int atlsci_deinit()
{
mraa_i2c_stop(i2c_context);
i2c_context = NULL;
return ATLSCI_SUCCESS;
}
void bno055_close(bno055_context dev)
{
assert(dev != NULL);
bno055_uninstall_isr(dev);
if (dev->i2c)
mraa_i2c_stop(dev->i2c);
free(dev);
}
void ecezo_close(ecezo_context dev)
{
assert(dev != NULL);
if (dev->uart)
mraa_uart_stop(dev->uart);
if (dev->i2c)
mraa_i2c_stop(dev->i2c);
free(dev);
}
void kx122_close(kx122_context dev)
{
assert(dev != NULL);
kx122_uninstall_isr(dev,INT1);
kx122_uninstall_isr(dev,INT2);
if(dev->i2c){
mraa_i2c_stop(dev->i2c);
}
if(dev->spi){
mraa_spi_stop(dev->spi);
}
if(dev->chip_select){
mraa_gpio_close(dev->chip_select);
}
free(dev);
}
void lcm1602_close(lcm1602_context dev)
{
assert(dev != NULL);
if (dev->i2c)
mraa_i2c_stop(dev->i2c);
if (dev->gpioRS)
mraa_gpio_close(dev->gpioRS);
if (dev->gpioEN)
mraa_gpio_close(dev->gpioEN);
if (dev->gpioD0)
mraa_gpio_close(dev->gpioD0);
if (dev->gpioD1)
mraa_gpio_close(dev->gpioD1);
if (dev->gpioD2)
mraa_gpio_close(dev->gpioD2);
if (dev->gpioD3)
mraa_gpio_close(dev->gpioD3);
free(dev);
}
void
lis3dh_close(lis3dh_context dev)
{
assert(dev != NULL);
lis3dh_uninstall_isr(dev, LIS3DH_INTERRUPT_INT1);
lis3dh_uninstall_isr(dev, LIS3DH_INTERRUPT_INT2);
if (dev->i2c) {
mraa_i2c_stop(dev->i2c);
}
if (dev->spi) {
mraa_spi_stop(dev->spi);
}
if (dev->gpioCS) {
mraa_gpio_close(dev->gpioCS);
}
free(dev);
}
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) {
return MRAA_ERROR_NO_RESOURCES;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
fprintf(stderr, "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(stderr, "Could not write to i2c register. Status = %d\n", status);
goto i2c_set_exit;
}
i2c_set_exit:
mraa_i2c_stop(i2c);
return status;
}
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) {
return MRAA_ERROR_NO_RESOURCES;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
status = mraa_i2c_write_byte(i2c, register_address);
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
status = mraa_i2c_read(i2c, data, 1) == 1 ? MRAA_SUCCESS : MRAA_ERROR_UNSPECIFIED;
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
i2c_get_exit:
mraa_i2c_stop(i2c);
return status;
}
int main()
{
uint8_t event_type;
int exit_code;
mraa_init();
//Declaring opaque pointer to the internal struct_i2c
mraa_i2c_context i2c;
i2c = mraa_i2c_init(0);
//If no i2c connection is detected
if (i2c == NULL)
{
system("echo $(date) No I2C connection detected. >> log.txt");
return 0;
}
//Setting the i2c context address
mraa_i2c_address(i2c, I2C_ADDRESS);
//Reading a single byte from the i2c context.
event_type = mraa_i2c_read_byte(i2c);
if (event_type != -1)
{
if (event_type == 'A')
{
system("echo Entered event A >> log.txt");
}
else if (event_type == 'B')
{
system("echo Entered event B >> log.txt");
}
else
{
system("echo $(date) Wrong wake-up character received. >> log.txt");
}
//Waiting for one second to ensure program stability
sleep(1);
//Writing a single byte back to the i2c context
mraa_i2c_write_byte(i2c, 1);
//De-initializing the mraa_i2c_context device.
mraa_i2c_stop(i2c);
}
if (event_type == 'A' || event_type == 'B')
{
//Shutdown intel edison if program ran successfully.
system("shutdown -h now");
}
else
{
system("echo $(date) No data received!!!!! >> log.txt");
//De-initialize the mraa_i2c_context device
mraa_i2c_stop(i2c);
}
return 0;
}
/**
* Closes the I2c Bus used. This does not guarrantee the bus will not
* be usable by anyone else or communicates this disconnect to any
* slaves.
*/
~I2c() {
mraa_i2c_stop(m_i2c);
}
static void
i2c_close(mrb_state *mrb, void *p){
if (p != NULL){
mraa_i2c_stop((mraa_i2c_context)p);
}
}