diff options
Diffstat (limited to '')
| -rw-r--r-- | sw/z80/kernel/drivers/pio.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/sw/z80/kernel/drivers/pio.c b/sw/z80/kernel/drivers/pio.c index 289ebe0..4321fb8 100644 --- a/sw/z80/kernel/drivers/pio.c +++ b/sw/z80/kernel/drivers/pio.c @@ -3,17 +3,38 @@ static uint8_t *pio_port = (uint8_t *) ADDR_DEV_PIO; static uint8_t *pio_ctrl = (uint8_t *) (ADDR_DEV_PIO + 2); -void _pio_data(int port, uint8_t data) +inline void _pio_data(int port, uint8_t data) { *(pio_port + port) = data; } -void _pio_command(int port, uint8_t cmd) +inline void _pio_control(int port, uint8_t cmd) { *(pio_ctrl + port) = cmd; } -/* void pio_set_mode(int port, int mode) +void pio_set_mode(int port, int mode, uint8_t io) { + // 0x0F is a control sequence to set mode + _pio_control(port, ((mode << 6) | 0x0F)); -} */ + // this mode requires an additional argument that sets + // a mode for each pin + if (mode == PIO_MODE_BIT_IO) { + _pio_control(port, io); + } +} + +void pio_set_interrupts(int port, int control) +{ + // 0x07 is a control sequence to set interrupts + _pio_control(port, (control | 0x07)); +} + +void pio_set_interrupts_mask(int port, int control, uint8_t mask) +{ + // 0x17 is a control sequence to set interrupts + // and to interpret the next byte as a mask + _pio_control(port, (control | 0x17)); + _pio_control(port, mask); +} |