Update filter for samplingrate

Author: Amanmahe

src/components/Connection.tsx

@@ -891,10 +891,10 @@ const Connection: React.FC<ConnectionProps> = ({
         const notchFilters = Array.from({ length: maxCanvasElementCountRef.current }, () => new Notch());
         const EXGFilters = Array.from({ length: maxCanvasElementCountRef.current }, () => new EXGFilter());
         notchFilters.forEach((filter) => {
-            filter.setbits(detectedBitsRef.current.toString()); // Set the bits value for all instances
+            filter.setbits(currentSamplingRate); // Set the bits value for all instances
         });
         EXGFilters.forEach((filter) => {
-            filter.setbits(detectedBitsRef.current.toString()); // Set the bits value for all instances
+            filter.setbits(detectedBitsRef.current.toString(),currentSamplingRate); // Set the bits value for all instances
         });
         try {
             while (isDeviceConnectedRef.current) {

src/components/boards.ts

@@ -172,7 +172,7 @@ export const BoardsList: ReadonlyArray<BoardConfig> = Object.freeze([
         field_pid: 22336,
         adc_resolution: 12,
         channel_count: 16,
-        sampling_rate: 500,
+        sampling_rate: 250,
         serial_timeout: HIGH_SPEED_TIMEOUT,
     }),
     createBoardConfig({

src/components/filters.tsx

@@ -21,6 +21,7 @@ export class EXGFilter {
     private bits: string | null;
     private bitsPoints: number;
     private yScale: number;
+    private  currentSamplingRate:number;
 
 
     constructor() {
@@ -34,6 +35,7 @@ export class EXGFilter {
         this.bits = null;
         this.bitsPoints=0;
         this.yScale=0;
+        this.currentSamplingRate=0;
     }
     //bits-
     //1.500 
@@ -44,7 +46,8 @@ export class EXGFilter {
     //3.EEG
     //4.EMG
     // function to apply the 
-    setbits(bits: string): void {
+    setbits(bits: string,currentSamplingRate:number): void {
+        this.currentSamplingRate=currentSamplingRate;
         this.bits = bits;
         this.bitsPoints = Math.pow(2,parseInt(bits)
         ); // Adjust according to your ADC resolution
@@ -55,11 +58,9 @@ export class EXGFilter {
         if(!type) return (input - this.bitsPoints / 2) * this.yScale;
         let output = input;
         let chData=0;
-        switch (this.bits) {
+        switch (this.currentSamplingRate) {
             //bitsrate 500Hz
-            case "16":
-            case "14":
-            case "12":   
+            case 500: 
                 switch (type) {
                     case 1: // ECG Sampling rate: 500.0 Hz, frequency: 30.0 Hz.
                         // Filter is order 2, implemented as second-order sections (biquads).
@@ -97,7 +98,7 @@ export class EXGFilter {
                         break;
                 }
                 break;
-            case "10":
+            case 250:
                 //bitsrate 250Hz
                 switch (type) {
                     case 1: // ECG Sampling rate: 250.0 Hz, frequency: 30.0 Hz.
@@ -155,7 +156,8 @@ export class Notch {
     private z2_2: number;
     private x_1: number;
     private x_2: number;
-    private bits: string | null;
+    private currentSamplingRate:number;
+
 
     constructor() {
         // Initialize state variables for both filter sections
@@ -165,21 +167,20 @@ export class Notch {
         this.z2_2 = 0;
         this.x_1 = 0;
         this.x_2 = 0;
-        this.bits = null;
+        this.currentSamplingRate=0;
+
     }
 
-    setbits(bits: string): void {
-        this.bits = bits;
+    setbits(currentSamplingRate:number): void {
+        this.currentSamplingRate=currentSamplingRate;
     }
 
     // Method to apply the filter
     process(input: number, type: number): number {
         if(!type) return input;
         let output = input;
-        switch (this.bits) {
-            case "16" :
-            case "14": // 500Hz
-            case "12":   // 500Hz
+        switch (this.currentSamplingRate) {
+            case 500:   // 500Hz
                 switch (type) {
                     case 1: // Notch Sampling rate: 500.0 Hz, frequency: [48.0, 52.0] Hz.
                         this.x_1 = output - (-1.56858163 * this.z1_1) - (0.96424138 * this.z2_1);
@@ -208,7 +209,7 @@ export class Notch {
                 }
                 break;
 
-            case "10": // 250Hz
+            case 250: // 250Hz
                 switch (type) {
                     case 1: // Notch Sampling rate: 250.0 Hz, frequency: [48.0, 52.0] Hz.
                         this.x_1 = output - (-0.53127491 * this.z1_1) - (0.93061518 * this.z2_1);