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wifi_marauder_uart.c
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wifi_marauder_uart.c
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#include "wifi_marauder_app_i.h"
#include "wifi_marauder_uart.h"
#define UART_CH (FuriHalSerialIdUsart)
#define BAUDRATE (115200)
struct WifiMarauderUart {
WifiMarauderApp* app;
FuriThread* rx_thread;
FuriStreamBuffer* rx_stream;
FuriStreamBuffer* pcap_stream;
FuriHalSerialHandle* serial_handle;
bool pcap;
uint8_t mark_test_buf[11];
uint8_t mark_test_idx;
uint8_t rx_buf[RX_BUF_SIZE + 1];
void (*handle_rx_data_cb)(uint8_t* buf, size_t len, void* context);
void (*handle_rx_pcap_cb)(uint8_t* buf, size_t len, void* context);
};
typedef enum {
WorkerEvtStop = (1 << 0),
WorkerEvtRxDone = (1 << 1),
WorkerEvtPcapDone = (1 << 2),
} WorkerEvtFlags;
void wifi_marauder_uart_set_handle_rx_data_cb(
WifiMarauderUart* uart,
void (*handle_rx_data_cb)(uint8_t* buf, size_t len, void* context)) {
furi_assert(uart);
uart->handle_rx_data_cb = handle_rx_data_cb;
}
void wifi_marauder_uart_set_handle_rx_pcap_cb(
WifiMarauderUart* uart,
void (*handle_rx_pcap_cb)(uint8_t* buf, size_t len, void* context)) {
furi_assert(uart);
uart->handle_rx_pcap_cb = handle_rx_pcap_cb;
}
#define WORKER_ALL_RX_EVENTS (WorkerEvtStop | WorkerEvtRxDone | WorkerEvtPcapDone)
void wifi_marauder_uart_on_irq_cb(
FuriHalSerialHandle* handle,
FuriHalSerialRxEvent event,
void* context) {
WifiMarauderUart* uart = (WifiMarauderUart*)context;
if(event == FuriHalSerialRxEventData) {
uint8_t data = furi_hal_serial_async_rx(handle);
const char* mark_begin = "[BUF/BEGIN]";
const char* mark_close = "[BUF/CLOSE]";
if(uart->mark_test_idx != 0) {
// We are trying to match a marker
if(data == mark_begin[uart->mark_test_idx] ||
data == mark_close[uart->mark_test_idx]) {
// Received char matches next char in a marker, append to test buffer
uart->mark_test_buf[uart->mark_test_idx++] = data;
if(uart->mark_test_idx == sizeof(uart->mark_test_buf)) {
// Test buffer reached max length, parse what marker this is and discard buffer
if(!memcmp(
uart->mark_test_buf, (void*)mark_begin, sizeof(uart->mark_test_buf))) {
uart->pcap = true;
} else if(!memcmp(
uart->mark_test_buf,
(void*)mark_close,
sizeof(uart->mark_test_buf))) {
uart->pcap = false;
}
uart->mark_test_idx = 0;
}
// Don't pass to stream
return;
} else {
// Received char doesn't match any expected next char, send current test buffer
if(uart->pcap) {
furi_stream_buffer_send(
uart->pcap_stream, uart->mark_test_buf, uart->mark_test_idx, 0);
furi_thread_flags_set(furi_thread_get_id(uart->rx_thread), WorkerEvtPcapDone);
} else {
furi_stream_buffer_send(
uart->rx_stream, uart->mark_test_buf, uart->mark_test_idx, 0);
furi_thread_flags_set(furi_thread_get_id(uart->rx_thread), WorkerEvtRxDone);
}
// Reset test buffer and try parsing this char from scratch
uart->mark_test_idx = 0;
}
}
// If we reach here the buffer is empty
if(data == mark_begin[0]) {
// Received marker start, append to test buffer
uart->mark_test_buf[uart->mark_test_idx++] = data;
} else {
// Not a marker start and we aren't matching a marker, this is just data
if(uart->pcap) {
furi_stream_buffer_send(uart->pcap_stream, &data, 1, 0);
furi_thread_flags_set(furi_thread_get_id(uart->rx_thread), WorkerEvtPcapDone);
} else {
furi_stream_buffer_send(uart->rx_stream, &data, 1, 0);
furi_thread_flags_set(furi_thread_get_id(uart->rx_thread), WorkerEvtRxDone);
}
}
}
}
static int32_t uart_worker(void* context) {
WifiMarauderUart* uart = (void*)context;
while(1) {
uint32_t events =
furi_thread_flags_wait(WORKER_ALL_RX_EVENTS, FuriFlagWaitAny, FuriWaitForever);
furi_check((events & FuriFlagError) == 0);
if(events & WorkerEvtStop) break;
if(events & WorkerEvtRxDone) {
size_t len = furi_stream_buffer_receive(uart->rx_stream, uart->rx_buf, RX_BUF_SIZE, 0);
if(len > 0) {
if(uart->handle_rx_data_cb) uart->handle_rx_data_cb(uart->rx_buf, len, uart->app);
}
}
if(events & WorkerEvtPcapDone) {
size_t len =
furi_stream_buffer_receive(uart->pcap_stream, uart->rx_buf, RX_BUF_SIZE, 0);
if(len > 0) {
if(uart->handle_rx_pcap_cb) uart->handle_rx_pcap_cb(uart->rx_buf, len, uart->app);
}
}
}
furi_stream_buffer_free(uart->rx_stream);
furi_stream_buffer_free(uart->pcap_stream);
return 0;
}
void wifi_marauder_uart_tx(WifiMarauderUart* uart, uint8_t* data, size_t len) {
furi_hal_serial_tx(uart->serial_handle, data, len);
}
WifiMarauderUart* wifi_marauder_uart_init(
WifiMarauderApp* app,
FuriHalSerialId channel,
const char* thread_name) {
WifiMarauderUart* uart = malloc(sizeof(WifiMarauderUart));
uart->app = app;
uart->rx_stream = furi_stream_buffer_alloc(RX_BUF_SIZE, 1);
uart->pcap_stream = furi_stream_buffer_alloc(RX_BUF_SIZE, 1);
uart->rx_thread = furi_thread_alloc();
furi_thread_set_name(uart->rx_thread, thread_name);
furi_thread_set_stack_size(uart->rx_thread, 1024);
furi_thread_set_context(uart->rx_thread, uart);
furi_thread_set_callback(uart->rx_thread, uart_worker);
furi_thread_start(uart->rx_thread);
uart->serial_handle = furi_hal_serial_control_acquire(channel);
furi_check(uart->serial_handle);
furi_hal_serial_init(uart->serial_handle, BAUDRATE);
furi_hal_serial_async_rx_start(uart->serial_handle, wifi_marauder_uart_on_irq_cb, uart, false);
return uart;
}
WifiMarauderUart* wifi_marauder_usart_init(WifiMarauderApp* app) {
return wifi_marauder_uart_init(app, UART_CH, "WifiMarauderUartRxThread");
}
void wifi_marauder_uart_free(WifiMarauderUart* uart) {
furi_assert(uart);
furi_thread_flags_set(furi_thread_get_id(uart->rx_thread), WorkerEvtStop);
furi_thread_join(uart->rx_thread);
furi_thread_free(uart->rx_thread);
furi_hal_serial_deinit(uart->serial_handle);
furi_hal_serial_control_release(uart->serial_handle);
free(uart);
}