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author | Fabio Utzig <utzig@utzig.org> | 2015-05-13 22:19:05 -0300 |
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committer | Fabio Utzig <utzig@utzig.org> | 2015-05-13 22:19:05 -0300 |
commit | c37554ca20e450bffa0fc3201ceda5283795e3db (patch) | |
tree | b492e115ac87c3b15b5011ce553ddd40dea2d54a /os/hal/ports/NRF51/NRF51822 | |
parent | 006b6a93d0a363d05bced66c135278e71fb311dd (diff) | |
download | ChibiOS-Contrib-c37554ca20e450bffa0fc3201ceda5283795e3db.tar.gz ChibiOS-Contrib-c37554ca20e450bffa0fc3201ceda5283795e3db.tar.bz2 ChibiOS-Contrib-c37554ca20e450bffa0fc3201ceda5283795e3db.zip |
Add initial serial driver
Diffstat (limited to 'os/hal/ports/NRF51/NRF51822')
-rw-r--r-- | os/hal/ports/NRF51/NRF51822/platform.mk | 1 | ||||
-rw-r--r-- | os/hal/ports/NRF51/NRF51822/serial_lld.c | 207 | ||||
-rw-r--r-- | os/hal/ports/NRF51/NRF51822/serial_lld.h | 119 |
3 files changed, 327 insertions, 0 deletions
diff --git a/os/hal/ports/NRF51/NRF51822/platform.mk b/os/hal/ports/NRF51/NRF51822/platform.mk index 4ed0722..c905684 100644 --- a/os/hal/ports/NRF51/NRF51822/platform.mk +++ b/os/hal/ports/NRF51/NRF51822/platform.mk @@ -1,6 +1,7 @@ # List of all the NRF51x platform files. PLATFORMSRC = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \ ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/hal_lld.c \ + ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/serial_lld.c \ ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/st_lld.c # Required include directories diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.c b/os/hal/ports/NRF51/NRF51822/serial_lld.c new file mode 100644 index 0000000..c98405d --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/serial_lld.c @@ -0,0 +1,207 @@ +/*
+ Copyright (C) 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 serial_lld.c
+ * @brief NRF51822 serial subsystem low level driver source.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#include "hal.h"
+
+#if (HAL_USE_SERIAL == TRUE) || defined(__DOXYGEN__)
+
+#include "nrf51.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief USART1 serial driver identifier.*/
+#if (NRF51_SERIAL_USE_UART0 == TRUE) || defined(__DOXYGEN__)
+SerialDriver SD1;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver default configuration.
+ */
+static const SerialConfig default_config = {
+ 38400
+};
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver output notification.
+ */
+#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__)
+static void notify1(io_queue_t *qp)
+{
+ (void)qp;
+
+ //if (NRF_UART0->EVENTS_TXDRDY) {
+ msg_t b = oqGetI(&SD1.oqueue);
+ if (b < Q_OK) {
+ chnAddFlagsI(&SD1, CHN_OUTPUT_EMPTY);
+ return;
+ }
+ NRF_UART0->TXD = b;
+ //NRF_UART0->INTENCLR = 0x80; // clear TX interrupt
+ //}
+}
+#endif
+
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__)
+OSAL_IRQ_HANDLER(Vector48) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ if (NRF_UART0->EVENTS_RXDRDY) {
+ osalSysLockFromISR();
+ if (iqIsEmptyI(&SD1.iqueue))
+ chnAddFlagsI(&SD1, CHN_INPUT_AVAILABLE);
+ if (iqPutI(&SD1.iqueue, NRF_UART0->RXD) < Q_OK)
+ chnAddFlagsI(&SD1, SD_OVERRUN_ERROR);
+ //NRF_UART0->INTENCLR = 4;
+ osalSysUnlockFromISR();
+ }
+
+ if (NRF_UART0->EVENTS_TXDRDY) {
+ msg_t b;
+
+ osalSysLockFromISR();
+ b = oqGetI(&SD1.oqueue);
+ osalSysUnlockFromISR();
+
+ if (b < Q_OK) {
+ osalSysLockFromISR();
+ chnAddFlagsI(&SD1, CHN_OUTPUT_EMPTY);
+ osalSysUnlockFromISR();
+ NRF_UART0->INTENCLR = 0x80; // clear TX interrupt
+ } else {
+ NRF_UART0->TXD = b;
+ }
+ }
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level serial driver initialization.
