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iio: iio consolidate read and write API

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Signed-off-by: Lay, Kuan Loon <kuan.loon.lay@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Lay, Kuan Loon
2015-11-04 18:08:15 +08:00
committed by Brendan Le Foll
parent 219632a1b8
commit edb7f8a215
3 changed files with 123 additions and 66 deletions
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37
api/mraa/iio.h
View File

@@ -42,8 +42,8 @@ typedef struct {
} mraa_iio_channel;
typedef struct {
char *name;
int enabled;
char* name;
int enabled;
} mraa_iio_event;
/**
@@ -91,28 +91,35 @@ mraa_iio_channel* mraa_iio_get_channels(mraa_iio_context dev);
int mraa_iio_get_channel_count(mraa_iio_context dev);
/**
*/
mraa_result_t mraa_iio_read(mraa_iio_context dev, const char* attribute, float* data);
mraa_result_t mraa_iio_read_float(mraa_iio_context dev, const char* filename, float* data);
/**
*
*/
mraa_result_t mraa_iio_write(mraa_iio_context dev, const char* attr_chan, const char* data);
mraa_result_t mraa_iio_read_integer(mraa_iio_context dev, const char* filename, int* data);
mraa_result_t mraa_iio_read_string(mraa_iio_context dev, const char* filename, char* data);
mraa_result_t mraa_iio_write_float(mraa_iio_context dev, const char* attr_chan, const float data);
mraa_result_t mraa_iio_write_integer(mraa_iio_context dev, const char* attr_chan, const int data);
mraa_result_t mraa_iio_write_string(mraa_iio_context dev, const char* attr_chan, const char* data);
mraa_result_t mraa_iio_get_channel_data(mraa_iio_context dev);
mraa_result_t mraa_iio_get_event_data(mraa_iio_context dev);
mraa_result_t mraa_iio_event_read(mraa_iio_context dev, const char* attribute, float* data);
mraa_result_t mraa_iio_event_write(mraa_iio_context dev, const char* attribute, const char* data);
mraa_result_t mraa_iio_event_poll(mraa_iio_context dev, struct iio_event_data* data);
mraa_result_t mraa_iio_event_setup_callback(mraa_iio_context dev, void (*fptr)(struct iio_event_data* data), void* args);
mraa_result_t
mraa_iio_event_setup_callback(mraa_iio_context dev, void (*fptr)(struct iio_event_data* data), void* args);
mraa_result_t mraa_iio_event_extract_event(struct iio_event_data* event, int* chan_type, int* modifier, int* type, int* direction, int* channel, int* channel2, int* different);
mraa_result_t mraa_iio_event_extract_event(struct iio_event_data* event,
int* chan_type,
int* modifier,
int* type,
int* direction,
int* channel,
int* channel2,
int* different);
/**
* De-inits an mraa_iio_context device
*

