RS232 code rewrote: now we can use it on Windows.
This commit is contained in:
Romuald Conty
parent
645796d0b2
commit
b110b5b5a9
1 changed files with 64 additions and 147 deletions
189
src/rs232.c
189
src/rs232.c
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@ -24,7 +24,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "rs232.h"
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#ifndef _WIN32 /* Linux */
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// Test if we are dealing with unix operating systems
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#ifndef _WIN32
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typedef struct termios term_info;
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typedef struct {
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@ -136,169 +137,85 @@ bool rs232_send(const serial_port sp, const byte* pbtTx, const uint32_t uiTxLen)
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return (iResult >= 0);
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}
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#else /* windows */
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#else
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// The windows serial port implementation
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typedef struct {
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HANDLE hPort; // Serial port handle
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DCB dcb; // Device control settings
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COMMTIMEOUTS ct; // Serial port time-out configuration
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} serial_port_windows;
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HANDLE Cport[16];
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char comports[16][10]={"\\\\.\\COM1", "\\\\.\\COM2", "\\\\.\\COM3", "\\\\.\\COM4",
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"\\\\.\\COM5", "\\\\.\\COM6", "\\\\.\\COM7", "\\\\.\\COM8",
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"\\\\.\\COM9", "\\\\.\\COM10", "\\\\.\\COM11", "\\\\.\\COM12",
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"\\\\.\\COM13", "\\\\.\\COM14", "\\\\.\\COM15", "\\\\.\\COM16"};
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char baudr[64];
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int OpenComport(int comport_number, int baudrate)
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serial_port rs232_open(const char* pcPortName)
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{
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if((comport_number>15)||(comport_number<0))
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char acPortName[255];
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serial_port_windows* sp = malloc(sizeof(serial_port_windows));
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// Copy the input "com?" to "\\.\COM?" format
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sprintf(acPortName,"\\\\.\\%s",pcPortName);
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_strupr(acPortName);
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// Try to open the serial port
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sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,NULL,NULL,OPEN_EXISTING,NULL,NULL);
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if (sp->hPort == INVALID_HANDLE_VALUE)
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{
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printf("illegal comport number\n");
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return(1);
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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switch(baudrate)
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// Prepare the device control
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memset(&sp->dcb, 0, sizeof(DCB));
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sp->dcb.DCBlength = sizeof(DCB);
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if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb))
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{
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sscanf(baudr,"baud=%d data=8 parity=N stop=1",baudrate);
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/*
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case 110 : strcpy(baudr, "baud=110 data=8 parity=N stop=1");
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break;
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case 300 : strcpy(baudr, "baud=300 data=8 parity=N stop=1");
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break;
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case 600 : strcpy(baudr, "baud=600 data=8 parity=N stop=1");
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break;
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case 1200 : strcpy(baudr, "baud=1200 data=8 parity=N stop=1");
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break;
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case 2400 : strcpy(baudr, "baud=2400 data=8 parity=N stop=1");
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break;
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case 4800 : strcpy(baudr, "baud=4800 data=8 parity=N stop=1");
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break;
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case 9600 : strcpy(baudr, "baud=9600 data=8 parity=N stop=1");
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break;
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case 19200 : strcpy(baudr, "baud=19200 data=8 parity=N stop=1");
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break;
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case 38400 : strcpy(baudr, "baud=38400 data=8 parity=N stop=1");
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break;
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case 57600 : strcpy(baudr, "baud=57600 data=8 parity=N stop=1");
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break;
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case 115200 : strcpy(baudr, "baud=115200 data=8 parity=N stop=1");
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break;
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case 128000 : strcpy(baudr, "baud=128000 data=8 parity=N stop=1");
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break;
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case 256000 : strcpy(baudr, "baud=256000 data=8 parity=N stop=1");
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break;
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default : printf("invalid baudrate\n");
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return(1);
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break;
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*/
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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Cport[comport_number] = CreateFileA(comports[comport_number],
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GENERIC_READ|GENERIC_WRITE,
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0, /* no share */
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NULL, /* no security */
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OPEN_EXISTING,
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0, /* no threads */
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NULL); /* no templates */
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if(Cport[comport_number]==INVALID_HANDLE_VALUE)
