From 7f59bc7eda975242f5e60aae9ca34d463e373dea Mon Sep 17 00:00:00 2001 From: Sebastian Pastor Date: Tue, 16 May 2017 22:29:00 +0200 Subject: [PATCH] dey-examples: add cmp_sample application for ccimx6ul This application tests the MCA comparator feature by configuring the thresholds, sample rate and other parameters. Signed-off-by: Sebastian Pastor https://jira.digi.com/browse/CC6UL-600 --- .../dey-examples/dey-examples-adc-cmp.bb | 18 + .../files/adc_cmp_sample/Makefile | 30 + .../files/adc_cmp_sample/adc_cmp_sample.c | 473 +++++++++++++ .../files/adc_cmp_sample/iio_utils.c | 669 ++++++++++++++++++ .../files/adc_cmp_sample/iio_utils.h | 71 ++ .../packagegroup-dey-examples.bb | 1 + 6 files changed, 1262 insertions(+) create mode 100644 meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc-cmp.bb create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/Makefile create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/adc_cmp_sample.c create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.c create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.h diff --git a/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc-cmp.bb b/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc-cmp.bb new file mode 100644 index 000000000..18c1f9946 --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc-cmp.bb @@ -0,0 +1,18 @@ +# Copyright (C) 2017 Digi International. + +SUMMARY = "DEY examples: Analog Comparator test application" +SECTION = "examples" +LICENSE = "GPL-2.0" +LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6" + +SRC_URI = "file://adc_cmp_sample" + +S = "${WORKDIR}/adc_cmp_sample" + +do_install() { + install -d ${D}${bindir} + install -m 0755 adc_cmp_sample ${D}${bindir} +} + +PACKAGE_ARCH = "${MACHINE_ARCH}" +COMPATIBLE_MACHINE = "(ccimx6ul)" diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/Makefile b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/Makefile new file mode 100644 index 000000000..7c6ef556f --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/Makefile @@ -0,0 +1,30 @@ +# *************************************************************************** +# Copyright (c) 2017 Digi International Inc. +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this file, +# You can obtain one at http://mozilla.org/MPL/2.0/. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +# PERFORMANCE OF THIS SOFTWARE. +# +# Digi International Inc. 11001 Bren Road East, Minnetonka, MN 55343 +# +# *************************************************************************** + +CFLAGS = -Wall -g -D_GNU_SOURCE + +all: adc_cmp_sample + +adc_cmp_sample: adc_cmp_sample.o iio_utils.o + +%.o: %.c iio_utils.h + +.PHONY: clean +clean: + rm -f *.o adc_cmp_sample diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/adc_cmp_sample.c b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/adc_cmp_sample.c new file mode 100644 index 000000000..3e533ccb8 --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/adc_cmp_sample.c @@ -0,0 +1,473 @@ +/* + * ConnectCore 6UL Analog Comparator sample application. + * + * Copyright (c) 2017 Digi International Inc. + * All rights reserved. + * + * Based on iio_event_monitor.c from the tools/iio directory, of the linux + * kernel. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "iio_utils.h" + +#define BUFFER_LEN 20 + +#define USAGE \ + "Usage:\n" \ + "adc_cmp_sample -c channel -l THRESH_LOW [options]\n\n" + +#define FULL_USAGE \ + "Usage:\n" \ + "adc_cmp_sample -c channel [options]\n\n" \ + "Options:\n" \ + " -c : channel number to read from\n" \ + " -h : Threshold_high higher limit of the comparator window\n" \ + " -l : Threshold_low lower limit of the comparator window\n" \ + " -e : edges enabled: 'rising', 'falling' or 'both'\n" \ + " -s : sample_rate how often to sample the input, in 100 ms units.