diff options
Diffstat (limited to 'nuttx/arch/arm/src/sam34/sam_lowputc.c')
| -rw-r--r-- | nuttx/arch/arm/src/sam34/sam_lowputc.c | 162 |
1 files changed, 112 insertions, 50 deletions
diff --git a/nuttx/arch/arm/src/sam34/sam_lowputc.c b/nuttx/arch/arm/src/sam34/sam_lowputc.c index 00a3d3a89..55ab7555b 100644 --- a/nuttx/arch/arm/src/sam34/sam_lowputc.c +++ b/nuttx/arch/arm/src/sam34/sam_lowputc.c @@ -48,9 +48,19 @@ #include "up_arch.h" #include "sam_gpio.h" +#include "sam_periphclks.h" #include "sam_lowputc.h" -#include "chip/sam_pmc.h" -#include "chip/sam_uart.h" + +#if defined(CONFIG_ARCH_CHIP_SAM3U) +# include "chip/sam3u_uart.h" +#elif defined(CONFIG_ARCH_CHIP_SAM4L) +# include "chip/sam4l_usart.h" +#elif defined(CONFIG_ARCH_CHIP_SAM4S) +# include "chip/sam3u_uart.h" +#else +# error Unknown UART +#endif + #include "chip/sam_pinmap.h" /************************************************************************** @@ -76,40 +86,54 @@ # undef CONFIG_SAM34_USART3 #endif -/* Is there a serial console? It could be on the UART, or USARTn */ +/* Is there a serial console? It could be on UART0-1 or USART0-3 */ -#if defined(CONFIG_UART_SERIAL_CONSOLE) && defined(CONFIG_SAM34_UART) +#if defined(CONFIG_UART0_SERIAL_CONSOLE) && defined(CONFIG_SAM34_UART0) +# undef CONFIG_UART1_SERIAL_CONSOLE +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_UART1_SERIAL_CONSOLE) && defined(CONFIG_SAM34_UART1) +# undef CONFIG_UART0_SERIAL_CONSOLE # undef CONFIG_USART0_SERIAL_CONSOLE # undef CONFIG_USART1_SERIAL_CONSOLE # undef CONFIG_USART2_SERIAL_CONSOLE # undef CONFIG_USART3_SERIAL_CONSOLE # define HAVE_CONSOLE 1 #elif defined(CONFIG_USART0_SERIAL_CONSOLE) && defined(CONFIG_SAM34_USART0) -# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_UART0_SERIAL_CONSOLE +# undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_USART1_SERIAL_CONSOLE # undef CONFIG_USART2_SERIAL_CONSOLE # undef CONFIG_USART3_SERIAL_CONSOLE # define HAVE_CONSOLE 1 #elif defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_SAM34_USART1) -# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_UART0_SERIAL_CONSOLE +# undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_USART0_SERIAL_CONSOLE # undef CONFIG_USART2_SERIAL_CONSOLE # undef CONFIG_USART3_SERIAL_CONSOLE # define HAVE_CONSOLE 1 #elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_SAM34_USART2) -# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_UART0_SERIAL_CONSOLE +# undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_USART0_SERIAL_CONSOLE # undef CONFIG_USART1_SERIAL_CONSOLE # undef CONFIG_USART3_SERIAL_CONSOLE # define HAVE_CONSOLE 1 #elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_SAM34_USART3) -# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_UART0_SERIAL_CONSOLE +# undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_USART0_SERIAL_CONSOLE # undef CONFIG_USART1_SERIAL_CONSOLE # undef CONFIG_USART2_SERIAL_CONSOLE # define HAVE_CONSOLE 1 #else -# undef CONFIG_USART_SERIAL_CONSOLE +# warning "No valid CONFIG_USARTn_SERIAL_CONSOLE Setting" +# undef CONFIG_UART0_SERIAL_CONSOLE +# undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_USART0_SERIAL_CONSOLE # undef