nrf52dk: cpu/nrf52832 support

2016-01-09 14:44:18 +01:00 · 2016-01-09 14:44:18 +01:00 · 20f9515ed1
commit 20f9515ed1
parent 0671640ea2
20 changed files with 1918 additions and 0 deletions
--- a/cpu/nrf52832/dev/uart0.c
+++ b/cpu/nrf52832/dev/uart0.c
@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2015, Nordic Semiconductor
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+/**
+ * \addtogroup nrf52832-dev Device drivers
+ * @{
+ *
+ * \addtogroup nrf52832-uart UART driver
+ * @{
+ *
+ * \file
+ *         Contiki compatible UART driver.
+ * \author
+ *         Wojciech Bober <wojciech.bober@nordicsemi.no>
+ */
+#include <stdlib.h>
+#include "nrf.h"
+#include "nrf_drv_config.h"
+#include "nrf_drv_uart.h"
+#include "app_util_platform.h"
+#include "app_error.h"
+
+#include "contiki.h"
+#include "dev/uart0.h"
+#include "dev/watchdog.h"
+#include "lib/ringbuf.h"
+
+#define TXBUFSIZE 128
+static uint8_t rx_buffer[1];
+
+static int (*uart0_input_handler)(unsigned char c);
+
+static struct ringbuf txbuf;
+static uint8_t txbuf_data[TXBUFSIZE];
+
+/*---------------------------------------------------------------------------*/
+static void
+uart_event_handler(nrf_drv_uart_event_t * p_event, void * p_context)
+{
+  ENERGEST_ON(ENERGEST_TYPE_IRQ);
+
+  if (p_event->type == NRF_DRV_UART_EVT_RX_DONE) {
+    if (uart0_input_handler != NULL) {
+      uart0_input_handler(p_event->data.rxtx.p_data[0]);
+    }
+    (void)nrf_drv_uart_rx(rx_buffer, 1);
+  } else if (p_event->type == NRF_DRV_UART_EVT_TX_DONE) {
+    if (ringbuf_elements(&txbuf) > 0) {
+      uint8_t c = ringbuf_get(&txbuf);
+      nrf_drv_uart_tx(&c, 1);
+    }
+  }
+
+  ENERGEST_OFF(ENERGEST_TYPE_IRQ);
+}
+/*---------------------------------------------------------------------------*/
+void
+uart0_set_input(int (*input)(unsigned char c))
+{
+  uart0_input_handler = input;
+}
+/*---------------------------------------------------------------------------*/
+void
+uart0_writeb(unsigned char c)
+{
+  if (nrf_drv_uart_tx(&c, 1) == NRF_ERROR_BUSY) {
+    while (ringbuf_put(&txbuf, c) == 0) {
+      __WFE();
+    }
+  }
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * Initialize the RS232 port.
+ *
+ */
+void
+uart0_init(unsigned long ubr)
+{
+  nrf_drv_uart_config_t config = NRF_DRV_UART_DEFAULT_CONFIG;
+  ret_code_t retcode = nrf_drv_uart_init(&config, uart_event_handler);
+  APP_ERROR_CHECK(retcode);
+
+  ringbuf_init(&txbuf, txbuf_data, sizeof(txbuf_data));
+
+  nrf_drv_uart_rx_enable();
+  nrf_drv_uart_rx(rx_buffer, 1);
+}
+/**
+ * @}
+ * @}
+ */