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https://github.com/openmv/openmv.git
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238 lines
6.8 KiB
C
238 lines
6.8 KiB
C
/* Copyright (C) 2023 Alif Semiconductor - All Rights Reserved.
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* Use, distribution and modification of this code is permitted under the
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* terms stated in the Alif Semiconductor Software License Agreement
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*
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* You should have received a copy of the Alif Semiconductor Software
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* License Agreement with this file. If not, please write to:
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* contact@alifsemi.com, or visit: https://alifsemi.com/license
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*/
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/**************************************************************************//**
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* @file : ADC_Potentiometer_Baremetal.c
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* @author : Prabhakar kumar
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* @email : prabhakar.kumar@alifsemi.com
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* @version : V1.0.0
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* @date : 15-SEPT-2023
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* @brief : Baremetal demo application code for potentiometer input
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* - Internal input of potentiometer in analog signal corresponding
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* output is digital value.
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* - the input from the potentiometer is internally connected to
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* the ADC121 instance channel_1(j11 Pin 10).
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* - the converted digital value are stored in user provided memory
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* address.
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*
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* Hardware Connection:
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* Analog variable register R53 is connected internally to the ADC121
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* channel_1 which volatge vary from 0 to 1.8V
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******************************************************************************/
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/* System Includes */
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#include <stdio.h>
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#include "system_utils.h"
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/* include for ADC Driver */
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#include "Driver_ADC.h"
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/* PINMUX include */
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#include "pinconf.h"
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#include "se_services_port.h"
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#include "RTE_Components.h"
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#if defined(RTE_Compiler_IO_STDOUT)
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#include "retarget_stdout.h"
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#endif /* RTE_Compiler_IO_STDOUT */
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/* single shot conversion scan use ARM_ADC_SINGLE_SHOT_CH_CONV*/
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#define ADC_CONVERSION ARM_ADC_SINGLE_SHOT_CH_CONV
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/* Instance for ADC12 */
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extern ARM_DRIVER_ADC Driver_ADC121;
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static ARM_DRIVER_ADC *ADCdrv = &Driver_ADC121;
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#define POTENTIOMETER ARM_ADC_CHANNEL_1
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#define NUM_CHANNELS (8)
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/* Demo purpose adc_sample*/
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uint32_t adc_sample[NUM_CHANNELS];
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volatile uint32_t num_samples = 0;
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/**
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* @fn static int32_t pinmux_config(void)
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* @brief ADC potentiometer pinmux configuration
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* @retval execution status.
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*/
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static int32_t pinmux_config(void)
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{
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int32_t ret = 0U;
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ret = pinconf_set(PORT_0, PIN_7, PINMUX_ALTERNATE_FUNCTION_7,
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PADCTRL_READ_ENABLE );
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if(ret)
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{
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printf("ERROR: Failed to configure PINMUX \r\n");
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return ret;
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}
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return ret;
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}
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/*
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* @func : void adc_conversion_callback(uint32_t event, uint8_t channel, uint32_t sample_output)
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* @brief : adc conversion isr callback
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* @return : NONE
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*/
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static void adc_conversion_callback(uint32_t event, uint8_t channel, uint32_t sample_output)
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{
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if (event & ARM_ADC_EVENT_CONVERSION_COMPLETE)
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{
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num_samples += 1;
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/* Store the value for the respected channels */
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adc_sample[channel] = sample_output;
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}
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}
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/**
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* @func : void adc_potentiometer_demo()
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* @brief : ADC Potentiometer demo
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* - test to verify the potentiometer analog input
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* - Internal input of potentiometer in analog signal corresponding
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* output is digital value.
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* - converted value is the allocated user memory address.
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* @return : NONE
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*/
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void adc_potentiometer_demo()
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{
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int32_t ret = 0;
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uint32_t error_code = SERVICES_REQ_SUCCESS;
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uint32_t service_error_code;
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ARM_DRIVER_VERSION version;
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/* Initialize the SE services */
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se_services_port_init();
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/* enable the 160 MHz clock */
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error_code = SERVICES_clocks_enable_clock(se_services_s_handle,
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/*clock_enable_t*/ CLKEN_CLK_160M,
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/*bool enable */ true,
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&service_error_code);
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if(error_code)
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{
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printf("SE Error: 160 MHz clk enable = %d\n", error_code);
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return;
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}
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printf("\t\t\n >>> ADC demo starting up!!! <<< \r\n");
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version = ADCdrv->GetVersion();
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printf("\r\n ADC version api:%X driver:%X...\r\n",version.api, version.drv);
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/* PINMUX */
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ret = pinmux_config();
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if(ret != 0)
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{
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printf("Error in pin-mux configuration\n");
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return;
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}
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/* Initialize ADC driver */
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ret = ADCdrv->Initialize(adc_conversion_callback);
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC init failed\n");
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return;
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}
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/* Power control ADC */
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ret = ADCdrv->PowerControl(ARM_POWER_FULL);
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC Power up failed\n");
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goto error_uninitialize;
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}
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/* set conversion mode */
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ret = ADCdrv->Control(ARM_ADC_CONVERSION_MODE_CTRL, ADC_CONVERSION);
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC select conversion mode failed\n");
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goto error_poweroff;
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}
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/* set initial channel */
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ret = ADCdrv->Control(ARM_ADC_CHANNEL_INIT_VAL, POTENTIOMETER);
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC channel init failed\n");
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goto error_poweroff;
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}
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printf(">>> Allocated memory buffer Address is 0x%X <<<\n",(uint32_t)(adc_sample + POTENTIOMETER));
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/* Start ADC */
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ret = ADCdrv->Start();
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC Start failed\n");
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goto error_poweroff;
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}
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/* wait for timeout */
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while(!(num_samples == 1));
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printf("\n Potentiometer conversion completed \n");
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/* Stop ADC */
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ret = ADCdrv->Stop();
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if(ret != ARM_DRIVER_OK){
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printf("\r\n Error: ADC Stop failed\n");
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goto error_poweroff;
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}
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printf("\n ---END--- \r\n wait forever >>> \n");
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while(1);
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error_poweroff:
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/* Power off ADC peripheral */
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ret = ADCdrv->PowerControl(ARM_POWER_OFF);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: ADC Power OFF failed.\r\n");
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}
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error_uninitialize:
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/* Un-initialize ADC driver */
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ret = ADCdrv->Uninitialize();
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: ADC Uninitialize failed.\r\n");
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}
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/* disable the 160MHz clock */
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error_code = SERVICES_clocks_enable_clock(se_services_s_handle,
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/*clock_enable_t*/ CLKEN_CLK_160M,
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/*bool enable */ false,
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&service_error_code);
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if(error_code)
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{
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printf("SE Error: 160 MHz clk disable = %d\n", error_code);
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return;
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}
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printf("\r\n ADC demo exiting...\r\n");
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}
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/* Define main entry point. */
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int main()
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{
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#if defined(RTE_Compiler_IO_STDOUT_User)
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int32_t ret;
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ret = stdout_init();
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if(ret != ARM_DRIVER_OK)
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{
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while(1)
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{
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}
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}
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#endif
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/* Enter the demo Application. */
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adc_potentiometer_demo();
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return 0;
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}
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