (send_len > 0) { - msgv[msgs].addr = address; - msgv[msgs].flags = 0; - msgv[msgs].buffer = send; - msgv[msgs].length = send_len; - msgs++; - } - - if (recv_len > 0) { - msgv[msgs].addr = address; - msgv[msgs].flags = I2C_M_READ; - msgv[msgs].buffer = recv; - msgv[msgs].length = recv_len; - msgs++; - } - - if (msgs == 0) - return -1; - - /* - * I2C architecture means there is an unavoidable race here - * if there are any devices on the bus with a different frequency - * preference. Really, this is pointless. - */ - I2C_SETFREQUENCY(i2c, 400000); - ret = I2C_TRANSFER(i2c, &msgv[0], msgs); - - // reset the I2C bus to unwedge on error - if (ret != OK) - up_i2creset(i2c); - - return ret; -} |