Hi,
I have successfully installed the driver and GUI software. I can see Hardware connected is showing but default register setting in not appearing. I am using default jumper setting and S1 -5V.
Kindly help me to solve this.
Thanks,
Ravi Kumar
Hi Bob,
Thanks for reply soon and valuable information. I can only see the ADC channel 0 information in Data Analysis tool. The EVM board has input pin AIN9- AIN0, So as per my understanding it should display 9 ADC channel. I am connecting input 2.5 volt to pin AIN7 of EVM. Suggest me how can i see the ADC value and let me know if software can convert ADC output in voltage form also ?
Hi Bob,
Thanks for reply soon and valuable information. I can only see the ADC channel 0 information in Data Analysis tool. The EVM board has input pin AIN9- AIN0, So as per my understanding it should display 9 ADC channel. I am connecting input 2.5 volt to pin AIN7 of EVM. Suggest me how can i see the ADC value and let me know if software can convert ADC output in voltage form also ?
Hi Bob,
I have below observation with imx8mm controller and ADS1261 EVM board.
Case 1: I have configured SPI clock at 5MHZ and mode 1 and testing with short MISO and MOSI Line of master as you can see the below image.
Case 2: I am connecting ADS1261 pin to master(IMX8mm) SPI pin and trying to read the command from ADS1261 and getting expected data from ADS1261. Note in this case i have not connected MOSI line of ADS1261 to MISO line of Master.
case 3 : I am connecting ADS1261 pin to master(IMX8mm) SPI pin and trying to read the command from ADS1261 and getting some glitches and unable to read right data . Note in this case i have connected MOSI line of ADS1261 to MISO line of Master.
Below are my sample application.
static const char *device = "/dev/spidev0.0";
static uint32_t mode =( SPI_MODE_1 ) ;
static uint8_t bits = 8;
static uint8_t lsb ;
static uint32_t speed = 5000000;
static uint16_t delay;
static void pabort(const char *s)
{
if (errno != 0)
perror(s);
else
printf("%s\n", s);
abort();
}
static void do_msg(int fd, int len)
{
struct spi_ioc_transfer xfer[2];
unsigned char buf[32], *bp;
int status;
memset(xfer, 0, sizeof xfer);
memset(buf, 0, sizeof buf);
if (len > sizeof buf)
len = sizeof buf;
buf[0] = 0x06;
buf[1] = 0x00;
xfer[0].tx_buf = (unsigned long)buf;
xfer[0].len = 2;
xfer[1].rx_buf = (unsigned long) buf;
xfer[1].len = 2;
status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
if (status < 0) {
perror("SPI_IOC_MESSAGE");
return;
}
printf("response(%2d, %2d): ", len, status);
for (bp = buf; len; len--)
printf(" %02x", *bp++);
printf("\n");
}
static void dumpstat(const char *name, int fd)
{
int ret = 0;
/*
* spi mode
*/
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
if (ret == -1)
pabort("can't get spi mode");
if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
perror("SPI rd_lsb_fist");
return;
}
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't get bits per word");
/*
* max speed hz
*/
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
printf("spi mode: 0x%x\n", mode);
printf("bits per word: %u\n", bits);
printf("max speed: %u Hz (%u kHz)\n", speed, speed/1000);
}
int main(int argc, char **argv)
{
int c;
int msglen = 2;
int fd;
fd = open(device, O_RDWR);
if (fd < 0) {
perror("open");
return 1;
}
dumpstat(device, fd);
do_msg(fd, msglen);
close(fd);
return 0;
}
I am not sure why this glitches are coming when i am connecting MISO line of master. But whenever i am trying to read loopback MISO and MOSI line ,it's showing right data.
Regards,
Ravi Kumar
