[ADC/AFE]

请问有关于CS32A010系列的ADC模块的单端采样例程吗；

2024-7-26 18:13:19 1236 adc

0 使用CS32A010K8V7的MCU进行ADC中断单端采样，无法采到一个稳定的值，不断的在变化，请问如何解决； int main(void) { adc_config_t adc_config; pga_config_t pga_config; vref_config_t vref_config; /* Init USART1 / //cs_eval_com_init(); //printf("ADC convert example!\r\n"); / Interrupt every 1ms / SysTick_Config(SystemCoreClock / 1000); delay(2000); / Clock enable / __RCU_AHB_CLK_ENABLE(RCU_AHB_PERI_GPIOA); __RCU_APB1_CLK_ENABLE(RCU_APB1_PERI_ADADC); __RCU_FUNC_ENABLE(LRC2_CLK); / adc clock = LRC2(1.024MHz) / rcu_adcclk_config(RCU_ADCLK_CFG_LRC2); if(rcu_lrc2_stabilization_wait() == ERROR) { //printf("LRC2 not ready\r\n"); / Stop here / while(1); } else { //printf("LRC2 ready\r\n"); } adc_def_init(ADC1); / Step1:Inner-vref must soft start / adc_vref_soft_start(ADC1); / Step2:Config AD-ADC / adc_config_struct_init(&adc_config); adc_config.abandont_num = ADC_ABANDONT_DATA_4; adc_config.average_num = ADC_AVERAGE_NUM_16; adc_config.convert_mode = ADC_SINGLE_CONVERT_MODE; adc_config.data_rate = ADC_DATARATE_MODE_4; adc_config.gain_select = ADC_GAIN_1; adc_config.ovrwr_mode = ADC_DATA_OVER_WRITE; adc_config.power_mode = ADC_HIGH_POWER_MODE; adc_config.rst_num = ADC_RST_CYCLE_2048; adc_config.setup_time = ADC_SETUP_TIME_CYCLE_2048; adc_init(ADC1, &adc_config); / Step3:Config PGA / pga_config.din_select = PGA_BOTH_PMOS_NMOS; pga_config.pga1_enable = ENABLE; pga_config.pga_chop = PGA_CHOP_DISABLE; pga_config.pga_gain = ADC_PGA_GAIN_1; adc_pga_init(&pga_config); / Step4:Config VREF / vref_config.buffer_enable = ENABLE; vref_config.driver = ADC_VREF_DRV_MAX_5MA; vref_config.ref_select = ADC_REF_SELECT_INNER_2P048V; vref_config.vref_enable = ENABLE; adc_vref_init(&vref_config); / Step5:Filter select / adc_digital_filter_select(ADC1, ADC_FILTER_LOW_LATENCY); / Step6:trigger config -- soft / adc_trigger_config(ADC1, ADC_TRIGGER_MODE_SOFT, ADC_TRIGGER_SRC_RTC); adc_chop_freq_set(ADC1,ADC_CHOP_DIV_256); / ADC_FILTER_LOW_LATENCY Inner channel for calibrate N:VREFP/2 P:VREFP/2 / adc_channel_config(ADC1, ADC_INPUT_CHANNEL_14, ADC_INPUT_CHANNEL_14); while(!adc_software_calibration_set(ADC1,&adc_config,&pga_config,&vref_config)); adc_nvic_config(); while(1) { / ADC_FILTER_LOW_LATENCY Outer channel P:ADCIN1 N:ADCIN0 / adc_channel_config(ADC1, ADC_INPUT_CHANNEL_0, ADC_INPUT_CHANNEL_0); `if(__ADC_FLAG_STATUS_GET(ADC1, ADC_FLAG_DATA_EOCH) == RESET) { adc_conversion_start(ADC1); } delay(200);` } } void ADC1_IRQHandler(void) { `if(__ADC_FLAG_STATUS_GET(ADC1,ADC_FLAG_DATA_EOCH)) { adc_data_convert_low_latency(__ADC_CONV_VALUE_GET(ADC1)); } if(__ADC_FLAG_STATUS_GET(ADC1,ADC_FLAG_WDG_EVENT)) { printf("out range !!!!!