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36 lines
869 B
36 lines
869 B
8 years ago
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void set_gpio_mode(GPIO_TypeDef *GPIO, int pin, int mode) {
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uint32_t tmp = GPIO->MODER;
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tmp &= ~(3 << (pin*2));
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tmp |= (mode << (pin*2));
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GPIO->MODER = tmp;
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}
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void set_gpio_output(GPIO_TypeDef *GPIO, int pin, int val) {
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if (val) {
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GPIO->ODR |= (1 << pin);
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} else {
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GPIO->ODR &= ~(1 << pin);
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}
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set_gpio_mode(GPIO, pin, MODE_OUTPUT);
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}
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void set_gpio_alternate(GPIO_TypeDef *GPIO, int pin, int mode) {
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uint32_t tmp = GPIO->AFR[pin>>3];
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tmp &= ~(0xF << ((pin&7)*4));
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tmp |= mode << ((pin&7)*4);
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GPIO->AFR[pin>>3] = tmp;
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set_gpio_mode(GPIO, pin, MODE_ALTERNATE);
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}
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void set_gpio_pullup(GPIO_TypeDef *GPIO, int pin, int mode) {
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uint32_t tmp = GPIO->PUPDR;
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tmp &= ~(3 << (pin*2));
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tmp |= (mode << (pin*2));
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GPIO->PUPDR = tmp;
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}
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int get_gpio_input(GPIO_TypeDef *GPIO, int pin) {
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return (GPIO->IDR & (1 << pin)) == (1 << pin);
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}
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