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Fixed return type for Bridge.transfer(). Refactored File I/O class.

This commit is contained in:
Cristian Maglie 2013-06-10 11:23:14 +02:00
parent 9a0621aad7
commit 5cb9a004bc
3 changed files with 49 additions and 91 deletions
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49
libraries/Bridge/Bridge.cpp
View File

@ -105,53 +105,6 @@ void BridgeClass::writeCommandInput(uint8_t handle,
transfer(cmd, 2, buff, size, NULL, 0);
}
uint8_t BridgeClass::fileOpen(String &file, uint8_t mode, uint8_t &err) {
uint8_t cmd[] = {'F', mode};
uint8_t res[2];
transfer(cmd, 2, (uint8_t*)file.c_str(), file.length(), res, 2);
err = res[0];
return res[1];
}
void BridgeClass::fileClose(uint8_t handle) {
uint8_t cmd[] = {'f', handle};
transfer(cmd, 2);
}
unsigned int BridgeClass::fileRead(uint8_t handle, uint8_t *buff, unsigned int size, uint8_t &err) {
uint8_t s = size > 255 ? 255 : size-1;
uint8_t cmd[] = {'G', handle, s};
uint8_t l = transfer(cmd, 3, buff, size) - 1;
err = buff[0]; // First byte is error code
if (l>0) {
// Shift the reminder of buffer
for (uint8_t i=0; i<l; i++)
buff[i] = buff[i+1];
}
return l;
}
void BridgeClass::fileWrite(uint8_t handle, const uint8_t *buff, unsigned int size, uint8_t &err) {
uint8_t cmd[] = {'g', handle};
uint8_t res[1];
transfer(cmd, 2, buff, size, res, 1);
err = res[0];
}
void BridgeClass::fileSeek(uint8_t handle, uint32_t position, uint8_t &err) {
uint8_t cmd[] = {
's',
handle,
(position >> 24) & 0xFF,
(position >> 16) & 0xFF,
(position >> 8) & 0xFF,
position & 0xFF
};
uint8_t res[1];
transfer(cmd, 6, res, 1);
err = res[0];
}
unsigned int BridgeClass::readMessage(uint8_t *buff, unsigned int size) {
uint8_t tmp[] = { 'm' };
return transfer(tmp, 1, buff, size);
@ -204,7 +157,7 @@ bool BridgeClass::crcCheck(uint16_t _CRC) {
return CRC == _CRC;
}
uint8_t BridgeClass::transfer(const uint8_t *buff1, uint16_t len1,
uint16_t BridgeClass::transfer(const uint8_t *buff1, uint16_t len1,
const uint8_t *buff2, uint16_t len2,
const uint8_t *buff3, uint16_t len3,
uint8_t *rxbuff, uint16_t rxlen)

28
libraries/Bridge/Bridge.h
View File

@ -42,20 +42,6 @@ public:
void writeCommandInput(uint8_t handle, const char *buff, unsigned int size)
{ writeCommandInput(handle, reinterpret_cast<const uint8_t *>(buff), size); }
// Methods to handle files
uint8_t fileOpen(String &file, uint8_t mode, uint8_t &err);
void fileClose(uint8_t handle);
unsigned int fileRead(uint8_t handle, uint8_t *buff, unsigned int size, uint8_t &err);
unsigned int fileRead(uint8_t handle, char *buff, unsigned int size, uint8_t &err)
{ return fileRead(handle, reinterpret_cast<uint8_t *>(buff), size, err); }
void fileWrite(uint8_t handle, const uint8_t *buff, unsigned int size, uint8_t &err);
void fileWrite(uint8_t handle, const char *buff, unsigned int size, uint8_t &err)
{ fileWrite(handle, reinterpret_cast<const uint8_t *>(buff), size, err); }
void fileSeek(uint8_t handle, uint32_t position, uint8_t &err);
// Methods to handle mailbox messages
unsigned int readMessage(uint8_t *buffer, unsigned int size);
void writeMessage(const uint8_t *buffer, unsigned int size);
@ -79,20 +65,20 @@ public:
void flush() { stream.flush(); }
// Trasnfer a frame (with error correction and response)
uint8_t transfer(const uint8_t *buff1, uint16_t len1,
uint16_t transfer(const uint8_t *buff1, uint16_t len1,
const uint8_t *buff2, uint16_t len2,
const uint8_t *buff3, uint16_t len3,
uint8_t *rxbuff, uint16_t rxlen);
// multiple inline versions of the same function to allow efficient frame concatenation
uint8_t transfer(const uint8_t *buff1, uint16_t len1)
{ transfer(buff1, len1, NULL, 0); }
uint8_t transfer(const uint8_t *buff1, uint16_t len1,
uint16_t transfer(const uint8_t *buff1, uint16_t len1)
{ return transfer(buff1, len1, NULL, 0); }
uint16_t transfer(const uint8_t *buff1, uint16_t len1,
uint8_t *rxbuff, uint16_t rxlen)
{ transfer(buff1, len1, NULL, 0, rxbuff, rxlen); }
uint8_t transfer(const uint8_t *buff1, uint16_t len1,
{ return transfer(buff1, len1, NULL, 0, rxbuff, rxlen); }
uint16_t transfer(const uint8_t *buff1, uint16_t len1,
const uint8_t *buff2, uint16_t len2,
uint8_t *rxbuff, uint16_t rxlen)
{ transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen); }
{ return transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen); }
private:
uint8_t index;
int timedRead(unsigned int timeout);

