请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。
器件型号：ADS1292 您好！
我正在尝试将 ADS1292与 PSoC 连接、但我无法读取寄存器值(即使 ID 寄存器返回0x00)。
请注意、ADS 在默认配置下工作。 我们在多个 ADS1292芯片上面临这一问题。
以下是我在调试时遵循的步骤：
1.数据表中提到的上电顺序。
2.如 TI 论坛中其他几个问题中所述、增加了延迟。
3.已检查 VCAP1、VCAP2和 Vref 的值。
4.探测 MISO/CS/CSLK/DRDY 线路并在示波器上进行检查。
这是我使用的代码：
初始化
//Defines for Commands. #define WakeUpCmd 0x02 #define StandByCmd 0x04 #define ResetCmd 0x06 #define StartCmd 0x08 #define StopCmd 0x0A #define SDATACCmd 0x11 #define RDATACmd 0x12 #define ReadRegCmd 0x20 #define WriteRegCmd 0x40 // Defines for Register Addresses. #define ID_Addr 0x00 #define CONFIG1_Addr 0x01 #define CONFIG2_Addr 0x02 #define CH1SET_Addr 0x04 #define CH2SET_Addr 0x05 #define RLDSENS_Addr 0x06 #define RESP1 0x09 #define RESP2 0x0A
ADS 配置的功能
void my_ads_config(void)
{
uint8 temp;
/*Power UP Sequence*/
Pin_MISO_Write(0);
Pin_MOSI_Write(1);
Pin_SCLK_Write(0);
Pin_DRDY_Write(1);
Pin_SS_Write(1);
Pin_PWDN_Write(0);
Pin_Start_Write(0);
/*Wait for Tpor=1s*/
CyDelay(1000);
/*Set CLK=1*/
Pin_SCLK_Write(1);
/*Wait for Tpor=1s*/
CyDelay(1000);
/*RESET PULSE*/
Pin_PWDN_Write(1);
CyDelay(1000);
Pin_PWDN_Write(0);
CyDelay(1000);
Pin_PWDN_Write(1);
CyDelay(100);
/*Reset communication*/
Pin_SS_Write(0);
CyDelay(1000);
Pin_SS_Write(1);
CyDelay(500);
/* stop read data continous mode */
SendCommand(SDATACCmd);
CyDelay(10);
/*Read ID register*/
temp = ReadRegister(0x00);
/* using internal buffer*/
WriteRegister(CONFIG2_Addr, 0xA0);
CyDelayUs(10);
temp = ReadRegister(0x02);
SendCommand(StartCmd);
}
2.读取寄存器的函数
uint8 ReadRegister (uint8_t ui8RegAddress)
{
uint8_t tx_buf [3];
uint8_t rx_buf[3];
const uint8_t PACKET_SIZE = 3;
Pin_SS_Write(0);
/* Send write register command appended with the register address. */
tx_buf[0] = ReadRegCmd | ui8RegAddress;
CyDelayUs(5);
tx_buf[1] = 0;
CyDelayUs(5);
tx_buf[2] = 0;
CyDelayUs(5);
/* start transfer */
SPIM_ads_SpiUartPutArray(tx_buf, PACKET_SIZE);
/* wait for the end of the transfer */
while(PACKET_SIZE != SPIM_ads_SpiUartGetRxBufferSize());
Pin_SS_Write(1);
/* read RX buffer */
rx_buf[0] = (uint8) SPIM_ads_SpiUartReadRxData();
rx_buf[1] = (uint8) SPIM_ads_SpiUartReadRxData();
rx_buf[2] = (uint8) SPIM_ads_SpiUartReadRxData();
/* clear dummy bytes from RX buffer */
SPIM_ads_SpiUartClearRxBuffer();
/* return the register content */
return(rx_buf[2]);
}
3.写入寄存器的函数
void WriteRegister (uint8_t ui8RegAddress, uint8_t ui8RegData)
{
uint8_t tx_buf [3];
const uint8_t PACKET_SIZE = 3;
/* Send write register command appended with the register address. */
tx_buf[0] = WriteRegCmd | ui8RegAddress;
CyDelayUs(5);
tx_buf[1] = 0;
CyDelayUs(5);
tx_buf[2] = ui8RegData;
CyDelayUs(5);
/* start transfer */
SPIM_ads_SpiUartPutArray(tx_buf, PACKET_SIZE);
/* wait for the end of the transfer */
while(PACKET_SIZE != SPIM_ads_SpiUartGetRxBufferSize());
/* clear dummy bytes from RX buffer */
SPIM_ads_SpiUartClearRxBuffer();
}
