stm32: lowputc: nxstyle fixes
arch/arm/src/stm32/stm32_lowputc.c:
* nxstyle fixes, mostly for long lines and comment misalignments.
This commit is contained in:
Nathan Hartman
patacongo
parent
387d33c535
commit
5fe9085913
@ -218,7 +218,7 @@
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# endif
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# endif
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/* CR1 settings */
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/* CR1 settings */
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# if STM32_CONSOLE_BITS == 9
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# define USART_CR1_M_VALUE USART_CR1_M
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@ -249,7 +249,7 @@
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# define USART_CR1_SETBITS (USART_CR1_M_VALUE|USART_CR1_PARITY_VALUE)
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/* CR2 settings */
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/* CR2 settings */
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# if STM32_CONSOLE_2STOP != 0
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# define USART_CR2_STOP2_VALUE USART_CR2_STOP2
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@ -272,7 +272,7 @@
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# endif
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# define USART_CR2_SETBITS USART_CR2_STOP2_VALUE
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/* CR3 settings */
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/* CR3 settings */
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# if defined(CONFIG_STM32_STM32F30XX) || defined(CONFIG_STM32_STM32F33XX) || \
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defined(CONFIG_STM32_STM32F37XX)
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@ -289,33 +289,33 @@
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# endif
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# define USART_CR3_SETBITS 0
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/* Only the STM32 F3 supports oversampling by 8 */
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/* Only the STM32 F3 supports oversampling by 8 */
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# undef USE_OVER8
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/* Calculate USART BAUD rate divider */
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/* Calculate USART BAUD rate divider */
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# if defined(CONFIG_STM32_STM32F30XX) || defined(CONFIG_STM32_STM32F33XX) || \
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defined(CONFIG_STM32_STM32F37XX)
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/* Baud rate for standard USART (SPI mode included):
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*
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* In case of oversampling by 16, the equation is:
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* baud = fCK / UARTDIV
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* UARTDIV = fCK / baud
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*
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* In case of oversampling by 8, the equation is:
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*
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* baud = 2 * fCK / UARTDIV
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* UARTDIV = 2 * fCK / baud
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*/
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/* Baud rate for standard USART (SPI mode included):
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*
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* In case of oversampling by 16, the equation is:
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* baud = fCK / UARTDIV
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* UARTDIV = fCK / baud
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*
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* In case of oversampling by 8, the equation is:
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*
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* baud = 2 * fCK / UARTDIV
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* UARTDIV = 2 * fCK / baud
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*/
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# define STM32_USARTDIV8 \
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(((STM32_APBCLOCK << 1) + (STM32_CONSOLE_BAUD >> 1)) / STM32_CONSOLE_BAUD)
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# define STM32_USARTDIV16 \
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((STM32_APBCLOCK + (STM32_CONSOLE_BAUD >> 1)) / STM32_CONSOLE_BAUD)
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/* Use oversamply by 8 only if the divisor is small. But what is small? */
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/* Use oversamply by 8 only if the divisor is small. But what is small? */
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# if STM32_USARTDIV8 > 100
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# define STM32_BRR_VALUE STM32_USARTDIV16
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@ -327,47 +327,47 @@
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# else /* CONFIG_STM32_STM32F30XX */
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/* The baud rate for the receiver and transmitter (Rx and Tx) are both set
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* to the same value as programmed in the Mantissa and Fraction values of
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* USARTDIV.
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*
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* baud = fCK / (16 * usartdiv)
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* usartdiv = fCK / (16 * baud)
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*
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* Where fCK is the input clock to the peripheral (PCLK1 for USART2, 3, 4,
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* 5 or PCLK2 for USART1). Example, fCK=72MHz baud=115200,
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* usartdiv=39.0625=39 1/16th;
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*
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* First calculate:
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*
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* usartdiv32 = 32 * usartdiv = fCK / (baud/2)
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*
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* (NOTE: all standard baud values are even so dividing by two does not
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* lose precision). Eg. (same fCK and baud), usartdiv32 = 1250
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*/
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/* The baud rate for the receiver and transmitter (Rx and Tx) are both set
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* to the same value as programmed in the Mantissa and Fraction values of
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* USARTDIV.
