diff options
Diffstat (limited to 'gpio')
| -rw-r--r-- | gpio/gpio.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gpio/gpio.h b/gpio/gpio.h index 9d95b1d..705f3cf 100644 --- a/gpio/gpio.h +++ b/gpio/gpio.h @@ -143,14 +143,56 @@ class GPIO_t { } }; + class PinArray { + private: + const GPIO_t& g; + int f; + int l; + + constexpr uint32_t mask1() { + return ((2 << l) - 1) ^ ((1 << f) - 1); + } + + constexpr uint32_t mask2() { + return ((4 << (l * 2)) - 1) ^ ((1 << (f * 2)) - 1); + } + + public: + constexpr PinArray(const GPIO_t& gpio, int first, int last) : g(gpio), f(first), l(last) {} + + #if defined(STM32F3) || defined(STM32F4) + void set_mode(Pin::Mode m) { + g.reg.MODER = (g.reg.MODER & ~mask2()) | ((0x55555555 * m) & mask2()); + } + + void set_pull(Pin::Pull p) { + g.reg.PUPDR = (g.reg.PUPDR & ~mask2()) | ((0x55555555 * p) & mask2()); + } + #endif + + void set(uint16_t value) { + value <<= f; + g.reg.BSRR = ((~value & mask1()) << 16) | (value & mask1()); + } + + uint16_t get() { + return g.reg.IDR & mask1(); + } + }; + constexpr GPIO_t(uint32_t reg_addr) : reg(*(GPIO_reg_t*)reg_addr) {} constexpr Pin operator[](int pin) { return Pin(*this, pin); } + + constexpr PinArray array(int first, int last) { + return PinArray(*this, first, last); + } }; typedef GPIO_t::Pin Pin; +typedef GPIO_t::PinArray PinArray; #if defined(STM32F1) static GPIO_t GPIOA(0x40010800); |