diff options
Diffstat (limited to 'os/hal/ports/KINETIS/LLD/GPIOv1/hal_pal_lld.c')
| -rw-r--r-- | os/hal/ports/KINETIS/LLD/GPIOv1/hal_pal_lld.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/os/hal/ports/KINETIS/LLD/GPIOv1/hal_pal_lld.c b/os/hal/ports/KINETIS/LLD/GPIOv1/hal_pal_lld.c new file mode 100644 index 0000000..3cba308 --- /dev/null +++ b/os/hal/ports/KINETIS/LLD/GPIOv1/hal_pal_lld.c @@ -0,0 +1,245 @@ +/*
+ ChibiOS - Copyright (C) 2014-2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file GPIOv1/hal_pal_lld.c
+ * @brief PAL subsystem low level driver.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#include "osal.h"
+#include "hal.h"
+
+#if HAL_USE_PAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Reads a logical state from an I/O pad.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @return The logical state.
+ * @retval PAL_LOW low logical state.
+ * @retval PAL_HIGH high logical state.
+ *
+ * @notapi
+ */
+uint8_t _pal_lld_readpad(ioportid_t port,
+ uint8_t pad) {
+
+ return (port->PDIR & ((uint32_t) 1 << pad)) ? PAL_HIGH : PAL_LOW;
+}
+
+/**
+ * @brief Writes a logical state on an output pad.
+ * @note This function is not meant to be invoked directly by the
+ * application code.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @param[in] bit logical value, the value must be @p PAL_LOW or
+ * @p PAL_HIGH
+ *
+ * @notapi
+ */
+void _pal_lld_writepad(ioportid_t port,
+ uint8_t pad,
+ uint8_t bit) {
+
+ if (bit == PAL_HIGH)
+ port->PDOR |= ((uint32_t) 1 << pad);
+ else
+ port->PDOR &= ~((uint32_t) 1 << pad);
+}
+
+/**
+ * @brief Pad mode setup.
+ * @details This function programs a pad with the specified mode.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ * @note Programming an unknown or unsupported mode is silently ignored.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @param[in] mode pad mode
+ *
+ * @notapi
+ */
+void _pal_lld_setpadmode(ioportid_t port,
+ uint8_t pad,
+ iomode_t mode) {
+
+ PORT_TypeDef *portcfg = NULL;
+
+ osalDbgAssert(pad < PADS_PER_PORT, "pal_lld_setpadmode() #1, invalid pad");
+
+ if (mode == PAL_MODE_OUTPUT_PUSHPULL)
+ port->PDDR |= ((uint32_t) 1 << pad);
+ else
+ port->PDDR &= ~((uint32_t) 1 << pad);
+
+ if (port == IOPORT1)
+ portcfg = PORTA;
+ else if (port == IOPORT2)
+ portcfg = PORTB;
+ else if (port == IOPORT3)
+ portcfg = PORTC;
+ else if (port == IOPORT4)
+ portcfg = PORTD;
+ else if (port == IOPORT5)
+ portcfg = PORTE;
+
+ osalDbgAssert(portcfg != NULL, "pal_lld_setpadmode() #2, invalid port");
+
+ switch (mode) {
+ case PAL_MODE_RESET:
+ case PAL_MODE_INPUT:
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1);
+ break;
+#if KINETIS_GPIO_HAS_OPENDRAIN
+ case PAL_MODE_OUTPUT_OPENDRAIN:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
+ PORTx_PCRn_ODE;
+ break;
+#else
+#undef PAL_MODE_OUTPUT_OPENDRAIN
+#endif
+ case PAL_MODE_INPUT_PULLUP:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
+ PORTx_PCRn_PE |
+ PORTx_PCRn_PS;
+ break;
+ case PAL_MODE_INPUT_PULLDOWN:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
+ PORTx_PCRn_PE;
+ break;
+ case PAL_MODE_UNCONNECTED:
+ case PAL_MODE_INPUT_ANALOG:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(0);
+ break;
+ case PAL_MODE_ALTERNATIVE_1:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1);
+ break;
+ case PAL_MODE_ALTERNATIVE_2:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(2);
+ break;
+ case PAL_MODE_ALTERNATIVE_3:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(3);
+ break;
+ case PAL_MODE_ALTERNATIVE_4:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(4);
+ break;
+ case PAL_MODE_ALTERNATIVE_5:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(5);
+ break;
+ case PAL_MODE_ALTERNATIVE_6:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(6);
+ break;
+ case PAL_MODE_ALTERNATIVE_7:
+ portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(7);
+ break;
+ }
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Kinetis I/O ports configuration.
+ * @details Ports A-E clocks enabled.
+ *
+ * @param[in] config the Kinetis ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config) {
+
+ int i, j;
+
+ /* Enable clocking on all Ports */
+ SIM->SCGC5 |= SIM_SCGC5_PORTA |
+ SIM_SCGC5_PORTB |
+ SIM_SCGC5_PORTC |
+ SIM_SCGC5_PORTD |
+ SIM_SCGC5_PORTE;
+
+ /* Initial PORT and GPIO setup */
+ for (i = 0; i < TOTAL_PORTS; i++) {
+ for (j = 0; j < PADS_PER_PORT; j++) {
+ pal_lld_setpadmode(config->ports[i].port,
+ j,
+ config->ports[i].pads[j]);
+ }
+ }
+}
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ *
+ * @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,
+ iomode_t mode) {
+
+ int i;
+
+ (void)mask;
+
+ for (i = 0; i < PADS_PER_PORT; i++) {
+ pal_lld_setpadmode(port, i, mode);
+ }
+}
+
+#endif /* HAL_USE_PAL */
+
+/** @} */
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