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sam4e8e: Add support for gpio_x_reset() 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-08-20 16:52:43 -04:00
parent 109eff0191
commit eec58b99fe
2 changed files with 42 additions and 34 deletions
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68
src/sam4e8e/gpio.c
View File

@ -74,29 +74,33 @@ gpio_out_setup(uint8_t pin, uint8_t val)
goto fail;
uint32_t port = GPIO2PORT(pin);
Pio *regs = digital_regs[port];
uint32_t bit = GPIO2BIT(pin);
uint32_t bank_id = ID_PIOA + port;
irqstatus_t flag = irq_save();
if ((PMC->PMC_PCSR0 & (1u << bank_id)) == 0) {
PMC->PMC_PCER0 = 1 << bank_id;
}
if (val)
regs->PIO_SODR = bit;
else
regs->PIO_CODR = bit;
regs->PIO_OER = bit;
regs->PIO_OWER = bit;
regs->PIO_PER = bit;
irq_restore(flag);
return (struct gpio_out){ .pin=pin, .regs=regs, .bit=bit };
struct gpio_out g = { .regs=regs, .bit=GPIO2BIT(pin) };
gpio_out_reset(g, val);
return g;
fail:
shutdown("Not an output pin");
}
void
gpio_out_reset(struct gpio_out g, uint8_t val)
{
Pio *regs = g.regs;
irqstatus_t flag = irq_save();
if (val)
regs->PIO_SODR = g.bit;
else
regs->PIO_CODR = g.bit;
regs->PIO_OER = g.bit;
regs->PIO_OWER = g.bit;
regs->PIO_PER = g.bit;
regs->PIO_PUDR = g.bit;
irq_restore(flag);
}
void
gpio_out_toggle_noirq(struct gpio_out g)
{
@ -129,30 +133,32 @@ gpio_in_setup(uint8_t pin, int8_t pull_up)
goto fail;
uint32_t port = GPIO2PORT(pin);
Pio *regs = digital_regs[port];
uint32_t bit = GPIO2BIT(pin);
uint32_t bank_id = ID_PIOA + port;
regs->PIO_IDR = bit;
irqstatus_t flag = irq_save();
if ((PMC->PMC_PCSR0 & (1u << bank_id)) == 0) {
PMC->PMC_PCER0 = 1 << bank_id;
}
if (pull_up)
regs->PIO_PUER = bit;
else
regs->PIO_PUDR = bit;
regs->PIO_ODR = bit;
regs->PIO_PER = bit;
irq_restore(flag);
return (struct gpio_in){ .pin=pin, .regs=regs, .bit=bit };
struct gpio_in g = { .regs=regs, .bit=GPIO2BIT(pin) };
gpio_in_reset(g, pull_up);
return g;
fail:
shutdown("Not an input pin");
}
void
gpio_in_reset(struct gpio_in g, int8_t pull_up)
{
Pio *regs = g.regs;
irqstatus_t flag = irq_save();
regs->PIO_IDR = g.bit;
if (pull_up)
regs->PIO_PUER = g.bit;
else
regs->PIO_PUDR = g.bit;
regs->PIO_ODR = g.bit;
regs->PIO_PER = g.bit;
irq_restore(flag);
}
uint8_t
gpio_in_read(struct gpio_in g)
{

8
src/sam4e8e/gpio.h
View File

@ -11,6 +11,7 @@ struct gpio_out {
void gpio_set_peripheral(char bank, uint32_t bit, char ptype, uint32_t pull_up);
struct gpio_out gpio_out_setup(uint8_t pin, uint8_t val);
void gpio_out_reset(struct gpio_out g, uint8_t val);
void gpio_out_toggle_noirq(struct gpio_out g);
void gpio_out_toggle(struct gpio_out g);
void gpio_out_write(struct gpio_out g, uint8_t val);
@ -21,15 +22,16 @@ struct gpio_in {
uint32_t bit;
};
struct gpio_in gpio_in_setup(uint8_t pin, int8_t pull_up);
void gpio_in_reset(struct gpio_in g, int8_t pull_up);
uint8_t gpio_in_read(struct gpio_in g);
struct gpio_adc {
uint8_t pin;
void *afec;
uint32_t chan;
};
struct gpio_in gpio_in_setup(uint8_t pin, int8_t pull_up);
uint8_t gpio_in_read(struct gpio_in g);
struct gpio_adc gpio_pin_to_afec(uint8_t pin);
struct gpio_adc gpio_adc_setup(uint8_t pin);
uint32_t gpio_adc_sample(struct gpio_adc g);