Raspberries/mraa
Private
Public Access
2
0
Fork 0
Code Activity

examples: Created mraa-i2c tool for i2c layer testing.

Browse Source 
Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Henry Bruce
2015-05-29 17:21:47 -07:00
committed by Brendan Le Foll
parent 8f48df0533
commit 6dfe6ff6bc
2 changed files with 254 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
examples/CMakeLists.txt
View File

@@ -10,9 +10,13 @@ add_executable (mmap-io2 mmap-io2.c)
add_executable (blink_onboard blink_onboard.c)
add_executable (uart uart.c)
add_executable (mraa-gpio mraa-gpio.c)
add_executable (mraa-i2c mraa-i2c.c)
add_executable (spi_max7219 spi_max7219.c)
include_directories(${PROJECT_SOURCE_DIR}/api)
# FIXME Hack to access internal types used by mraa-i2c
include_directories(${PROJECT_SOURCE_DIR}/include)
include_directories(${PROJECT_SOURCE_DIR}/api/mraa)
target_link_libraries (hellomraa mraa)
target_link_libraries (i2c_HMC5883L mraa m)
@@ -26,6 +30,7 @@ target_link_libraries (mmap-io2 mraa)
target_link_libraries (blink_onboard mraa)
target_link_libraries (uart mraa)
target_link_libraries (mraa-gpio mraa)
target_link_libraries (mraa-i2c mraa)
target_link_libraries (spi_max7219 mraa)
add_subdirectory (c++)