\n"\ + " -v : use V for output and thresholds instead of raw values.\n"\ + " -? : help\n\n" + +typedef struct cmp { + char *sysfs_dir; + unsigned int channel; + double voltage_scale; + bool raw; +} cmp_t; + +static void show_usage(int full) +{ + fprintf(stdout, "%s", full ? FULL_USAGE : USAGE); +} + +static int read_adc_sample_sysfs(cmp_t *cmp, long int *val) +{ + int fd = -1; + int ret; + char buffer[BUFFER_LEN]; + char *path = NULL; + + ret = asprintf(&path, "%s/in_voltage%u_raw", + cmp->sysfs_dir, cmp->channel); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto exit; + } + + fd = open(path, O_RDONLY); + if (fd < 0) { + fprintf(stdout, "%s: failed to open %s\n", + __func__, path); + ret = fd; + goto exit; + } + + ret = read(fd, buffer, BUFFER_LEN); + if (ret < 0) { + fprintf(stdout, "%s: failed to read ADC sample from %s (%d)\n", + __func__, path, ret); + goto exit; + } + + if (ret == 0) { + fprintf(stdout, "%s: no data available in %s\n", + __func__, path); + ret = -ENODATA; + goto exit; + } + + *val = strtol(buffer, NULL, 10); + ret = 0; + +exit: + free(path); + close(fd); + return ret; +} + +static int read_cmp_out_sysfs(cmp_t *cmp, int *val) +{ + int fd = -1; + int ret; + char buffer[BUFFER_LEN]; + char *path = NULL; + + ret = asprintf(&path, "%s/in_voltage%u_cmp_out", + cmp->sysfs_dir, cmp->channel); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto exit; + } + + fd = open(path, O_RDONLY); + if (fd < 0) { + fprintf(stdout, "%s: failed to open %s\n", + __func__, path); + ret = fd; + goto exit; + } + + ret = read(fd, buffer, BUFFER_LEN); + if (ret < 0) { + fprintf(stdout, + "%s: failed to read Comparator Output from %s (%d)\n", + __func__, path, ret); + goto exit; + } else if (ret == 0) { + fprintf(stdout, "%s: no data available in %s\n", + __func__, path); + ret = -ENODATA; + goto exit; + } + + *val = strtol(buffer, NULL, 10); + ret = 0; + +exit: + free(path); + close(fd); + + return ret; +} + +static void process_event(cmp_t *cmp, struct iio_event_data *event) +{ + enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); + int channel = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); + const char *dir_str; + long sample_val; + int cmp_out; + int ret; + + switch (dir) { + case IIO_EV_DIR_EITHER: + dir_str = "Both"; + break; + case IIO_EV_DIR_RISING: + dir_str = "Rising"; + break; + case IIO_EV_DIR_FALLING: + dir_str = "Falling"; + break; + default: + dir_str = "Unknown"; + break; + } + + ret = read_adc_sample_sysfs(cmp, &sample_val); + if (ret) { + fprintf(stdout, "Failed to read ADC value\n"); + return; + } + + ret = read_cmp_out_sysfs(cmp, &cmp_out); + if (ret) { + fprintf(stdout, "Failed to read CMP Out\n"); + return; + } + + fprintf(stdout, "\n\nGot a Comparator event!\n"); + fprintf(stdout, "\tTime: %lld\n", event->timestamp); + fprintf(stdout, "\tChannel: %d\n", channel); + fprintf(stdout, "\tCMP Out: %d\n", (unsigned int)cmp_out); + fprintf(stdout, "\tEdge: %s\n", dir_str); + + if (cmp->raw) + fprintf(stdout, "\tADC Value: 0x%04x\n", + (unsigned int)sample_val); + else + fprintf(stdout, "\tADC Value: %.2f V\n", + sample_val * cmp->voltage_scale / 1000); +} + +static int read_voltage_scale(cmp_t *cmp) +{ + int fd, ret; + char buffer[BUFFER_LEN]; + char *temp; + + if (cmp->raw) + return 0; + + /* Read the voltage scale from the sysfs */ + ret = asprintf(&temp, "%s/in_voltage_scale", cmp->sysfs_dir); + if (ret < 0) { + fprintf(stdout, "%s: failed to allocate memory\n", __func__); + return -ENOMEM; + } + + fd = open(temp, O_RDONLY); + if (fd < 0) { + fprintf(stdout, "%s: failed to open %s\n", __func__, temp); + ret = fd; + goto free_temp; + } + + ret = read(fd, buffer, BUFFER_LEN); + if (ret < 0) { + fprintf(stdout, + "%s: failed