Diff: source/hic_hal/nxp/lpc4322/lpc43xx_scu.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/nxp/lpc4322/lpc43xx_scu.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,87 @@
+/**
+ * @file    lpc43xx_scu.c
+ * @brief   
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Includes ------------------------------------------------------------------- */
+#include "LPC43xx.h"                      /* lpc43xx definitions                */
+#include "lpc_types.h"
+#include "lpc43xx_scu.h"
+
+/* Pin modes
+*  =========
+*  The EPUN and EPD bits in the SFS registers allow the selection of weak on-chip
+*  pull-up or pull-down resistors with a typical value of 50 kOhm for each pin or the
+*  selection of the repeater mode.
+*  The possible on-chip resistor configurations are pull-up enabled, pull-down enabled, or no
+*  pull-up/pull-down. The default value is pull-up enabled.
+*
+*  The repeater mode enables the pull-up resistor if the pin is at a logic HIGH and enables
+*  the pull-down resistor if the pin is at a logic LOW. This causes the pin to retain its last
+*  known state if it is configured as an input and is not driven externally. Repeater mode may
+*  typically be used to prevent a pin from floating (and potentially using significant power if it
+*  floats to an indeterminate state) if it is temporarily not driven.
+*  Repeater mode is enabled when both pull-up and pull-down are enabled.
+*
+*  To be able to receive a digital signal, the input buffer must be enabled through bit EZI in
+*  the pin configuration registers. By default, the input buffer is disabled.
+*  For pads that support both a digital and an analog function, the input buffer must be
+*  disabled before enabling the analog function.
+*
+*  All digital pins support a programmable glitch filter (bit ZIF), which can be switched on or
+*  off. By default, the glitch filter is on. The glitch filter should be disabled for
+*  clocking signals with frequencies higher than 30 MHz.
+*
+*  Normal-drive and high-speed pins support a programmable slew rate (bit EHS) to select
+*  between lower noise and low speed or higher noise and high speed . The typical
+*  frequencies supported are 50 MHz/80 MHz for normal-drive pins and 75 MHz/180 MHz for
+*  high-speed pins.
+*/
+
+/*********************************************************************//**
+ * @brief 		Configure pin function
+ * @param[in]	port	Port number, should be: 0..15
+ * @param[in]	pin	Pin number, should be: 0..31
+ * @param[in]	mode	Pin mode, should be:
+ * 					- MD_PUP	:Pull-up enabled
+ * 					- MD_BUK	:Plain input
+ * 					- MD_PLN	:Repeater mode
+ * 					- MD_PDN	:Pull-down enabled
+ * 					- MD_EHS        :Slew rate
+ * 					- MD_EZI        :Input buffer enable
+ * 					- MD_ZI         :Glitch filter enabled
+ * 					- MD_EHD0       :High drive  8 mA
+ * 					- MD_EHD1       :High drive 14 mA
+ * 					- MD_EHD2       :High drive 20 mA
+ * @param[in]	func 	Function mode, should be:
+ * 					- FUNC0		:Function 0
+ * 					- FUNC1		:Function 1
+ * 					- FUNC2		:Function 2
+ * 					- FUNC3		:Function 3
+ * 					- FUNC4		:Function 4
+ * 					- FUNC5		:Function 5
+ * 					- FUNC6		:Function 6
+ * 					- FUNC7		:Function 7
+ * @return		None
+ **********************************************************************/
+void scu_pinmux(uint8_t port, uint8_t pin, uint8_t mode, uint8_t func)
+{
+    uint32_t *scu_base = (uint32_t *)(LPC_SCU_BASE);
+    scu_base[(PORT_OFFSET * port + PIN_OFFSET * pin) / 4] = mode + func;
+} /* scu_pinmux */