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-rw-r--r--libmaple/gpio.c151
1 files changed, 2 insertions, 149 deletions
diff --git a/libmaple/gpio.c b/libmaple/gpio.c
index e607595..64b2d54 100644
--- a/libmaple/gpio.c
+++ b/libmaple/gpio.c
@@ -26,76 +26,14 @@
/**
* @file gpio.c
- * @brief GPIO initialization routine
+ * @brief Generic STM32 GPIO support.
*/
#include <libmaple/gpio.h>
#include <libmaple/rcc.h>
/*
- * GPIO devices
- */
-
-gpio_dev gpioa = {
- .regs = GPIOA_BASE,
- .clk_id = RCC_GPIOA,
- .exti_port = AFIO_EXTI_PA,
-};
-/** GPIO port A device. */
-gpio_dev* const GPIOA = &gpioa;
-
-gpio_dev gpiob = {
- .regs = GPIOB_BASE,
- .clk_id = RCC_GPIOB,
- .exti_port = AFIO_EXTI_PB,
-};
-/** GPIO port B device. */
-gpio_dev* const GPIOB = &gpiob;
-
-gpio_dev gpioc = {
- .regs = GPIOC_BASE,
- .clk_id = RCC_GPIOC,
- .exti_port = AFIO_EXTI_PC,
-};
-/** GPIO port C device. */
-gpio_dev* const GPIOC = &gpioc;
-
-gpio_dev gpiod = {
- .regs = GPIOD_BASE,
- .clk_id = RCC_GPIOD,
- .exti_port = AFIO_EXTI_PD,
-};
-/** GPIO port D device. */
-gpio_dev* const GPIOD = &gpiod;
-
-#ifdef STM32_HIGH_DENSITY
-gpio_dev gpioe = {
- .regs = GPIOE_BASE,
- .clk_id = RCC_GPIOE,
- .exti_port = AFIO_EXTI_PE,
-};
-/** GPIO port E device. */
-gpio_dev* const GPIOE = &gpioe;
-
-gpio_dev gpiof = {
- .regs = GPIOF_BASE,
- .clk_id = RCC_GPIOF,
- .exti_port = AFIO_EXTI_PF,
-};
-/** GPIO port F device. */
-gpio_dev* const GPIOF = &gpiof;
-
-gpio_dev gpiog = {
- .regs = GPIOG_BASE,
- .clk_id = RCC_GPIOG,
- .exti_port = AFIO_EXTI_PG,
-};
-/** GPIO port G device. */
-gpio_dev* const GPIOG = &gpiog;
-#endif
-
-/*
- * GPIO convenience routines
+ * GPIO routines
*/
/**
@@ -109,88 +47,3 @@ void gpio_init(gpio_dev *dev) {
rcc_clk_enable(dev->clk_id);
rcc_reset_dev(dev->clk_id);
}
-
-/**
- * Initialize and reset all available GPIO devices.
- */
-void gpio_init_all(void) {
- gpio_init(GPIOA);
- gpio_init(GPIOB);
- gpio_init(GPIOC);
- gpio_init(GPIOD);
-#ifdef STM32_HIGH_DENSITY
- gpio_init(GPIOE);
- gpio_init(GPIOF);
- gpio_init(GPIOG);
-#endif
-}
-
-/**
- * Set the mode of a GPIO pin.
- *
- * @param dev GPIO device.
- * @param pin Pin on the device whose mode to set, 0--15.
- * @param mode General purpose or alternate function mode to set the pin to.
- * @see gpio_pin_mode
- */
-void gpio_set_mode(gpio_dev *dev, uint8 pin, gpio_pin_mode mode) {
- gpio_reg_map *regs = dev->regs;
- __io uint32 *cr = &regs->CRL + (pin >> 3);
- uint32 shift = (pin & 0x7) * 4;
- uint32 tmp = *cr;
-
- tmp &= ~(0xF << shift);
- tmp |= (mode == GPIO_INPUT_PU ? GPIO_INPUT_PD : mode) << shift;
- *cr = tmp;
-
- if (mode == GPIO_INPUT_PD) {
- regs->ODR &= ~BIT(pin);
- } else if (mode == GPIO_INPUT_PU) {
- regs->ODR |= BIT(pin);
- }
-}
-
-/*
- * AFIO
- */
-
-/**
- * @brief Initialize the AFIO clock, and reset the AFIO registers.
- */
-void afio_init(void) {
- rcc_clk_enable(RCC_AFIO);
- rcc_reset_dev(RCC_AFIO);
-}
-
-#define AFIO_EXTI_SEL_MASK 0xF
-
-/**
- * @brief Select a source input for an external interrupt.
- *
- * @param exti External interrupt.
- * @param gpio_port Port which contains pin to use as source input.
- * @see afio_exti_num
- * @see afio_exti_port
- */
-void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port) {
- __io uint32 *exti_cr = &AFIO_BASE->EXTICR1 + exti / 4;
- uint32 shift = 4 * (exti % 4);
- uint32 cr = *exti_cr;
-
- cr &= ~(AFIO_EXTI_SEL_MASK << shift);
- cr |= gpio_port << shift;
- *exti_cr = cr;
-}
-
-/**
- * @brief Perform an alternate function remap.
- * @param remapping Remapping to perform.
- */
-void afio_remap(afio_remap_peripheral remapping) {
- if (remapping & AFIO_REMAP_USE_MAPR2) {
- remapping &= ~AFIO_REMAP_USE_MAPR2;
- AFIO_BASE->MAPR2 |= remapping;
- } else {
- AFIO_BASE->MAPR |= remapping;
- }
-}