diff options
| author | jaseg <git-bigdata-wsl-arch@jaseg.de> | 2020-05-04 21:31:31 +0200 |
|---|---|---|
| committer | jaseg <git-bigdata-wsl-arch@jaseg.de> | 2020-05-04 21:31:31 +0200 |
| commit | 9918eb505321183e20357221a4dcf2aa9c1e057c (patch) | |
| tree | 41e33e84d51ca2aa558ab1dc248ec5109181d6c8 /controller/fw/src/gpio_helpers.c | |
| parent | 82c1302756d9b8f3d5cfbd4b304411c39651dfa8 (diff) | |
| download | master-thesis-9918eb505321183e20357221a4dcf2aa9c1e057c.tar.gz master-thesis-9918eb505321183e20357221a4dcf2aa9c1e057c.tar.bz2 master-thesis-9918eb505321183e20357221a4dcf2aa9c1e057c.zip | |
fw: add working reed-solomon encoder/decoder
Diffstat (limited to 'controller/fw/src/gpio_helpers.c')
| -rw-r--r-- | controller/fw/src/gpio_helpers.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/controller/fw/src/gpio_helpers.c b/controller/fw/src/gpio_helpers.c new file mode 100644 index 0000000..07b9a33 --- /dev/null +++ b/controller/fw/src/gpio_helpers.c @@ -0,0 +1,46 @@ + +#include "gpio_helpers.h" + +void gpio_pin_mode(GPIO_TypeDef *gpio, int pin, int mode) { + gpio->MODER &= ~(3 << (2*pin)); + gpio->MODER |= mode << (2*pin); +} + +void gpio_pin_setup(GPIO_TypeDef *gpio, int pin, int mode, int speed, int pullups, int afsel) { + int gpio_idx = ((uint32_t)gpio>>10) & 0xf; + RCC->AHB1ENR |= 1<<gpio_idx; + + gpio->MODER &= ~(3 << (2*pin)); + gpio->MODER |= mode << (2*pin); + gpio->OSPEEDR &= ~(3 << (2*pin)); + gpio->OSPEEDR |= speed << (2*pin); + gpio->PUPDR &= ~(3 << (2*pin)); + gpio->PUPDR |= pullups << (2*pin); + gpio->AFR[pin>>3] &= ~(0xf << (4*(pin&7))); + gpio->AFR[pin>>3] |= afsel << (4*(pin&7)); + gpio->BSRR = 1<<pin<<16; +} + +void gpio_pin_output(GPIO_TypeDef *gpio, int pin, int speed) { + gpio_pin_setup(gpio, pin, 1, speed, 0, 0); +} + +void gpio_pin_tristate(GPIO_TypeDef *gpio, int pin, int tristate) { + if (tristate) + gpio->MODER &= ~(3 << (2*pin)); + else + gpio->MODER |= 1 << (2*pin); +} + +void gpio_pin_input(GPIO_TypeDef *gpio, int pin, int pullups) { + gpio_pin_setup(gpio, pin, 0, 0, pullups, 0); +} + +void gpio_pin_af(GPIO_TypeDef *gpio, int pin, int speed, int pullups, int afsel) { + gpio_pin_setup(gpio, pin, 2, speed, pullups, afsel); +} + +void gpio_pin_analog(GPIO_TypeDef *gpio, int pin) { + gpio_pin_setup(gpio, pin, 3, 0, 0, 0); +} + |