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usb-serial-for-android: Implementation

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Implement the libdivecomputer API in Java and create C/JNI translation
layer.

[Dirk Hohndel: whitespace harmonization - yes, some of this is Java,
               this still makes it much easier to read for me;
               also changed the FTDI conditional compilation to make
               sure we can still use that for mobile-on-desktop if
               necessary]

Signed-off-by: Christof Arnosti <charno@charno.ch>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Christof Arnosti 2020-03-05 22:38:33 +01:00 • committed by Dirk Hohndel
parent 6ffb1e3129
commit 6e38f85ba7
7 changed files with 512 additions and 9 deletions
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197
core/serial_usb_android.cpp Normal file
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#include "libdivecomputer.h"
#include <libdivecomputer/context.h>
#include <libdivecomputer/custom.h>
#include <cstring>
#include <QAndroidJniObject>
#include <QAndroidJniEnvironment>
#include <thread>
#include <android/log.h>
#define INFO(context, fmt, ...) __android_log_print(ANDROID_LOG_DEBUG, __FILE__, "INFO: " fmt "\n", ##__VA_ARGS__)
#define ERROR(context, fmt, ...) __android_log_print(ANDROID_LOG_DEBUG, __FILE__, "ERROR: " fmt "\n", ##__VA_ARGS__)
#define TRACE INFO
static dc_status_t serial_usb_android_sleep(void *io, unsigned int timeout)
{
TRACE (device->context, "%s: %i", __FUNCTION__, timeout);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_INVALIDARGS;
std::this_thread::sleep_for(std::chrono::milliseconds(timeout));
return DC_STATUS_SUCCESS;
}
static dc_status_t serial_usb_android_set_timeout(void *io, int timeout)
{
TRACE (device->context, "%s: %i", __FUNCTION__, timeout);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_INVALIDARGS;
return static_cast<dc_status_t>(device->callMethod<jint>("set_timeout", "(I)I", timeout));
}
static dc_status_t serial_usb_android_set_dtr(void *io, unsigned int value)
{
TRACE (device->context, "%s: %i", __FUNCTION__, value);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_INVALIDARGS;
return static_cast<dc_status_t>(device->callMethod<jint>("set_dtr", "(Z)I", value));
}
static dc_status_t serial_usb_android_set_rts(void *io, unsigned int value)
{
TRACE (device->context, "%s: %i", __FUNCTION__, value);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_INVALIDARGS;
return static_cast<dc_status_t>(device->callMethod<jint>("set_rts", "(Z)I", value));
}
static dc_status_t serial_usb_android_close(void *io)
{
TRACE (device->context, "%s", __FUNCTION__);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_SUCCESS;
auto retval = static_cast<dc_status_t>(device->callMethod<jint>("close", "()I"));
delete device;
return retval;
}
static dc_status_t serial_usb_android_purge(void *io, dc_direction_t direction)
{
TRACE (device->context, "%s: %i", __FUNCTION__, direction);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == nullptr)
return DC_STATUS_INVALIDARGS;
return static_cast<dc_status_t>(device->callMethod<jint>("purge", "(I)I", direction));
}
static dc_status_t
serial_usb_android_configure(void *io, unsigned int baudrate, unsigned int databits, dc_parity_t parity,
dc_stopbits_t stopbits, dc_flowcontrol_t flowcontrol)
{
TRACE (device->context, "%s: baudrate=%i, databits=%i, parity=%i, stopbits=%i, flowcontrol=%i", __FUNCTION__,
baudrate, databits, parity, stopbits, flowcontrol);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == NULL)
return DC_STATUS_INVALIDARGS;
return static_cast<dc_status_t>(device->callMethod<jint>("configure", "(IIII)I", baudrate, databits, parity, stopbits));
}
/*
static dc_status_t serial_usb_android_get_available (void *io, size_t *value)
{
INFO (device->context, "%s", __FUNCTION__);
QAndroidJniObject *device = static_cast<QAndroidJniObject*>(io);
if (device == NULL)
return DC_STATUS_INVALIDARGS;
auto retval = device->callMethod<jint>("get_available", "()I");
if(retval < 0){
INFO (device->context, "Error in %s, retval %i", __FUNCTION__, retval);
return static_cast<dc_status_t>(retval);
}
*value = retval;
return DC_STATUS_SUCCESS;
}
*/
static dc_status_t serial_usb_android_read(void *io, void *data, size_t size, size_t *actual)
{
TRACE (device->context, "%s: size: %i", __FUNCTION__, size);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == NULL)
return DC_STATUS_INVALIDARGS;
QAndroidJniEnvironment env;
jbyteArray array = env->NewByteArray(size);
env->SetByteArrayRegion(array, 0, size, (const jbyte *) data);
auto retval = device->callMethod<jint>("read", "([B)I", array);
if (retval < 0) {
env->DeleteLocalRef(array);
INFO (device->context, "Error in %s, retval %i", __FUNCTION__, retval);
return static_cast<dc_status_t>(retval);
}
*actual = retval;
env->GetByteArrayRegion(array, 0, retval, (jbyte *) data);
env->DeleteLocalRef(array);
TRACE (device->context, "%s: actual read size: %i", __FUNCTION__, retval);
return DC_STATUS_SUCCESS;
}
static dc_status_t serial_usb_android_write(void *io, const void *data, size_t size, size_t *actual)
{
TRACE (device->context, "%s: size: %i", __FUNCTION__, size);
QAndroidJniObject *device = static_cast<QAndroidJniObject *>(io);
if (device == NULL)
return DC_STATUS_INVALIDARGS;
QAndroidJniEnvironment env;
jbyteArray array = env->NewByteArray(size);
env->SetByteArrayRegion(array, 0, size, (const jbyte *) data);
auto retval = device->callMethod<jint>("write", "([B)I", array);
env->DeleteLocalRef(array);
if (retval < 0) {
INFO (device->context, "Error in %s, retval %i", __FUNCTION__, retval);
return static_cast<dc_status_t>(retval);
}
*actual = retval;
TRACE (device->context, "%s: actual write size: %i", __FUNCTION__, retval);
return DC_STATUS_SUCCESS;
}
dc_status_t serial_usb_android_open(dc_iostream_t **iostream, dc_context_t *context)
{
TRACE(device->contxt, "%s", __FUNCTION__);
static const dc_custom_cbs_t callbacks = {
.set_timeout = serial_usb_android_set_timeout, /* set_timeout */
.set_dtr = serial_usb_android_set_dtr, /* set_dtr */
.set_rts = serial_usb_android_set_rts, /* set_rts */
//.get_available = serial_usb_android_get_available,
.configure = serial_usb_android_configure,
.read = serial_usb_android_read,
.write = serial_usb_android_write,
.purge = serial_usb_android_purge,
.sleep = serial_usb_android_sleep, /* sleep */
.close = serial_usb_android_close, /* close */
};
QAndroidJniObject localdevice = QAndroidJniObject::callStaticObjectMethod("org/subsurfacedivelog/mobile/AndroidSerial",
"open_android_serial",
"()Lorg/subsurfacedivelog/mobile/AndroidSerial;");
if (localdevice == nullptr) {
return DC_STATUS_IO;
}
QAndroidJniObject *device = new QAndroidJniObject(localdevice);
TRACE(device->contxt, "%s", "calling dc_custom_open())");
return dc_custom_open(iostream, context, DC_TRANSPORT_SERIAL, &callbacks, device);
}