![](/media/cache/profiles/8dc5983b8c4ef1d8fcd5f325f9a65511.50x50_q85.jpg)
Example of UART-DMA transfers taken form the npx cmsis driver libary
Diff: lpc17xx_pinsel.c
- Revision:
- 0:7480abd3b63b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lpc17xx_pinsel.c Thu Sep 30 20:13:24 2010 +0000 @@ -0,0 +1,306 @@ +/***********************************************************************//** + * @file lpc17xx_pinsel.c + * @brief Contains all functions support for Pin connect block firmware + * library on LPC17xx + * @version 2.0 + * @date 21. May. 2010 + * @author NXP MCU SW Application Team + ************************************************************************** + * Software that is described herein is for illustrative purposes only + * which provides customers with programming information regarding the + * products. This software is supplied "AS IS" without any warranties. + * NXP Semiconductors assumes no responsibility or liability for the + * use of the software, conveys no license or title under any patent, + * copyright, or mask work right to the product. NXP Semiconductors + * reserves the right to make changes in the software without + * notification. NXP Semiconductors also make no representation or + * warranty that such application will be suitable for the specified + * use without further testing or modification. + **********************************************************************/ + +/* Peripheral group ----------------------------------------------------------- */ +/** @addtogroup PINSEL + * @{ + */ + +/* Includes ------------------------------------------------------------------- */ +#include "lpc17xx_pinsel.h" + +/* Public Functions ----------------------------------------------------------- */ + +static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum); +static void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum); +static void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum); + +/*********************************************************************//** + * @brief Setup the pin selection function + * @param[in] portnum PORT number, + * should be one of the following: + * - PINSEL_PORT_0 : Port 0 + * - PINSEL_PORT_1 : Port 1 + * - PINSEL_PORT_2 : Port 2 + * - PINSEL_PORT_3 : Port 3 + * + * @param[in] pinnum Pin number, + * should be one of the following: + - PINSEL_PIN_0 : Pin 0 + - PINSEL_PIN_1 : Pin 1 + - PINSEL_PIN_2 : Pin 2 + - PINSEL_PIN_3 : Pin 3 + - PINSEL_PIN_4 : Pin 4 + - PINSEL_PIN_5 : Pin 5 + - PINSEL_PIN_6 : Pin 6 + - PINSEL_PIN_7 : Pin 7 + - PINSEL_PIN_8 : Pin 8 + - PINSEL_PIN_9 : Pin 9 + - PINSEL_PIN_10 : Pin 10 + - PINSEL_PIN_11 : Pin 11 + - PINSEL_PIN_12 : Pin 12 + - PINSEL_PIN_13 : Pin 13 + - PINSEL_PIN_14 : Pin 14 + - PINSEL_PIN_15 : Pin 15 + - PINSEL_PIN_16 : Pin 16 + - PINSEL_PIN_17 : Pin 17 + - PINSEL_PIN_18 : Pin 18 + - PINSEL_PIN_19 : Pin 19 + - PINSEL_PIN_20 : Pin 20 + - PINSEL_PIN_21 : Pin 21 + - PINSEL_PIN_22 : Pin 22 + - PINSEL_PIN_23 : Pin 23 + - PINSEL_PIN_24 : Pin 24 + - PINSEL_PIN_25 : Pin 25 + - PINSEL_PIN_26 : Pin 26 + - PINSEL_PIN_27 : Pin 27 + - PINSEL_PIN_28 : Pin 28 + - PINSEL_PIN_29 : Pin 29 + - PINSEL_PIN_30 : Pin 30 + - PINSEL_PIN_31 : Pin 31 + + * @param[in] funcnum Function number, + * should be one of the following: + * - PINSEL_FUNC_0 : default function + * - PINSEL_FUNC_1 : first alternate function + * - PINSEL_FUNC_2 : second alternate function + * - PINSEL_FUNC_3 : third alternate function + * + * @return None + **********************************************************************/ +static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum) +{ + uint32_t pinnum_t = pinnum; + uint32_t pinselreg_idx = 2 * portnum; + uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINSEL0; + + if (pinnum_t >= 16) { + pinnum_t -= 16; + pinselreg_idx++; + } + *(uint32_t *)(pPinCon + pinselreg_idx) &= ~(0x03UL << (pinnum_t * 2)); + *(uint32_t *)(pPinCon + pinselreg_idx) |= ((uint32_t)funcnum) << (pinnum_t * 2); +} + +/*********************************************************************//** + * @brief Setup resistor mode for each pin + * @param[in] portnum PORT number, + * should be one of the following: + * - PINSEL_PORT_0 : Port 0 + * - PINSEL_PORT_1 : Port 1 + * - PINSEL_PORT_2 : Port 2 + * - PINSEL_PORT_3 : Port 3 + * @param[in] pinnum Pin number, + * should be one of the following: + - PINSEL_PIN_0 : Pin 0 + - PINSEL_PIN_1 : Pin 1 + - PINSEL_PIN_2 : Pin 2 + - PINSEL_PIN_3 : Pin 3 + - PINSEL_PIN_4 : Pin 4 + - PINSEL_PIN_5 : Pin 5 + - PINSEL_PIN_6 : Pin 6 + - PINSEL_PIN_7 : Pin 7 + - PINSEL_PIN_8 : Pin 8 + - PINSEL_PIN_9 : Pin 9 + - PINSEL_PIN_10 : Pin 10 + - PINSEL_PIN_11 : Pin 11 + - PINSEL_PIN_12 : Pin 12 + - PINSEL_PIN_13 : Pin 13 + - PINSEL_PIN_14 : Pin 14 + - PINSEL_PIN_15 : Pin 15 + - PINSEL_PIN_16 : Pin 16 + - PINSEL_PIN_17 : Pin 17 + - PINSEL_PIN_18 : Pin 18 + - PINSEL_PIN_19 : Pin 19 + - PINSEL_PIN_20 : Pin 20 + - PINSEL_PIN_21 : Pin 21 + - PINSEL_PIN_22 : Pin 22 + - PINSEL_PIN_23 : Pin 23 + - PINSEL_PIN_24 : Pin 24 + - PINSEL_PIN_25 : Pin 25 + - PINSEL_PIN_26 : Pin 26 + - PINSEL_PIN_27 : Pin 27 + - PINSEL_PIN_28 : Pin 28 + - PINSEL_PIN_29 : Pin 29 + - PINSEL_PIN_30 : Pin 30 + - PINSEL_PIN_31 : Pin 31 + + * @param[in] modenum: Mode number, + * should be one of the following: + - PINSEL_PINMODE_PULLUP : Internal pull-up resistor + - PINSEL_PINMODE_TRISTATE : Tri-state + - PINSEL_PINMODE_PULLDOWN : Internal pull-down resistor + + * @return None + **********************************************************************/ +void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum) +{ + uint32_t pinnum_t = pinnum; + uint32_t pinmodereg_idx = 2 * portnum; + uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE0; + + if (pinnum_t >= 16) { + pinnum_t -= 16; + pinmodereg_idx++ ; + } + + *(uint32_t *)(pPinCon + pinmodereg_idx) &= ~(0x03UL << (pinnum_t * 2)); + *(uint32_t *)(pPinCon + pinmodereg_idx) |= ((uint32_t)modenum) << (pinnum_t * 2); +} + +/*********************************************************************//** + * @brief Setup Open drain mode for each pin + * @param[in] portnum PORT number, + * should be one of the following: + * - PINSEL_PORT_0 : Port 0 + * - PINSEL_PORT_1 : Port 1 + * - PINSEL_PORT_2 : Port 2 + * - PINSEL_PORT_3 : Port 3 + * + * @param[in] pinnum Pin number, + * should be one of the following: + - PINSEL_PIN_0 : Pin 0 + - PINSEL_PIN_1 : Pin 1 + - PINSEL_PIN_2 : Pin 2 + - PINSEL_PIN_3 : Pin 3 + - PINSEL_PIN_4 : Pin 4 + - PINSEL_PIN_5 : Pin 5 + - PINSEL_PIN_6 : Pin 6 + - PINSEL_PIN_7 : Pin 7 + - PINSEL_PIN_8 : Pin 8 + - PINSEL_PIN_9 : Pin 9 + - PINSEL_PIN_10 : Pin 10 + - PINSEL_PIN_11 : Pin 11 + - PINSEL_PIN_12 : Pin 12 + - PINSEL_PIN_13 : Pin 13 + - PINSEL_PIN_14 : Pin 14 + - PINSEL_PIN_15 : Pin 15 + - PINSEL_PIN_16 : Pin 16 + - PINSEL_PIN_17 : Pin 17 + - PINSEL_PIN_18 : Pin 18 + - PINSEL_PIN_19 : Pin 19 + - PINSEL_PIN_20 : Pin 20 + - PINSEL_PIN_21 : Pin 21 + - PINSEL_PIN_22 : Pin 22 + - PINSEL_PIN_23 : Pin 23 + - PINSEL_PIN_24 : Pin 24 + - PINSEL_PIN_25 : Pin 25 + - PINSEL_PIN_26 : Pin 26 + - PINSEL_PIN_27 : Pin 27 + - PINSEL_PIN_28 : Pin 28 + - PINSEL_PIN_29 : Pin 29 + - PINSEL_PIN_30 : Pin 30 + - PINSEL_PIN_31 : Pin 31 + + * @param[in] modenum Open drain mode number, + * should be one of the following: + * - PINSEL_PINMODE_NORMAL : Pin is in the normal (not open drain) mode + * - PINSEL_PINMODE_OPENDRAIN : Pin is in the open drain mode + * + * @return None + **********************************************************************/ +void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum) +{ + uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE_OD0; + + if (modenum == PINSEL_PINMODE_OPENDRAIN){ + *(uint32_t *)(pPinCon + portnum) |= (0x01UL << pinnum); + } else { + *(uint32_t *)(pPinCon + portnum) &= ~(0x01UL << pinnum); + } +} + +/* End of Public Functions ---------------------------------------------------- */ + +/* Public Functions ----------------------------------------------------------- */ +/** @addtogroup PINSEL_Public_Functions + * @{ + */ +/*********************************************************************//** + * @brief Configure trace function + * @param[in] NewState State of the Trace function configuration, + * should be one of the following: + * - ENABLE : Enable Trace Function + * - DISABLE : Disable Trace Function + * + * @return None + **********************************************************************/ +void PINSEL_ConfigTraceFunc(FunctionalState NewState) +{ + if (NewState == ENABLE) { + LPC_PINCON->PINSEL10 |= (0x01UL << 3); + } else if (NewState == DISABLE) { + LPC_PINCON->PINSEL10 &= ~(0x01UL << 3); + } +} + +/*********************************************************************//** + * @brief Setup I2C0 pins + * @param[in] i2cPinMode I2C pin mode, + * should be one of the following: + * - PINSEL_I2C_Normal_Mode : The standard drive mode + * - PINSEL_I2C_Fast_Mode : Fast Mode Plus drive mode + * + * @param[in] filterSlewRateEnable should be: + * - ENABLE: Enable filter and slew rate. + * - DISABLE: Disable filter and slew rate. + * + * @return None + **********************************************************************/ +void PINSEL_SetI2C0Pins(uint8_t i2cPinMode, FunctionalState filterSlewRateEnable) +{ + uint32_t regVal = 0; + + if (i2cPinMode == PINSEL_I2C_Fast_Mode){ + regVal = PINSEL_I2CPADCFG_SCLDRV0 | PINSEL_I2CPADCFG_SDADRV0; + } + + if (filterSlewRateEnable == DISABLE){ + regVal = PINSEL_I2CPADCFG_SCLI2C0 | PINSEL_I2CPADCFG_SDAI2C0; + } + LPC_PINCON->I2CPADCFG = regVal; +} + + +/*********************************************************************//** + * @brief Configure Pin corresponding to specified parameters passed + * in the PinCfg + * @param[in] PinCfg Pointer to a PINSEL_CFG_Type structure + * that contains the configuration information for the + * specified pin. + * @return None + **********************************************************************/ +void PINSEL_ConfigPin(PINSEL_CFG_Type *PinCfg) +{ + set_PinFunc(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Funcnum); + set_ResistorMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Pinmode); + set_OpenDrainMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->OpenDrain); +} + + +/** + * @} + */ + +/** + * @} + */ + +/* --------------------------------- End Of File ------------------------------ */