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application: pin action shows atual floating value

This commit is contained in:
King Kévin 2019-12-09 23:15:23 +01:00
parent 4aec3da96c
commit 2d5a2b7f4f
1 changed files with 5 additions and 32 deletions
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37
application.c
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@ -319,7 +319,7 @@ static void command_pin(void* argument)
// print header
if (!pin_level) {
printf("pin set and state (H: out high, L: out low, h in high, l in low, x in floating):\n");
printf("pin state (H: out high, L: out low, h in high, l in low, x in floating) and actual level (0: low, 1:high):\n");
} else {
printf("setting pin\n");
}
@ -356,36 +356,10 @@ static void command_pin(void* argument)
}
}
// show actual value
if (0 == mode) { // pin is configured as input
bool high = (0 != gpio_get(pin_port, pin_pin)); // test if pin is high
bool low = !high; // will be used to test if pin is low
if (1 == conf) { // pin is in floating configuration
gpio_set_mode(pin_port, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, pin_pin); // we will test if the input is floating by checking against a pull up and down
gpio_set(pin_port, pin_pin); // pull up
sleep_us(10); // wait for GPIO/line to settle
high = (0 != gpio_get(pin_port, pin_pin)); // test if pin is high
gpio_clear(pin_port, pin_pin); // pull down
sleep_us(10); // wait for GPIO/line to settle
low = (0 == gpio_get(pin_port, pin_pin)); // test if pin is low
gpio_set_mode(pin_port, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, pin_pin); // put back to floating
}
// check and display result
if (high && !low) { // pull down did not work
putc('h'); // something is driving the pin high
} else if (!high && low) { // pull up did not work
putc('l'); // something is driving the pin low
} else if (high && low) { // pull up and down worked
putc('x'); // nothing is driving the pin
} else { // pull up and down did not work
putc('?'); // something is driving the pin randomly
}
} else { // pin is configured as output
// only show the actual measured output, not the one set
if (gpio_get(pin_port, pin_pin)) {
putc('H'); // pin is high
} else {
putc('L'); // pin is low
}
if (gpio_get(pin_port, pin_pin)) {
putc('1');
} else {
putc('0');
}
putc('\n');
}
@ -409,7 +383,6 @@ static void command_pin(void* argument)
gpio_set_mode(pin_port, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, pin_pin);
break;
case 'x':
case 'X':
default:
gpio_set_mode(pin_port, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, pin_pin);
}