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examples: cleanup examples directory

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Following changes are done as a part of cleanup:

1. Moved the platform specific `C` examples from top level examples/
directory to platform/ subdirectory and renamed helloedison.c to
gpio_edison.c

2. C specific examples are moved to a new c/ subdirectory. As a part
of this process, examples are modified to follow same standards
and few new examples are also added.

3. Include the newly added C examples to relevant API documentation

4. Ran clang-format for all source files in c/, c++/, platform/
subdirectories

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Manivannan Sadhasivam
2017-11-17 17:22:34 +05:30
committed by Brendan Le Foll
parent 3fb65de4b8
commit e562c774cf
46 changed files with 1542 additions and 1025 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
examples/platform/CMakeLists.txt Normal file
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add_executable (gpio_edison gpio_edison.c)
target_link_libraries (gpio_edison mraa)
include_directories(${PROJECT_SOURCE_DIR}/api)
include_directories(${PROJECT_SOURCE_DIR}/api/mraa)
if (FIRMATA)
add_executable (firmata_curie_imu firmata_curie_imu.c)
add_executable (i2c_firmata i2c_firmata.c)
target_link_libraries (firmata_curie_imu mraa)
target_link_libraries (i2c_firmata mraa)
endif()

92
examples/platform/firmata_curie_imu.c Normal file
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/*
* Author: Brendan Le Foll
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include "mraa.h"
#include "mraa/firmata.h"
#define FIRMATA_START_SYSEX 0xF0
#define FIRMATA_END_SYSEX 0xF7
#define FIRMATA_CURIE_IMU 0x11
#define FIRMATA_CURIE_IMU_READ_ACCEL 0x00
void
interrupt(uint8_t* buf, int length)
{
printf("reg read returned: %d, with buffer size %d\n", ((buf[6] & 0x7f) | ((buf[7] & 0x7f) << 7)), length);
}
int
main()
{
mraa_init();
//! [Interesting]
/**
* This example reads from the FirmataCurieIMU plugin
*/
mraa_add_subplatform(MRAA_GENERIC_FIRMATA, "/dev/ttyACM0");
mraa_firmata_context firm = mraa_firmata_init(FIRMATA_CURIE_IMU);
if (firm == NULL) {
return EXIT_FAILURE;
}
mraa_firmata_response(firm, interrupt);
char* buffer = calloc(4, 0);
if (buffer == NULL) {
free(firm);
return EXIT_FAILURE;
}
buffer[0] = FIRMATA_START_SYSEX;
buffer[1] = FIRMATA_CURIE_IMU;
buffer[2] = FIRMATA_CURIE_IMU_READ_ACCEL;
buffer[3] = FIRMATA_END_SYSEX;
mraa_firmata_write_sysex(firm, buffer, 4);
sleep(1);
// stop the isr and set it again
mraa_firmata_response_stop(firm);
mraa_firmata_response(firm, interrupt);
mraa_firmata_write_sysex(firm, buffer, 4);
sleep(1);
// close everything and try again
mraa_firmata_close(firm);
firm = mraa_firmata_init(FIRMATA_CURIE_IMU);
mraa_firmata_response(firm, interrupt);
mraa_firmata_write_sysex(firm, buffer, 4);
sleep(10);
mraa_firmata_close(firm);
//! [Interesting]
return EXIT_SUCCESS;
}

69
examples/platform/gpio_edison.c Normal file
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/*
* Author: Brendan Le Foll <brendan.le.foll@intel.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
//! [Interesting]
#include "mraa.h"
int
main(int argc, char** argv)
{
mraa_result_t ret = MRAA_SUCCESS;
mraa_platform_t platform_type = mraa_get_platform_type();
if (platform_type != MRAA_INTEL_EDISON_FAB_C) {
fprintf(stderr, "Error: This program can only run on an edison\n");
ret = MRAA_ERROR_INVALID_PLATFORM;
goto end;
}
// MRAA_INTEL_EDISON_GP182 == 0 so this will initialise pin0 on arduino
// which is hardware gpio 130 and not 182
mraa_gpio_context gpio182 = mraa_gpio_init(MRAA_INTEL_EDISON_GP182);
if (gpio182 == NULL) {
fprintf(stderr, "Error: Failed to open gpio182\n");
ret = MRAA_ERROR_INVALID_PLATFORM;
goto end;
}
mraa_gpio_dir(gpio182, MRAA_GPIO_OUT);
// we set the owner to false here, this makes sure that we do not close the
// gpio from sysfs in mraa_gpio_close meaning it will stay as an output and
// we will not always transition from 0->1 as gpio182 as output has the
// default position of '0'. Note that the value could change as a result of
// a mraa_gpio_dir however meaning we always go from 0->1 or 1->0
mraa_gpio_owner(gpio182, false);
int val = mraa_gpio_read(gpio182);
printf("GPIO%d (mraa pin %d) was: %d, will set to %d\n", 182, mraa_gpio_get_pin(gpio182), val, !val);
mraa_gpio_write(gpio182, !val);
mraa_gpio_close(gpio182);
end:
mraa_deinit();
return ret;
}
//! [Interesting]

