Merge pull request #6 from ElectronicCats/syncword

Add option to select sync word

Author: sabas1080

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
           sdk-channel: release
           app-dir: ./applications_user/lora_app
       - name: Upload app artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ github.event.repository.name }}-${{ steps.build-app.outputs.suffix }}
           path: ${{ steps.build-app.outputs.fap-artifacts }}

applications_user/lora_app/lora.c

@@ -24,7 +24,7 @@ Code porting from LoRa library https://github.dev/thekakester/Arduino-LoRa-Sx126
 
 static uint32_t timeout = 1000;
 //static uint32_t timeout = 100;
-static FuriHalSpiBusHandle* spi = &furi_hal_spi_bus_handle_external;
+static const FuriHalSpiBusHandle* spi = &furi_hal_spi_bus_handle_external;
 
 const GpioPin* const pin_beacon = &gpio_swclk;
 const GpioPin* const pin_nss1 = &gpio_ext_pc0;
@@ -41,6 +41,7 @@ uint32_t pllFrequency;
 uint8_t bandwidth;
 uint8_t codingRate;
 uint8_t spreadingFactor;
+uint16_t syncWord;
 uint8_t lowDataRateOptimize;
 uint32_t transmitTimeout; //Worst-case transmit time depends on some factors
 
@@ -110,20 +111,6 @@ uint8_t readRegister(uint16_t address) {
     return data;
 }
 
-uint16_t getSyncWord() {
-    uint8_t msb, lsb;
-    uint16_t syncword;
-    msb = readRegister(REG_LR_SYNCWORD);
-    lsb = readRegister(REG_LR_SYNCWORD + 1);
-
-    FURI_LOG_E(TAG, "MSB: %02x", msb);
-    FURI_LOG_E(TAG, "LSB: %02x", lsb);
-
-    syncword = (msb << 8) + lsb;
-
-    return syncword;
-}
-
 uint32_t getFreqInt() {
     //get the current set device frequency from registers, return as long integer
 
@@ -580,6 +567,42 @@ bool configSetCodingRate(int cr) {
     return true;
 }
 
+/* Set the sync word*/
+bool configSetSyncWord(uint16_t sw) {
+    uint8_t msb = (sw >> 8) & 0xFF;
+    uint8_t lsb = sw & 0xFF;
+
+    // Write MSB to 0x0740
+    furi_hal_gpio_write(pin_nss1, false); // CS low
+    furi_hal_spi_acquire(spi);
+
+    spiBuff[0] = 0x0D; // WriteRegister opcode
+    spiBuff[1] = 0x07; // Address high byte (0x0740)
+    spiBuff[2] = 0x40; // Address low byte
+    spiBuff[3] = msb; // Data
+    furi_hal_spi_bus_tx(spi, spiBuff, 4, timeout);
+
+    furi_hal_spi_release(spi);
+    furi_hal_gpio_write(pin_nss1, true); // CS high
+
+    // Write LSB to 0x0741
+    furi_hal_gpio_write(pin_nss1, false); // CS low
+    furi_hal_spi_acquire(spi);
+
+    spiBuff[0] = 0x0D; // WriteRegister opcode
+    spiBuff[1] = 0x07; // Address high byte (0x0741)
+    spiBuff[2] = 0x41; // Address low byte
+    spiBuff[3] = lsb; // Data
+    furi_hal_spi_bus_tx(spi, spiBuff, 4, timeout);
+
+    furi_hal_spi_release(spi);
+    furi_hal_gpio_write(pin_nss1, true); // CS high
+
+    furi_delay_ms(1); // give chip time
+
+    return true;
+}
+
 /* Change the spreading factor of a packet
 The higher the spreading factor, the slower and more reliable the transmission will be. */
 bool configSetSpreadingFactor(int sf) {