CONFIG_USART1_SERIAL_CONSOLE # undef CONFIG_USART2_SERIAL_CONSOLE @@ -117,14 +141,37 @@ # undef HAVE_CONSOLE #endif +/* Select MCU-specific settings + * + * For the SAM3U, the USARTs are driven by the main clock. + * For the SAM4L, the USARTs are driven by CLK_USART (undivided) which is + * selected by the PBADIVMASK register. + */ + +#if defined(CONFIG_ARCH_CHIP_SAM3U) || defined(CONFIG_ARCH_CHIP_SAM4S) +# define SAM_MR_USCLKS UART_MR_USCLKS_MCK /* Source = Main clock */ +# define SAM_USART_CLOCK BOARD_MCK_FREQUENCY /* Frequency of the main clock */ +#elif defined(CONFIG_ARCH_CHIP_SAM4L) +# define SAM_MR_USCLKS UART_MR_USCLKS_USART /* Source = USART_CLK (undefined) */ +# define SAM_USART_CLOCK BOARD_PBA_FREQUENCY /* PBA frequency is undivided */ +#else +# error Unrecognized SAM architecture +#endif + /* Select USART parameters for the selected console */ -#if defined(CONFIG_UART_SERIAL_CONSOLE) -# define SAM_CONSOLE_BASE SAM_UART_BASE -# define SAM_CONSOLE_BAUD CONFIG_UART_BAUD -# define SAM_CONSOLE_BITS CONFIG_UART_BITS -# define SAM_CONSOLE_PARITY CONFIG_UART_PARITY -# define SAM_CONSOLE_2STOP CONFIG_UART_2STOP +#if defined(CONFIG_UART0_SERIAL_CONSOLE) +# define SAM_CONSOLE_BASE SAM_UART0_BASE +# define SAM_CONSOLE_BAUD CONFIG_UART0_BAUD +# define SAM_CONSOLE_BITS CONFIG_UART0_BITS +# define SAM_CONSOLE_PARITY CONFIG_UART0_PARITY +# define SAM_CONSOLE_2STOP CONFIG_UART0_2STOP +#elif defined(CONFIG_UART1_SERIAL_CONSOLE) +# define SAM_CONSOLE_BASE SAM_UART1_BASE +# define SAM_CONSOLE_BAUD CONFIG_UART1_BAUD +# define SAM_CONSOLE_BITS CONFIG_UART1_BITS +# define SAM_CONSOLE_PARITY CONFIG_UART1_PARITY +# define SAM_CONSOLE_2STOP CONFIG_UART1_2STOP #elif defined(CONFIG_USART0_SERIAL_CONSOLE) # define SAM_CONSOLE_BASE SAM_USART0_BASE # define SAM_CONSOLE_BAUD CONFIG_USART0_BAUD @@ -156,15 +203,16 @@ /* Select the settings for the mode register */ #if SAM_CONSOLE_BITS == 5 -# define MR_CHRL_VALUE USART_MR_CHRL_5BITS /* 5 bits */ +# define MR_CHRL_VALUE UART_MR_CHRL_5BITS /* 5 bits */ #elif SAM_CONSOLE_BITS == 6 -# define MR_CHRL_VALUE USART_MR_CHRL_6BITS /* 6 bits */ +# define MR_CHRL_VALUE UART_MR_CHRL_6BITS /* 6 bits */ #elif SAM_CONSOLE_BITS == 7 -# define MR_CHRL_VALUE USART_MR_CHRL_7BITS /* 7 bits */ +# define MR_CHRL_VALUE UART_MR_CHRL_7BITS /* 7 bits */ #elif SAM_CONSOLE_BITS == 8 -# define MR_CHRL_VALUE USART_MR_CHRL_8BITS /* 8 bits */ -#elif SAM_CONSOLE_BITS == 9 && !defined(CONFIG_UART_SERIAL_CONSOLE) -# define MR_CHRL_VALUE USART_MR_MODE9 +# define MR_CHRL_VALUE UART_MR_CHRL_8BITS /* 8 bits */ +#elif SAM_CONSOLE_BITS == 9 && !defined(CONFIG_UART0_SERIAL_CONSOLE) && \ + !defined(CONFIG_UART1_SERIAL_CONSOLE) +# define MR_CHRL_VALUE UART_MR_MODE9 #else # error "Invlaid number of bits" #endif @@ -178,12 +226,12 @@ #endif #if SAM_CONSOLE_2STOP != 0 -# define MR_NBSTOP_VALUE USART_MR_NBSTOP_2 +# define MR_NBSTOP_VALUE UART_MR_NBSTOP_2 #else -# define MR_NBSTOP_VALUE USART_MR_NBSTOP_1 +# define MR_NBSTOP_VALUE UART_MR_NBSTOP_1 #endif -#define MR_VALUE (USART_MR_MODE_NORMAL | USART_MR_USCLKS_MCK | \ +#define MR_VALUE (UART_MR_MODE_NORMAL | SAM_MR_USCLKS | \ MR_CHRL_VALUE | MR_PAR_VALUE | MR_NBSTOP_VALUE) /************************************************************************** @@ -241,69 +289,81 @@ void up_lowputc(char ch) void sam_lowsetup(void) { - uint32_t regval; - /* Enable clocking for all selected UART/USARTs */ - regval = 0; -#ifdef CONFIG_SAM34_UART - regval |= (1 << SAM_PID_UART); +#ifdef CONFIG_SAM34_UART0 + sam_uart0_enableclk(); +#endif +#ifdef CONFIG_SAM34_UART1 + sam_uart1_enableclk(); #endif #ifdef CONFIG_SAM34_USART0 - regval |= (1 << SAM_PID_USART0); + sam_usart0_enableclk(); #endif #ifdef CONFIG_SAM34_USART1 - regval |= (1 << SAM_PID_USART1); + sam_usart1_enableclk(); #endif #ifdef CONFIG_SAM34_USART2 - regval |= (1 << SAM_PID_USART2); + sam_usart2_enableclk(); #endif #ifdef CONFIG_SAM34_USART3 - regval |= (1 << SAM_PID_USART3); + sam_usart3_enableclk(); #endif - putreg32(regval, SAM_PMC_PCER); /* Configure UART pins for all selected UART/USARTs */ -#ifdef CONFIG_SAM34_UART - (void)sam_configgpio(GPIO_UART_RXD); - (void)sam_configgpio(GPIO_UART_TXD); +#ifdef CONFIG_SAM34_UART0 + (void)sam_configgpio(GPIO_UART0_RXD); + (void)sam_configgpio(GPIO_UART0_TXD); #endif + +#ifdef CONFIG_SAM34_UART1 + (void)sam_configgpio(GPIO_UART1_RXD); + (void)sam_configgpio(GPIO_UART1_TXD); +#endif + #ifdef CONFIG_SAM34_USART0 (void)sam_configgpio(GPIO_USART0_RXD); (void)sam_configgpio(GPIO_USART0_TXD); +#ifdef CONFIG_USART0_OFLOWCONTROL (void)sam_configgpio(GPIO_USART0_CTS); +#endif +#ifdef CONFIG_USART0_IFLOWCONTROL (void)sam_configgpio(GPIO_USART0_RTS); #endif +#endif + #ifdef CONFIG_SAM34_USART1 (void)sam_configgpio(GPIO_USART1_RXD); (void)sam_configgpio(GPIO_USART1_TXD); +#ifdef CONFIG_USART1_OFLOWCONTROL (void)sam_configgpio(GPIO_USART1_CTS); +#endif +#ifdef CONFIG_USART1_IFLOWCONTROL (void)sam_configgpio(GPIO_USART1_RTS); #endif +#endif + #ifdef CONFIG_SAM34_USART2 (void)sam_configgpio(GPIO_USART2_RXD); (void)sam_configgpio(GPIO_USART2_TXD); +#ifdef CONFIG_USART2_OFLOWCONTROL (void)sam_configgpio(GPIO_USART2_CTS); +#endif +#ifdef CONFIG_USART2_IFLOWCONTROL (void)sam_configgpio(GPIO_USART2_RTS); #endif +#endif + #ifdef CONFIG_SAM34_USART3 (void)sam_configgpio(GPIO_USART3_RXD); (void)sam_configgpio(GPIO_USART3_TXD); +#ifdef CONFIG_USART3_OFLOWCONTROL (void)sam_configgpio(GPIO_USART3_CTS); - (void)sam_configgpio(GPIO_USART3_RTS); #endif - -#ifdef GPIO_CONSOLE_RXD -#endif -#ifdef GPIO_CONSOLE_TXD - (void)sam_configgpio(GPIO_CONSOLE_TXD); -#endif -#ifdef GPIO_CONSOLE_CTS - (void)sam_configgpio(GPIO_CONSOLE_CTS); +#ifdef CONFIG_USART3_IFLOWCONTROL + (void)sam_configgpio(GPIO_USART3_RTS); #endif -#ifdef GPIO_CONSOLE_RTS - (void)sam_configgpio(GPIO_CONSOLE_RTS); #endif /* Configure the console (only) */ @@ -321,9 +381,11 @@ void sam_lowsetup(void) putreg32(MR_VALUE, SAM_CONSOLE_BASE + SAM_UART_MR_OFFSET); - /* Configure the console baud */ + /* Configure the console baud. NOTE: Oversampling by 8 is not supported. + * This may limit BAUD rates for lower USART clocks. + */ - putreg32(((SAM_MCK_FREQUENCY + (SAM_CONSOLE_BAUD << 3))/(SAM_CONSOLE_BAUD << 4)), + putreg32(((SAM_USART_CLOCK + (SAM_CONSOLE_BAUD << 3)) / (SAM_CONSOLE_BAUD << 4)), SAM_CONSOLE_BASE + SAM_UART_BRGR_OFFSET); /* Enable receiver & transmitter */ |