125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/**
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* Copyright (c) 2014, Analog Devices, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted (subject to the limitations in the
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* disclaimer below) provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* - Neither the name of Analog Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
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* GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
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* HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \author Jim Paris <jim.paris@rigado.com>
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*/
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#include <aducrf101-include.h>
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static int (*uart_input_handler)(unsigned char c);
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static int stdout_enabled;
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void
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uart_init(int baud)
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{
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/* P1.0 is UARTRXD, P1.1 is UARTTXD */
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pADI_GP1->GPCON &= ~(GP1CON_CON0_MSK | GP1CON_CON1_MSK);
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pADI_GP1->GPCON |= GP1CON_CON0_UART0RXD | GP1CON_CON1_UART0TXD;
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/* Set P1.1 as output */
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GP1OEN_OEN1_BBA = 1;
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/* Set baudrate */
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int div = (F_CPU / 32) / baud;
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pADI_UART->COMDIV = div;
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pADI_UART->COMFBR = 0x8800 | ((((64 * F_CPU) / div) / baud) - 2048);
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pADI_UART->COMIEN = 0;
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pADI_UART->COMLCR = 3;
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/* Set up RX IRQ */
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pADI_UART->COMIEN = COMIEN_ERBFI_EN;
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NVIC_EnableIRQ(UART_IRQn);
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__enable_irq();
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uart_input_handler = NULL;
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stdout_enabled = 1;
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}
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/*---------------------------------------------------------------------------*/
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void
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uart_put(unsigned char x)
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{
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while(!(pADI_UART->COMLSR & COMLSR_THRE))
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continue;
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pADI_UART->COMTX = x;
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}
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/*---------------------------------------------------------------------------*/
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void
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UART_Int_Handler(void)
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{
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if(pADI_UART->COMIIR & COMIIR_STA_RXBUFFULL) {
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unsigned char x = pADI_UART->COMRX;
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if(uart_input_handler) {
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uart_input_handler(x);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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uart_set_input(int (*input)(unsigned char c))
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{
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uart_input_handler = input;
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}
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void
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uart_enable_stdout(int enabled)
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{
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stdout_enabled = enabled;
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}
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/*---------------------------------------------------------------------------*/
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/* Connect newlib's _write function to the UART. */
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int
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_write(int fd, const void *buf, size_t len)
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{
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if(stdout_enabled == 0) {
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return -1;
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}
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if(fd == 1 || fd == 2) {
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int n = len;
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const unsigned char *p = buf;
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while(n--)
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uart_put(*p++);
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return len;
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}
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return -1;
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}
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/*---------------------------------------------------------------------------*/
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#ifdef __ICCARM__
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/* Connect IAR's __write function to the UART. */
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size_t
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__write(int fd, const unsigned char *buf, size_t count)
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{
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return _write(fd, buf, count);
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}
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#endif
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