63
libraries/Bridge/FileIO.cpp
View File

@ -24,11 +24,15 @@ File::File(BridgeClass &b) : mode(255), bridge(b) {
File::File(const char *_filename, uint8_t _mode, BridgeClass &b) : mode(_mode), bridge(b) {
filename = _filename;
uint8_t err;
char modes[] = {'r','w','a'};
handle = bridge.fileOpen(filename, modes[mode], err);
if (err != 0)
uint8_t cmd[] = {'F', modes[mode]};
uint8_t res[2];
bridge.transfer(cmd, 2, (uint8_t*)filename.c_str(), filename.length(), res, 2);
if (res[0] != 0) { // res[0] contains error code
mode = 255; // In case of error keep the file closed
return;
}
handle = res[1];
buffered = 0;
}
@ -47,10 +51,11 @@ size_t File::write(uint8_t c) {
size_t File::write(const uint8_t *buf, size_t size) {
if (mode == 255)
return -1;
uint8_t err;
bridge.fileWrite(handle, buf, size, err);
if (err != 0)
return -err;
uint8_t cmd[] = {'g', handle};
uint8_t res[1];
bridge.transfer(cmd, 2, buf, size, res, 1);
if (res[0] != 0) // res[0] contains error code
return -res[0];
return size;
}
@ -72,10 +77,23 @@ int File::peek() {
return buffer[readPos];
}
boolean File::seek(uint32_t pos) {
uint8_t err;
bridge.fileSeek(handle, pos, err);
return err==0;
boolean File::seek(uint32_t position) {
uint8_t cmd[] = {
's',
handle,
(position >> 24) & 0xFF,
(position >> 16) & 0xFF,
(position >> 8) & 0xFF,
position & 0xFF
};
uint8_t res[1];
bridge.transfer(cmd, 6, res, 1);
if (res[0]==0) {
// If seek succeed then flush buffers
buffered = 0;
return true;
}
return false;
}
void File::doBuffer() {
@ -85,8 +103,14 @@ void File::doBuffer() {
// Try to buffer up to 32 characters
readPos = 0;
uint8_t err;
buffered = bridge.fileRead(handle, buffer, sizeof(buffer), err);
uint8_t cmd[] = {'G', handle, sizeof(buffer)};
buffered = bridge.transfer(cmd, 3, buffer, sizeof(buffer)) - 1;
//err = buff[0]; // First byte is error code
if (buffered>0) {
// Shift the reminder of buffer
for (uint8_t i=0; i<buffered; i++)
buffer[i] = buffer[i+1];
}
}
int File::available() {
@ -99,13 +123,15 @@ void File::flush() {
}
//int read(void *buf, uint16_t nbyte)
//uint32_t position()
//uint32_t size()
void File::close() {
if (mode == 255)
return;
bridge.fileClose(handle);
uint8_t cmd[] = {'f', handle};
bridge.transfer(cmd, 2);
mode = 255;
}
@ -127,14 +153,7 @@ boolean SDClass::begin() {
}
File SDClass::open(const char *filename, uint8_t mode) {
// if (mode == FILE_READ) {
// if (exists(filename))
// return File(filename, mode);
// }
// if (mode == FILE_WRITE || mode == FILE_APPEND) {
return File(filename, mode);
// }
// return File();
return File(filename, mode);
}
boolean SDClass::exists(const char *filepath) {