max31865:RTD-to-Digital Converter

[laoniaokkk]

Summary

A digital converter for rtd

Impact

NuttShell (NSH) NuttX-12.2.1
nsh>
nsh> ls /dev
/dev:
console
null
ram0
temp0
ttyS0

Testing

#define MAX31865_PATH "/dev/temp0"

int main(int argc, FAR char *argv[])
{
int ret = 0;
int fd = 0;
float temp = 0.0f;

fd = open(MAX31865_PATH, O_RDONLY);
if (fd < 0)
{
perror("open max31865 fail");
return -1;
}

while (1)
{
sleep(1);
ret = read(fd, (float *)&temp, sizeof(temp));
if (ret < 0)
printf("read max31865 fail: %d\n", ret);
else
printf("temp: %.1f\n", temp);
}

return 0;
}