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Expose gpio_set_drive_capability API to Lua (#3099)

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tomsci 2020-05-18 18:56:43 +01:00 committed by GitHub
parent 189fe9646f
commit b8e8ffa53a
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2 changed files with 42 additions and 0 deletions
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18
components/modules/gpio.c
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@ -211,6 +211,17 @@ static int lgpio_write (lua_State *L)
} }
// Lua: gpio.set_drive(gpio, gpio.DRIVE_x)
static int lgpio_set_drive (lua_State *L)
{
int gpio = luaL_checkint (L, 1);
int strength = luaL_checkint (L, 2);
luaL_argcheck (L, strength >= GPIO_DRIVE_CAP_0 && strength < GPIO_DRIVE_CAP_MAX,
2, "pad strength must be between gpio.DRIVE_0 and gpio.DRIVE_3");
check_err (L, gpio_set_drive_capability(gpio, (gpio_drive_cap_t)strength));
return 0;
}
static void nodemcu_gpio_callback_task (task_param_t param, task_prio_t prio) static void nodemcu_gpio_callback_task (task_param_t param, task_prio_t prio)
{ {
@ -245,6 +256,7 @@ LROT_BEGIN(lgpio)
LROT_FUNCENTRY( trig, lgpio_trig ) LROT_FUNCENTRY( trig, lgpio_trig )
LROT_FUNCENTRY( wakeup, lgpio_wakeup ) LROT_FUNCENTRY( wakeup, lgpio_wakeup )
LROT_FUNCENTRY( write, lgpio_write ) LROT_FUNCENTRY( write, lgpio_write )
LROT_FUNCENTRY( set_drive, lgpio_set_drive )
LROT_NUMENTRY ( OUT, GPIO_MODE_OUTPUT ) LROT_NUMENTRY ( OUT, GPIO_MODE_OUTPUT )
@ -262,6 +274,12 @@ LROT_BEGIN(lgpio)
LROT_NUMENTRY ( INTR_UP_DOWN, GPIO_INTR_ANYEDGE ) LROT_NUMENTRY ( INTR_UP_DOWN, GPIO_INTR_ANYEDGE )
LROT_NUMENTRY ( INTR_LOW, GPIO_INTR_LOW_LEVEL ) LROT_NUMENTRY ( INTR_LOW, GPIO_INTR_LOW_LEVEL )
LROT_NUMENTRY ( INTR_HIGH, GPIO_INTR_HIGH_LEVEL ) LROT_NUMENTRY ( INTR_HIGH, GPIO_INTR_HIGH_LEVEL )
LROT_NUMENTRY ( DRIVE_0, GPIO_DRIVE_CAP_0 )
LROT_NUMENTRY ( DRIVE_1, GPIO_DRIVE_CAP_1 )
LROT_NUMENTRY ( DRIVE_2, GPIO_DRIVE_CAP_2 )
LROT_NUMENTRY ( DRIVE_DEFAULT,GPIO_DRIVE_CAP_DEFAULT )
LROT_NUMENTRY ( DRIVE_3, GPIO_DRIVE_CAP_3 )
LROT_END(lgpio, NULL, 0) LROT_END(lgpio, NULL, 0)
NODEMCU_MODULE(GPIO, "gpio", lgpio, nodemcu_gpio_init); NODEMCU_MODULE(GPIO, "gpio", lgpio, nodemcu_gpio_init);

24
docs/modules/gpio.md
View File

@ -63,6 +63,30 @@ Read digital GPIO pin value.
0 = low, 1 = high 0 = low, 1 = high
## gpio.set_drive()
Set the drive strength of a given GPIO pin. The higher the drive strength, the more current can be sourced/sunk from the pin. The exact maximum depends on the power domain of the pin and how much current other pins in that domain are consuming.
#### Syntax
`gpio.set_drive(pin, strength)`
#### Parameters
- `pin`, a valid GPIO pin number.
- `strength` the drive strength to set, one of
- `gpio.DRIVE_0` weakest drive strength
- `gpio.DRIVE_1` stronger drive strength
- `gpio.DRIVE_2` default drive strength
- `gpio.DRIVE_DEFAULT` default drive strength (same as `DRIVE_2`)
- `gpio.DRIVE_3` maximum drive strength
#### Returns
`nil`
#### Example
```lua
gpio.set_drive(4, gpio.DRIVE_3)
```
## gpio.trig() ## gpio.trig()
Establish or clear a callback function to run on interrupt for a GPIO. Establish or clear a callback function to run on interrupt for a GPIO.