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Merge pull request #5 from kuldeepdhaka/efm32lg
Basic example for EFM32LG
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‎Makefile

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@@ -23,7 +23,7 @@ PREFIX ?= arm-none-eabi
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TARGETS := stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/l0 stm32/l1
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TARGETS += lpc/lpc13xx lpc/lpc17xx #lpc/lpc43xx
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TARGETS += tiva/lm3s tiva/lm4f
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TARGETS += efm32/efm32tg efm32/efm32g efm32/efm32lg efm32/efm32gg
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TARGETS += efm32/tg efm32/g efm32/lg efm32/gg
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TARGETS += vf6xx
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TARGETS += qemu
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‎examples/efm32/Makefile.include

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##
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## This file is part of the unicore-mx project.
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##
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## Copyright (C) 2015 Kuldeep Singh Dhaka <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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COMMON_DIR = ../../../../common
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include ../../../../Makefile.rules

‎examples/efm32/lg/Makefile.include

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##
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## This file is part of the unicore-mx project.
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##
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## Copyright (C) 2009 Uwe Hermann <[email protected]>
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## Copyright (C) 2010 Piotr Esden-Tempski <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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LIBNAME = ucmx_efm32lg
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DEFS = -DEFM32LG
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FP_FLAGS ?= -msoft-float
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ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS)
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################################################################################
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# OpenOCD specific variables
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OOCD ?= openocd
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OOCD_INTERFACE ?= flossjtag
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OOCD_BOARD ?= efm32
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################################################################################
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# Black Magic Probe specific variables
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# Set the BMP_PORT to a serial port and then BMP is used for flashing
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BMP_PORT ?=
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################################################################################
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# texane/stlink specific variables
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#STLINK_PORT ?= :4242
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include ../../../Makefile.include

‎examples/efm32/lg/efm32lg-stk3600/adc-timer-dma/Makefile

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##
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## This file is part of the unicore-mx project.
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##
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## Copyright (C) 2009 Uwe Hermann <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = adc-timer-dma
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LDSCRIPT = ../efm32lg-stk3600.ld
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include ../../Makefile.include
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‎examples/efm32/lg/efm32lg-stk3600/adc-timer-dma/adc-timer-dma.c

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/*
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* This file is part of the unicore-mx project.
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*
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* Copyright (C) 2015 Kuldeep Singh Dhaka <[email protected]>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <unicore-mx/efm32/cmu.h>
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#include <unicore-mx/efm32/gpio.h>
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#include <unicore-mx/efm32/dma.h>
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#include <unicore-mx/efm32/adc.h>
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#include <unicore-mx/efm32/prs.h>
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#include <unicore-mx/efm32/timer.h>
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#define SAMPLES_COUNT 1000
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static uint16_t samples[SAMPLES_COUNT] __attribute__((aligned(16)));
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/* we need only 1 channel (0th channel) */
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static uint8_t dma_desc_mem[DMA_DESC_CH_SIZE * 1] __attribute__((aligned(256)));
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static void clock_setup(void)
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{
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cmu_clock_setup_in_hfxo_out_48mhz();
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cmu_periph_clock_enable(CMU_GPIO);
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cmu_periph_clock_enable(CMU_ADC0);
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cmu_periph_clock_enable(CMU_DMA);
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cmu_periph_clock_enable(CMU_TIMER0);
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cmu_periph_clock_enable(CMU_PRS);
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}
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static void led_setup(void)
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{
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gpio_clear(GPIOE, GPIO2);
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gpio_mode_setup(GPIOE, GPIO_MODE_PUSH_PULL, GPIO2);
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}
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static void adc_setup(void)
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{
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/*
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* Tconv = (Ta + N) * OVS
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* (Tconv / 12Mhz) < (1 / 500Khz) [500Khz is timer (PRS CH0) trigger rate]
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* Tconv < (120 / 5)
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* Tconv < 24
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*
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* we need atleast 12bit resolution, N = 13
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* (Ta + 13) * OVS < 24
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* for OVS = 1
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*
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* Ta < 11
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* so, Ta = 8
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* Acquisition time = 8 cycles
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*/
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/*
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* ADC Warm up = 48Mhz / Timebase = 48Mhz / (95 + 1) = 2us (and is <= 1us)
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* prescalar = 48Mhz / (3 + 1) = 12Mhz (and is <= 13Mhz)
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* keep adc warm between samples
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*/
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/* TODO: workaround(ADC_E117) */
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ADC0_CTRL = ADC_CTRL_TIMEBASE(95) | ADC_CTRL_PRESC(3) |
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ADC_CTRL_WARMUPMODE_KEEPADCWARM;
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/*
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* get trigger from PRS Ch0 (connected to timer0, at 500Khz)
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* Reference: VDD
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* Acquisition Time: 8 ADC Clocks
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* Resolution: 12bit
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* Channels: {0, 1, 2, 3, 4, 5, 6, 7}
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*/
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ADC0_SCANCTRL = ADC_SCANCTRL_PRSSEL_PRSCH0 | ADC_SCANCTRL_PRSEN |
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ADC_SCANCTRL_AT_8CYCLES | ADC_SCANCTRL_REF_VDD |
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ADC_SCANCTRL_INPUTSEL_CH0 | ADC_SCANCTRL_INPUTSEL_CH1 |
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ADC_SCANCTRL_INPUTSEL_CH2 | ADC_SCANCTRL_INPUTSEL_CH3 |
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ADC_SCANCTRL_INPUTSEL_CH4 | ADC_SCANCTRL_INPUTSEL_CH5 |
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ADC_SCANCTRL_INPUTSEL_CH6 | ADC_SCANCTRL_INPUTSEL_CH7 |
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ADC_SCANCTRL_RES_12BIT;
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}
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static void dma_setup(void)
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{
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uint32_t dma_desc = (uint32_t) dma_desc_mem;
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/* DMA global */
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DMA_CONFIG = DMA_CONFIG_EN;
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DMA_CTRLBASE = dma_desc;
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/* channel descriptor */
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uint16_t n_minus_1 = SAMPLES_COUNT - 1;
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DMA_DESC_CHx_CFG(dma_desc, 0) =
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DMA_DESC_CH_CFG_DEST_INC_HALFWORD | DMA_DESC_CH_CFG_DEST_SIZE_HALFWORD |
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DMA_DESC_CH_CFG_SRC_INC_NOINC | DMA_DESC_CH_CFG_SRC_SIZE_HALFWORD |
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DMA_DESC_CH_CFG_R_POWER(DMA_R_POWER_1) | DMA_DESC_CH_CFG_CYCLE_CTRL_BASIC |
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DMA_DESC_CH_CFG_N_MINUS_1(n_minus_1);
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DMA_DESC_CHx_DEST_DATA_END_PTR(dma_desc, 0) = ((uint32_t) samples) + (n_minus_1 << 1);
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DMA_DESC_CHx_SRC_DATA_END_PTR(dma_desc, 0) = (uint32_t) &ADC0_SCANDATA;
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/* Channel 0 */
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DMA_CH0_CTRL = DMA_CH_CTRL_SOURCESEL_ADC0 | DMA_CH_CTRL_SIGSEL_ADC0SCAN;
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DMA_CHREQMASKC = DMA_CHREQMASKC_CH0SREQMASKC;
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DMA_RDS = DMA_RDS_RDSCH0;
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DMA_CHENS = DMA_CHENS_CH0SENS;
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}
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static void timer_setup(void)
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{
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TIMER0_TOP = (48 * 2 * 8) - 1;
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}
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static void prs_setup(void)
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{
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PRS_CH0_CTRL = PRS_CH_CTRL_SOURCESEL_TIMER0 | PRS_CH_CTRL_SIGSEL_TIMER0OF;
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}
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int main(void)
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{
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clock_setup();
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led_setup();
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adc_setup();
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dma_setup();
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timer_setup();
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prs_setup();
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/* start timer */
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TIMER0_CMD = TIMER_CMD_START;
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/* wait till dma not received data */
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while(!(DMA_IF & DMA_IF_CH0DONE));
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/* stop timer */
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TIMER0_CMD = TIMER_CMD_STOP;
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/* turn "LED0" on */
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gpio_set(GPIOE, GPIO2);
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while(1);
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return 0;
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}

