diff --git a/firmware/SOURCES b/firmware/SOURCES index 92a7a29a19..83389482f3 100644 --- a/firmware/SOURCES +++ b/firmware/SOURCES @@ -534,6 +534,7 @@ target/arm/imx233/pwm-imx233.c target/arm/imx233/rtc-imx233.c target/arm/imx233/dcp-imx233.c target/arm/imx233/emi-imx233.c +target/arm/imx233/uartdbg-imx233.c # ifdef HAVE_TOUCHSCREEN target/arm/imx233/touchscreen-imx233.c # endif diff --git a/firmware/target/arm/imx233/uartdbg-imx233.c b/firmware/target/arm/imx233/uartdbg-imx233.c new file mode 100644 index 0000000000..077b405f49 --- /dev/null +++ b/firmware/target/arm/imx233/uartdbg-imx233.c @@ -0,0 +1,74 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2013 by Lorenzo Miori + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "uartdbg-imx233.h" +#include "pinctrl-imx233.h" +#include "clkctrl-imx233.h" + +void imx233_uartdbg_init(unsigned long baud) +{ + /* Enable UART clock */ + imx233_clkctrl_enable(CLK_UART, true); + /* Configure UART pins */ + imx233_pinctrl_setup_vpin(VPIN_UARTDBG_TX, "uartdbg tx", PINCTRL_DRIVE_4mA, false); + imx233_pinctrl_setup_vpin(VPIN_UARTDBG_RX, "uartdbg rx", PINCTRL_DRIVE_4mA, false); + + /* Set baud rate */ + HW_UARTDBG_IBRD = baud >> 16; + HW_UARTDBG_FBRD = baud & 0xFFFF; + + /* Set port options (actually needed to set baud rate), 8 bit char, enable FIFO buffer */ + BF_WR(UARTDBG_LCR_H, WLEN, 3); + BF_WR(UARTDBG_LCR_H, FEN, 1); + + /* Finally enable UART device, TX enable, RX enable, device enable */ + BF_WR(UARTDBG_CR, TXE, 1); + BF_WR(UARTDBG_CR, RXE, 1); + BF_WR(UARTDBG_CR, UARTEN, 1); +} + +void imx233_uartdbg_send(unsigned char data) +{ + /* Wait to transmit if TX FIFO buffer is full*/ + while (BF_RD(UARTDBG_FR, TXFF)); + BF_WR(UARTDBG_DR, DATA, data); +} + +void uart_tx(const char* data) +{ + while (*data != 0) + imx233_uartdbg_send(*data++); +} + +unsigned int uart_rx(char* rx_buf, unsigned int len) +{ + unsigned int i = 0; + + while(i < len) + { + /* Check if the UART Rx Buffer has something into -> RXFE */ + if(!BF_RD(UARTDBG_FR, RXFE)) + { + rx_buf[i] = HW_UARTDBG_DR; + i++; + } + } + return i; +} \ No newline at end of file diff --git a/firmware/target/arm/imx233/uartdbg-imx233.h b/firmware/target/arm/imx233/uartdbg-imx233.h new file mode 100644 index 0000000000..3ee5175a21 --- /dev/null +++ b/firmware/target/arm/imx233/uartdbg-imx233.h @@ -0,0 +1,35 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2013 by Lorenzo Miori + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "system.h" +#include "regs/regs-uartdbg.h" + +/* This values below are valid with a XCLK of 24MHz */ +#define BAUD_9600 (uint32_t)(156 << 16 | 16) +#define BAUD_19200 (uint32_t)(78 << 16 | 2) +#define BAUD_38400 (uint32_t)(39 << 16 | 4) +#define BAUD_57600 (uint32_t)(26 << 16 | 3) +#define BAUD_115200 (uint32_t)(13 << 16 | 1) + +void imx233_uartdbg_init(unsigned long baud); +void imx233_uartdbg_send(unsigned char data); + +void uart_tx(const char* data); +unsigned int uart_rx(char* rx_buf, unsigned int len); \ No newline at end of file