315 lines
12 KiB
C
315 lines
12 KiB
C
/****************************************************************************
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* configs/lpcxpresso-lpc54628/include/board.h
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef _CONFIGS_LPCXPRESSO_LPC54628_INCLUDE_BOARD_H
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#define _CONFIGS_LPCXPRESSO_LPC54628_INCLUDE_BOARD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Clocking ****************************************************************/
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#undef BOARD_180MHz
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#define BOARD_220MHz 1
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/* System PLL
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*
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* Notation:
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* Fin = the input to the PLL.
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* Fout = the output of the PLL.
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* Fref = the PLL reference frequency, the input to the phase frequency
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* detector.
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* N = optional pre-divider value.
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* M = feedback divider value, which represents the multiplier for the
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* PLL.
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* P = optional post-divider value. An additional divide-by-2 is
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* included in the post-divider path.
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*
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* In all variations of normal mode, the following requirements must be met:
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*
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* -275 MHz ≤ Fcco ≤ 550 MHz.
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* 4 kHz ≤ Fin / N ≤ 25 MHz.
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*
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* Normal mode with optional pre-divide. In the equations, use N = 1 when
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* the pre-divider is not used. The extra divide by 2 is in the feedback
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* divider path:
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*
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* Fout = Fcco = 2 x M x Fin / N
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*
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* Normal mode with post-divide and optional pre-divide. In the equations,
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* use N = 1 when the pre-divider is not used:
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*
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* Fout = Fcco / (2 x P) = M x Fin / (N x P)
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*/
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#define BOARD_PLL_SOURCE /* Select source FR0 12MHz */
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#define BOARD_PLL_FIN LPC54_FRO_12MHZ /* PLL input frequency */
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#ifdef BOARD_180MHz
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/* PLL Clock Source: CLKIN
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* Main Clock Source: PLL
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* Fout: 220000000
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*/
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# define BOARD_PLL_CLKSEL SYSCON_SYSPLLCLKSEL_CLKIN
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# define BOARD_PLL_SELI 32 /* Bandwidth select I value */
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# define BOARD_PLL_SELP 16 /* Bandwidth select P value */
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# define BOARD_PLL_SELR 0 /* Bandwidth select R value */
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# define BOARD_PLL_MDEC 8191 /* Encoded M-divider coefficient */
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# define BOARD_PLL_NDEC 770 /* Encoded N-divider coefficient */
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# define BOARD_PLL_PDEC 98 /* Encoded P-divider coefficient */
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# define BOARD_PLL_FOUT 180000000U /* Pll output frequency */
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#else /* BOARD_220MHz */
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/* PLL Clock Source: FRO 12MHz
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* Main Clock Source: PLL
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* Fout: 220000000
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*/
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# define BOARD_PLL_CLKSEL SYSCON_SYSPLLCLKSEL_FFRO
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# define BOARD_PLL_SELI 34 /* Bandwidth select I value */
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# define BOARD_PLL_SELP 31 /* Bandwidth select P value */
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# define BOARD_PLL_SELR 0 /* Bandwidth select R value */
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# define BOARD_PLL_MDEC 13243 /* Encoded M-divider coefficient */
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# define BOARD_PLL_NDEC 1 /* Encoded N-divider coefficient */
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# define BOARD_PLL_PDEC 98 /* Encoded P-divider coefficient */
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# define BOARD_PLL_FOUT 220000000 /* Pll output frequency */
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#endif
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#define BOARD_MAIN_CLK BOARD_PLL_FOUT /* Main clock frequency */
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/* CPU Clock:
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*
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* AHB Clock Divider: 1
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* AHB Clock Frequency: 180,000,000 or 220,000,000
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*/
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#define BOARD_AHBCLKDIV 1 /* (un-decremented) */
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#define BOARD_AHB_FREQUENCY (BOARD_MAIN_CLK / BOARD_AHBCLKDIV)
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#define BOARD_CPU_FREQUENCY BOARD_AHB_FREQUENCY
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/* Fraction Rate Generator (FRG) Clock (Optional Flexcomm0 function clock)
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*
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* To use the fractional divider, the DIV value must be programmed with the
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* fixed value of 256. Then:
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*
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* Ffrg = (Finput) / (1 + (MULT / DIV))
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*
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* Mainclock is used as the FRG clock source. Divider must be such that the
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* FRG output frequency is less than equal to 48MHz
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*
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* MUL = (Finput - Ffrg) * 256) / Ffrg
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*/
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/* Revisit: FRGCLK <= 48MHz cannot be realized with the MainClk source */
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#define BOARD FRGCLK_CLKSEL SYSCON_FRGCLKSEL_MAINCLK
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#define BOARD_FRGCLK_INPUT BOARD_MAIN_CLK /* FRG input frequency */
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#define BOARD_FRGCLK 48000000 /* May not be exact */
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/* SysTick: The SysTick clock may be clocked internally either by the by the
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* system clock (CLKSOURCE==1) or by the SysTick function clock (CLKSOURCE==0).
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* The SysTick Function clock is equal to:
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*
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* Fsystick = Fmainclk / SYSTICKCLKDIV
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*
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* Tips for selecting BOARD_SYSTICKCLKDIV: The resulting SysTick reload value
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* should be as large as possible, but must be less than 2^24:
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*
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* SYSTICKDIV > Fmainclk / CLK_TCK / 2^24
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*
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* The logic in lpc54_timerisr.c will always select the SysTick function clock
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* as the source (CLKSOURCE==0). NOTE: When the system tick clock divider is
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* selected as the clock source, the CPU clock must be at least 2.5 times
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* faster than the divider output.
