FastIO_EFM32.h

00001 #if defined(TARGET_EFM32)
00002 
00003 #include "mbed.h"
00004 #include "pinmap.h"
00005 #include "em_cmu.h"
00006 
00007 typedef struct {
00008     uint32_t mask;
00009     uint8_t input_mode;
00010     uint8_t output_mode;
00011 } fastio_vars;
00012 
00013 #define PIN_INDEX       (pin & 0xF)
00014 #define PINMASK         (1 << PIN_INDEX)
00015 #define PORT_INDEX      (pin >> 4)
00016 
00017 //Mode_reg is either high or low, depending on first 8 bit or second 8-bit of a port
00018 #define MODE_REG        (*((&GPIO->P[PORT_INDEX].MODEL) + PIN_INDEX / 8))
00019 #define MODE_SHIFT      ((PIN_INDEX * 4) % 32)
00020 
00021 #define INIT_PIN        this->container.mask = PINMASK; this->container.input_mode = PullDefault; this->container.output_mode = PushPull; CMU_ClockEnable(cmuClock_HFPER, true); CMU_ClockEnable(cmuClock_GPIO, true)
00022 #define DESTROY_PIN     
00023 
00024 #define SET_DIR_INPUT   uint32_t temp = MODE_REG & ~(0xF << MODE_SHIFT); MODE_REG = temp + ((this->container.input_mode & 0xF) << MODE_SHIFT); if (this->container.input_mode > 0x10) WRITE_PIN_SET; else WRITE_PIN_CLR
00025 #define SET_DIR_OUTPUT  uint32_t temp = MODE_REG & ~(0xF << MODE_SHIFT); MODE_REG = temp + (container.output_mode << MODE_SHIFT)
00026 #define SET_MODE(pull)  if ((pull <= 3) || (pull > 0x10)) {this->container.input_mode = pull; SET_DIR_INPUT; } else {this->container.output_mode = pull; SET_DIR_OUTPUT;}
00027 
00028 #define WRITE_PIN_SET   GPIO->P[PORT_INDEX].DOUTSET = PINMASK
00029 #define WRITE_PIN_CLR   GPIO->P[PORT_INDEX].DOUTCLR = PINMASK
00030 
00031 #define READ_PIN        ((GPIO->P[PORT_INDEX].DIN & this->container.mask) ? 1 : 0)
00032 
00033 #endif