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Add saadc-vcc-nrf52832 playground example

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It samples its own VDD without any external circuit!
This commit is contained in:
rbaron 2021-02-23 22:16:58 +01:00
parent 91380796cf
commit 5c81a37d86
5 changed files with 4707 additions and 0 deletions
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code/playground/nrf_sdk/saadc-vcc-nrf52832/.gitignore vendored Normal file
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_build

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code/playground/nrf_sdk/saadc-vcc-nrf52832/Makefile Normal file
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PROJECT_NAME := saadc_pca10040
TARGETS := nrf52832_xxaa
OUTPUT_DIRECTORY := _build
# SDK_ROOT := ../../../../../..
PROJ_DIR := ./src
$(OUTPUT_DIRECTORY)/nrf52832_xxaa.out: \
LINKER_SCRIPT := saadc_gcc_nrf52.ld
# Source files common to all targets
SRC_FILES += \
$(SDK_ROOT)/modules/nrfx/mdk/gcc_startup_nrf52.S \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_rtt.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_serial.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_uart.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_default_backends.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_frontend.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_str_formatter.c \
$(SDK_ROOT)/components/boards/boards.c \
$(SDK_ROOT)/components/libraries/util/app_error.c \
$(SDK_ROOT)/components/libraries/util/app_error_handler_gcc.c \
$(SDK_ROOT)/components/libraries/util/app_error_weak.c \
$(SDK_ROOT)/components/libraries/util/app_util_platform.c \
$(SDK_ROOT)/components/libraries/util/nrf_assert.c \
$(SDK_ROOT)/components/libraries/atomic/nrf_atomic.c \
$(SDK_ROOT)/components/libraries/balloc/nrf_balloc.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf_format.c \
$(SDK_ROOT)/components/libraries/memobj/nrf_memobj.c \
$(SDK_ROOT)/components/libraries/pwr_mgmt/nrf_pwr_mgmt.c \
$(SDK_ROOT)/components/libraries/ringbuf/nrf_ringbuf.c \
$(SDK_ROOT)/components/libraries/experimental_section_vars/nrf_section_iter.c \
$(SDK_ROOT)/components/libraries/strerror/nrf_strerror.c \
$(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_ppi.c \
$(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_uart.c \
$(SDK_ROOT)/modules/nrfx/soc/nrfx_atomic.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_ppi.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/prs/nrfx_prs.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_saadc.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_timer.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uart.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uarte.c \
$(PROJ_DIR)/main.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_Syscalls_GCC.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \
$(SDK_ROOT)/modules/nrfx/mdk/system_nrf52.c \
# Include folders common to all targets
INC_FOLDERS += \
$(SDK_ROOT)/components \
$(SDK_ROOT)/modules/nrfx/mdk \
$(PROJ_DIR) \
$(SDK_ROOT)/components/libraries/pwr_mgmt \
$(SDK_ROOT)/components/libraries/strerror \
$(SDK_ROOT)/components/toolchain/cmsis/include \
$(SDK_ROOT)/components/libraries/util \
./config \
$(SDK_ROOT)/components/libraries/balloc \
$(SDK_ROOT)/components/libraries/ringbuf \
$(SDK_ROOT)/modules/nrfx/hal \
$(SDK_ROOT)/components/libraries/bsp \
$(SDK_ROOT)/components/libraries/log \
$(SDK_ROOT)/modules/nrfx \
$(SDK_ROOT)/components/libraries/experimental_section_vars \
$(SDK_ROOT)/integration/nrfx/legacy \
$(SDK_ROOT)/components/libraries/mutex \
$(SDK_ROOT)/components/libraries/delay \
$(SDK_ROOT)/integration/nrfx \
$(SDK_ROOT)/components/drivers_nrf/nrf_soc_nosd \
$(SDK_ROOT)/external/segger_rtt \
$(SDK_ROOT)/components/boards \
$(SDK_ROOT)/components/libraries/memobj \
$(SDK_ROOT)/modules/nrfx/drivers/include \
$(SDK_ROOT)/components/libraries/log/src \
$(SDK_ROOT)/external/fprintf \
$(SDK_ROOT)/components/libraries/atomic \
# Libraries common to all targets
LIB_FILES += \
# Optimization flags
OPT = -O3 -g3
# Uncomment the line below to enable link time optimization
#OPT += -flto
# C flags common to all targets
CFLAGS += $(OPT)
CFLAGS += -DBOARD_PCA10040
CFLAGS += -DBSP_DEFINES_ONLY
CFLAGS += -DCONFIG_GPIO_AS_PINRESET
CFLAGS += -DFLOAT_ABI_HARD
