[参考译文] LP-MSPM0G3507：寄存器级

你好 Ruben！

感谢您联系我们！

您目前在使用 ADC 时遇到了什么问题？

马修

未获取数据、不确定是否设置正确

#include "ti/devices/msp/m0p/mspm0g350x.h"
#include "ti/driverlib/dl_adc12.h"
#include "ti/driverlib/dl_common.h" // For DL_Common_delayCycles function
#include "ti_msp_dl_config.h"
#include "IndexMacros.h"
#include "stdio.h"
uint16_t threshold = 1;//16384 / 2; // VCC/2 or 1.15V
int i=0;
//data = (V * 4095) / 3.3V
int main (void)
{
  //IOMUX->SECCFG.PINCM[58] = Ox00040081;

  ADC0->ULLMEM.GPRCM.RSTCTL = 0xB1000003; // reset
  ADC0->ULLMEM.GPRCM.PWREN = 0x26000001;  // activate
  DL_Common_delayCycles(24);              // wait

  ADC0->ULLMEM.GPRCM.CLKCFG = 0xA9000000; // ULPCLK
  ADC0->ULLMEM.CLKFREQ = 7;               // 40-48 MHz
  ADC0->ULLMEM.CTL0 = 0x03010000;         // divide by 8
  ADC0->ULLMEM.CTL1 = 0x00000000;         // mode
  ADC0->ULLMEM.CTL2 = 0x00000000;         // MEMRES
  ADC0->ULLMEM.MEMCTL[0] = 1;             // channel 1 is PA26
  ADC0->ULLMEM.SCOMP0 = 0;                // 8 sample clocks
  //ADC0->ULLMEM.CPU_INT.IMASK = 0;         // no interrupt

   ADC0->ULLMEM.CTL0 |= 0x00000001;             //  enable conversions
   ADC0->ULLMEM.CTL1 |= 0x00000100;             //  start ADC
   uint32_t volatile delay=ADC0->ULLMEM.STATUS; //  time to let ADC start

NVIC->IP[1] = 1<<4; // ADC0 is IRQ 4
NVIC->ISER[0] = 1<<4; 
NVIC->IP [1] = (NVIC->IP [1] & (~0xFF000000)) | (2<<6) ;  
__enable_irq();

  while(1)
  {
  // printf("waiting\n");
  __WFI();
  }
         
}
void ADC0_IRQHandler(void)
{
    uint16_t adcRaw = ADC0->ULLMEM.MEMRES[0];

    if (adcRaw > threshold) // Vcc/2 -> 3.04/2
    {
      i=i+1;
      printf("%d \n", i);
    }

}

如果有人能帮忙、任何意见都将令人惊叹

您仍然活跃？

我尚未解码这些位(它们确实都有 CMSIS 名称)、但要缩小范围：

您如何判断您没有获得数据？ (ISR 中的断点？ MEMRES== 0？ 故障？) 什么元件连接到 ADC 输入？

我有一个简单的红外传感器、如果我的手指通过它、就会触发

你怎么知道你没有得到数据?

尊敬的 Ruben：

建议您通过导入 SDK 示例并通过 SysConfig 进行配置来配置 ADC、SysConfig 是一款用于生成代码的图形工具。 如果要构建寄存器级工程、只需按照生成的代码操作、然后将寄存器级代码复制到工程中。

至于附加的 ADC 代码、您是否启用了 ADC 中断？ 例如

示波器  

从未尝试过这种方法、因为在 msp432中我们也没有这样做  

需要为 MSPM0启用中断。 请参阅 MSPM0示例的 ADC 初始过程  ADC12_SEQUENCE_CONVERSION

    DL_ADC12_setClockConfig(ADC12_0_INST, (DL_ADC12_ClockConfig *) &gADC12_0ClockConfig);

    DL_ADC12_initSeqSample(ADC12_0_INST,
        DL_ADC12_REPEAT_MODE_DISABLED, DL_ADC12_SAMPLING_SOURCE_AUTO, DL_ADC12_TRIG_SRC_SOFTWARE,
        DL_ADC12_SEQ_START_ADDR_00, DL_ADC12_SEQ_END_ADDR_03, DL_ADC12_SAMP_CONV_RES_12_BIT,
        DL_ADC12_SAMP_CONV_DATA_FORMAT_UNSIGNED);
    DL_ADC12_configConversionMem(ADC12_0_INST, ADC12_0_ADCMEM_0,
        DL_ADC12_INPUT_CHAN_2, DL_ADC12_REFERENCE_VOLTAGE_VDDA, DL_ADC12_SAMPLE_TIMER_SOURCE_SCOMP0, DL_ADC12_AVERAGING_MODE_DISABLED,
        DL_ADC12_BURN_OUT_SOURCE_DISABLED, DL_ADC12_TRIGGER_MODE_AUTO_NEXT, DL_ADC12_WINDOWS_COMP_MODE_DISABLED);
    DL_ADC12_configConversionMem(ADC12_0_INST, ADC12_0_ADCMEM_1,
        DL_ADC12_INPUT_CHAN_0, DL_ADC12_REFERENCE_VOLTAGE_VDDA, DL_ADC12_SAMPLE_TIMER_SOURCE_SCOMP0, DL_ADC12_AVERAGING_MODE_DISABLED,
        DL_ADC12_BURN_OUT_SOURCE_DISABLED, DL_ADC12_TRIGGER_MODE_AUTO_NEXT, DL_ADC12_WINDOWS_COMP_MODE_DISABLED);
    DL_ADC12_configConversionMem(ADC12_0_INST, ADC12_0_ADCMEM_2,
        DL_ADC12_INPUT_CHAN_7, DL_ADC12_REFERENCE_VOLTAGE_VDDA, DL_ADC12_SAMPLE_TIMER_SOURCE_SCOMP0, DL_ADC12_AVERAGING_MODE_DISABLED,
        DL_ADC12_BURN_OUT_SOURCE_DISABLED, DL_ADC12_TRIGGER_MODE_AUTO_NEXT, DL_ADC12_WINDOWS_COMP_MODE_DISABLED);
    DL_ADC12_configConversionMem(ADC12_0_INST, ADC12_0_ADCMEM_3,
        DL_ADC12_INPUT_CHAN_3, DL_ADC12_REFERENCE_VOLTAGE_VDDA, DL_ADC12_SAMPLE_TIMER_SOURCE_SCOMP0, DL_ADC12_AVERAGING_MODE_DISABLED,
        DL_ADC12_BURN_OUT_SOURCE_DISABLED, DL_ADC12_TRIGGER_MODE_AUTO_NEXT, DL_ADC12_WINDOWS_COMP_MODE_DISABLED);
    DL_ADC12_setPowerDownMode(ADC12_0_INST,DL_ADC12_POWER_DOWN_MODE_MANUAL);
    DL_ADC12_setSampleTime0(ADC12_0_INST,160);
    /* Enable ADC12 interrupt */
    DL_ADC12_clearInterruptStatus(ADC12_0_INST,(DL_ADC12_INTERRUPT_MEM3_RESULT_LOADED));
    DL_ADC12_enableInterrupt(ADC12_0_INST,(DL_ADC12_INTERRUPT_MEM3_RESULT_LOADED));
    DL_ADC12_enableConversions(ADC12_0_INST);

在这种情况下、将启用 ADC 结果加载中断、 以便在加载 ADC 结果时可以输入 ADC 中断处理程序。