#include <stdbool.h>#include <stdint.h>
Include dependency graph for system.h:
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
Macros | |
| #define | NTSC_COLORBURST_FREQ (315 * 1000000 / 88) |
| #define | PCE_SYSTEM_FREQ (NTSC_COLORBURST_FREQ * 6) |
| #define | PCE_CPU_FREQ (NTSC_COLORBURST_FREQ * 2) |
| #define | PCE_TIMER_FREQ (PCE_CPU_FREQ / 1024) |
| #define | PCE_FREQ_TO_TIMER(freq) ((PCE_TIMER_FREQ / (freq)) - 1) |
| Calculate the reload value for a given timer frequency (in Hz). More... | |
Functions | |
| void | pce_irq_enable (uint8_t mask) |
| Enable the specified IRQs. More... | |
| void | pce_irq_disable (uint8_t mask) |
| Disable the specified IRQs. More... | |
| void | pce_timer_set (uint8_t count) |
| Initialize the timer with a given reload value. More... | |
| void | pce_timer_enable (void) |
| Enable the timer. More... | |
| void | pce_timer_disable (void) |
| Disable the timer. More... | |
Detailed Description
Functionality related to the system.
Macro Definition Documentation
◆ NTSC_COLORBURST_FREQ
| #define NTSC_COLORBURST_FREQ (315 * 1000000 / 88) |
◆ PCE_CPU_FREQ
| #define PCE_CPU_FREQ (NTSC_COLORBURST_FREQ * 2) |
◆ PCE_FREQ_TO_TIMER
| #define PCE_FREQ_TO_TIMER | ( | freq | ) | ((PCE_TIMER_FREQ / (freq)) - 1) |
Calculate the reload value for a given timer frequency (in Hz).
◆ PCE_SYSTEM_FREQ
| #define PCE_SYSTEM_FREQ (NTSC_COLORBURST_FREQ * 6) |
◆ PCE_TIMER_FREQ
| #define PCE_TIMER_FREQ (PCE_CPU_FREQ / 1024) |
Function Documentation
◆ pce_irq_disable()
| void pce_irq_disable | ( | uint8_t | mask | ) |
Disable the specified IRQs.
- Parameters
-
mask The IRQ mask to disable.
◆ pce_irq_enable()
| void pce_irq_enable | ( | uint8_t | mask | ) |
Enable the specified IRQs.
Note that one must enable IRQs on the CPU for this to be effective; the console is initialized with IRQs disabled - see pce_cpu_irq_enable .
- Parameters
-
mask The IRQ mask to enable.
◆ pce_timer_disable()
| void pce_timer_disable | ( | void | ) |
Disable the timer.
◆ pce_timer_enable()
| void pce_timer_enable | ( | void | ) |
Enable the timer.
◆ pce_timer_set()
| void pce_timer_set | ( | uint8_t | count | ) |
Initialize the timer with a given reload value.
To calculate the reload value from a given frequency (in Hz), use the PCE_FREQ_TO_TIMER macro.
This function does not enable the timer automatically.
- Parameters
-
count The reload value.
