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stm32f4: Add support for full range of GPIO pins

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-07-28 11:53:28 -04:00
parent bc9c8cd7a0
commit 9bc3a29ee4
3 changed files with 44 additions and 30 deletions
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37
src/stm32f4/gpio.c
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@ -14,28 +14,22 @@
DECL_ENUMERATION_RANGE("pin", "PA0", GPIO('A', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PB0", GPIO('B', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PC0", GPIO('C', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PD0", GPIO('D', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PE0", GPIO('E', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PF0", GPIO('F', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PG0", GPIO('G', 0), 32);
DECL_ENUMERATION_RANGE("pin", "PH0", GPIO('H', 0), 32);
#ifdef GPIOI
DECL_ENUMERATION_RANGE("pin", "PI0", GPIO('I', 0), 32);
#endif
static GPIO_TypeDef * const digital_regs[] = {
GPIOA, GPIOB, GPIOC
GPIO_TypeDef * const digital_regs[] = {
GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH,
#ifdef GPIOI
GPIOI,
#endif
};
// Set the mode and extended function of a pin
void
gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup)
{
GPIO_TypeDef *regs = digital_regs[GPIO2PORT(gpio)];
uint32_t mode_bits = mode & 0x0f, func = mode >> 4;
uint32_t pup = pullup ? (pullup > 0 ? 1 : 2) : 0;
uint32_t pos = gpio % 16, af_reg = pos / 8;
uint32_t af_shift = (pos % 8) * 4, af_msk = 0x0f << af_shift;
uint32_t m_shift = pos * 2, m_msk = 0x03 << m_shift;
regs->AFR[af_reg] = (regs->AFR[af_reg] & ~af_msk) | (func << af_shift);
regs->MODER = (regs->MODER & ~m_msk) | (mode_bits << m_shift);
regs->PUPDR = (regs->PUPDR & ~m_msk) | (pup << m_shift);
regs->OSPEEDR = (regs->OSPEEDR & ~m_msk) | (0x02 << m_shift);
}
// Convert a register and bit location back to an integer pin identifier
static int
regs_to_pin(GPIO_TypeDef *regs, uint32_t bit)
@ -47,11 +41,6 @@ regs_to_pin(GPIO_TypeDef *regs, uint32_t bit)
return 0;
}
/****************************************************************
* General Purpose Input Output (GPIO) pins
****************************************************************/
struct gpio_out
gpio_out_setup(uint32_t pin, uint32_t val)
{