43
examples/iio_driver.c Executable file → Normal file
View File

@@ -26,14 +26,14 @@
#include "mraa/iio.h"
static void
printword(uint16_t input, mraa_iio_channel *chan)
printword(uint16_t input, mraa_iio_channel* chan)
{
int16_t res;
if (!chan->lendian) {
input = be16toh(input);
input = be16toh(input);
} else {
input = le16toh(input);
input = le16toh(input);
}
input >>= chan->shift;
@@ -43,7 +43,7 @@ printword(uint16_t input, mraa_iio_channel *chan)
} else {
res = input;
}
printf(" value = %05f\n", (float)res);
printf(" value = %05f\n", (float) res);
}
mraa_iio_context iio_device0;
@@ -60,13 +60,14 @@ interrupt(char* data)
printf("channel %d - bytes %d\n", channels[i].index, channels[i].bytes);
switch (channels[i].bytes) {
case 2:
printword(*(uint16_t *)(data + channels[i].location), &channels[i]);
printword(*(uint16_t*) (data + channels[i].location), &channels[i]);
}
}
}
}
void event_interrupt(struct iio_event_data* data)
void
event_interrupt(struct iio_event_data* data)
{
int chan_type;
int modifier;
@@ -77,7 +78,9 @@ void event_interrupt(struct iio_event_data* data)
int different;
mraa_iio_event_extract_event(data, &chan_type, &modifier, &type, &direction, &channel, &channel2, &different);
printf("event time %lld id %lld extracted chan_type %d modifier %d type %d direction %d channel %d channel2 %d different %d\n", data->timestamp, data->id, chan_type, modifier, type, direction, channel, channel2, different);
printf("event time %lld id %lld extracted chan_type %d modifier %d type %d direction %d "
"channel %d channel2 %d different %d\n",
data->timestamp, data->id, chan_type, modifier, type, direction, channel, channel2, different);
}
int
@@ -89,10 +92,28 @@ main()
return EXIT_FAILURE;
}
float iio_value;
mraa_result_t ret = mraa_iio_read(iio_device0, "in_voltage0_raw", &iio_value);
float iio_float;
int iio_integer;
mraa_result_t ret;
ret = mraa_iio_write_float(iio_device0, "in_accel_scale", 0.019163);
if (ret == MRAA_SUCCESS) {
fprintf(stdout, "IIO read %f\n", iio_value);
fprintf(stdout, "IIO write success\n");
}
ret = mraa_iio_read_float(iio_device0, "in_accel_scale", &iio_float);
if (ret == MRAA_SUCCESS) {
fprintf(stdout, "IIO read %f\n", iio_float);
}
ret = mraa_iio_write_integer(iio_device0, "scan_elements/in_accel_x_en", 1);
if (ret == MRAA_SUCCESS) {
fprintf(stdout, "IIO write success\n", iio_integer);
}
ret = mraa_iio_read_integer(iio_device0, "scan_elements/in_accel_x_en", &iio_integer);
if (ret == MRAA_SUCCESS) {
fprintf(stdout, "IIO read %d\n", iio_integer);
}
if (mraa_iio_trigger_buffer(iio_device0, interrupt, NULL) == MRAA_SUCCESS) {
@@ -106,7 +127,7 @@ main()
if (iio_device6 == NULL) {
return EXIT_FAILURE;
}
mraa_iio_event_write(iio_device6, "in_proximity2_thresh_either_en", "1");
mraa_iio_write_integer(iio_device6, "events/in_proximity2_thresh_either_en", 1);
// Blocking until event fired

109
src/iio/iio.c
View File

@@ -203,27 +203,84 @@ mraa_iio_get_device_num_by_name(const char* name)
}
mraa_result_t
mraa_iio_read(mraa_iio_context dev, const char* attr_chan, float* data)
mraa_iio_read_float(mraa_iio_context dev, const char* filename, float* data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, attr_chan);
int fd = open(buf, O_RDONLY);
if (fd != -1) {
int len = read(fd, &buf, MAX_SIZE);
*data = strtol(buf, NULL, 10);
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "r");
if (fp != NULL) {
fscanf(fp, "%f\n", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_write(mraa_iio_context dev, const char* attr_chan, const char* data)
mraa_iio_read_integer(mraa_iio_context dev, const char* filename, int* data)
{
char buf[128];
snprintf(buf, 128, IIO_SYSFS_DEVICE "%d/%s", dev->num, attr_chan);
int fd = open(buf, O_WRONLY);
if (fd != -1) {
write(fd, data, (strlen(data) + 1));
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "r");
if (fp != NULL) {
fscanf(fp, "%d\n", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_read_string(mraa_iio_context dev, const char* filename, char* data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "r");
if (fp != NULL) {
fscanf(fp, "%s\n", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_write_float(mraa_iio_context dev, const char* filename, const float data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "w");
if (fp != NULL) {
fprintf(fp, "%f", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_write_integer(mraa_iio_context dev, const char* filename, const int data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "w");
if (fp != NULL) {
fprintf(fp, "%d", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_write_string(mraa_iio_context dev, const char* filename, const char* data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/%s", dev->num, filename);
FILE* fp = fopen(buf, "w");
if (fp != NULL) {
fprintf(fp, "%s", data);
fclose(fp);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
@@ -351,34 +408,6 @@ mraa_iio_get_event_data(mraa_iio_context dev)
return MRAA_SUCCESS;
}
mraa_result_t
mraa_iio_event_read(mraa_iio_context dev, const char* attribute, float* data)
{
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS "/%s", dev->num, attribute);
int fd = open(buf, O_RDONLY);
if (fd != -1) {
int len = read(fd, &buf, MAX_SIZE);
*data = strtol(buf, NULL, 10);
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
mraa_result_t
mraa_iio_event_write(mraa_iio_context dev, const char* attribute, const char* data)
{
int len;
char buf[MAX_SIZE];
snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS "/%s", dev->num, attribute);
int fd = open(buf, O_WRONLY);
if (fd != -1) {
int len = write(fd, data, (strlen(data) + 1));
return MRAA_SUCCESS;
}
return MRAA_ERROR_UNSPECIFIED;
}
static mraa_result_t
mraa_iio_event_poll_nonblock(int fd, struct iio_event_data* data)
{