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*
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* SysTick Divider: (SYSTICKCLKDIV)
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*/
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#ifndef CONFIG_SCHED_TICKLESS
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# if CONFIG_USEC_PER_TICK == 10000
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# define BOARD_SYSTICKCLKDIV 1
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# else
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# error Missing SYSTICK divider
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# endif
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# define BOARD_SYSTICK_CLOCK (BOARD_AHB_FREQUENCY / BOARD_SYSTICKCLKDIV)
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#endif
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/* Flexcomm0: REVIST */
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#define BOARD_FLEXCOMM0_CLKSEL SYSCON_FCLKSEL_FRO12M
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#define BOARD_FLEXCOMM0_FCLK LPC54_FRO_12MHZ
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/* EMC */
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#ifdef BOARD_220MHz
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#define BOARD_EMC_CLKDIV 3 /* EMC Clock = CPU FREQ/3 */
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#else /* if BOARD_180MHz */
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#define BOARD_EMC_CLKDIV 2 /* EMC Clock = CPU FREQ/2 */
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#endif
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#define BOARD_EMC_FREQUENCY (BOARD_CPU_FREQUENCY / BOARD_EMC_CLKDIV)
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/* LED definitions *********************************************************/
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/* The LPCXpress-LPC54628 has three user LEDs: D9, D11, and D12. These
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* LEDs are for application use. They are illuminated when the driving
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* signal from the LPC546xx is low. The LEDs are driven by ports P2-2 (D9),
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* P3-3 (D11) and P3-14 (D12).
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*/
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/* LED index values for use with board_userled() */
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#define BOARD_D9 0
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#define BOARD_D11 1
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#ifndef CONFIG_ARCH_LEDS
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# define BOARD_D12 2
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# define BOARD_NLEDS 3
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#else
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# define BOARD_NLEDS 2
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#endif
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/* LED bits for use with board_userled_all() */
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#define BOARD_D9_BIT (1 << BOARD_D9)
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#define BOARD_D11_BIT (1 << BOARD_D11)
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#ifndef CONFIG_ARCH_LEDS
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# define BOARD_D12_BIT (1 << BOARD_D12)
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#endif
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/* These LEDs are not used by the NuttX port unless CONFIG_ARCH_LEDS is
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* defined. In that case, the usage by the board port is defined in
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* include/board.h and src/lpc54_autoleds.c. The LEDs are used to encode
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* OS-related events as follows:
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*/
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/* D9 D11 D12 */
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#define LED_STARTED 0 /* OFF OFF OFF */
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#define LED_HEAPALLOCATE 1 /* ON OFF OFF */
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#define LED_IRQSENABLED 2 /* OFF ON OFF */
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#define LED_STACKCREATED 3 /* OFF OFF OFF */
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#define LED_INIRQ 4 /* NC NC ON (momentary) */
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#define LED_SIGNAL 4 /* NC NC ON (momentary) */
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#define LED_ASSERTION 4 /* NC NC ON (momentary) */
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#define LED_PANIC 4 /* NC NC ON (2Hz flashing) */
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#undef LED_IDLE /* Sleep mode indication not supported */
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/* After booting, LEDs D9 and D11 are avaible for use by the user. If the
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* system booted properly, D9 and D11 should be OFF and D12 should be glowing
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* to indicate that interrupts are occurring. If D12 is flash at 2Hz, then
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* the system has crashed.
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*/
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/* Button definitions *******************************************************/
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/* The LPCXpresso has four switches:
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*
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* SW2 ISP2 P0.6
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* SW3 ISP1 P0.5
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* SW4 ISP0 P0.4
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* SW5 User Button P1.1
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*
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* In all cased, the signal is low when the button is pressed.
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*
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* SW2, SW3, SW4 can be used to force the LPC546xx in to ISP boot modes.
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* After boot these buttons could be used as user buttons. However, they are
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* not available when the on-board SRDRAM is used because P0.4, P0.5, and
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* P0.6 are also used as EMC_D2, EMC_D3, and EMC_D4, respectively.
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*
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* So SW5 is really the only button that that is generally available for
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* software usage.
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*/
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#define BOARD_BUTTON_USER 0
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#define BOARD_NUM_BUTTONS 1
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#define BOARD_BUTTON_USER_BIT (1 << BOARD_BUTTON_USER)
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/* Pin Disambiguation *******************************************************/
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/* Flexcomm0/USART0
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*
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* USART0 connects to the serial bridge on LPC4322JET100 and is typlical used
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* for the serial console.
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*
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* BRIDGE_UART_RXD -> P0_29-ISP_FC0_RXD -> P0.29 GPIO_FC0_RXD_SDA_MOSI_2
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* BRIDGE_UART_TXD <- P0_30-ISP_FC0_TXD <- P0.30 GPIO_FC0_TXD_SCL_MISO_2
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*/
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#define GPIO_USART0_RXD (GPIO_FC0_RXD_SDA_MOSI_2 | GPIO_FILTER_OFF)
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#define GPIO_USART0_TXD (GPIO_FC0_TXD_SCL_MISO_2 | GPIO_FILTER_OFF)
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/* LCD
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*
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* There are no alternatives for LCD pins except for the VD0-VD3 pins.
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* VD0-VD2 are not used in this hardware configuration. VD3 is on
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* P2.21.
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*/
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#define GPIO_LCD_VD3 GPIO_LCD_VD3_1
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* _CONFIGS_LPCXPRESSO_LPC54628_INCLUDE_BOARD_H */
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