CFLAGS += -DNRF52
CFLAGS += -DNRF52832_XXAA
CFLAGS += -DNRF52_PAN_74
CFLAGS += -mcpu=cortex-m4
CFLAGS += -mthumb -mabi=aapcs
CFLAGS += -Wall -Werror
CFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
# keep every function in a separate section, this allows linker to discard unused ones
CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
CFLAGS += -fno-builtin -fshort-enums
# C++ flags common to all targets
CXXFLAGS += $(OPT)
# Assembler flags common to all targets
ASMFLAGS += -g3
ASMFLAGS += -mcpu=cortex-m4
ASMFLAGS += -mthumb -mabi=aapcs
ASMFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
ASMFLAGS += -DBOARD_PCA10040
ASMFLAGS += -DBSP_DEFINES_ONLY
ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET
ASMFLAGS += -DFLOAT_ABI_HARD
ASMFLAGS += -DNRF52
ASMFLAGS += -DNRF52832_XXAA
ASMFLAGS += -DNRF52_PAN_74
# Linker flags
LDFLAGS += $(OPT)
LDFLAGS += -mthumb -mabi=aapcs -L$(SDK_ROOT)/modules/nrfx/mdk -T$(LINKER_SCRIPT)
LDFLAGS += -mcpu=cortex-m4
LDFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
# let linker dump unused sections
LDFLAGS += -Wl,--gc-sections
# use newlib in nano version
LDFLAGS += --specs=nano.specs
nrf52832_xxaa: CFLAGS += -D__HEAP_SIZE=8192
nrf52832_xxaa: CFLAGS += -D__STACK_SIZE=8192
nrf52832_xxaa: ASMFLAGS += -D__HEAP_SIZE=8192
nrf52832_xxaa: ASMFLAGS += -D__STACK_SIZE=8192
# Add standard libraries at the very end of the linker input, after all objects
# that may need symbols provided by these libraries.
LIB_FILES += -lc -lnosys -lm
.PHONY: default help
# Default target - first one defined
default: nrf52832_xxaa
# Print all targets that can be built
help:
@echo following targets are available:
@echo nrf52832_xxaa
@echo sdk_config - starting external tool for editing sdk_config.h
@echo flash - flashing binary
TEMPLATE_PATH := $(SDK_ROOT)/components/toolchain/gcc
include $(TEMPLATE_PATH)/Makefile.common
$(foreach target, $(TARGETS), $(call define_target, $(target)))
.PHONY: flash erase
# Flash the program
flash: default
@echo Flashing: $(OUTPUT_DIRECTORY)/nrf52832_xxaa.hex
nrfjprog -f nrf52 --program $(OUTPUT_DIRECTORY)/nrf52832_xxaa.hex --sectorerase
nrfjprog -f nrf52 --reset
erase:
nrfjprog -f nrf52 --eraseall
SDK_CONFIG_FILE := ../config/sdk_config.h
CMSIS_CONFIG_TOOL := $(SDK_ROOT)/external_tools/cmsisconfig/CMSIS_Configuration_Wizard.jar
sdk_config:
java -jar $(CMSIS_CONFIG_TOOL) $(SDK_CONFIG_FILE)

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code/playground/nrf_sdk/saadc-vcc-nrf52832/config/sdk_config.h Normal file
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code/playground/nrf_sdk/saadc-vcc-nrf52832/saadc_gcc_nrf52.ld Normal file
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/* Linker script to configure memory regions. */
SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)
MEMORY
{
FLASH (rx) : ORIGIN = 0x0, LENGTH = 0x80000
RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x10000
}
SECTIONS
{
}
SECTIONS
{
. = ALIGN(4);
.mem_section_dummy_ram :
{
}
.log_dynamic_data :
{
PROVIDE(__start_log_dynamic_data = .);
KEEP(*(SORT(.log_dynamic_data*)))
PROVIDE(__stop_log_dynamic_data = .);
} > RAM
.log_filter_data :
{
PROVIDE(__start_log_filter_data = .);
KEEP(*(SORT(.log_filter_data*)))
PROVIDE(__stop_log_filter_data = .);
} > RAM
} INSERT AFTER .data;
SECTIONS
{
.mem_section_dummy_rom :
{
}
.pwr_mgmt_data :
{
PROVIDE(__start_pwr_mgmt_data = .);
KEEP(*(SORT(.pwr_mgmt_data*)))
PROVIDE(__stop_pwr_mgmt_data = .);
} > FLASH
.log_const_data :
{
PROVIDE(__start_log_const_data = .);
KEEP(*(SORT(.log_const_data*)))
PROVIDE(__stop_log_const_data = .);
} > FLASH
.log_backends :
{
PROVIDE(__start_log_backends = .);
KEEP(*(SORT(.log_backends*)))
PROVIDE(__stop_log_backends = .);
} > FLASH
.nrf_balloc :
{
PROVIDE(__start_nrf_balloc = .);
KEEP(*(.nrf_balloc))
PROVIDE(__stop_nrf_balloc = .);
} > FLASH
} INSERT AFTER .text
INCLUDE "nrf_common.ld"

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code/playground/nrf_sdk/saadc-vcc-nrf52832/src/main.c Normal file
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/**
* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, 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.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
*
*/
/** @file
* @defgroup nrf_adc_example main.c
* @{
* @ingroup nrf_adc_example
* @brief ADC Example Application main file.
