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Code Issues Releases Activity

Sd2Card.cpp: fix compiler warning

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All the while() loops that check for the SPI transfer to be complete have the
semi-colon immediately after the closing parenthesis.  This both causes a
compiler warning of "warning: suggest a space before ';' or explicit braces
around empty body in 'while' statement", and is considered a less-than-ideal
programming practice.  This patch breaks the semi-colon on to the next line,
both eliminating the compiler error and making the code more readable.

In all probability the test should be moved into a macro or a inlineable
sub-routine.
This commit is contained in:
J.C. Wren 2010-12-20 22:52:24 -05:00 committed by Matthijs Kooijman
parent ece02e93bd
commit a991f26b8d
1 changed files with 20 additions and 10 deletions
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30
libraries/SD/src/utility/Sd2Card.cpp
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@ -30,7 +30,8 @@
static void spiSend(uint8_t b) {
#ifndef USE_SPI_LIB
SPDR = b;
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
#else
SPI.transfer(b);
#endif
@ -124,7 +125,8 @@ uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
spiSend(crc);
// wait for response
for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++);
for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++)
;
return status_;
}
//------------------------------------------------------------------------------
@ -383,18 +385,21 @@ uint8_t Sd2Card::readData(uint32_t block,
// skip data before offset
for (;offset_ < offset; offset_++) {
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
SPDR = 0XFF;
}
// transfer data
n = count - 1;
for (uint16_t i = 0; i < n; i++) {
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
dst[i] = SPDR;
SPDR = 0XFF;
}
// wait for last byte
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
dst[n] = SPDR;
#else // OPTIMIZE_HARDWARE_SPI
@ -429,11 +434,13 @@ void Sd2Card::readEnd(void) {
// optimize skip for hardware
SPDR = 0XFF;
while (offset_++ < 513) {
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
SPDR = 0XFF;
}
// wait for last crc byte
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
#else // OPTIMIZE_HARDWARE_SPI
while (offset_++ < 514) spiRec();
#endif // OPTIMIZE_HARDWARE_SPI
@ -602,14 +609,17 @@ uint8_t Sd2Card::writeData(uint8_t token, const uint8_t* src) {
// send two byte per iteration
for (uint16_t i = 0; i < 512; i += 2) {
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
SPDR = src[i];
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
SPDR = src[i+1];
}
// wait for last data byte
while (!(SPSR & (1 << SPIF)));
while (!(SPSR & (1 << SPIF)))
;
#else // OPTIMIZE_HARDWARE_SPI
spiSend(token);