ADS1299内部测试信号数据问题

之前买了ADS1299的评估板，我利用MCU（cc2530）板子对ADS1299套件子板供电并实现spi连接，已经成功读出ID。

再进行内部信号测试的时候出现方波不稳（个别点跳跃）的情况（评估板测试方波良好），我检查了一下得到的原始数据发现个别位置出现数据错误（图中蓝线所示部分），请问这是什么原因？应该如何改正呢？

user151383853：

好象没有明确规则的数据发生错误. 

不过我感觉不见得是芯片的采集问题, 也可能软件有缺陷. 数据应该有的, 发生了放置的错位

Yang Zhao6：

回复 user151383853:

感谢你的回复！

感觉应该是我读取数据的问题，以下是我配置管脚、寄存器、读取数据的代码，能请您帮我查看一下吗？

#define SPI_DRDYP1_2
#define CLKSELP1_3
#define SPI_STARTP0_6
#define PWDNP0_5
#define RESETP0_4
int spi_init()
{// SPI Master ModePERCFG |= 0x02;// map USART1 to its alternative 2 location. P1_4: SSN, P1_5: SCK, P1_6: MOSI, P1_7: MISOP1SEL |= 0xE0;// P1_5, P1_6, and P1_7 are peripheralsP1SEL &= ~0x10;// P1_4 is GPIO (SSN)P1DIR |= 0x10;// SSN is set as outputU1BAUD = 0x00; U1GCR |= 0x0D;// BAUD_M=0,BAUD_E=13,Fsck=250kHz.4usU1CSR &= ~0xA0;// SPI Master Mode//U1CSR &= ~0x80; U1CSR |= 0x20;// SPI Slave Mode//U1GCR &= ~0xC0; U1GCR |= 0x20;// MSBU1GCR = 0x6D;//IO_FUNC_PORT_PIN(1, 4, IO_FUNC_GIO);IO_FUNC_PORT_PIN(1, 2, IO_FUNC_GIO);IO_DIR_PORT_PIN(1, 2, IO_IN);IO_FUNC_PORT_PIN(1, 3, IO_FUNC_GIO);IO_DIR_PORT_PIN(1, 3, IO_IN);IO_FUNC_PORT_PIN(0, 6, IO_FUNC_GIO);IO_DIR_PORT_PIN(0, 6, IO_IN);IO_DIR_PORT_PIN(1, 4, IO_OUT);IO_DIR_PORT_PIN(1, 5, IO_IN);IO_DIR_PORT_PIN(1, 6, IO_OUT);IO_DIR_PORT_PIN(1, 7, IO_IN);IO_FUNC_PORT_PIN(1, 1, IO_FUNC_GIO);//IO_DIR_PORT_PIN(1, 1, IO_OUT);//IO_FUNC_PORT_PIN(1, 0, IO_FUNC_GIO);IO_DIR_PORT_PIN(1, 0, IO_OUT);return 0;
}
void main()
{chartemp[3];unsigned charout[27];uint32 uartout[200];CLKCONCMD = 0x80; while (CLKCONSTA != 0x80);// 32MHzInitUart();spi_init();LED1 = 1;P1_3 = 1;//CLKSET = 1halMcuWaitUs(1000);P0_5 = 1;//PWDN = 1P0_4 = 1;//RESET pin =1//while(1){P1_4 = 0;//SSN = 0;halMcuWaitUs(16);WriteData(0x06);//RESEThalMcuWaitUs(36);P1_4 = 1;halMcuWaitUs(16);P1_4 = 0;halMcuWaitUs(16);WriteData(0x11);//SDATAChalMcuWaitUs(16);P1_4 = 1;halMcuWaitUs(16);P1_4 = 0;halMcuWaitUs(16);WriteData(0x43);//WREG and from 0x03h addresshalMcuWaitUs(32);WriteData(0x00);//only CONFOG3halMcuWaitUs(32);WriteData(0xE0);halMcuWaitUs(32);P1_4 = 1;halMcuWaitUs(16);P1_4 = 0;halMcuWaitUs(16);WriteData(0x42);//WREG and from 0x02h addresshalMcuWaitUs(32);WriteData(0x00);//only CONFOG2halMcuWaitUs(32);WriteData(0xD0);halMcuWaitUs(32);P1_4 = 1;halMcuWaitUs(16);P1_4 = 0;halMcuWaitUs(16);WriteData(0x45);//WREG and from 0x05h addresshalMcuWaitUs(32);WriteData(0x07);//eight channels | CHnSEThalMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);WriteData(0x05);halMcuWaitUs(32);P1_4 = 1;halMcuWaitUs(16);//P0_6 = 1;//START=1//halMcuWaitUs(4);P1_4 = 0;halMcuWaitUs(16);WriteData(0x10);//Come back to RDATAC Mode//halMcuWaitUs(16);P1_4 = 1;P0_6 = 1;//START=1while(1){if(P1_2 == 0){for(int i=0;i<27;i++){//for(int j=0;i<3;j++){P1_4 = 0;U1DBUF = 0x00;while(!U1TX_BYTE);//temp[j] = U1DBUF;out[i] = U1DBUF;P1_4 = 1;U1TX_BYTE = 0;//}//out[i] = temp[0]+temp[1]+temp[2];//uartout[i]=hexStr2Str(out);//sprintf(uartout[i],"%6X",out);}//out[27] = 0xFF;UartSendString(out,27);halMcuWaitMs(100);}}}

Li Chao Li：

你的ADS1299的ID在初始化的时候设置的是多少啊？