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-rw-r--r--lib/stm32/gpio.c118
1 files changed, 0 insertions, 118 deletions
diff --git a/lib/stm32/gpio.c b/lib/stm32/gpio.c
deleted file mode 100644
index 52c0c66..0000000
--- a/lib/stm32/gpio.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * Basic GPIO handling API.
- *
- * Examples:
- * gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
- * GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
- * gpio_set(GPIOB, GPIO4);
- * gpio_clear(GPIOG, GPIO2 | GPIO9);
- * gpio_get(GPIOC, GPIO1);
- * gpio_toggle(GPIOA, GPIO7 | GPIO8);
- * reg16 = gpio_port_read(GPIOD);
- * gpio_port_write(GPIOF, 0xc8fe);
- *
- * TODO:
- * - GPIO remapping support
- */
-
-#include <libopencm3/stm32/gpio.h>
-
-void gpio_set_mode(u32 gpioport, u8 mode, u8 cnf, u16 gpios)
-{
- u16 i, offset = 0;
- u32 crl = 0, crh = 0, tmp32 = 0;
-
- /*
- * We want to set the config only for the pins mentioned in gpios,
- * but keeping the others, so read out the actual config first.
- */
- crl = GPIO_CRL(gpioport);
- crh = GPIO_CRH(gpioport);
-
- /* Iterate over all bits, use i as the bitnumber. */
- for (i = 0; i < 16; i++) {
- /* Only set the config if the bit is set in gpios. */
- if (!((1 << i) & gpios))
- continue;
-
- /* Calculate bit offset. */
- offset = (i < 8) ? (i * 4) : ((i - 8) * 4);
-
- /* Use tmp32 to either modify crl or crh. */
- tmp32 = (i < 8) ? crl : crh;
-
- /* Modify bits are needed. */
- tmp32 &= ~(0b1111 << offset); /* Clear the bits first. */
- tmp32 |= (mode << offset) | (cnf << (offset + 2));
-
- /* Write tmp32 into crl or crh, leave the other unchanged. */
- crl = (i < 8) ? tmp32 : crl;
- crh = (i >= 8) ? tmp32 : crh;
- }
-
- GPIO_CRL(gpioport) = crl;
- GPIO_CRH(gpioport) = crh;
-}
-
-void gpio_set(u32 gpioport, u16 gpios)
-{
- GPIO_BSRR(gpioport) = gpios;
-}
-
-void gpio_clear(u32 gpioport, u16 gpios)
-{
- GPIO_BRR(gpioport) = gpios;
-}
-
-u16 gpio_get(u32 gpioport, u16 gpios)
-{
- return gpio_port_read(gpioport) & gpios;
-}
-
-void gpio_toggle(u32 gpioport, u16 gpios)
-{
- GPIO_ODR(gpioport) = GPIO_IDR(gpioport) ^ gpios;
-}
-
-u16 gpio_port_read(u32 gpioport)
-{
- return (u16)GPIO_IDR(gpioport);
-}
-
-void gpio_port_write(u32 gpioport, u16 data)
-{
- GPIO_ODR(gpioport) = data;
-}
-
-void gpio_port_config_lock(u32 gpioport, u16 gpios)
-{
- u32 reg32;
-
- /* Special "Lock Key Writing Sequence", see datasheet. */
- GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
- GPIO_LCKR(gpioport) = ~GPIO_LCKK & gpios; /* Clear LCKK. */
- GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
- reg32 = GPIO_LCKR(gpioport); /* Read LCKK. */
- reg32 = GPIO_LCKR(gpioport); /* Read LCKK again. */
-
- /* If (reg32 & GPIO_LCKK) is true, the lock is now active. */
-}