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*
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* baud = fCK / (16 * usartdiv)
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* usartdiv = fCK / (16 * baud)
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*
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* Where fCK is the input clock to the peripheral (PCLK1 for USART2, 3, 4,
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* 5 or PCLK2 for USART1). Example, fCK=72MHz baud=115200,
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* usartdiv=39.0625=39 1/16th;
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*
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* First calculate:
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*
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* usartdiv32 = 32 * usartdiv = fCK / (baud/2)
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*
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* (NOTE: all standard baud values are even so dividing by two does not
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* lose precision). Eg. (same fCK and baud), usartdiv32 = 1250
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*/
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# define STM32_USARTDIV32 (STM32_APBCLOCK / (STM32_CONSOLE_BAUD >> 1))
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/* The mantissa is then usartdiv32 / 32:
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*
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* mantissa = usartdiv32 / 32/
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*
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* Eg. usartdiv32=1250, mantissa = 39
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*/
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/* The mantissa is then usartdiv32 / 32:
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*
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* mantissa = usartdiv32 / 32/
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*
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* Eg. usartdiv32=1250, mantissa = 39
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*/
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# define STM32_MANTISSA (STM32_USARTDIV32 >> 5)
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/* And the fraction:
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*
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* fraction = (usartdiv32 - mantissa*32 + 1) / 2
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*
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* Eg., (1,250 - 39*32 + 1)/2 = 1 (or 0.0625)
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*/
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/* And the fraction:
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*
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* fraction = (usartdiv32 - mantissa*32 + 1) / 2
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*
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* Eg., (1,250 - 39*32 + 1)/2 = 1 (or 0.0625)
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*/
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# define STM32_FRACTION \
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((STM32_USARTDIV32 - (STM32_MANTISSA << 5) + 1) >> 1)
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/* And, finally, the BRR value is: */
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/* And, finally, the BRR value is: */
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# define STM32_BRR_VALUE \
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((STM32_MANTISSA << USART_BRR_MANT_SHIFT) | \
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@ -413,9 +413,11 @@ void arm_lowputc(char ch)
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#ifdef HAVE_CONSOLE
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/* Wait until the TX data register is empty */
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) & USART_SR_TC) == 0);
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) &
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USART_SR_TC) == 0);
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#ifdef STM32_CONSOLE_RS485_DIR
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, STM32_CONSOLE_RS485_DIR_POLARITY);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR,
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STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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/* Then send the character */
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@ -423,8 +425,10 @@ void arm_lowputc(char ch)
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putreg32((uint32_t)ch, STM32_CONSOLE_BASE + STM32_USART_TDR_OFFSET);
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#ifdef STM32_CONSOLE_RS485_DIR
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) & USART_SR_TC) == 0);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) &
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USART_SR_TC) == 0);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR,
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!STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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#endif /* HAVE_CONSOLE */
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@ -497,8 +501,8 @@ void stm32_lowsetup(void)
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/* Assume default pin mapping:
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*
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* Alternate USART3_REMAP[1:0] USART3_REMAP[1:0] USART3_REMAP[1:0]
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* Function = “00” (no remap) = “01” (partial remap) = “11” (full remap)
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* ---------_ ------------------ ---------------------- --------------------
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* Function = 00 (no remap) = 01 (partial remap) = 11 (full remap)
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* ---------_ ------------------ ---------------------- -----------------
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* USART3_TX PB10 PC10 PD8
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* USART3_RX PB11 PC11 PD9
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* USART3_CK PB12 PC12 PD10
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@ -529,7 +533,8 @@ void stm32_lowsetup(void)
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#ifdef STM32_CONSOLE_RS485_DIR
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stm32_configgpio(STM32_CONSOLE_RS485_DIR);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR,
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!STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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/* Enable and configure the selected console device */
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@ -601,7 +606,8 @@ void stm32_lowsetup(void)
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#ifdef STM32_CONSOLE_RS485_DIR
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stm32_configgpio(STM32_CONSOLE_RS485_DIR);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR,
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!STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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/* Enable and configure the selected console device */
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