\r\n"); __ADC_FLAG_CLEAR(ADC1,ADC_FLAG_WDG_EVENT); } printf("end!!! \r\n\n");` } void adc_data_convert_low_latency(uint32_t adc_data) { `if(adc_data & 0x800000) { adc_data = (~(adc_data & 0xFFFFFF))+1; adc_data &= 0x00FFFFFF; gconvt_data = (double)adc_data 1.0235074 * 2.048 / 0x7FFFFF; //printf("adc_data %x, adc convert value -%fV \r\n", adc_data,convt_data); } else { adc_data &= 0x00FFFFFF; gconvt_data = (double)adc_data * 1.0235074 * 2.048/ 0x7FFFFF; //printf("adc_data %x, adc convert value +%fV \r\n", adc_data,convt_data); }` } 根据pack包中的ChipSea.CS32A01X_DFP.1.1.3中ADC_Intterupt例程更改的，ADC采样不完整； 0 本主题由 liuyongwangzi 于 2024-7-26 18:25 添加图标推荐
2024-7-26 18:13:19　　 1 评论淘帖0 举报相关推荐 • CS32A010 关于ADC采样问题 695 • 芯海CS32A010开发例程 8 • CS32A010 3505 • CS32A010求助 1043 • 求CS32A010的keil芯片包和start 例程 732 • CS32A010 PGA增益有误 408 • 求CS32A010的keil芯片包和SDK例程 836 • CS32A010求例程及开发资料 792 • CS32A010 系列的PGA放大倍数的设置问题 5966 • 求最新CS32A010的SDK开发包 804 1 条评论 wawjik2008 2024-9-20 16:33 参考下这个配置： __RCU_AHB_CLK_ENABLE(RCU_AHB_PERI_GPIOA); //打开GPIO时钟 __RCU_APB1_CLK_ENABLE(RCU_APB1_PERI_ADADC); //打开ADC时钟 rcu_adcclk_config(adcfs); //配置adc时钟源 adc_def_init(ADC1); //去初始化ADC gpio_mode_set(GPIOA,GPIO_PIN_2,GPIO_MODE_ANALOG); //配置输入通道GPIO gpio_mode_set(GPIOA,GPIO_PIN_3,GPIO_MODE_ANALOG); //配置输入通道GPIO gpio_mode_set(GPIOA,GPIO_PIN_4,GPIO_MODE_ANALOG); //配置输入通道GPIO gpio_mode_set(GPIOA,GPIO_PIN_5,GPIO_MODE_ANALOG); //配置输入通道GPIO adc_config_t ADC_InitStructure; ADC_InitStructure.data_rate = ADC_DATARATE_MODE_4; //配置输出数据速率:每秒采样次数 2:10sps 3:16sps 4:20sps 5:50sps 6：60sps 7:100sps 8:200sps 9:400sps ADC_InitStructure.gain_select = ADC_GAIN_1; //ADC增益档位选择：1倍、两倍 ADC_InitStructure.setup_time = ADC_SETUP_TIME_CYCLE_2048; //配置ADC第一次转换建立时间档位 ADC_InitStructure.average_num = ADC_AVERAGE_NUM_16; //配置ADC平均次数 ADC_InitStructure.abandont_num = ADC_ABANDONT_DATA_5; //配置ADC丢弃前x笔数据 ADC_InitStructure.convert_mode = ADC_SINGLE_CONVERT_MODE; //配置ADC转换模式 ADC_InitStructure.ovrwr_mode = ADC_DATA_OVER_WRITE; //配置ADC数据溢出时覆盖模式 ADC_InitStructure.power_mode = ADC_HIGH_POWER_MODE; //配置ADC工作模式：高功耗或低功耗 ADC_InitStructure.rst_num = ADC_RST_CYCLE_2048; //配置每次通道切换ADC复位周期个数 adc_init(ADC1,&ADC_InitStructure); pga_config_t PGA_InitStructure; PGA_InitStructure.pga_gain = ADC_PGA_GAIN_1; //配置PGA档位 PGA_InitStructure.din_select = PGA_BOTH_PMOS_NMOS; //配置PGA工作状态 PGA_InitStructure.pga1_enable = DISABLE; //PGA1使能 DISABLE ENABLE PGA_InitStructure.pga_chop = PGA_CHOP_DISABLE; //配置PGA 斩波 adc_pga_init(&PGA_InitStructure); adc_vref_soft_start(ADC1); //VREF软启动 vref_config_t vref_InitStructure; vref_InitStructure.buffer_enable = ENABLE; //使能vref buff vref_InitStructure.vref_enable = ENABLE; //使能vref模块 vref_InitStructure.driver = ADC_VREF_DRV_MAX_5MA; //配置VREF驱动电流为5mA vref_InitStructure.ref_select = ADC_REF_SELECT_INNER_2P048V; //配置参考电压 adc_vref_init(&vref_InitStructure); //配置参考电压 adc_chop_freq_set(ADC1,ADC_CHOP_DIV_256); //配置斩波 adc_digital_filter_select(ADC1,ADC_FILTER_SINC3); //配置滤波器种类 adc_trigger_config(ADC1,ADC_TRIGGER_MODE_SOFT,ADC_TRIGGER_SRC_LPTIM);//软件触发 //偏移校准配置 adc_channel_config(ADC1,ADC_INPUT_CHANNEL_12,ADC_INPUT_CHANNEL_12); //配置输入为内短模式 ADC_InitStructure.convert_mode = ADC_SINGLE_CONVERT_MODE; //单次转换模式 ADC_InitStructure.average_num = ADC_AVERAGE_NUM_16; //平均次数4 adc_init(ADC1,&ADC_InitStructure); IADC_Init(); // ADC测试 // while(!adc_software_calibration_set(ADC1,&ADC_InitStructure,&PGA_InitStructure,&vref_InitStructure)); //开始ADC偏移校准 // //恢复测试配置 adc_channel_config(ADC1,ADC_INPUT_CHANNEL_0,ADC_INPUT_CHANNEL_1); //配置输入通道 ADC_InitStructure.average_num = ADC_AVERAGE_NUM_16; //配置平均次数 ADC_InitStructure.convert_mode = ADC_CONTINUE_CONVERT_MODE ; //连续转换模式 adc_init(ADC1,&ADC_InitStructure); /* PGA2_bypass / ADC1->PGA \|= ADC_PGA_PGA2BYP; //PGA2 bypass ADC1->PGA &= ~ADC_PGA_PGA2_EN; //使能PGA2 ADC1->CFG3 \|= ADC_CFG3_CHOPSEL; //斩波位置选择信号0:斩波位于 PGA2和ADC中 1:：斩波位于ADC中，PGA2无斩波 nvic_config_t NVIC_InitStructure; / Enable the ADC1 Interrupt / NVIC_InitStructure.IRQn = IRQn_ADC1; NVIC_InitStructure.priority = 0x1; NVIC_InitStructure.enable_flag = ENABLE; nvic_init(&NVIC_InitStructure); __ADC_INTR_ENABLE(ADC1,ADC_INTR_EOCIE); adc_conversion_start(ADC1); //开始转换赞回复举报 1 个讨论*

0 根据ADC采样原理，差分采样得知，有3种方法，一种是将ADC的单端采样输入引脚和一个不用的ADC输入引脚组成差分对，将组成差分对的那个引脚与GND引脚相连；一种是将ADC的单端采样输入引脚和内部ADC_CHANNEL_12组成差分对进行计算；一种是将ADC的单端采样输入引脚和内部ADC_CHANNEL_14组成差分对进行计算；

2024-7-30 17:10:25 评论举报 1^# 殷永枫