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show noise levels in ADC test

This commit is contained in:
Andrew Tridgell 2011-09-15 23:06:21 +10:00
parent 2ae78e197e
commit 4a7c9c406f
1 changed files with 35 additions and 24 deletions
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39
libraries/AP_ADC/examples/AP_ADC_test/AP_ADC_test.pde
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@ -23,30 +23,41 @@ void setup()
} }
static const uint8_t channel_map[6] = { 1, 2, 0, 4, 5, 6}; static const uint8_t channel_map[6] = { 1, 2, 0, 4, 5, 6};
static uint16_t sin_count;
float v; float v;
uint32_t last_usec = 0; uint32_t last_usec = 0;
void loop() void loop()
{ {
v = sin(millis());
sin_count++;
if ((millis() - timer) > 200) {
uint16_t result[6]; uint16_t result[6];
uint32_t deltat; uint32_t deltat = 0;
uint16_t ch3; uint16_t ch3;
uint16_t min[6], max[6];
uint8_t i;
for (i=0;i<6;i++) {
min[i] = 0xFFFF;
max[i] = 0;
}
do {
ch3 = adc.Ch(3);
deltat += adc.Ch6(channel_map, result);
for (i=0;i<6;i++) {
if (result[i] < min[i]) min[i] = result[i];
if (result[i] > max[i]) max[i] = result[i];
if (result[i] & 0x8000) {
Serial.printf("result[%u]=0x%04x\n", (unsigned)i, result[i]);
}
}
} while ((millis() - timer) < 200);
timer = millis(); timer = millis();
Serial.printf("g=(%u,%u,%u) a=(%u,%u,%u) +/-(%u,%u,%u,%u,%u,%u) gt=%u dt=%u\n",
ch3 = adc.Ch(3);
deltat = adc.Ch6(channel_map, result);
Serial.printf("gx=%u gy=%u gz=%u ax=%u ay=%u az=%u gt=%u deltat=%lu sin_count=%u\n",
result[0], result[1], result[2], result[0], result[1], result[2],
result[3], result[4], result[5], result[3], result[4], result[5],
ch3, deltat, sin_count); (max[0]-min[0]), (max[1]-min[1]), (max[2]-min[2]),
sin_count = 0; (max[3]-min[3]), (max[4]-min[4]), (max[5]-min[5]),
} ch3, (unsigned)(deltat/1000));
} }