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/**
* 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