forked from len0rd/rockbox
c519e6365e
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5439 a1c6a512-1295-4272-9138-f99709370657
139 lines
2.9 KiB
C
139 lines
2.9 KiB
C
// UART wrapper implementation for the Win32 platform
|
|
// make a new version of this file for different systems, e.g. Linux
|
|
|
|
#include <windows.h>
|
|
#include "scalar_types.h" // (U)INT8/16/32
|
|
#include "Uart.h"
|
|
|
|
// COMx for windows, returns NULL on error
|
|
tUartHandle UartOpen(char* szPortName)
|
|
{
|
|
HANDLE serial_handle;
|
|
DCB dcb;
|
|
COMMTIMEOUTS cto = { 0, 0, 0, 0, 0 };
|
|
|
|
memset(&dcb,0,sizeof(dcb));
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
// set DCB to configure the serial port
|
|
dcb.DCBlength = sizeof(dcb);
|
|
|
|
dcb.fOutxCtsFlow = 0;
|
|
dcb.fOutxDsrFlow = 0;
|
|
dcb.fDtrControl = DTR_CONTROL_ENABLE; // enable for power
|
|
dcb.fDsrSensitivity = 0;
|
|
dcb.fRtsControl = RTS_CONTROL_ENABLE; // enable for power
|
|
dcb.fOutX = 0;
|
|
dcb.fInX = 0;
|
|
|
|
/* ----------------- misc parameters ----- */
|
|
dcb.fErrorChar = 0;
|
|
dcb.fBinary = 1;
|
|
dcb.fNull = 0;
|
|
dcb.fAbortOnError = 0;
|
|
dcb.wReserved = 0;
|
|
dcb.XonLim = 2;
|
|
dcb.XoffLim = 4;
|
|
dcb.XonChar = 0x13;
|
|
dcb.XoffChar = 0x19;
|
|
dcb.EvtChar = 0;
|
|
|
|
/* ----------------- defaults ----- */
|
|
dcb.BaudRate = 4800;
|
|
dcb.Parity = NOPARITY;
|
|
dcb.fParity = 0;
|
|
dcb.StopBits = ONESTOPBIT;
|
|
dcb.ByteSize = 8;
|
|
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
// opening serial port
|
|
serial_handle = CreateFile(szPortName, GENERIC_READ | GENERIC_WRITE,
|
|
0, NULL, OPEN_EXISTING, FILE_FLAG_WRITE_THROUGH, NULL);
|
|
|
|
if (serial_handle == INVALID_HANDLE_VALUE)
|
|
{
|
|
//printf("Cannot open port \n");
|
|
return NULL;
|
|
}
|
|
|
|
SetCommMask(serial_handle, 0);
|
|
SetCommTimeouts(serial_handle, &cto);
|
|
|
|
if(!SetCommState(serial_handle, &dcb))
|
|
{
|
|
//printf("Error setting up COM params\n");
|
|
CloseHandle(serial_handle);
|
|
return NULL;
|
|
}
|
|
|
|
return serial_handle;
|
|
}
|
|
|
|
// returns true on success, false on error
|
|
bool UartConfig(tUartHandle handle, long lBaudRate, tParity nParity, tStopBits nStopBits, int nByteSize)
|
|
{
|
|
DCB dcb;
|
|
|
|
if (!GetCommState (handle, &dcb))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
dcb.BaudRate = lBaudRate;
|
|
dcb.Parity = nParity;
|
|
dcb.StopBits = nStopBits;
|
|
dcb.ByteSize = nByteSize;
|
|
|
|
if(!SetCommState(handle, &dcb))
|
|
{
|
|
//DWORD dwErr = GetLastError();
|
|
//printf("Error %d setting up COM params for baudrate byte\n", dwErr);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// returns how much data was actually transmitted
|
|
long UartWrite(tUartHandle handle, unsigned char* pData, long lSize)
|
|
{
|
|
BOOL success;
|
|
DWORD result_nbr;
|
|
|
|
success = WriteFile(handle, pData, lSize, &result_nbr, NULL);
|
|
|
|
if(!success)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return result_nbr;
|
|
}
|
|
|
|
// returns how much data was actually received
|
|
long UartRead(tUartHandle handle, unsigned char* pBuffer, long lSize)
|
|
{
|
|
BOOL success;
|
|
DWORD read_nbr;
|
|
|
|
success = ReadFile(handle, pBuffer, lSize, &read_nbr, NULL);
|
|
if(!success)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return read_nbr;
|
|
}
|
|
|
|
|
|
void UartClose(tUartHandle handle)
|
|
{
|
|
if (handle != NULL)
|
|
{
|
|
CloseHandle(handle);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|