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gex-core/platform/pin_utils.c

91 lines
1.9 KiB

7 years ago
//
// Created by MightyPork on 2017/11/26.
//
#include "pin_utils.h"
#define PINS_COUNT 16
/** Pin number to LL bitfield mapping */
static const uint32_t ll_pins[PINS_COUNT] = {
LL_GPIO_PIN_0,
LL_GPIO_PIN_1,
LL_GPIO_PIN_2,
LL_GPIO_PIN_3,
LL_GPIO_PIN_4,
LL_GPIO_PIN_5,
LL_GPIO_PIN_6,
LL_GPIO_PIN_7,
LL_GPIO_PIN_8,
LL_GPIO_PIN_9,
LL_GPIO_PIN_10,
LL_GPIO_PIN_11,
LL_GPIO_PIN_12,
LL_GPIO_PIN_13,
LL_GPIO_PIN_14,
LL_GPIO_PIN_15,
};
/** Port number (A=0) to config struct pointer mapping */
static GPIO_TypeDef * const port_periphs[PORTS_COUNT] = {
GPIOA,
GPIOB,
GPIOC,
GPIOD,
GPIOE,
};
/** Convert pin number to LL bitfield */
uint32_t plat_pin2ll(uint8_t pin_number, bool *suc)
{
assert_param(suc != NULL);
if(pin_number >= PINS_COUNT) {
dbg("Bad pin: %d", pin_number);
// TODO proper report
*suc = false;
return 0;
}
return ll_pins[pin_number];
}
/** Convert port name (A,B,C...) to peripheral struct pointer */
GPIO_TypeDef *plat_port2periph(char port_name, bool *suc)
{
assert_param(suc != NULL);
if(port_name < 'A' || port_name >= ('A'+PORTS_COUNT)) {
dbg("Bad port: %c", port_name);
// TODO proper report
*suc = false;
return NULL;
}
uint8_t num = (uint8_t) (port_name - 'A');
return port_periphs[num];
}
/** Convert a pin to resource handle */
Resource plat_pin2resource(char port_name, uint8_t pin_number, bool *suc)
{
assert_param(suc != NULL);
if(port_name < 'A' || port_name >= ('A'+PORTS_COUNT)) {
dbg("Bad port: %c", port_name);
// TODO proper report
*suc = false;
return R_NONE;
}
if(pin_number >= PINS_COUNT) {
// TODO proper report
dbg("Bad pin: %d", pin_number);
*suc = false;
return R_NONE;
}
uint8_t num = (uint8_t) (port_name - 'A');
return R_PA0 + num*16 + pin_number;
}