Diff: Serial.cpp

Revision:

1:e4163fd9aa4c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Serial.cpp	Mon May 04 17:52:49 2020 +0000
@@ -0,0 +1,99 @@
+#include "Serial.h"
+#include "Utilities.h"
+
+unsigned char rxBuff[64];
+char rxHead, rxTail;
+void UART1interrupt( iv IVT_UART_1 ilevel 6 ics ICS_AUTO)
+{
+    rxBuff[rxHead++] = UART1_Read(); // read the received data
+    U1RXIF_bit = 0;
+}
+
+void Serial_Init(long baudrate)
+{
+    AD1PCFG = 0xFFFF; // Configure AN pins as digital I/O
+    UART1_Init(9600);
+    rxHead = 0;
+    rxTail = 0;
+
+    U1IP0_bit = 0; // Set UART2 interrupt
+    U1IP1_bit = 1; // Set interrupt priorities
+    U1IP2_bit = 1; // Set UART2 interrupt to level 6
+
+    U1RXIE_bit = 1; // Set UART Receive Interrupt
+    U1RXIF_bit = 0;
+    EnableInterrupts(); // Enable interruts as previously set
+}
+
+unsigned char Serial_Write(unsigned char c)
+{
+    UART1_Write(c);
+    return 1;
+}
+
+unsigned char Serial_Read()
+{
+    unsigned char c;
+    if (rxTail < rxHead)
+    {
+        c = rxBuff[rxTail++];
+        if (rxTail == rxHead)
+        {
+            rxHead = 0;
+            rxTail = 0;
+        }
+    }
+    else
+    {
+        rxHead = 0;
+        rxTail = 0;
+        c = -1;
+    }
+    return c;
+}
+
+unsigned char Serial_Available()
+{
+    return rxHead - rxTail;
+}
+
+unsigned char Serial_ReadBytes(char *buf, unsigned char len)
+{
+    unsigned char cnt = 0;
+    if (len < rxHead - rxTail)
+    {
+        ArrayCopy(buf, &rxBuff[rxTail], len);
+        rxTail += len;
+        cnt = len;
+    }
+    else if (len == rxHead - rxTail)
+    {
+        ArrayCopy(buf, &rxBuff[rxTail], len);
+        rxTail = 0;
+        rxHead = 0;
+        cnt = len;
+    }
+    else
+    {
+        ArrayCopy(buf, &rxBuff[rxTail], rxHead - rxTail);
+        cnt = rxHead - rxTail;
+        rxTail = 0;
+        rxHead = 0;
+    }
+    return cnt;
+}
+
+void Serial_Print(unsigned char *txt)
+{
+    short i = strlen(txt);
+    while (1)
+    {
+        UART1_Write(*txt);
+        ++txt;
+        --i;
+        if (i == 0)
+        {
+            break;
+        }
+    }
+}
\ No newline at end of file