+ *
+ * @notapi
+ */
+void sd_lld_init(void) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ sdObjectInit(&SD1, NULL, notify1);
+#endif
+}
+
+/**
+ * @brief Low level serial driver configuration and (re)start.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ * @param[in] config the architecture-dependent serial driver configuration.
+ * If this parameter is set to @p NULL then a default
+ * configuration is used.
+ *
+ * @notapi
+ */
+void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
+
+ if (config == NULL) {
+ config = &default_config;
+ }
+
+ if (sdp->state == SD_STOP) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ if (sdp == &SD1) {
+ /* FIXME: some board specific, some hardcodeds! */
+
+ /* Configure PINs */
+ NRF_UART0->PSELRTS = ~0;
+ NRF_UART0->PSELCTS = ~0;
+
+ NRF_GPIO->PIN_CNF[9] = 1;
+ NRF_UART0->PSELTXD = 9;
+ NRF_UART0->PSELRXD = 11;
+
+ /* 38400!!! */
+ NRF_UART0->BAUDRATE = 0x009D5000;
+
+ /* Enable interrupts for RX, TX and ERROR */
+ NRF_UART0->INTENSET = 0x284;
+
+ nvicEnableVector(UART0_IRQn, 12);
+
+ NRF_UART0->ENABLE = 4;
+ NRF_UART0->TASKS_STARTRX = 1;
+ NRF_UART0->TASKS_STARTTX = 1;
+ }
+#endif
+
+ }
+}
+
+/**
+ * @brief Low level serial driver stop.
+ * @details De-initializes the USART, stops the associated clock, resets the
+ * interrupt vector.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ *
+ * @notapi
+ */
+void sd_lld_stop(SerialDriver *sdp) {
+
+ if (sdp->state == SD_READY) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ if (&SD1 == sdp) {
+ nvicDisableVector(UART0_IRQn);
+ }
+#endif
+
+ }
+}
+
+#endif /* HAL_USE_SERIAL == TRUE */
+
+/** @} */
diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.h b/os/hal/ports/NRF51/NRF51822/serial_lld.h new file mode 100644 index 0000000..ae8e46e --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/serial_lld.h @@ -0,0 +1,119 @@ +/*
+ Copyright (C) 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 serial_lld.h
+ * @brief NRF51822 serial subsystem low level driver header.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#ifndef _SERIAL_LLD_H_
+#define _SERIAL_LLD_H_
+
+#if (HAL_USE_SERIAL == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name PLATFORM configuration options
+ * @{
+ */
+/**
+ * @brief USART1 driver enable switch.
+ * @details If set to @p TRUE the support for USART1 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(NRF51_SERIAL_USE_UART0) || defined(__DOXYGEN__)
+#define NRF51_SERIAL_USE_UART0 FALSE
+#endif
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief NRF51 Serial Driver configuration structure.
+ * @details An instance of this structure must be passed to @p sdStart()
+ * in order to configure and start a serial driver operations.
+ * @note This structure content is architecture dependent, each driver
+ * implementation defines its own version and the custom static
+ * initializers.
+ */
+typedef struct {
+ /**
+ * @brief Bit rate.
+ */
+ uint32_t speed;
+ /* End of the mandatory fields.*/
+} SerialConfig;
+
+/**
+ * @brief @p SerialDriver specific data.
+ */
+#define _serial_driver_data \
+ _base_asynchronous_channel_data \
+ /* Driver state.*/ \
+ sdstate_t state; \
+ /* Input queue.*/ \
+ input_queue_t iqueue; \
+ /* Output queue.*/ \
+ output_queue_t oqueue; \
+ /* Input circular buffer.*/ \
+ uint8_t ib[SERIAL_BUFFERS_SIZE]; \
+ /* Output circular buffer.*/ \
+ uint8_t ob[SERIAL_BUFFERS_SIZE]; \
+ /* End of the mandatory fields.*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if (NRF51_SERIAL_USE_UART0 == TRUE) && !defined(__DOXYGEN__)
+extern SerialDriver SD1;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void sd_lld_init(void);
+ void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
+ void sd_lld_stop(SerialDriver *sdp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_SERIAL == TRUE */
+
+#endif /* _SERIAL_LLD_H_ */
+
+/** @} */
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