to read voltage scale from %s (%d)\n", + __func__, temp, ret); + goto close_fd; + } else if (ret == 0) { + fprintf(stdout, + "%s: no data available in %s\n", __func__, temp); + ret = -ENODATA; + goto close_fd; + } + + cmp->voltage_scale = atof(buffer); + +close_fd: + close(fd); +free_temp: + free(temp); + return ret; +} + +static int write_in_path(const char *path, const char *str) +{ + int fd = -1; + int ret; + + fd = open(path, O_RDWR); + if (fd < 0) { + fprintf(stdout, "%s: failed to open %s\n", + __func__, path); + ret = fd; + goto exit; + } + + ret = write(fd, str, strlen(str)); + if (ret < 0) { + fprintf(stdout, "%s: failed to write data to %s (%d)\n", + __func__, path, ret); + goto exit; + } + +exit: + close(fd); + return ret; +} + +static int configure_comparator(cmp_t *cmp, uint16_t th_l, uint16_t th_h, + uint16_t srate, char *edge) +{ + char *path; + char buffer[BUFFER_LEN]; + int ret; + + /* Allocate a few bytes more, since it's reused several times */ + path = malloc(strlen(cmp->sysfs_dir) + strlen("/in_voltageX_cmp_thr_l") + + 15); + if (!path) { + fprintf(stdout, "Failed to allocate memory\n"); + goto exit; + } + + /* Configure Threshold LOW */ + sprintf(path, "%s/in_voltage%u_cmp_thr_l", + cmp->sysfs_dir, cmp->channel); + sprintf(buffer, "%d", th_l); + + ret = write_in_path(path, buffer); + if (ret < 0) + goto exit; + + /* Configure Threshold HIGH */ + sprintf(path, "%s/in_voltage%u_cmp_thr_h", + cmp->sysfs_dir, cmp->channel); + sprintf(buffer, "%d", th_h); + + ret = write_in_path(path, buffer); + if (ret < 0) + goto exit; + + /* Configure Sample rate */ + sprintf(path, "%s/in_voltage%u_cmp_rate", + cmp->sysfs_dir, cmp->channel); + sprintf(buffer, "%d", srate); + + ret = write_in_path(path, buffer); + if (ret < 0) + goto exit; + + /* Configure Edge */ + sprintf(path, "%s/in_voltage%u_cmp_edge", + cmp->sysfs_dir, cmp->channel); + + ret = write_in_path(path, edge); + if (ret < 0) + goto exit; +exit: + free(path); + + return ret; +} + +int main(int argc, char **argv) +{ + int ret, opt; + int fd = -1; + int event_fd = -1; + char *chrdev_path = NULL; + char *edge = NULL; + int dev_num; + unsigned int sample_rate = 1; + double threshold_low = 0; + double threshold_high = 0xFFFF; + cmp_t cmp = { + .sysfs_dir = NULL, + .raw = true, + }; + struct iio_event_data event; + + if (argc <= 3) { + show_usage(0); + return EXIT_FAILURE; + } + + while ((opt = getopt(argc, argv, "c:h:l:s:e:v?")) > 0) { + switch (opt) { + case 'c': + cmp.channel = strtoul(optarg, NULL, 10); + break; + case 'h': + threshold_high = atof(optarg); + break; + case 'l': + threshold_low = atof(optarg); + break; + case 's': + sample_rate = strtoul(optarg, NULL, 10); + break; + case 'e': + if (!strcmp(optarg, "rising") && + !strcmp(optarg, "falling") && + !strcmp(optarg, "both")) { + fprintf(stdout, + "Invalid edge (%s)\n", + optarg); + goto exit; + } + edge = strdup(optarg); + if (!edge) { + fprintf(stdout, "Failed to allocate memory\n"); + goto exit; + } + break; + case 'v': + cmp.raw = false; + break; + case '?': + show_usage(1); + return EXIT_SUCCESS; + default: + show_usage(0); + return EXIT_FAILURE; + } + } + + if (!edge) { + edge = strdup("both"); + if (!edge) { + fprintf(stdout, "Failed to allocate memory\n"); + goto exit; + } + } + + dev_num = find_type_by_name("mca-cc6ul-adc", "iio:device"); + if (dev_num < 0) { + fprintf(stdout, + "Failed to find iio:device for mca-cc6ul-adc\n"); + ret = -ENODEV; + goto exit; + } + + ret = asprintf(&chrdev_path, "/dev/iio:device%d", dev_num); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto exit; + } + + ret = asprintf(&cmp.sysfs_dir, "/sys/bus/iio/devices/iio:device%d", + dev_num); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto exit; + } + + if (!cmp.raw) { + ret = read_voltage_scale(&cmp); + if (ret < 0) + goto exit; + threshold_high = threshold_high * 1000 / cmp.voltage_scale; + threshold_low = threshold_low * 1000 / cmp.voltage_scale; + } + + ret = configure_comparator(&cmp, threshold_low, threshold_high, + sample_rate, edge); + if (ret < 0) + goto exit; + + + fd = open(chrdev_path, 0); + if (fd < 0) { + fprintf(stdout, "Failed to open %s\n", chrdev_path); + ret = fd; + goto exit; + } + + ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); + + close(fd); + if (ret < 0 || event_fd < 0) { + fprintf(stdout, "Failed to retrieve event fd\n"); + ret = fd; + goto exit; + } + + fprintf(stdout, "Waiting for events:\n"); + + while (true) { + ret = read(event_fd, &event, sizeof(event)); + if (ret < 0) { + if (errno == EAGAIN) { + fprintf(stdout, "No events... continue\n"); + continue; + } else { + perror("Failed to read event from device"); + ret = -errno; + break; + } + } + process_event(&cmp, &event); + } + +exit: + free(cmp.sysfs_dir); + free(chrdev_path); + free(edge); + close(event_fd); + + return ret; +} diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.c b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.c new file mode 100644 index 000000000..6f6452167 --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.c @@ -0,0 +1,669 @@ +/* IIO - useful set of util functionality + * + * Copyright (c) 2008 Jonathan Cameron + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ +#ifndef _IIO_UTILS_H +#define _IIO_UTILS_H + +#include +#include +#include +#include +#include +#include +#include +#include "iio_utils.h" + +const char *iio_dir = "/sys/bus/iio/devices/"; + +static char * const iio_direction[] = { + "in", + "out", +}; + +/** + * iioutils_break_up_name() - extract generic name from full channel name + * @full_name: the full channel name + * @generic_name: the output generic channel name + **/ +int iioutils_break_up_name(const char *full_name, + char **generic_name) +{ + char *current; + char *w, *r; + char *working, *prefix = ""; + int i; + + for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++) + if (!strncmp(full_name, iio_direction[i], + strlen(iio_direction[i]))) { + prefix = iio_direction[i]; + break; + } + + current = strdup(full_name + strlen(prefix) + 1); + working = strtok(current, "_\0"); + + w = working; + r = working; + + while (*r != '\0') { + if (!isdigit(*r)) { + *w = *r; + w++; + } + r++; + } + *w = '\0'; + asprintf(generic_name, "%s_%s", prefix, working); + free(current); + + return 0; +} + +/** + * iioutils_get_type() - find and process _type attribute data + * @is_signed: output whether channel is signed + * @bytes: output how many bytes the channel storage occupies + * @mask: output a bit mask for the raw data + * @be: big endian + * @device_dir: the iio device directory + * @name: the channel name + * @generic_name: the channel type name + **/ +int iioutils_get_type(unsigned *is_signed, + unsigned *bytes, + unsigned *bits_used, + unsigned *shift, + uint64_t *mask, + unsigned *be, + const char *device_dir, + const char *name, + const char *generic_name) +{ + FILE *sysfsfp; + int ret; + DIR *dp; + char *scan_el_dir, *builtname, *builtname_generic, *filename = 0; + char signchar, endianchar; + unsigned padint; + const struct dirent *ent; + + ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir); + if (ret < 0) { + ret = -ENOMEM; + goto error_ret; + } + ret = asprintf(&builtname, FORMAT_TYPE_FILE, name); + if (ret < 0) { + ret = -ENOMEM; + goto error_free_scan_el_dir; + } + ret = asprintf(&builtname_generic, FORMAT_TYPE_FILE, generic_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_free_builtname; + } + + dp = opendir(scan_el_dir); + if (dp == NULL) { + ret = -errno; + goto error_free_builtname_generic; + } + while (ent = readdir(dp), ent != NULL) + /* + * Do we allow devices to override a generic name with + * a specific one? + */ + if ((strcmp(builtname, ent->d_name) == 0) || + (strcmp(builtname_generic, ent->d_name) == 0)) { + ret = asprintf(&filename, + "%s/%s", scan_el_dir, ent->d_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_closedir; + } + sysfsfp = fopen(filename, "r"); + if (sysfsfp == NULL) { + printf("failed to open %s\n", filename); + ret = -errno; + goto error_free_filename; + } + + ret = fscanf(sysfsfp, + "%ce:%c%u/%u>>%u", + &endianchar, + &signchar, + bits_used, + &padint, shift); + if (ret < 0) { + printf("failed to pass scan type description\n"); + ret = -errno; + goto error_close_sysfsfp; + } + *be = (endianchar == 'b'); + *bytes = padint / 8; + if (*bits_used == 64) + *mask = ~0; + else + *mask = (1 << *bits_used) - 1; + if (signchar == 's') + *is_signed = 1; + else + *is_signed = 0; + fclose(sysfsfp); + free(filename); + + filename = 0; + sysfsfp = 0; + } +error_close_sysfsfp: + if (sysfsfp) + fclose(sysfsfp); +error_free_filename: + if (filename) + free(filename); +error_closedir: + closedir(dp); +error_free_builtname_generic: + free(builtname_generic); +error_free_builtname: + free(builtname); +error_free_scan_el_dir: + free(scan_el_dir); +error_ret: + return ret; +} + +int iioutils_get_param_float(float *output, + const char *param_name, + const char *device_dir, + const char *name, + const char *generic_name) +{ + FILE *sysfsfp; + int ret; + DIR *dp; + char *builtname, *builtname_generic; + char *filename = NULL; + const struct dirent *ent; + + ret = asprintf(&builtname, "%s_%s", name, param_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_ret; + } + ret = asprintf(&builtname_generic, + "%s_%s", generic_name, param_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_free_builtname; + } + dp = opendir(device_dir); + if (dp == NULL) { + ret = -errno; + goto error_free_builtname_generic; + } + while (ent = readdir(dp), ent != NULL) + if ((strcmp(builtname, ent->d_name) == 0) || + (strcmp(builtname_generic, ent->d_name) == 0)) { + ret = asprintf(&filename, + "%s/%s", device_dir, ent->d_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_closedir; + } + sysfsfp = fopen(filename, "r"); + if (!sysfsfp) { + ret = -errno; + goto error_free_filename; + } + fscanf(sysfsfp, "%f", output); + break; + } +error_free_filename: + if (filename) + free(filename); +error_closedir: + closedir(dp); +error_free_builtname_generic: + free(builtname_generic); +error_free_builtname: + free(builtname); +error_ret: + return ret; +} + +/** + * bsort_channel_array_by_index() - reorder so that the array is in index order + * + **/ + +void bsort_channel_array_by_index(struct iio_channel_info **ci_array, + int cnt) +{ + + struct iio_channel_info temp; + int x, y; + + for (x = 0; x < cnt; x++) + for (y = 0; y < (cnt - 1); y++) + if ((*ci_array)[y].index > (*ci_array)[y+1].index) { + temp = (*ci_array)[y + 1]; + (*ci_array)[y + 1] = (*ci_array)[y]; + (*ci_array)[y] = temp; + } +} + +/** + * build_channel_array() - function to figure out what channels are present + * @device_dir: the IIO device directory in sysfs + * @ + **/ +int build_channel_array(const char *device_dir, + struct iio_channel_info **ci_array, + int *counter) +{ + DIR *dp; + FILE *sysfsfp; + int count, i; + struct iio_channel_info *current; + int ret; + const struct dirent *ent; + char *scan_el_dir; + char *filename; + + *counter = 0; + ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir); + if (ret < 0) { + ret = -ENOMEM; + goto error_ret; + } + dp = opendir(scan_el_dir); + if (dp == NULL) { + ret = -errno; + goto error_free_name; + } + while (ent = readdir(dp), ent != NULL) + if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"), + "_en") == 0) { + ret = asprintf(&filename, + "%s/%s", scan_el_dir, ent->d_name); + if (ret < 0) { + ret = -ENOMEM; + goto error_close_dir; + } + sysfsfp = fopen(filename, "r"); + if (sysfsfp == NULL) { + ret = -errno; + free(filename); + goto error_close_dir; + } + fscanf(sysfsfp, "%i", &ret); + if (ret == 1) + (*counter)++; + fclose(sysfsfp); + free(filename); + } + *ci_array = malloc(sizeof(**ci_array) * (*counter)); + if (*ci_array == NULL) { + ret = -ENOMEM; + goto error_close_dir; + } + seekdir(dp, 0); + count = 0; + while (ent = readdir(dp), ent != NULL) { + if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"), + "_en") == 0) { + int current_enabled = 0; + + current = &(*ci_array)[count++]; + ret = asprintf(&filename, + "%s/%s", scan_el_dir, ent->d_name); + if (ret < 0) { + ret = -ENOMEM; + /* decrement count to avoid freeing name */ + count--; + goto error_cleanup_array; + } + sysfsfp = fopen(filename, "r"); + if (sysfsfp == NULL) { + free(filename); + ret = -errno; + goto error_cleanup_array; + } + fscanf(sysfsfp, "%i", ¤t_enabled); + fclose(sysfsfp); + + if (!current_enabled) { + free(filename); + count--; + continue; + } + + current->scale = 1.0; + current->offset = 0; + current->name = strndup(ent->d_name, + strlen(ent->d_name) - + strlen("_en")); + if (current->name == NULL) { + free(filename); + ret = -ENOMEM; + goto error_cleanup_array; + } + /* Get the generic and specific name elements */ + ret = iioutils_break_up_name(current->name, + ¤t->generic_name); + if (ret) { + free(filename); + goto error_cleanup_array; + } + ret = asprintf(&filename, + "%s/%s_index", + scan_el_dir, + current->name); + if (ret < 0) { + free(filename); + ret = -ENOMEM; + goto error_cleanup_array; + } + sysfsfp = fopen(filename, "r"); + fscanf(sysfsfp, "%u", ¤t->index); + fclose(sysfsfp); + free(filename); + /* Find the scale */ + ret = iioutils_get_param_float(¤t->scale, + "scale", + device_dir, + current->name, + current->generic_name); + if (ret < 0) + goto error_cleanup_array; + ret = iioutils_get_param_float(¤t->offset, + "offset", + device_dir, + current->name, + current->generic_name); + if (ret < 0) + goto error_cleanup_array; + ret = iioutils_get_type(¤t->is_signed, + ¤t->bytes, + ¤t->bits_used, + ¤t->shift, + ¤t->mask, + ¤t->be, + device_dir, + current->name, + current->generic_name); + } + } + + closedir(dp); + /* reorder so that the array is in index order */ + bsort_channel_array_by_index(ci_array, *counter); + + return 0; + +error_cleanup_array: + for (i = count - 1; i >= 0; i--) + free((*ci_array)[i].name); + free(*ci_array); +error_close_dir: + closedir(dp); +error_free_name: + free(scan_el_dir); +error_ret: + return ret; +} + +/** + * find_type_by_name() - function to match top level types by name + * @name: top level type instance name + * @type: the type of top level instance being sort + * + * Typical types this is used for are device and trigger. + **/ +int find_type_by_name(const char *name, const char *type) +{ + const struct dirent *ent; + int number, numstrlen; + + FILE *nameFile; + DIR *dp; + char thisname[IIO_MAX_NAME_LENGTH]; + char *filename; + + dp = opendir(iio_dir); + if (dp == NULL) { + printf("No industrialio devices available\n"); + return -ENODEV; + } + + while (ent = readdir(dp), ent != NULL) { + if (strcmp(ent->d_name, ".") != 0 && + strcmp(ent->d_name, "..") != 0 && + strlen(ent->d_name) > strlen(type) && + strncmp(ent->d_name, type, strlen(type)) == 0) { + numstrlen = sscanf(ent->d_name + strlen(type), + "%d", + &number); + /* verify the next character is not a colon */ + if (strncmp(ent->d_name + strlen(type) + numstrlen, + ":", + 1) != 0) { + filename = malloc(strlen(iio_dir) + + strlen(type) + + numstrlen + + 6); + if (filename == NULL) { + closedir(dp); + return -ENOMEM; + } + sprintf(filename, "%s%s%d/name", + iio_dir, + type, + number); + nameFile = fopen(filename, "r"); + if (!nameFile) { + free(filename); + continue; + } + free(filename); + fscanf(nameFile, "%s", thisname); + fclose(nameFile); + if (strcmp(name, thisname) == 0) { + closedir(dp); + return number; + } + } + } + } + closedir(dp); + return -ENODEV; +} + +int _write_sysfs_int(char *filename, char *basedir, int val, int verify) +{ + int ret = 0; + FILE *sysfsfp; + int test; + char *temp = malloc(strlen(basedir) + strlen(filename) + 2); + + if (temp == NULL) + return -ENOMEM; + sprintf(temp, "%s/%s", basedir, filename); + sysfsfp = fopen(temp, "w"); + if (sysfsfp == NULL) { + printf("failed to open %s\n", temp); + ret = -errno; + goto error_free; + } + fprintf(sysfsfp, "%d", val); + fclose(sysfsfp); + if (verify) { + sysfsfp = fopen(temp, "r"); + if (sysfsfp == NULL) { + printf("failed to open %s\n", temp); + ret = -errno; + goto error_free; + } + fscanf(sysfsfp, "%d", &test); + fclose(sysfsfp); + if (test != val) { + printf("Possible failure in int write %d to %s%s\n", + val, + basedir, + filename); + ret = -1; + } + } +error_free: + free(temp); + return ret; +} + +int write_sysfs_int(char *filename, char *basedir, int val) +{ + return _write_sysfs_int(filename, basedir, val, 0); +} + +int write_sysfs_int_and_verify(char *filename, char *basedir, int val) +{ + return _write_sysfs_int(filename, basedir, val, 1); +} + +int _write_sysfs_string(char *filename, char *basedir, char *val, int verify) +{ + int ret = 0; + FILE *sysfsfp; + char *temp = malloc(strlen(basedir) + strlen(filename) + 2); + + if (temp == NULL) { + printf("Memory allocation failed\n"); + return -ENOMEM; + } + sprintf(temp, "%s/%s", basedir, filename); + sysfsfp = fopen(temp, "w"); + if (sysfsfp == NULL) { + printf("Could not open %s\n", temp); + ret = -errno; + goto error_free; + } + fprintf(sysfsfp, "%s", val); + fclose(sysfsfp); + if (verify) { + sysfsfp = fopen(temp, "r"); + if (sysfsfp == NULL) { + printf("could not open file to verify\n"); + ret = -errno; + goto error_free; + } + fscanf(sysfsfp, "%s", temp); + fclose(sysfsfp); + if (strcmp(temp, val) != 0) { + printf("Possible failure in string write of %s " + "Should be %s " + "written to %s\%s\n", + temp, + val, + basedir, + filename); + ret = -1; + } + } +error_free: + free(temp); + + return ret; +} + +/** + * write_sysfs_string_and_verify() - string write, readback and verify + * @filename: name of file to write to + * @basedir: the sysfs directory in which the file is to be found + * @val: the string to write + **/ +int write_sysfs_string_and_verify(char *filename, char *basedir, char *val) +{ + return _write_sysfs_string(filename, basedir, val, 1); +} + +int write_sysfs_string(char *filename, char *basedir, char *val) +{ + return _write_sysfs_string(filename, basedir, val, 0); +} + +int read_sysfs_posint(char *filename, char *basedir) +{ + int ret; + FILE *sysfsfp; + char *temp = malloc(strlen(basedir) + strlen(filename) + 2); + + if (temp == NULL) { + printf("Memory allocation failed"); + return -ENOMEM; + } + sprintf(temp, "%s/%s", basedir, filename); + sysfsfp = fopen(temp, "r"); + if (sysfsfp == NULL) { + ret = -errno; + goto error_free; + } + fscanf(sysfsfp, "%d\n", &ret); + fclose(sysfsfp); +error_free: + free(temp); + return ret; +} + +int read_sysfs_float(char *filename, char *basedir, float *val) +{ + int ret = 0; + FILE *sysfsfp; + char *temp = malloc(strlen(basedir) + strlen(filename) + 2); + + if (temp == NULL) { + printf("Memory allocation failed"); + return -ENOMEM; + } + sprintf(temp, "%s/%s", basedir, filename); + sysfsfp = fopen(temp, "r"); + if (sysfsfp == NULL) { + ret = -errno; + goto error_free; + } + fscanf(sysfsfp, "%f\n", val); + fclose(sysfsfp); +error_free: + free(temp); + return ret; +} + +int read_sysfs_string(const char *filename, const char *basedir, char *str) +{ + int ret = 0; + FILE *sysfsfp; + char *temp = malloc(strlen(basedir) + strlen(filename) + 2); + + if (temp == NULL) { + printf("Memory allocation failed"); + return -ENOMEM; + } + sprintf(temp, "%s/%s", basedir, filename); + sysfsfp = fopen(temp, "r"); + if (sysfsfp == NULL) { + ret = -errno; + goto error_free; + } + fscanf(sysfsfp, "%s\n", str); + fclose(sysfsfp); +error_free: + free(temp); + return ret; +} + +#endif /* _IIO_UTILS_H */ diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.h b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.h new file mode 100644 index 000000000..1bc837b2d --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_cmp_sample/iio_utils.h @@ -0,0 +1,71 @@ +#ifndef _IIO_UTILS_H_ +#define _IIO_UTILS_H_ + +/* IIO - useful set of util functionality + * + * Copyright (c) 2008 Jonathan Cameron + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include + +/* Made up value to limit allocation sizes */ +#define IIO_MAX_NAME_LENGTH 30 + +#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements" +#define FORMAT_TYPE_FILE "%s_type" + +extern const char *iio_dir; + +/** + * struct iio_channel_info - information about a given channel + * @name: channel name + * @generic_name: general name for channel type + * @scale: scale factor to be applied for conversion to si units + * @offset: offset to be applied for conversion to si units + * @index: the channel index in the buffer output + * @bytes: number of bytes occupied in buffer output + * @mask: a bit mask for the raw output + * @is_signed: is the raw value stored signed + * @enabled: is this channel enabled + **/ +struct iio_channel_info { + char *name; + char *generic_name; + float scale; + float offset; + unsigned index; + unsigned bytes; + unsigned bits_used; + unsigned shift; + uint64_t mask; + unsigned be; + unsigned is_signed; + unsigned location; +}; + +int iioutils_break_up_name(const char *full_name, char **generic_name); +int iioutils_get_type(unsigned *is_signed, unsigned *bytes, + unsigned *bits_used, unsigned *shift, + uint64_t *mask, unsigned *be, + const char *device_dir, const char *name, + const char *generic_name); +int iioutils_get_param_float(float *output, const char *param_name, + const char *device_dir, const char *name, + const char *generic_name); +void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt); +int build_channel_array(const char *device_dir, + struct iio_channel_info **ci_array, int *counter); +int find_type_by_name(const char *name, const char *type); +int write_sysfs_int(char *filename, char *basedir, int val); +int write_sysfs_int_and_verify(char *filename, char *basedir, int val); +int write_sysfs_string_and_verify(char *filename, char *basedir, char *val); +int write_sysfs_string(char *filename, char *basedir, char *val); +int read_sysfs_posint(char *filename, char *basedir); +int read_sysfs_float(char *filename, char *basedir, float *val); +int read_sysfs_string(const char *filename, const char *basedir, char *str); + +#endif /* _IIO_UTILS_H_ */ diff --git a/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb b/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb index e854834b6..0167a33e3 100644 --- a/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb +++ b/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb @@ -37,6 +37,7 @@ RDEPENDS_${PN}_append_ccimx6ul = "\ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-bt", "", d)} \ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-btconfig", "", d)} \ dey-examples-adc \ + dey-examples-adc-cmp \ dey-examples-can \ dey-examples-cloudconnector \ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-hdp", "", d)} \