63
examples/platform/i2c_firmata.c Normal file
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/*
* Author: Brendan Le Foll <brendan.le.foll@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "mraa.h"
int
main(int argc, char** argv)
{
mraa_init();
mraa_add_subplatform(MRAA_GENERIC_FIRMATA, "/dev/ttyACM0");
mraa_i2c_context i2c;
i2c = mraa_i2c_init(0 + 512);
#if 0
mraa_i2c_address(i2c, 0x62);
#if 1
uint8_t rx_tx_buf[2];
rx_tx_buf[0] = 0x0;
rx_tx_buf[1] = 0x0;
mraa_i2c_write(i2c, rx_tx_buf, 2);
#endif
//mraa_i2c_write_byte_data(i2c, 0x0, 0x0);
mraa_i2c_write_byte_data(i2c, 0x0, 0x1);
mraa_i2c_write_byte_data(i2c, 0xFF, 0x08);
mraa_i2c_write_byte_data(i2c, 0x00, 0x04);
mraa_i2c_write_byte_data(i2c, 0xA0, 0x02);
#else
mraa_i2c_address(i2c, 0x77);
int res = mraa_i2c_read_byte_data(i2c, 0xd0);
printf("res is 0x%x\n", res);
uint8_t data[2];
mraa_i2c_write_byte(i2c, 0x77);
mraa_i2c_read(i2c, data, 1);
res = mraa_i2c_read_word_data(i2c, 0xAA); // BMP085_CAL_AC1
printf("res is %d\n", res);
#endif
sleep(10);
}

75
examples/platform/initio.c Normal file
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@@ -0,0 +1,75 @@
/*
* Author: Houman Brinjcargorabi <houman.brinjcargorabi@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Example usage: Demonstrates how to initialize and close different
* peripherals
*/
/* standard headers */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* mraa header */
#include "mraa.h"
int
main()
{
// GPIO-PIN
mraa_gpio_context gpio = (mraa_gpio_context) init_io("gpio-1");
// GPIO-RAW-RAWPIN
mraa_gpio_context gpioraw = (mraa_gpio_context) init_io("gpio-raw-131");
// AIO-PIN
mraa_aio_context aio = (mraa_aio_context) init_io("aio-0");
// PWM-PIN
mraa_pwm_context pwm = (mraa_pwm_context) init_io("pwm-6");
// PWM-RAW-CHIPID-PIN
mraa_pwm_context pwmraw = (mraa_pwm_context) init_io("pwm-raw-0,1");
// UART-INDEX: the index is the one represented internally in the uart_dev array
mraa_uart_context uart = (mraa_uart_context) init_io("uart-1");
// UART-RAW-PATH
mraa_uart_context uartraw = (mraa_uart_context) init_io("uart-raw-/dev/ttyS0");
// SPI-INDEX: same as UART
mraa_spi_context spi = (mraa_spi_context) init_io("spi-0");
// SPI-RAW-BUS-CS: USED to open and use /dev/spidev<BUS>.<CS>
mraa_spi_context spiraw = (mraa_spi_context) init_io("spi-raw-0-1");
// I2C-INDEX: same as UART
mraa_i2c_context i2c = (mraa_i2c_context) init_io("i2c-0");
// I2C-RAW-BUS
mraa_i2c_context i2craw = (mraa_i2c_context) init_io("i2c-raw-0");
// FREE STUFF
mraa_gpio_close(gpio);
mraa_gpio_close(gpioraw);
mraa_aio_close(aio);
mraa_pwm_close(pwm);
mraa_pwm_close(pwmraw);
mraa_uart_close(uart);
mraa_uart_close(uartraw);
mraa_spi_close(spi);
mraa_spi_close(spiraw);
mraa_i2c_close(i2c);
mraa_i2c_close(i2craw);
}