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UART bugfixes and improvements

This commit is contained in:
Robin Müller 2021-09-08 16:10:18 +02:00
parent d92a796705
commit c42eb59d2e
No known key found for this signature in database
GPG Key ID: 11D4952C8CCEF814
2 changed files with 33 additions and 13 deletions
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42
hal/src/fsfw_hal/linux/uart/UartComIF.cpp
View File

@ -1,6 +1,7 @@
#include "fsfw_hal/linux/uart/UartComIF.h"
#include "UartComIF.h"
#include "OBSWConfig.h"
#include "fsfw_hal/linux/utility.h"
#include "fsfw/serviceinterface/ServiceInterface.h"
#include <cstring>
@ -60,7 +61,13 @@ int UartComIF::configureUartPort(UartCookie* uartCookie) {
struct termios options = {};
std::string deviceFile = uartCookie->getDeviceFile();
int fd = open(deviceFile.c_str(), O_RDWR);
int flags = O_RDWR;
if(uartCookie->getUartMode() == UartModes::CANONICAL) {
// In non-canonical mode, don't specify O_NONBLOCK because these properties will be
// controlled by the VTIME and VMIN parameters and O_NONBLOCK would override this
flags |= O_NONBLOCK;
}
int fd = open(deviceFile.c_str(), flags);
if (fd < 0) {
sif::warning << "UartComIF::configureUartPort: Failed to open uart " << deviceFile <<
@ -259,23 +266,22 @@ void UartComIF::configureBaudrate(struct termios* options, UartCookie* uartCooki
ReturnValue_t UartComIF::sendMessage(CookieIF *cookie,
const uint8_t *sendData, size_t sendLen) {
int fd = 0;
std::string deviceFile;
UartDeviceMapIter uartDeviceMapIter;
if(sendData == nullptr) {
sif::debug << "UartComIF::sendMessage: Send Data is nullptr" << std::endl;
return RETURN_FAILED;
}
if(sendLen == 0) {
return RETURN_OK;
}
if(sendData == nullptr) {
sif::warning << "UartComIF::sendMessage: Send data is nullptr" << std::endl;
return RETURN_FAILED;
}
UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
if(uartCookie == nullptr) {
sif::debug << "UartComIF::sendMessasge: Invalid UART Cookie!" << std::endl;
sif::warning << "UartComIF::sendMessasge: Invalid UART Cookie!" << std::endl;
return NULLPOINTER;
}
@ -347,12 +353,13 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM
size_t maxReplySize = uartCookie.getMaxReplyLen();
int fd = iter->second.fileDescriptor;
auto bufferPtr = iter->second.replyBuffer.data();
iter->second.replyLen = 0;
do {
size_t allowedReadSize = 0;
if(currentBytesRead >= maxReplySize) {
// Overflow risk. Emit warning, trigger event and break. If this happens,
// the reception buffer is not large enough or data is not polled often enough.
#if OBSW_VERBOSE_LEVEL >= 1
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "UartComIF::requestReceiveMessage: Next read would cause overflow!"
<< std::endl;
@ -370,7 +377,20 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM
bytesRead = read(fd, bufferPtr, allowedReadSize);
if (bytesRead < 0) {
return RETURN_FAILED;
// EAGAIN: No data available in non-blocking mode
if(errno != EAGAIN) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "UartComIF::handleCanonicalRead: read failed with code" <<
errno << ": " << strerror(errno) << std::endl;
#else
sif::printWarning("UartComIF::handleCanonicalRead: read failed with code %d: %s\n",
errno, strerror(errno));
#endif
#endif
return RETURN_FAILED;
}
}
else if(bytesRead > 0) {
iter->second.replyLen += bytesRead;

4
hal/src/fsfw_hal/linux/uart/UartCookie.cpp
View File

@ -4,8 +4,8 @@
UartCookie::UartCookie(object_id_t handlerId, std::string deviceFile, UartModes uartMode,
uint32_t baudrate, size_t maxReplyLen):
handlerId(handlerId), deviceFile(deviceFile), uartMode(uartMode), baudrate(baudrate),
maxReplyLen(maxReplyLen) {
handlerId(handlerId), deviceFile(deviceFile), uartMode(uartMode),
baudrate(baudrate), maxReplyLen(maxReplyLen) {
}
UartCookie::~UartCookie() {}