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More coding-style and cosmetic fixes.

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This commit is contained in:
Uwe Hermann
2012-02-06 23:39:06 +01:00
parent 5f82f28d01
commit 9532195e65
10 changed files with 56 additions and 55 deletions
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26
lib/stm32/usart.c
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@@ -47,15 +47,16 @@ void usart_set_baudrate(u32 usart, u32 baud)
#endif
*/
/* yes it is as simple as that. The reference manual is
* talking about factional calculation but it seems to be only
* marketting bable to sound awesome. It is nothing else but a
* simple divider to generate the correct baudrate. >_< If I
* am wrong feel free to correct me on that. :) (esden)
*
* Changed to round rather than floor (Fergus)
/*
* Yes it is as simple as that. The reference manual is
* talking about fractional calculation but it seems to be only
* marketting babble to sound awesome. It is nothing else but a
* simple divider to generate the correct baudrate.
*
* Note: We round() the value rather than floor()ing it, for more
* accurate divisor selection.
*/
USART_BRR(usart) = (2*clock + baud) / (2*baud);
USART_BRR(usart) = ((2 * clock) + baud) / (2 * baud);
}
void usart_set_databits(u32 usart, u32 bits)
@@ -151,21 +152,20 @@ u16 usart_recv_blocking(u32 usart)
void usart_enable_rx_dma(u32 usart)
{
USART_CR3(usart) |= USART_CR3_DMAR;
USART_CR3(usart) |= USART_CR3_DMAR;
}
void usart_disable_rx_dma(u32 usart)
{
USART_CR3(usart) &= ~USART_CR3_DMAR;
USART_CR3(usart) &= ~USART_CR3_DMAR;
}
void usart_enable_tx_dma(u32 usart)
{
USART_CR3(usart) |= USART_CR3_DMAT;
USART_CR3(usart) |= USART_CR3_DMAT;
}
void usart_disable_tx_dma(u32 usart)
{
USART_CR3(usart) &= ~USART_CR3_DMAT;
USART_CR3(usart) &= ~USART_CR3_DMAT;
}