cores/xmc: Write function with buf and size.

Author: dineshgit411

cores/xmc/Uart.cpp

@@ -68,6 +68,7 @@ void Uart::begin(unsigned long baud, XMC_UART_MODE_t config) {
 
     XMC_GPIO_Init(_XMC_UART_config->rx.port, _XMC_UART_config->rx.pin,
                   &(_XMC_UART_config->rx_config));
+    serial_ready = true;
 }
 
 void Uart::end(void) {
@@ -77,6 +78,7 @@ void Uart::end(void) {
     NVIC_DisableIRQ(_XMC_UART_config->irq_num);
     // Clear any received data after stopping interrupts
     _rx_buffer.clear();
+    serial_ready = false;
 }
 
 void Uart::setInterruptPriority(uint32_t priority) {
@@ -107,6 +109,24 @@ size_t Uart::write(const uint8_t uc_data) {
     XMC_UART_CH_Transmit(_XMC_UART_config->channel, uc_data);
     return 1;
 }
+size_t Uart::write(const uint8_t* buffer, size_t length) {
+    // Check for null pointer or zero length
+    if (buffer == nullptr || length == 0) {
+        return 0; 
+    }
+    size_t bytes_sent = 0;
+    for (size_t i = 0; i < length; ++i) {
+        // Transmit a single byte using XMC UART transmit function
+        XMC_UART_CH_Transmit(_XMC_UART_config->channel, buffer[i]);
+        ++bytes_sent; // Increment the count of bytes sent
+    }
+    // Return the total number of bytes successfully sent
+    return bytes_sent;
+}
+
+Uart::operator bool() {
+    return serial_ready;
+}
 
 void Uart::IrqHandler(void) {
     // Receive data Interrupt handler

cores/xmc/Uart.h

@@ -84,17 +84,20 @@ class Uart : public HardwareSerial {
     void flush(void);
 
     size_t write(const uint8_t);
+    size_t write(const uint8_t *buffer, size_t size);
     using Print::write; // pull in write(str) and write(buf, size) from Print
 
-    operator bool() { return true; }
+    operator bool();
 
     void setInterruptPriority(uint32_t priority);
     uint32_t getInterruptPriority();
 
     void IrqHandler(void);
 
 private:
-    RingBuffer _rx_buffer;
+    static constexpr size_t BUF_LENGTH = 512;
+    RingBufferN<BUF_LENGTH> _rx_buffer;
+    bool serial_ready =false;
 };
 extern Uart Serial;
 extern Uart Serial1;