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// Update the active serial port
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if(!SetCommState(sp->hPort,&sp->dcb))
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{
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printf("unable to open comport\n");
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return(1);
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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DCB port_settings;
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memset(&port_settings, 0, sizeof(port_settings)); /* clear the new struct */
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port_settings.DCBlength = sizeof(port_settings);
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sp->ct.ReadIntervalTimeout = 30;
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sp->ct.ReadTotalTimeoutMultiplier = 0;
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sp->ct.ReadTotalTimeoutConstant = 0;
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sp->ct.WriteTotalTimeoutMultiplier = 0;
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sp->ct.WriteTotalTimeoutConstant = 0;
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if(!BuildCommDCBA(baudr, &port_settings))
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if(!SetCommTimeouts(sp->hPort,&sp->ct))
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{
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printf("unable to set comport dcb settings\n");
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CloseHandle(Cport[comport_number]);
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return(1);
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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if(!SetCommState(Cport[comport_number], &port_settings))
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{
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printf("unable to set comport cfg settings\n");
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CloseHandle(Cport[comport_number]);
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return(1);
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}
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COMMTIMEOUTS Cptimeouts;
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Cptimeouts.ReadIntervalTimeout = MAXDWORD;
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Cptimeouts.ReadTotalTimeoutMultiplier = 0;
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Cptimeouts.ReadTotalTimeoutConstant = 0;
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Cptimeouts.WriteTotalTimeoutMultiplier = 0;
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Cptimeouts.WriteTotalTimeoutConstant = 0;
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if(!SetCommTimeouts(Cport[comport_number], &Cptimeouts))
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{
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printf("unable to set comport time-out settings\n");
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CloseHandle(Cport[comport_number]);
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return(1);
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}
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return(0);
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return sp;
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}
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int PollComport(int comport_number, unsigned char *buf, int size)
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void rs232_close(const serial_port sp)
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{
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int n;
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if(size>4096) size = 4096;
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/* added the void pointer cast, otherwise gcc will complain about */
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/* "warning: dereferencing type-punned pointer will break strict aliasing rules" */
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ReadFile(Cport[comport_number], buf, size, (LPDWORD)((void *)&n), NULL);
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return(n);
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CloseHandle(((serial_port_windows*)sp)->hPort);
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free(sp);
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}
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int SendByte(int comport_number, unsigned char byte)
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bool rs232_cts(const serial_port sp)
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{
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int n;
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WriteFile(Cport[comport_number], &byte, 1, (LPDWORD)((void *)&n), NULL);
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if(n<0) return(1);
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return(0);
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DWORD dwStatus;
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if (GetCommModemStatus(((serial_port_windows*)sp)->hPort,&dwStatus) == NULL) return false;
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return (dwStatus & MS_CTS_ON);
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}
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int SendBuf(int comport_number, unsigned char *buf, int size)
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bool rs232_receive(const serial_port sp, byte* pbtRx, uint32_t* puiRxLen)
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{
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int n;
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if(WriteFile(Cport[comport_number], buf, size, (LPDWORD)((void *)&n), NULL))
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{
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return(n);
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}
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return(-1);
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return (ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,*puiRxLen,(LPDWORD)puiRxLen,NULL) != NULL);
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}
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bool rs232_cts(const serial_port sp);
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bool rs232_send(const serial_port sp, const byte* pbtTx, const uint32_t uiTxLen)
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{
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int status;
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GetCommModemStatus(Cport[comport_number], (LPDWORD)((void *)&status));
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if(status&MS_CTS_ON) return(1);
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else return(0);
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DWORD dwTxLen;
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return (WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,uiTxLen,&dwTxLen,NULL) != NULL);
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}
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void CloseComport(int comport_number)
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{
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CloseHandle(Cport[comport_number]);
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}
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#endif
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