| /** | |
| * 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 | |