diff options
Diffstat (limited to 'platform/drivers/src/lpuart_vf6xx.c')
| -rw-r--r-- | platform/drivers/src/lpuart_vf6xx.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/platform/drivers/src/lpuart_vf6xx.c b/platform/drivers/src/lpuart_vf6xx.c new file mode 100644 index 0000000..e28d198 --- /dev/null +++ b/platform/drivers/src/lpuart_vf6xx.c @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright (c) 2016, Toradex AG + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o 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. + * + * o Neither the name of Freescale Semiconductor, Inc. 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 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 HOLDER 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. + */ + +#include <lpuart_vf6xx.h> + +/******************************************************************************* + * Code + ******************************************************************************/ + +/******************************************************************************* + * Initialization and Configuration functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_Init + * Description : This function initializes the module according to uart + * initialize structure. + * + *END**************************************************************************/ +void LPUART_Init(UART_Type* base, uart_init_config_t* initConfig) +{ + assert(initConfig); + + LPUART_Disable(base); + LPUART_SetParity(base, initConfig->parity); + LPUART_SetBaudRate(base, initConfig->clockRate, initConfig->baudRate); +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetBaudRate + * Description : This function configures uart module baud rate. + * + *END**************************************************************************/ +void LPUART_SetBaudRate(UART_Type* base, uint32_t clockRate, uint32_t baudRate) +{ + uint32_t sbr, brfa; + uint8_t cr4 = 0, bdh = 0; + + sbr = clockRate / (16 * baudRate); + brfa = ((clockRate - (16 * sbr * baudRate)) * 2) / baudRate; + bdh &= ~UART_BDH_SBR_MASK; + bdh |= (sbr >> 8) & UART_BDH_SBR_MASK; + cr4 &= ~UART_C4_BRFA_MASK; + brfa &= UART_C4_BRFA_MASK; + + UART_C4_REG(base) = (cr4 | brfa); + UART_BDH_REG(base) = bdh; + UART_BDL_REG(base) = sbr; +} + +/******************************************************************************* + * Hardware Flow control and Modem Signal functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetRtsFlowCtrl + * Description : This function is used to set the enable condition of RTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetRtsFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_RTS; + else + UART_MODEM_REG(base) |= UART_FLOWCONTROL_RTS; +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetCtsFlowCtrl + * Description : This function is used to set the enable condition of CTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetCtsFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) |= UART_FLOWCONTROL_CTS; + else + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_CTS; +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetFlowCtrl + * Description : This function is used to set the enable condition of RTS, CTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) |= UART_FLOWCONTROL_MASK; + else + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_MASK; +} + +/******************************************************************************* + * EOF + ******************************************************************************/ |