#include "uart.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+
// The windows serial port implementation
#ifdef _WIN32
#include <windows.h>
typedef struct {
- HANDLE hPort; // Serial port handle
- DCB dcb; // Device control settings
- COMMTIMEOUTS ct; // Serial port time-out configuration
+ HANDLE hPort; // Serial port handle
+ DCB dcb; // Device control settings
+ COMMTIMEOUTS ct; // Serial port time-out configuration
} serial_port_windows;
+
void upcase(char *p) {
- while(*p != '\0') {
- if(*p >= 97 && *p <= 122) {
- *p -= 32;
- }
- ++p;
- }
+ while(*p != '\0') {
+ if(*p >= 97 && *p <= 122) {
+ *p -= 32;
+ }
+ ++p;
+ }
}
-serial_port uart_open(const char* pcPortName) {
- char acPortName[255];
- serial_port_windows* sp = malloc(sizeof(serial_port_windows));
-
- // Copy the input "com?" to "\\.\COM?" format
- sprintf(acPortName,"\\\\.\\%s",pcPortName);
- upcase(acPortName);
-
- // Try to open the serial port
- sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
- if (sp->hPort == INVALID_HANDLE_VALUE) {
- uart_close(sp);
- return INVALID_SERIAL_PORT;
- }
-
- // Prepare the device control
- memset(&sp->dcb, 0, sizeof(DCB));
- sp->dcb.DCBlength = sizeof(DCB);
- if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) {
- uart_close(sp);
- return INVALID_SERIAL_PORT;
- }
-
- // Update the active serial port
- if(!SetCommState(sp->hPort,&sp->dcb)) {
- uart_close(sp);
- return INVALID_SERIAL_PORT;
- }
-
- sp->ct.ReadIntervalTimeout = 0;
- sp->ct.ReadTotalTimeoutMultiplier = 0;
- sp->ct.ReadTotalTimeoutConstant = 30;
- sp->ct.WriteTotalTimeoutMultiplier = 0;
- sp->ct.WriteTotalTimeoutConstant = 30;
-
- if(!SetCommTimeouts(sp->hPort,&sp->ct)) {
- uart_close(sp);
- return INVALID_SERIAL_PORT;
- }
-
- PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
-
- return sp;
-}
void uart_close(const serial_port sp) {
- CloseHandle(((serial_port_windows*)sp)->hPort);
- free(sp);
+ CloseHandle(((serial_port_windows*)sp)->hPort);
+ free(sp);
}
+
+serial_port uart_open(const char* pcPortName) {
+ char acPortName[255];
+ serial_port_windows* sp = malloc(sizeof(serial_port_windows));
+
+ // Copy the input "com?" to "\\.\COM?" format
+ sprintf(acPortName,"\\\\.\\%s",pcPortName);
+ upcase(acPortName);
+
+ // Try to open the serial port
+ sp->hPort = CreateFileA(acPortName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
+ if (sp->hPort == INVALID_HANDLE_VALUE) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ // Prepare the device control
+ memset(&sp->dcb, 0, sizeof(DCB));
+ sp->dcb.DCBlength = sizeof(DCB);
+ if (!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ // Update the active serial port
+ if (!SetCommState(sp->hPort,&sp->dcb)) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ sp->ct.ReadIntervalTimeout = 0;
+ sp->ct.ReadTotalTimeoutMultiplier = 0;
+ sp->ct.ReadTotalTimeoutConstant = 30;
+ sp->ct.WriteTotalTimeoutMultiplier = 0;
+ sp->ct.WriteTotalTimeoutConstant = 30;
+
+ if (!SetCommTimeouts(sp->hPort, &sp->ct)) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
+
+ return sp;
+}
+
+
bool uart_receive(const serial_port sp, uint8_t *pbtRx, size_t pszMaxRxLen, size_t *pszRxLen) {
- return ReadFile(((serial_port_windows*)sp)->hPort, pbtRx, pszMaxRxLen, (LPDWORD)pszRxLen, NULL);
+ return ReadFile(((serial_port_windows*)sp)->hPort, pbtRx, pszMaxRxLen, (LPDWORD)pszRxLen, NULL);
}
+
bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen) {
- DWORD dwTxLen = 0;
- return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
+ DWORD dwTxLen = 0;
+ return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
}
+
bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
- serial_port_windows* spw;
- spw = (serial_port_windows*)sp;
- spw->dcb.BaudRate = uiPortSpeed;
- return SetCommState(spw->hPort, &spw->dcb);
+ serial_port_windows* spw;
+ spw = (serial_port_windows*)sp;
+ spw->dcb.BaudRate = uiPortSpeed;
+ return SetCommState(spw->hPort, &spw->dcb);
}
+
uint32_t uart_get_speed(const serial_port sp) {
- const serial_port_windows* spw = (serial_port_windows*)sp;
- if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
- return spw->dcb.BaudRate;
- }
- return 0;
+ const serial_port_windows* spw = (serial_port_windows*)sp;
+ if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
+ return spw->dcb.BaudRate;
+ }
+ return 0;
}
#endif