diff options
Diffstat (limited to 'nuttx/arch/arm/src/lm3s/lm3s_gpio.h')
| -rw-r--r-- | nuttx/arch/arm/src/lm3s/lm3s_gpio.h | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/nuttx/arch/arm/src/lm3s/lm3s_gpio.h b/nuttx/arch/arm/src/lm3s/lm3s_gpio.h index 78a66d6af..4c1ac407e 100644 --- a/nuttx/arch/arm/src/lm3s/lm3s_gpio.h +++ b/nuttx/arch/arm/src/lm3s/lm3s_gpio.h @@ -50,7 +50,6 @@ /* GPIO Register Offsets ************************************************************/ #ifdef CONFIG_ARCH_CHIP_LM3S6918 - # define LM3S_GPIO_DATA_OFFSET 0x000 /* GPIO Data */ # define LM3S_GPIO_DIR_OFFSET 0x400 /* GPIO Direction */ # define LM3S_GPIO_IS_OFFSET 0x404 /* GPIO Interrupt Sense */ @@ -355,20 +354,56 @@ /* Bit-encoded input to lm3s_configgpio() *******************************************/ -#define GPIO_DIR_MASK (1 << 31) /* GPIO direction */ +#define GPIO_DIR_MASK (1 << 31) /* Bit 31: GPIO direction */ #define GPIO_DIR_OUTPUT (1 << 31) #define GPIO_DIR_INPUT (0 << 31) -#define GPIO_VALUE_MASK (1 << 6) /* If output, inital value of output */ +#define GPIO_VALUE_MASK (1 << 6) /* Bit 6: If output, inital value of output */ #define GPIO_VALUE_ONE (1 << 6) #define GPIO_VALUE_ZERO (0 << 6) -#define GPIO_NUMBER_MASK (0x3f) /* GPIO number: 0-63 */ +#define GPIO_PORT_SHIFT 3 /* Bit 3-5: Port number */ +#define GPIO_PORT_MASK (0x07 << GPIO_PORT_SHIFT) +#define GPIO_PORTA (0 << GPIO_PORT_SHIFT) +#define GPIO_PORTB (1 << GPIO_PORT_SHIFT) +#define GPIO_PORTC (2 << GPIO_PORT_SHIFT) +#define GPIO_PORTD (3 << GPIO_PORT_SHIFT) +#define GPIO_PORTE (4 << GPIO_PORT_SHIFT) +#define GPIO_PORTF (5 << GPIO_PORT_SHIFT) +#define GPIO_PORTG (6 << GPIO_PORT_SHIFT) +#define GPIO_PORTH (7 << GPIO_PORT_SHIFT) + +#define GPIO_NUMBER_SHIFT 0 /* Bits 0-2: GPIO number: 0-7 */ +#define GPIO_NUMBER_MASK (0x07 << GPIO_NUMBER_SHIFT) /************************************************************************************ * Public Types ************************************************************************************/ +#ifndef __ASSEMBLY__ + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +static inline uint32 lm3s_gpiobaseaddress(unsigned int port) +{ +#ifdef CONFIG_ARCH_CHIP_LM3S6918 + unsigned int portno = (port >> GPIO_PORT_SHIFT) & 7; + if (portno < 4) + { + return LM3S_GPIOA_BASE + 0x1000 * portno; + } + else + { + return LM3S_GPIOE_BASE + 0x1000 * portno; + } +#else +# error "GPIO register base addresses not known for this LM3S chip" + return 0; +#endif +} + /************************************************************************************ * Public Data ************************************************************************************/ @@ -394,4 +429,5 @@ EXTERN int lm3s_configgpio(uint32 bitset); } #endif +#endif /* __ASSEMBLY__ */ #endif /* __ARCH_ARM_SRC_LM3S_LM3S_GPIO_H */ |