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Add hardware_gpio accessors for Schmitt, slew rate, drive strength (fixes #290) (#464)

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This commit is contained in:
Luke Wren
2021-06-01 20:25:11 +01:00
committed by GitHub
parent d026118499
commit 30041d8513
4 changed files with 180 additions and 1 deletions
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27
src/host/hardware_gpio/gpio.c
View File

@ -39,6 +39,31 @@ void gpio_set_oeover(uint gpio, uint value) {
}
void gpio_set_input_hysteresis_enabled(uint gpio, bool enabled){
}
bool gpio_is_input_hysteresis_enabled(uint gpio){
return true;
}
void gpio_set_slew_rate(uint gpio, enum gpio_slew_rate slew){
}
enum gpio_slew_rate gpio_get_slew_rate(uint gpio){
return GPIO_SLEW_RATE_FAST;
}
void gpio_set_drive_strength(uint gpio, enum gpio_drive_strength drive){
}
enum gpio_drive_strength gpio_get_drive_strength(uint gpio){
return GPIO_DRIVE_STRENGTH_4MA;
}
void gpio_set_irq_enabled(uint gpio, uint32_t events, bool enable) {
}
@ -115,4 +140,4 @@ void gpio_set_input_enabled(uint gpio, bool enable) {
void gpio_init_mask(uint gpio_mask) {
}
}

23
src/host/hardware_gpio/include/hardware/gpio.h
View File

@ -27,6 +27,17 @@ enum gpio_function {
GPIO_FUNC_NULL = 0xf,
};
enum gpio_slew_rate {
GPIO_SLEW_RATE_SLOW = 0, ///< Slew rate limiting enabled
GPIO_SLEW_RATE_FAST = 1 ///< Slew rate limiting disabled
};
enum gpio_drive_strength {
GPIO_DRIVE_STRENGTH_2MA = 0, ///< 2 mA nominal drive strength
GPIO_DRIVE_STRENGTH_4MA = 1, ///< 4 mA nominal drive strength
GPIO_DRIVE_STRENGTH_8MA = 2, ///< 8 mA nominal drive strength
GPIO_DRIVE_STRENGTH_12MA = 3 ///< 12 mA nominal drive strength
};
#define GPIO_OUT 1
#define GPIO_IN 0
@ -58,6 +69,18 @@ void gpio_set_oeover(uint gpio, uint value);
void gpio_set_input_enabled(uint gpio, bool enable);
void gpio_set_input_hysteresis_enabled(uint gpio, bool enabled);
bool gpio_is_input_hysteresis_enabled(uint gpio);
void gpio_set_slew_rate(uint gpio, enum gpio_slew_rate slew);
enum gpio_slew_rate gpio_get_slew_rate(uint gpio);
void gpio_set_drive_strength(uint gpio, enum gpio_drive_strength drive);
enum gpio_drive_strength gpio_get_drive_strength(uint gpio);
// Configure a GPIO for direct input/output from software
void gpio_init(uint gpio);