eac1ca22bd
NOTE: this commit does not introduce any change, ideally even the binary should
be almost the same. I checked the disassembly by hand and there are only a few
differences here and there, mostly the compiler decides to compile very close
expressions slightly differently. I tried to run the new code on several targets
to make sure and saw no difference.
The major syntax changes of the new headers are as follows:
- BF_{WR,SET,CLR} are now superpowerful and allows to set several fileds at once:
BF_WR(reg, field1(value1), field2(value2), ...)
- BF_CS (use like BF_WR) does a write to reg_CLR and then reg_SET instead of RMW
- there is no more need for macros like BF_{WR_,SET,CLR}_V, since one can simply
BF_WR with field_V(name)
- the old BF_SETV macro has no trivial equivalent and is replaced with its
its equivalent for BF_WR(reg_SET, ...)
I also rename the register headers: "regs/regs-x.h" -> "regs/x.h" to avoid the
redundant "regs".
Final note: the registers were generated using the following command:
./headergen_v2 -g imx -o ../../firmware/target/arm/imx233/regs/ desc/regs-stmp3{600,700,780}.xml
Change-Id: I7485e8b4315a0929a8edb63e7fa1edcaa54b1edc
76 lines
No EOL
2.4 KiB
C
76 lines
No EOL
2.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2013 by Lorenzo Miori
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "uartdbg-imx233.h"
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#include "pinctrl-imx233.h"
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#include "clkctrl-imx233.h"
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#include "regs/uartdbg.h"
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void imx233_uartdbg_init(unsigned long baud)
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{
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/* Enable UART clock */
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imx233_clkctrl_enable(CLK_UART, true);
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/* Configure UART pins */
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imx233_pinctrl_setup_vpin(VPIN_UARTDBG_TX, "uartdbg tx", PINCTRL_DRIVE_4mA, false);
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imx233_pinctrl_setup_vpin(VPIN_UARTDBG_RX, "uartdbg rx", PINCTRL_DRIVE_4mA, false);
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/* Set baud rate */
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HW_UARTDBG_IBRD = baud >> 16;
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HW_UARTDBG_FBRD = baud & 0xFFFF;
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/* Set port options (actually needed to set baud rate), 8 bit char, enable FIFO buffer */
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BF_WR(UARTDBG_LCR_H, WLEN(3));
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BF_WR(UARTDBG_LCR_H, FEN(1));
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/* Finally enable UART device, TX enable, RX enable, device enable */
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BF_WR(UARTDBG_CR, TXE(1));
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BF_WR(UARTDBG_CR, RXE(1));
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BF_WR(UARTDBG_CR, UARTEN(1));
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}
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void imx233_uartdbg_send(unsigned char data)
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{
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/* Wait to transmit if TX FIFO buffer is full*/
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while (BF_RD(UARTDBG_FR, TXFF));
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BF_WR(UARTDBG_DR, DATA(data));
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}
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void uart_tx(const char* data)
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{
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while (*data != 0)
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imx233_uartdbg_send(*data++);
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}
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unsigned int uart_rx(char* rx_buf, unsigned int len)
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{
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unsigned int i = 0;
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while(i < len)
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{
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/* Check if the UART Rx Buffer has something into -> RXFE */
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if(!BF_RD(UARTDBG_FR, RXFE))
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{
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rx_buf[i] = HW_UARTDBG_DR;
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i++;
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}
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}
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return i;
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} |