From cf3f88f03c016f0c3fece3b1d9ec42e69896acad Mon Sep 17 00:00:00 2001 From: Pedro Perez de Heredia Date: Mon, 28 Nov 2016 18:45:20 +0100 Subject: [PATCH] dey-examples: add adc_sample application for ccimx6ul https://jira.digi.com/browse/DEL-3218 Signed-off-by: Pedro Perez de Heredia --- .../dey-examples/dey-examples-adc.bb | 16 + .../dey-examples/files/adc_sample/Makefile | 11 + .../files/adc_sample/adc_sample.c | 337 +++++++++ .../dey-examples/files/adc_sample/iio_utils.c | 669 ++++++++++++++++++ .../dey-examples/files/adc_sample/iio_utils.h | 71 ++ .../packagegroup-dey-examples.bb | 1 + 6 files changed, 1105 insertions(+) create mode 100644 meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc.bb create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/Makefile create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/adc_sample.c create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/iio_utils.c create mode 100644 meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/iio_utils.h diff --git a/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc.bb b/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc.bb new file mode 100644 index 000000000..4067bdbac --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/dey-examples-adc.bb @@ -0,0 +1,16 @@ +SUMMARY = "DEY examples: ADC test application" +SECTION = "examples" +LICENSE = "GPL-2.0" +LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6" + +SRC_URI = "file://adc_sample" + +S = "${WORKDIR}/adc_sample" + +do_install() { + install -d ${D}${bindir} + install -m 0755 adc_sample ${D}${bindir} +} + +PACKAGE_ARCH = "${MACHINE_ARCH}" +COMPATIBLE_MACHINE = "(ccimx6ul)" diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/Makefile b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/Makefile new file mode 100644 index 000000000..c4193844b --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/Makefile @@ -0,0 +1,11 @@ +CFLAGS = -Wall -g -D_GNU_SOURCE + +all: adc_sample + +adc_sample: adc_sample.o iio_utils.o + +%.o: %.c iio_utils.h + +.PHONY: clean +clean: + rm -f *.o adc_sample diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/adc_sample.c b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/adc_sample.c new file mode 100644 index 000000000..a0dbfef07 --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/adc_sample.c @@ -0,0 +1,337 @@ +/* + * ConnectCore 6UL ADC sample application. + * + * Copyright (c) 2016 Digi International Inc. + * All rights reserved. + * + * Partially 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 "iio_utils.h" + +#define ARRAY_SIZE(v) (sizeof(v) / sizeof((v)[0])) +#define BUFFER_LEN 20 + +#define ADC_SAMPLE_USAGE \ + "Usage:\n" \ + "adc_sample -t ADC_type -c channel [options]\n\n" + +#define ADC_SAMPLE_FULL_USAGE \ + "Usage:\n" \ + "adc_sample -t ADC_type -c channel [options]\n\n" \ + "Options:\n" \ + " -t : ADC_type ('MX6UL', 'MCA')\n" \ + " -c : channel number to read from\n" \ + " -n : Number of samples (default: 1)\n" \ + " -d : Delay (in ms) between samples (default: 1000)\n" \ + " -v : Show output in V (otherwise raw ADC value is shown)\n" \ + " -h : help\n\n" + +enum adc_type { + ADC_TYPE_UNKNOWN, + ADC_TYPE_MX6UL, + ADC_TYPE_MCA +}; + +struct adc_data { + enum adc_type type; + const char *name; + const char *dev_name; + unsigned int nbits; +}; + +struct adc_data adc_list[] = { + { + .type = ADC_TYPE_MX6UL, + .name = "MX6UL", + .dev_name = "2198000.adc", + .nbits = 12, + }, { + .type = ADC_TYPE_MCA, + .name = "MCA", + .dev_name = "mca-cc6ul-adc", + .nbits = 12, + } +}; + +typedef struct adc { + struct adc_data *data; + char *chrdev_name; + char *sysfs_file; + char *sysfs_dir; + int dev_num; + unsigned long channel; + double voltage_scale; +} adc_t; + +static void show_usage(int full) +{ + fprintf(stdout, "%s", full ? + ADC_SAMPLE_FULL_USAGE : ADC_SAMPLE_USAGE); +} + +static struct adc_data *get_adc_data(const char *type_str) +{ + struct adc_data *data = NULL; + int i; + + for (i = 0; i < ARRAY_SIZE(adc_list); i++) { + if (!strcmp(adc_list[i].name, type_str)) { + data = &adc_list[i]; + break; + } + } + + return data; +} + +static int read_adc_sample_sysfs(adc_t *adc, long int *val) +{ + int fd, ret; + char buffer[BUFFER_LEN]; + + fd = open(adc->sysfs_file, O_RDONLY); + if (fd < 0) { + fprintf(stdout, "%s: failed to open %s\n", + __func__, adc->sysfs_file); + ret = fd; + goto just_ret; + } + + ret = read(fd, buffer, BUFFER_LEN); + if (ret < 0) { + fprintf(stdout, "%s: failed to read ADC sample from %s (%d)\n", + __func__, adc->sysfs_file, ret); + goto close_ret; + } + + if (ret == 0) { + fprintf(stdout, "%s: no data available in %s\n", + __func__, adc->sysfs_file); + ret = -ENODATA; + goto close_ret; + } + + *val = strtol(buffer, NULL, 10); + ret = 0; + +close_ret: + close(fd); +just_ret: + return ret; +} + +static int read_voltage_scale(adc_t *adc, double *val) +{ + int fd, ret; + char buffer[BUFFER_LEN]; + char *temp; + + /* Read the voltage scale from the sysfs */ + ret = asprintf(&temp, "%s/in_voltage_scale", adc->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 voltage scale from %s (%d)\n", + __func__, temp, ret); + goto close_fd; + } + + if (ret == 0) { + fprintf(stdout, "%s: no data available in %s\n", __func__, temp); + ret = -ENODATA; + goto close_fd; + } + + *val = atof(buffer); + +close_fd: + close(fd); +free_temp: + free(temp); + return ret; +} + +int main(int argc, char **argv) +{ + adc_t *adc; + unsigned long nsamples = 1; + unsigned long delay_ms = 1000; + long sample_val; + bool raw = true; + int ret, opt, i; + + if (argc <= 2) { + show_usage(0); + return EXIT_FAILURE; + } + + adc = malloc(sizeof(adc_t)); + if (!adc) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto error_ret; + } + memset(adc, 0, sizeof(adc_t)); + + adc->channel = ~0; + + while ((opt = getopt(argc, argv, "t:n:d:c:vh")) > 0) { + switch (opt) { + case 't': + adc->data = get_adc_data(optarg); + if (!adc->data) { + fprintf(stdout, "Unknown ADC type %s\n", optarg); + show_usage(0); + ret = EXIT_FAILURE; + goto error_ret2; + } + break; + + case 'n': + nsamples = strtoul(optarg, NULL, 10); + if (!nsamples) { + fprintf(stdout, + "Invalid number of samples parameter (%s)\n", + optarg); + show_usage(0); + ret = EXIT_FAILURE; + goto error_ret2; + } + break; + + case 'd': + delay_ms = strtoul(optarg, NULL, 10); + if (!delay_ms) { + fprintf(stdout, + "Invalid inter sample delay parameter (%s)\n", + optarg); + show_usage(0); + ret = EXIT_FAILURE; + goto error_ret2; + } + break; + + case 'c': + adc->channel = strtoul(optarg, NULL, 10); + break; + + case 'v': + raw = false; + break; + + case 'h': + show_usage(1); + return EXIT_SUCCESS; + + default: + show_usage(0); + return EXIT_FAILURE; + } + } + + /* Check that the application params provide what we need */ + if (!adc->data || adc->data->type == ADC_TYPE_UNKNOWN) { + fprintf(stdout, "ADC type must be provided\n"); + show_usage(1); + ret = EXIT_FAILURE; + goto error_ret2; + } + + if (adc->channel == ~0) { + fprintf(stdout, "ADC channel must be provided\n"); + show_usage(1); + ret = EXIT_FAILURE; + goto error_ret2; + } + + adc->dev_num = find_type_by_name(adc->data->dev_name, "iio:device"); + if (adc->dev_num < 0) { + fprintf(stdout, "Failed to find iio:device for %s\n", + adc->data->dev_name); + ret = -ENODEV; + goto error_ret2; + } + ret = asprintf(&adc->chrdev_name, "/dev/iio:device%d", adc->dev_num); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto error_ret2; + } + + ret = asprintf(&adc->sysfs_dir, "/sys/bus/iio/devices/iio:device%d", + adc->dev_num); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto error_ret3; + } + + ret = asprintf(&adc->sysfs_file, "%s/in_voltage%lu_raw", + adc->sysfs_dir, adc->channel); + if (ret < 0) { + fprintf(stdout, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto error_ret4; + } + + if (!raw) { + ret = read_voltage_scale(adc, &adc->voltage_scale); + if (ret < 0) { + goto error_ret5; + } + } + + for (i = 0; i < nsamples; i++) { + ret = read_adc_sample_sysfs(adc, &sample_val); + if (ret) + break; + + if (raw) { + fprintf(stdout, "Sample %i: 0x%04x\n", + i, (unsigned int)sample_val); + } else { + fprintf(stdout, "Sample %i: %.2f V\n", + i, sample_val * adc->voltage_scale / 1000); + } + + usleep(delay_ms * 1000); + } + +error_ret5: + free(adc->sysfs_file); +error_ret4: + free(adc->sysfs_dir); +error_ret3: + free(adc->chrdev_name); +error_ret2: + free(adc); +error_ret: + return ret; +} diff --git a/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/iio_utils.c b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/iio_utils.c new file mode 100644 index 000000000..6f6452167 --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_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_sample/iio_utils.h b/meta-digi-dey/recipes-digi/dey-examples/files/adc_sample/iio_utils.h new file mode 100644 index 000000000..1bc837b2d --- /dev/null +++ b/meta-digi-dey/recipes-digi/dey-examples/files/adc_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 51e45b619..c7147fb14 100644 --- a/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb +++ b/meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb @@ -38,6 +38,7 @@ RDEPENDS_${PN}_append_ccimx6 = "\ 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-can \ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-hdp", "", d)} \ dey-examples-tamper \