diff options
Diffstat (limited to 'os/hal/platforms/STM32L1xx/pal_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32L1xx/pal_lld.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32L1xx/pal_lld.c b/os/hal/platforms/STM32L1xx/pal_lld.c new file mode 100644 index 000000000..ee32d5dbc --- /dev/null +++ b/os/hal/platforms/STM32L1xx/pal_lld.c @@ -0,0 +1,193 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT 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.
+
+ ChibiOS/RT 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/>.
+*/
+
+/**
+ * @file STM32/pal_lld.c
+ * @brief STM32 GPIO low level driver code.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_PAL || defined(__DOXYGEN__)
+
+#if STM32_HAS_GPIOG
+#define APB2_EN_MASK (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | \
+ RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN | \
+ RCC_APB2ENR_IOPEEN | RCC_APB2ENR_IOPFEN | \
+ RCC_APB2ENR_IOPGEN | RCC_APB2ENR_AFIOEN)
+#elif STM32_HAS_GPIOE
+#define APB2_EN_MASK (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | \
+ RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN | \
+ RCC_APB2ENR_IOPEEN | RCC_APB2ENR_AFIOEN)
+#else
+#define APB2_EN_MASK (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | \
+ RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN | \
+ RCC_APB2ENR_AFIOEN)
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+static void initgpio(GPIO_TypeDef *gpiop, const stm32_gpio_setup_t *config) {
+
+ gpiop->MODER = config->moder;
+ gpiop->OTYPER = config->otyper;
+ gpiop->OSPEEDR = config->ospeedr;
+ gpiop->PUPDR = config->pupdr;
+ gpiop->ODR = config->odr;
+ gpiop->AFRL = 0;
+ gpiop->AFRH = 0;
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief STM32 I/O ports configuration.
+ * @details Ports A-D(E, F, G) clocks enabled, AFIO clock enabled.
+ *
+ * @param[in] config the STM32 ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config) {
+
+ /*
+ * Enables the GPIO related clocks.
+ */
+ RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN |
+ RCC_AHBENR_GPIOCEN | RCC_AHBENR_GPIODEN |
+ RCC_AHBENR_GPIOEEN | RCC_AHBENR_GPIOHEN;
+ RCC->AHBLPENR |= RCC_AHBLPENR_GPIOALPEN | RCC_AHBLPENR_GPIOBLPEN |
+ RCC_AHBLPENR_GPIOCLPEN | RCC_AHBLPENR_GPIODLPEN |
+ RCC_AHBLPENR_GPIOELPEN | RCC_AHBLPENR_GPIOHLPEN;
+
+ /*
+ * Initial GPIO setup.
+ */
+ initgpio(GPIOA, &config->PAData);
+ initgpio(GPIOB, &config->PBData);
+ initgpio(GPIOC, &config->PCData);
+ initgpio(GPIOD, &config->PDData);
+#if STM32_HAS_GPIOE
+ initgpio(GPIOE, &config->PEData);
+#endif
+#if STM32_HAS_GPIOF
+ initgpio(GPIOF, &config->PFData);
+#endif
+#if STM32_HAS_GPIOG
+ initgpio(GPIOG, &config->PGData);
+#endif
+#if STM32_HAS_GPIOH
+ initgpio(GPIOH, &config->PHData);
+#endif
+}
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ * @note This function is not meant to be invoked directly by the
+ * application code.
+ * @note @p PAL_MODE_UNCONNECTED is implemented as push pull output at 2MHz.
+ * @note Writing on pads programmed as pull-up or pull-down has the side
+ * effect to modify the resistor setting because the output latched
+ * data is used for the resistor selection.
+ *
+ * @param[in] port the port identifier
+ * @param[in] mask the group mask
+ * @param[in] mode the mode
+ *
+ * @notapi
+ */
+void _pal_lld_setgroupmode(ioportid_t port,
+ ioportmask_t mask,
+ uint_fast8_t mode) {
+#if 0
+ static const uint8_t cfgtab[] = {
+ 4, /* PAL_MODE_RESET, implemented as input.*/
+ 2, /* PAL_MODE_UNCONNECTED, implemented as push pull output 2MHz.*/
+ 4, /* PAL_MODE_INPUT */
+ 8, /* PAL_MODE_INPUT_PULLUP */
+ 8, /* PAL_MODE_INPUT_PULLDOWN */
+ 0, /* PAL_MODE_INPUT_ANALOG */
+ 3, /* PAL_MODE_OUTPUT_PUSHPULL, 50MHz.*/
+ 7, /* PAL_MODE_OUTPUT_OPENDRAIN, 50MHz.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 8, /* Reserved.*/
+ 0xB, /* PAL_MODE_STM32_ALTERNATE_PUSHPULL, 50MHz.*/
+ 0xF, /* PAL_MODE_STM32_ALTERNATE_OPENDRAIN, 50MHz.*/
+ };
+ uint32_t mh, ml, crh, crl, cfg;
+ unsigned i;
+
+ if (mode == PAL_MODE_INPUT_PULLUP)
+ port->BSRR = mask;
+ else if (mode == PAL_MODE_INPUT_PULLDOWN)
+ port->BRR = mask;
+ cfg = cfgtab[mode];
+ mh = ml = crh = crl = 0;
+ for (i = 0; i < 8; i++) {
+ ml <<= 4;
+ mh <<= 4;
+ crl <<= 4;
+ crh <<= 4;
+ if ((mask & 0x0080) == 0)
+ ml |= 0xf;
+ else
+ crl |= cfg;
+ if ((mask & 0x8000) == 0)
+ mh |= 0xf;
+ else
+ crh |= cfg;
+ mask <<= 1;
+ }
+ port->CRH = (port->CRH & mh) | crh;
+ port->CRL = (port->CRL & ml) | crl;
+#endif
+}
+
+#endif /* HAL_USE_PAL */
+
+/** @} */
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