我现在面临的问题是,一个SPI读取8个ADS1118、ADS1118接两路差分,我单独读取每个ads1118的第一路A0P1,数据都是稳定正常的。等下次切片选读第二路,数据就有问题了。还有就是单独去读取每个ADS1118第二路也是稳定的,就是一起读了两路才有错误、
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);//ê1Äüspi¶Ë¿ú¸′óÃclock
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA, GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;//add comment£oSPI12¨ìØÂê=36MHz/SPI_BaudRatePrescaler_32
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
寄存器配置confval = CMD_MUX_MODE_P2_N3 | CMD_PGA_MODE_0_256 | CMD_CONTINUOUS_SAMPLE_MODE
| CMD_SAMPLE_RATE_860SPS | CMD_ADC_MODE | CMD_PULL_UP_EN
| CMD_UPDATE_CONF_REGISTER | CMD_RESERVE_BIT;
confval = CMD_MUX_MODE_P2_N3 | CMD_PGA_MODE_0_256 | CMD_CONTINUOUS_SAMPLE_MODE
| CMD_SAMPLE_RATE_860SPS | CMD_TSENSOR_MODE | CMD_PULL_UP_EN
| CMD_UPDATE_CONF_REGISTER | CMD_RESERVE_BIT;
求大神给个方案呀。。