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Hannes
2025-10-26 15:21:48 +01:00
parent 788ca8b1c0
commit 532c3fc295
21 changed files with 631 additions and 0 deletions
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1
arch/bsp/.gitignore vendored Normal file
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# empty gitignore

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arch/bsp/yellow_led.c Normal file
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#include <arch/bsp/yellow_led.h>
#include <stddef.h>
static constexpr unsigned int GPIO_BASE = 0x7E200000 - 0x3F000000;
static constexpr unsigned int YELLOW_LED = 7u;
static constexpr unsigned int GPF_BITS = 3u;
static constexpr unsigned int GPF_MASK = 0b111u;
static constexpr unsigned int YELLOW_LED_GPF_SHIFT = YELLOW_LED * GPF_BITS;
enum gpio_func {
gpio_input = 0x0,
gpio_output = 0x1,
};
struct gpio {
unsigned int func[6];
unsigned int unused0;
unsigned int set[2];
unsigned int unused1;
unsigned int clr[2];
};
static_assert(offsetof(struct gpio, func) == 0x00);
static_assert(offsetof(struct gpio, set) == 0x1C);
static_assert(offsetof(struct gpio, clr) == 0x28);
static volatile struct gpio *const gpio_port = (struct gpio *)GPIO_BASE;
void init_yellow(void)
{
gpio_port->func[0] = (gpio_port->func[0] & ~(GPF_MASK << YELLOW_LED_GPF_SHIFT)) |
(gpio_output << YELLOW_LED_GPF_SHIFT);
}
void yellow_on(void)
{
gpio_port->set[0] = 1 << YELLOW_LED;
}
void yellow_off(void)
{
gpio_port->clr[0] = 1 << YELLOW_LED;
}