‎examples/efm32/lg/efm32lg-stk3600/button/Makefile

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##
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## This file is part of the unicore-mx project.
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##
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## Copyright (C) 2009 Uwe Hermann <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
8+
## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
13+
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = button
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LDSCRIPT = ../efm32lg-stk3600.ld
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include ../../Makefile.include
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‎examples/efm32/lg/efm32lg-stk3600/button/README.md

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# README
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This example blinks the yellow LED "LED0" on the SiLabs EFM32LG-STK3600 eval board.
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When you press the 'PB0' button, the blinking is faster.
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## Board connections:
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*none required*

‎examples/efm32/lg/efm32lg-stk3600/button/button.c

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/*
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* This file is part of the unicore-mx project.
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*
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* Copyright (C) 2009 Uwe Hermann <[email protected]>,
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* Copyright (C) 2010 Piotr Esden-Tempski <[email protected]>
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* Copyright (C) 2011 Stephen Caudle <[email protected]>
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* Copyright (C) 2015 Kuldeep Singh Dhaka <[email protected]>
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*
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* This library is free software: you can redistribute it and/or modify
10+
* it under the terms of the GNU Lesser General Public License as published by
11+
* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
16+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17+
* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
20+
* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <unicore-mx/efm32/cmu.h>
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#include <unicore-mx/efm32/gpio.h>
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#define BUTTON_PORT GPIOB
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#define BUTTON_PIN GPIO9
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#define LED_PORT GPIOE
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#define LED_PIN GPIO2
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static void clock_setup(void)
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{
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/* Enable GPIO clock. */
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cmu_periph_clock_enable(CMU_GPIO);
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}
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static void led_setup(void)
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{
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/* Set "LED0" to 'output push-pull'. */
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gpio_mode_setup(LED_PORT, GPIO_MODE_PUSH_PULL, LED_PIN);
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}
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static void button_setup(void)
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{
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/* Set button "PB0" to 'input'. */
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gpio_clear(BUTTON_PORT, BUTTON_PIN);
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gpio_mode_setup(BUTTON_PORT, GPIO_MODE_INPUT, BUTTON_PIN);
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}
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int main(void)
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{
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unsigned i;
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clock_setup();
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led_setup();
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button_setup();
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/* Blink the LED0 on the board. */
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while (1) {
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gpio_toggle(LED_PORT, LED_PIN);
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/* Upon button press, blink more slowly. */
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if (gpio_get(BUTTON_PORT, BUTTON_PIN)) {
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for (i = 0; i < 300000; i++) { /* Wait a bit. */
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__asm__("nop");
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}
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}
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for (i = 0; i < 300000; i++) { /* Wait a bit. */
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__asm__("nop");
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}
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}
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return 0;
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}

‎examples/efm32/lg/efm32lg-stk3600/dac-static-value/Makefile

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##
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## This file is part of the unicore-mx project.
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##
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## Copyright (C) 2009 Uwe Hermann <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
13+
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14+
## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = dac-static-value
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LDSCRIPT = ../efm32lg-stk3600.ld
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include ../../Makefile.include
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