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Add functions for direct IO register access

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This commit is contained in:
Ivan Grokhotkov 2015-01-26 02:08:26 +03:00
parent fba488ac6d
commit 811031cbd6
2 changed files with 31 additions and 3 deletions
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8
cores/esp8266/Arduino.h
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@ -137,10 +137,12 @@ void loop(void);
// Get the bit location within the hardware port of the given virtual pin. // Get the bit location within the hardware port of the given virtual pin.
// This comes from the pins_*.c file for the active board configuration. // This comes from the pins_*.c file for the active board configuration.
uint32_t digitalPinToPort(uint32_t pin);
uint32_t digitalPinToBitMask(uint32_t pin);
#define analogInPinToBit(P) (P) #define analogInPinToBit(P) (P)
volatile uint32_t* portOutputRegister(uint32_t port);
// On the ATmega1280, the addresses of some of the port registers are volatile uint32_t* portInputRegister(uint32_t port);
// greater than 255, so we can't store them in uint8_t's. volatile uint32_t* portModeRegister(uint32_t port);
#define NOT_A_PIN 0 #define NOT_A_PIN 0

26
cores/esp8266/core_esp8266_wiring_digital.c
View File

@ -67,6 +67,32 @@ static const uint32_t g_pin_funcs[PINCOUNT] = {
}; };
uint32_t digitalPinToPort(uint32_t pin)
{
return 0;
}
uint32_t digitalPinToBitMask(uint32_t pin)
{
return 1 << pin;
}
volatile uint32_t* portOutputRegister(uint32_t port)
{
return (volatile uint32_t*) (PERIPHS_GPIO_BASEADDR + GPIO_OUT_ADDRESS);
}
volatile uint32_t* portInputRegister(uint32_t port)
{
return (volatile uint32_t*) (PERIPHS_GPIO_BASEADDR + GPIO_IN_ADDRESS);
}
volatile uint32_t* portModeRegister(uint32_t port)
{
return (volatile uint32_t*) (PERIPHS_GPIO_BASEADDR + GPIO_ENABLE_ADDRESS);
}
enum PinFunction { GPIO, PWM }; enum PinFunction { GPIO, PWM };
static uint32_t g_gpio_function[PINCOUNT] = { static uint32_t g_gpio_function[PINCOUNT] = {
GPIO GPIO