249
examples/mraa-i2c.c Normal file
View File

@@ -0,0 +1,249 @@
/*
* Author: Henry Bruce <henry.bruce@intel.com>
* Copyright (c) 2014 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mraa/i2c.h"
#include "mraa_internal_types.h"
extern mraa_board_t* plat;
void
print_version()
{
fprintf(stdout, "Version %s on %s", mraa_get_version(), mraa_get_platform_name());
if (plat != NULL && plat->sub_platform != NULL)
fprintf(stdout, " with %s", plat->sub_platform->platform_name);
fprintf(stdout, "\n");
}
void
print_help()
{
fprintf(stdout, "version Get mraa version and board name\n");
fprintf(stdout, "list List available busses\n");
fprintf(stdout, "detect bus List detected devices on specified bus\n");
fprintf(stdout, "get bus device reg Get value from specified device register\n");
fprintf(stdout, "set bus device reg value Set specified device register to value\n");
}
void
print_command_error()
{
fprintf(stdout, "Invalid command, options are:\n");
print_help();
}
void
print_bus(mraa_board_t* board)
{
int bus_index;
int bus;
for (bus = 0; bus < board->i2c_bus_count; ++bus) {
char* busType;
switch (mraa_get_platform_type()) {
case MRAA_INTEL_GALILEO_GEN1:
case MRAA_INTEL_GALILEO_GEN2:
case MRAA_INTEL_EDISON_FAB_C:
case MRAA_INTEL_DE3815:
case MRAA_INTEL_MINNOWBOARD_MAX:
case MRAA_RASPBERRY_PI:
case MRAA_BEAGLEBONE:
case MRAA_BANANA:
bus_index = bus;
busType = "stdapi";
break;
case MRAA_FTDI_FT4222:
busType = "ft4222";
bus_index = MRAA_USE_SUB_PLATFORM(bus);
break;
default:
busType = "unknown";
break;
}
fprintf(stdout, "Bus %2d: id=%02d type=%s ", bus_index, plat->i2c_bus[bus].bus_id, busType);
if (bus == plat->def_i2c_bus)
fprintf(stdout, " default", bus);
fprintf(stdout, "\n", bus);
}
}
void
print_busses()
{
print_bus(plat);
if (plat->sub_platform != NULL)
print_bus(plat->sub_platform);
}
mraa_result_t
i2c_get(int bus, uint8_t device_address, uint8_t register_address, uint8_t* data)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
if (i2c == NULL) {
status = MRAA_ERROR_NO_RESOURCES;
// fprintf(stdout, "Could not initialize i2c\n");
goto i2c_get_exit;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
// fprintf(stdout, "Could not set i2c device address\n");
goto i2c_get_exit;
}
status = mraa_i2c_write_byte(i2c, register_address);
if (status != MRAA_SUCCESS) {
// fprintf(stdout, "Could not set i2c register address. Status = %d\n", status);
goto i2c_get_exit;
}
status = mraa_i2c_read(i2c, data, 1) == 1 ? MRAA_SUCCESS : MRAA_ERROR_UNSPECIFIED;
if (status != MRAA_SUCCESS) {
// fprintf(stdout, "i2c read failed\n");
goto i2c_get_exit;
}
i2c_get_exit:
if (i2c != NULL)
mraa_i2c_stop(i2c);
return status;
}
mraa_result_t
i2c_set(int bus, uint8_t device_address, uint8_t register_address, uint8_t data)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
if (i2c == NULL) {
status = MRAA_ERROR_NO_RESOURCES;
fprintf(stdout, "Could not initialize i2c\n");
goto i2c_set_exit;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
fprintf(stdout, "Could not set i2c device address\n");
goto i2c_set_exit;
}
status = mraa_i2c_write_byte_data(i2c, data, register_address);
if (status != MRAA_SUCCESS) {
fprintf(stdout, "Could not write to i2c register. Status = %d\n", status);
goto i2c_set_exit;
}
/*
status = mraa_i2c_write_byte(i2c, data);
if (status != MRAA_SUCCESS) {
fprintf(stdout, "Could not set value. Status = %d\n", status);
goto i2c_set_exit;
}
*/
i2c_set_exit:
if (i2c != NULL)
mraa_i2c_stop(i2c);
return status;
}
void i2c_detect_devices(int bus)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
int addr;
for (addr=0x0; addr < 0x80; ++addr) {
uint8_t value;
if ((addr) % 16 == 0)
printf("%02x: ", addr);
if (i2c_get(bus, addr, 0, &value) == MRAA_SUCCESS)
printf("%02x ", addr);
else
printf("-- ", addr);
if ((addr + 1) % 16 == 0)
printf("\n");
}
}
int
main(int argc, char** argv)
{
mraa_set_log_level(7);
if (argc == 1) {
print_command_error();
}
if (argc > 1) {
if (strcmp(argv[1], "help") == 0) {
print_help();
} else if (strcmp(argv[1], "version") == 0) {
print_version();
} else if (strcmp(argv[1], "list") == 0) {
print_busses();
} else if (strcmp(argv[1], "detect") == 0) {
if (argc == 3) {
int bus = strtol(argv[2], NULL, 0);
i2c_detect_devices(bus);
} else {
print_command_error();
}
} else if ((strcmp(argv[1], "get") == 0)) {
if (argc == 5) {
int bus = strtol(argv[2], NULL, 0);
uint8_t device_address = strtol(argv[3], NULL, 0);
uint8_t register_address = strtol(argv[4], NULL, 0);
// fprintf(stdout, "Device %02X, Register = %02X\n", device_address, register_address);
uint8_t data;
if (i2c_get(bus, device_address, register_address, &data) == MRAA_SUCCESS) {
fprintf(stdout, "Register %#02X = %#02X\n", register_address, data);
} else {
fprintf(stdout, "i2c get failed\n");
}
} else {
print_command_error();
}
} else if ((strcmp(argv[1], "set") == 0)) {
if (argc == 6) {
int bus = strtol(argv[2], NULL, 0);
uint8_t device_address = strtol(argv[3], NULL, 0);
uint8_t register_address = strtol(argv[4], NULL, 0);
uint8_t value = strtol(argv[5], NULL, 0);
fprintf(stdout, "Device %02X, Register = %02X, Value = %02X\n", device_address, register_address, value);
if (i2c_set(bus, device_address, register_address, value) != MRAA_SUCCESS) {
fprintf(stdout, "i2c set failed\n");
}
} else {
print_command_error();
}
}
}
return 0;
}