diff options
Diffstat (limited to 'nuttx/arch/arm/src/lm3s/chip.h')
| -rw-r--r-- | nuttx/arch/arm/src/lm3s/chip.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/lm3s/chip.h b/nuttx/arch/arm/src/lm3s/chip.h index a5175a49f..f6ff0c16a 100644 --- a/nuttx/arch/arm/src/lm3s/chip.h +++ b/nuttx/arch/arm/src/lm3s/chip.h @@ -53,6 +53,16 @@ * Definitions ************************************************************************************/ +/* The LM3S6918 only supports 8 priority levels. The hardware priority mechanism + * will only look at the upper N bits of the 8-bit priority level (where N is 3 for + * the Stellaris family), so any prioritization must be performed in those bits. + * The default priority level is set to the middle value + */ + +#define NVIC_SYSH_PRIORITY_MIN 0x00 +#define NVIC_SYSH_PRIORITY_DEFAULT 0x80 +#define NVIC_SYSH_PRIORITY_MAX 0xe0 + /************************************************************************************ * Public Types ************************************************************************************/ |