diff options
Diffstat (limited to 'nuttx/configs/sam4e-ek/src/sam_boot.c')
| -rw-r--r-- | nuttx/configs/sam4e-ek/src/sam_boot.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/nuttx/configs/sam4e-ek/src/sam_boot.c b/nuttx/configs/sam4e-ek/src/sam_boot.c index 4bed7b2a2..5f6216366 100644 --- a/nuttx/configs/sam4e-ek/src/sam_boot.c +++ b/nuttx/configs/sam4e-ek/src/sam_boot.c @@ -47,7 +47,7 @@ #include "sam4e-ek.h" /************************************************************************************ - * Definitions + * Pre-processor Definitions ************************************************************************************/ /************************************************************************************ @@ -55,6 +55,31 @@ ************************************************************************************/ /************************************************************************************ + * Name: board_config_usart1 + * + * Description: + * USART1: To avoid any electrical conflict, the RS232 and RS485 transceiver are + * isolated from the receiving line PA21. + * + * - Chose RS485 channel: Close 1-2 pins on JP11 and set PA23 to high level + * - Chose RS232 channel: Close 2-3 pins on JP11 and set PA23 to low level + * + ************************************************************************************/ + +#ifdef CONFIG_SAM34_USART1 +static inline void board_config_usart1(void) +{ +#if defined(CONFIG_USART1_ISUART) + (void)sam_configgpio(GPIO_RS232_ENABLE); +#else /* if defined(CONFIG_USART1_RS485) */ + (void)sam_configgpio(GPIO_RS485_ENABLE); +#endif +} +#else +# define board_config_usart1() +#endif + +/************************************************************************************ * Public Functions ************************************************************************************/ @@ -70,6 +95,10 @@ void sam_boardinitialize(void) { + /* Configure USART1 for RS-232/RS-485 operation */ + + board_config_usart1(); + /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function * sam_spiinitialize() has been brought into the link. */ |