/**
* \brief Disable SPI and change to GPIO
*/
void epd_spi_detach (void) {
spi_disable(EPD_SPI_ID);
ioport_enable_pin(EPD_SPI_CLK_PIN);
ioport_enable_pin(EPD_SPI_MOSI_PIN);
ioport_enable_pin(EPD_SPI_MISO_PIN);
config_gpio_dir_o(EPD_SPI_CLK_PIN);
config_gpio_dir_o(EPD_SPI_MOSI_PIN);
config_gpio_dir_o(EPD_SPI_MISO_PIN);
set_gpio_low(EPD_SPI_CLK_PIN);
set_gpio_low(EPD_SPI_MOSI_PIN);
set_gpio_low(EPD_SPI_MISO_PIN);
}
int I2C_init( void ) {
twi_options_t opt;
twi_slave_fct_t twi_slave_fct;
int status;
double total = 0;
// Initialize and enable interrupt
irq_initialize_vectors();
cpu_irq_enable();
// TWI gpio pins configuration
gpio_enable_module(TWI_GPIO_MAP, sizeof(TWI_GPIO_MAP) / sizeof(TWI_GPIO_MAP[0]));
// initialize the interrupt flag for alerting the Pi of new data (TWI = Three Wire Interface for us)
ioport_enable_pin(I2C_FLAG);
ioport_set_pin_dir(I2C_FLAG,IOPORT_DIR_OUTPUT);
ioport_set_pin_level(I2C_FLAG,false);
// options settings
opt.pba_hz = FOSC0;
opt.speed = TWI_SPEED;
opt.chip = EEPROM_ADDRESS;
// initialize TWI driver with options
twi_slave_fct.rx = &twi_slave_rx;
twi_slave_fct.tx = &twi_slave_tx;
twi_slave_fct.stop = &twi_slave_stop;
status = twi_slave_init(&AVR32_TWI, &opt, &twi_slave_fct );
return (&s_memory[0] );
}
void init_gpio_pins(void)
{
ioport_enable_pin(LED_1);
ioport_enable_pin(LED_2);
ioport_enable_pin(LED_3);
ioport_enable_pin(HM_10_RESET);
ioport_enable_pin(HM_10_DD);
ioport_enable_pin(HM_10_DC);
ioport_enable_pin(HM_10_MSG);
ioport_set_pin_dir(LED_1, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LED_2, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LED_3, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(HM_10_RESET, IOPORT_DIR_INPUT);
ioport_set_pin_dir(HM_10_DD, IOPORT_DIR_INPUT);
ioport_set_pin_dir(HM_10_DC, IOPORT_DIR_INPUT);
ioport_set_pin_dir(HM_10_MSG, IOPORT_DIR_INPUT);
ioport_set_pin_level(LED_1, false);
ioport_set_pin_level(LED_2, false);
ioport_set_pin_level(LED_3, false); // LED's on
/*ioport_set_pin_level(HM_10_DD, false); // DC,DD low
ioport_set_pin_level(HM_10_DC, false);
ioport_set_pin_level(HM_10_RESET, false); // HM-10 in reset (reset low)*/
}
static void _dbg_usart_pins_init(void)
{
#ifdef DBG_USART_PIN_EN
ioport_set_pin_dir(DBG_USART_PIN_EN, IOPORT_DIR_OUTPUT);
ioport_enable_pin(DBG_USART_PIN_EN);
ioport_set_pin_level(DBG_USART_PIN_EN, DBG_USART_PIN_EN_LEVEL);
#endif
#if defined(DBG_USART_PIN_TX)
ioport_set_pin_mode(DBG_USART_PIN_TX, DBG_USART_PIN_TX_MUX);
ioport_disable_pin(DBG_USART_PIN_TX);
#endif
#if defined(DBG_USART_PIN_RX)
ioport_set_pin_mode(DBG_USART_PIN_RX, DBG_USART_PIN_TX_MUX);
ioport_disable_pin(DBG_USART_PIN_RX);
#endif
}
/**
* \brief Reset AT24CXX.
*
* Send 9 clock cycles to reset memory state.
*
* \note IO mode is used in this function, so it can be used even if TWI is not
* enabled.
*/
void at24cxx_reset(void)
{
uint32_t i;
/* MEM reset
* a) Clock up to 9 cycles (use 100K)
* b) look for SDA high in each cycle while SCL is high and then
* c) Create a start condition as SDA is high
*/
/* - Enable pin output mode */
ioport_set_pin_dir(BOARD_CLK_TWI_EEPROM, IOPORT_DIR_OUTPUT);
ioport_set_pin_level(BOARD_CLK_TWI_EEPROM, 1);
ioport_enable_pin(BOARD_CLK_TWI_EEPROM);
for (i = 0; i < 10; i ++) {
delay_us(5);
ioport_set_pin_level(BOARD_CLK_TWI_EEPROM, 0);
delay_us(5);
ioport_set_pin_level(BOARD_CLK_TWI_EEPROM, 1);
}
/* - Restore pin peripheral mode */
ioport_set_pin_mode(BOARD_CLK_TWI_EEPROM, BOARD_CLK_TWI_MUX_EEPROM);
ioport_disable_pin(BOARD_CLK_TWI_EEPROM);
/* - Start condition will do on R/W start */
}
OSStatus platform_gpio_init( const platform_gpio_t* gpio, platform_pin_config_t config )
{
ioport_mode_t mode;
enum ioport_direction direction;
OSStatus err = kNoErr;
platform_mcu_powersave_disable();
require_action_quiet( gpio != NULL, exit, err = kParamErr);
switch ( config )
{
case INPUT_PULL_UP:
{
direction = IOPORT_DIR_INPUT;
mode = IOPORT_MODE_PULLUP;
break;
}
case INPUT_PULL_DOWN:
{
direction = IOPORT_DIR_INPUT;
mode = IOPORT_MODE_PULLDOWN;
break;
}
case INPUT_HIGH_IMPEDANCE:
{
direction = IOPORT_DIR_INPUT;
mode = 0;
break;
}
case OUTPUT_PUSH_PULL:
{
direction = IOPORT_DIR_OUTPUT;
mode = 0;
break;
}
case OUTPUT_OPEN_DRAIN_NO_PULL:
{
direction = IOPORT_DIR_OUTPUT;
mode = IOPORT_MODE_OPEN_DRAIN;
break;
}
case OUTPUT_OPEN_DRAIN_PULL_UP:
{
direction = IOPORT_DIR_OUTPUT;
mode = IOPORT_MODE_OPEN_DRAIN | IOPORT_MODE_PULLUP;
break;
}
default:
{
err = kParamErr;
goto exit;
}
}
ioport_enable_pin ( gpio->pin );
ioport_set_pin_mode( gpio->pin, mode );
ioport_set_pin_dir ( gpio->pin, direction );
exit:
platform_mcu_powersave_enable();
return err;
}
void Gpio::init(ioport_direction dir) {
ioport_enable_pin(_pin);
ioport_set_pin_dir(_pin, dir);
}