CPU specific definitions for internal peripheral handling. More...
Detailed Description
CPU specific definitions for internal peripheral handling.
Definition in file periph_cpu.h.
Include dependency graph for periph_cpu.h:Go to the source code of this file.
| #define | CLOCK_CORECLOCK (16780000U) /* 16.78MHz */ |
| Clock configuration. | |
Timer API defines | |
| #define | TIMER_NUMOF (4U) |
| Number of timers. | |
| #define | TIMER_CHANNEL_NUMOF (1U) |
| Number of channels. | |
| #define | TIMER_0_MAX_VALUE (0xffff) |
| max value | |
| #define | TIMER_1_MAX_VALUE (0xffff) |
| max value | |
| #define | TIMER_2_MAX_VALUE (0xffff) |
| max value | |
| #define | TIMER_3_MAX_VALUE (0xffff) |
| max value | |
| #define | PERIPH_TIMER_PROVIDES_SET |
| A low-level timer_set() implementation is provided. | |
Ztimer configuration | |
The timer runs at 262.2 kHz, 3.8 µs resolution, overflow IRQ every 250 ms (best case). A more precise option would be 16.78MHz, 60 ns resolution, overflow IRQ every 4 ms (best case) (which is too frequent for most applications). A less precise option would be 65.5 kHz, 15.2 µs resolution, overflow IRQ every 1 s (which is too slow compared to most other systems, might not match expectations). | |
| #define | CONFIG_ZTIMER_USEC_DEV (TIMER_DEV(0)) |
| Timer peripheral for ztimer. | |
| #define | CONFIG_ZTIMER_USEC_BASE_FREQ (GBA_TIMER_FRQ_262K) |
| Running at 262.2 kHz. | |
| #define | CONFIG_ZTIMER_USEC_WIDTH (16) |
| Running on a 16-bit timer. | |
| #define | CONFIG_ZTIMER_USEC_ADJUST_SET (308) |
| Overhead for ztimer_set. | |
| #define | CONFIG_ZTIMER_USEC_ADJUST_SLEEP (312) |
| Overhead for ztimer_sleep. | |
Macro Definition Documentation
◆ CLOCK_CORECLOCK
| #define CLOCK_CORECLOCK (16780000U) /* 16.78MHz */ |
Clock configuration.
Definition at line 29 of file periph_cpu.h.
◆ CONFIG_ZTIMER_USEC_ADJUST_SET
| #define CONFIG_ZTIMER_USEC_ADJUST_SET (308) |
Overhead for ztimer_set.
Definition at line 59 of file periph_cpu.h.
◆ CONFIG_ZTIMER_USEC_ADJUST_SLEEP
| #define CONFIG_ZTIMER_USEC_ADJUST_SLEEP (312) |
Overhead for ztimer_sleep.
Definition at line 60 of file periph_cpu.h.
◆ CONFIG_ZTIMER_USEC_BASE_FREQ
| #define CONFIG_ZTIMER_USEC_BASE_FREQ (GBA_TIMER_FRQ_262K) |
Running at 262.2 kHz.
Definition at line 57 of file periph_cpu.h.
◆ CONFIG_ZTIMER_USEC_DEV
| #define CONFIG_ZTIMER_USEC_DEV (TIMER_DEV(0)) |
Timer peripheral for ztimer.
Definition at line 56 of file periph_cpu.h.
◆ CONFIG_ZTIMER_USEC_WIDTH
| #define CONFIG_ZTIMER_USEC_WIDTH (16) |
Running on a 16-bit timer.
Definition at line 58 of file periph_cpu.h.
◆ PERIPH_TIMER_PROVIDES_SET
| #define PERIPH_TIMER_PROVIDES_SET |
A low-level timer_set() implementation is provided.
Definition at line 41 of file periph_cpu.h.
◆ TIMER_0_MAX_VALUE
| #define TIMER_0_MAX_VALUE (0xffff) |
max value
Definition at line 37 of file periph_cpu.h.
◆ TIMER_1_MAX_VALUE
| #define TIMER_1_MAX_VALUE (0xffff) |
max value
Definition at line 38 of file periph_cpu.h.
◆ TIMER_2_MAX_VALUE
| #define TIMER_2_MAX_VALUE (0xffff) |
max value
Definition at line 39 of file periph_cpu.h.
◆ TIMER_3_MAX_VALUE
| #define TIMER_3_MAX_VALUE (0xffff) |
max value
Definition at line 40 of file periph_cpu.h.
◆ TIMER_CHANNEL_NUMOF
| #define TIMER_CHANNEL_NUMOF (1U) |
Number of channels.
Definition at line 36 of file periph_cpu.h.
◆ TIMER_NUMOF
| #define TIMER_NUMOF (4U) |
Number of timers.
Definition at line 35 of file periph_cpu.h.
