diff options
| author | Dean Camera <dean@fourwalledcubicle.com> | 2011-09-02 04:38:56 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2011-09-02 04:38:56 +0000 |
| commit | 413438eb2330e8b2d9606a2936a169c9dd7916de (patch) | |
| tree | 05f869f3772a849ee4c1326164a46bfa08750382 /LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h | |
| parent | 88d022a75245e7492ecd11a5e1ea5c553acf0b2c (diff) | |
| download | lufa-413438eb2330e8b2d9606a2936a169c9dd7916de.tar.gz lufa-413438eb2330e8b2d9606a2936a169c9dd7916de.tar.bz2 lufa-413438eb2330e8b2d9606a2936a169c9dd7916de.zip | |
Add new TWI_BITLENGTH_FROM_FREQ() macro to the AVR8 TWI peripheral driver.
Change Delay_MS() to accept a 16-bit parameter rather than an 8-bit parameter for longer possible delays.
Minor documentation improvements.
Diffstat (limited to 'LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h')
| -rw-r--r-- | LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h b/LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h index d8216cd24..639b3c3b4 100644 --- a/LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h +++ b/LUFA/Drivers/Peripheral/AVR8/Serial_AVR8.h @@ -97,15 +97,23 @@ /* Public Interface - May be used in end-application: */ /* Macros: */ - /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is + /** Macro for calculating the baud value from a given baud rate when the \c U2X (double speed) bit is * not set. + * + * \param[in] Baud Target serial UART baud rate. + * + * \return Closest UBRR register value for the given UART frequency. */ - #define SERIAL_UBBRVAL(baud) ((((F_CPU / 16) + (baud / 2)) / (baud)) - 1) + #define SERIAL_UBBRVAL(Baud) ((((F_CPU / 16) + (Baud / 2)) / (Baud)) - 1) - /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is + /** Macro for calculating the baud value from a given baud rate when the \c U2X (double speed) bit is * set. + * + * \param[in] Baud Target serial UART baud rate. + * + * \return Closest UBRR register value for the given UART frequency. */ - #define SERIAL_2X_UBBRVAL(baud) ((((F_CPU / 8) + (baud / 2)) / (baud)) - 1) + #define SERIAL_2X_UBBRVAL(Baud) ((((F_CPU / 8) + (Baud / 2)) / (Baud)) - 1) /* Function Prototypes: */ /** Transmits a given string located in program space (FLASH) through the USART. |