Add initial ADuCRF101 CPU support

2014-06-21 22:35:42 -04:00 · 2014-06-21 22:35:42 -04:00 · baa6058839
commit baa6058839
parent 2be02cd269
12 changed files with 1003 additions and 0 deletions
--- a/cpu/arm/aducrf101/dev/uart.c
+++ b/cpu/arm/aducrf101/dev/uart.c
@ -0,0 +1,116 @@
+/**
+ * Copyright (c) 2014, Analog Devices, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted (subject to the limitations in the
+ * disclaimer below) provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of Analog Devices, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
+ * GRANTED BY THIS LICENSE.  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
+ * HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+/**
+ * \author Jim Paris <jim.paris@rigado.com>
+ */
+
+#include <unistd.h>
+#include <aducrf101-include.h>
+
+static int (*uart_input_handler)(unsigned char c);
+static int stdout_enabled;
+
+void
+uart_init(int baud)
+{
+  /* P1.0 is UARTRXD, P1.1 is UARTTXD */
+  pADI_GP1->GPCON &= ~(GP1CON_CON0_MSK | GP1CON_CON1_MSK);
+  pADI_GP1->GPCON |= GP1CON_CON0_UART0RXD | GP1CON_CON1_UART0TXD;
+
+  /* Set P1.1 as output */
+  GP1OEN_OEN1_BBA = 1;
+
+  /* Set baudrate */
+  int div = (F_CPU / 32) / baud;
+  pADI_UART->COMDIV = div;
+  pADI_UART->COMFBR = 0x8800 | ((((64 * F_CPU) / div) / baud) - 2048);
+  pADI_UART->COMIEN = 0;
+  pADI_UART->COMLCR = 3;
+
+  /* Set up RX IRQ */
+  pADI_UART->COMIEN = COMIEN_ERBFI_EN;
+  NVIC_EnableIRQ(UART_IRQn);
+  __enable_irq();
+
+  uart_input_handler = NULL;
+  stdout_enabled = 1;
+}
+/*---------------------------------------------------------------------------*/
+void
+uart_put(unsigned char x)
+{
+  while(!(pADI_UART->COMLSR & COMLSR_THRE))
+    continue;
+  pADI_UART->COMTX = x;
+}
+/*---------------------------------------------------------------------------*/
+void
+UART_Int_Handler(void)
+{
+  if(pADI_UART->COMIIR & COMIIR_STA_RXBUFFULL) {
+    unsigned char x = pADI_UART->COMRX;
+    if(uart_input_handler) {
+      uart_input_handler(x);
+    }
+  }
+}
+/*---------------------------------------------------------------------------*/
+void
+uart_set_input(int (*input)(unsigned char c))
+{
+  uart_input_handler = input;
+}
+void
+uart_enable_stdout(int enabled)
+{
+  stdout_enabled = enabled;
+}
+/*---------------------------------------------------------------------------*/
+/* Connect newlib's _write function to the UART. */
+int
+_write(int fd, const void *buf, size_t len)
+{
+  if(stdout_enabled == 0) {
+    return -1;
+  }
+
+  if(fd == STDOUT_FILENO || fd == STDERR_FILENO) {
+    int n = len;
+    const unsigned char *p = buf;
+    while(n--)
+      uart_put(*p++);
+    return len;
+  }
+  return -1;
+}