New demo files for HCS12 GCC port.

2006-05-27 13:53:15 +00:00
parent b6df57c7e3
commit 215d93aa3d
29 changed files with 3250 additions and 0 deletions
--- a/Demo/HCS12_GCC_banked/sci.c
+++ b/Demo/HCS12_GCC_banked/sci.c
@ -0,0 +1,75 @@
+/** 
+ * sci.c controls SCI for GCC/HCS12 version of FreeRTOS Demo
+ * Parts taken from the CodeWarrior Demo in order to work similar.
+ *
+ * Author Jefferson L Smith, Robotronics Inc.
+ */
+
+#include "sci.h"
+#include <sys/ports.h>
+
+//static word SerFlag;                   /* Flags for serial communication */
+                                       /* Bits: 0 - OverRun error */
+                                       /*       1 - Framing error */
+                                       /*       2 - Parity error */
+                                       /*       3 - Char in RX buffer */
+                                       /*       4 - Full TX buffer */
+                                       /*       5 - Running int from TX */
+                                       /*       6 - Full RX buffer */
+                                       /*       7 - Noise error */
+                                       /*       8 - Idle character  */
+                                       /*       9 - Break detected  */
+                                       /*      10 - Unused */
+static word PrescaleValue;
+//static byte NumMode;                   /* Number of selected baud mode */
+
+
+/**
+ * SCI_SetBaudRateMode
+ *
+ * Changes the speed (baud rate).
+ */
+byte SCI_SetBaudRateMode(byte Mod)
+{
+  // wired for 24 MHz bus --jeffs
+  static const word SCI_Presc[4] = {39,78,156,313};
+
+  if(Mod >= 4)                         /* Is mode in baud mode list */
+    return ERR_VALUE;                  /* If no then error */
+  //NumMode = Mod;                       /* New baud mode */
+  PrescaleValue = SCI_Presc[Mod];     /* Prescaler in high speed mode */
+
+  /* SCI0CR1: LOOPS=0,SCISWAI=0,RSRC=0,M=0,WAKE=0,ILT=0,PE=0,PT=0 */
+  SCICR1 = 0x00;                       /* Set the SCI configuration */
+  /* SCI0SR2: ??=0,??=0,??=0,??=0,??=0,BRK13=0,TXDIR=0,RAF=0 */
+  SCISR2 = 0x00;                       /* Set the Break Character Length and Transmitter pin data direction in Single-wire mode */
+  SCISR1;                             /* Reset interrupt request flags */
+  SCIBD = PrescaleValue;                  /* Set prescaler bits */
+  /* SCI0CR2: SCTIE=0,TCIE=0,RIE=1,ILIE=0,TE=1,RE=1,RWU=0,SBK=0 */
+  SCICR2 = 0x2c;                         /* Disable error interrupts */
+
+  return ERR_OK;                       /* OK */
+}
+
+#if 0  //(not used)
+
+/**
+ * SCI_Init (bean AsynchroSerial)
+ *
+ * This enables SCI.
+ */
+void SCI_Init(void)
+{
+  PrescaleValue = 39;                      /* Precaler in high speed mode */
+
+  /* SCI0CR1: LOOPS=0,SCISWAI=0,RSRC=0,M=0,WAKE=0,ILT=0,PE=0,PT=0 */
+  SCICR1 = 0x00;                       /* Set the SCI configuration */
+  /* SCI0SR2: ??=0,??=0,??=0,??=0,??=0,BRK13=0,TXDIR=0,RAF=0 */
+  SCISR2 = 0x00;                       /* Set the Break Character Length and Transmitter pin data direction in Single-wire mode */
+  SCISR1;                             /* Reset interrupt request flags */
+  SCIBD = PrescaleValue;                  /* Set prescaler bits */
+  /* SCI0CR2: SCTIE=0,TCIE=0,RIE=1,ILIE=0,TE=1,RE=1,RWU=0,SBK=0 */
+  SCICR2 = 0x2c;                         /* Disable error interrupts */
+}
+#endif
+