diff options
Diffstat (limited to 'nuttx/arch/arm/include/lpc17xx')
| -rw-r--r-- | nuttx/arch/arm/include/lpc17xx/chip.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/nuttx/arch/arm/include/lpc17xx/chip.h b/nuttx/arch/arm/include/lpc17xx/chip.h index d2c436d35..c22c6aa60 100644 --- a/nuttx/arch/arm/include/lpc17xx/chip.h +++ b/nuttx/arch/arm/include/lpc17xx/chip.h @@ -362,6 +362,20 @@ # error "Unsupported LPC17xx chip" #endif +/* NVIC priority levels *************************************************************/ +/* Each priority field holds a priority value, 0-31. The lower the value, the greater + * the priority of the corresponding interrupt. The processor implements only + * bits[7:3] of each field, bits[2:0] read as zero and ignore writes. + */ + +#define NVIC_SYSH_PRIORITY_MIN 0xf8 /* All bits[7:3] set is minimum priority */ +#define NVIC_SYSH_PRIORITY_DEFAULT 0x80 /* Midpoint is the default */ +#define NVIC_SYSH_PRIORITY_MAX 0x00 /* Zero is maximum priority */ +#define NVIC_SYSH_PRIORITY_STEP 0x08 /* Five bits of interrupt priority used */ + +#define NVIC_SYSH_DISABLE_PRIORITY (NVIC_SYSH_PRIORITY_MAX + NVIC_SYSH_PRIORITY_STEP) +#define NVIC_SYSH_SVCALL_PRIORITY NVIC_SYSH_PRIORITY_MAX + /************************************************************************************ * Public Types ************************************************************************************/ |