*
* This file contains the source code for a sample application using ADC.
*
* @image html example_board_setup_a.jpg "Use board setup A for this example."
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nrf.h"
#include "nrf_drv_saadc.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_timer.h"
#include "boards.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "app_util_platform.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define SAMPLES_IN_BUFFER 5
volatile uint8_t state = 1;
static const nrf_drv_timer_t m_timer = NRF_DRV_TIMER_INSTANCE(0);
static nrf_saadc_value_t m_buffer_pool[2][SAMPLES_IN_BUFFER];
static nrf_ppi_channel_t m_ppi_channel;
static uint32_t m_adc_evt_counter;
void timer_handler(nrf_timer_event_t event_type, void * p_context)
{
}
void saadc_sampling_event_init(void)
{
ret_code_t err_code;
err_code = nrf_drv_ppi_init();
APP_ERROR_CHECK(err_code);
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
timer_cfg.bit_width = NRF_TIMER_BIT_WIDTH_32;
err_code = nrf_drv_timer_init(&m_timer, &timer_cfg, timer_handler);
APP_ERROR_CHECK(err_code);
/* setup m_timer for compare event every 400ms */
uint32_t ticks = nrf_drv_timer_ms_to_ticks(&m_timer, 400);
nrf_drv_timer_extended_compare(&m_timer,
NRF_TIMER_CC_CHANNEL0,
ticks,
NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK,
false);
nrf_drv_timer_enable(&m_timer);
uint32_t timer_compare_event_addr = nrf_drv_timer_compare_event_address_get(&m_timer,
NRF_TIMER_CC_CHANNEL0);
uint32_t saadc_sample_task_addr = nrf_drv_saadc_sample_task_get();
/* setup ppi channel so that timer compare event is triggering sample task in SAADC */
err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_assign(m_ppi_channel,
timer_compare_event_addr,
saadc_sample_task_addr);
APP_ERROR_CHECK(err_code);
}
void saadc_sampling_event_enable(void)
{
ret_code_t err_code = nrf_drv_ppi_channel_enable(m_ppi_channel);
APP_ERROR_CHECK(err_code);
}
void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
{
ret_code_t err_code;
err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
int i;
NRF_LOG_INFO("ADC event number: %d", (int)m_adc_evt_counter);
for (i = 0; i < SAMPLES_IN_BUFFER; i++)
{
NRF_LOG_INFO("%d", p_event->data.done.p_buffer[i]);
}
m_adc_evt_counter++;
}
}
void saadc_init(void)
{
ret_code_t err_code;
// Using NRF_SAADC_INPUT_VDD connects the SAADC to the internal Vdd.
nrf_saadc_channel_config_t channel_config =
// NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN0);
NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD);
err_code = nrf_drv_saadc_init(NULL, saadc_callback);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_channel_init(0, &channel_config);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
uint32_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
ret_code_t ret_code = nrf_pwr_mgmt_init();
APP_ERROR_CHECK(ret_code);
saadc_init();
saadc_sampling_event_init();
saadc_sampling_event_enable();
NRF_LOG_INFO("SAADC HAL simple example started.");
while (1)
{
nrf_pwr_mgmt_run();
NRF_LOG_FLUSH();
}
}
/** @} */