/*---------------------------------------------------------------------------*/
void
board_i2c_shutdown()
{
interface = NO_INTERFACE;
if(accessible()) {
ti_lib_i2c_master_disable(I2C0_BASE);
}
ti_lib_prcm_peripheral_run_disable(PRCM_PERIPH_I2C0);
ti_lib_prcm_load_set();
while(!ti_lib_prcm_load_get());
/*
* Set all pins to GPIO Input and disable the output driver. Set internal
* pull to match external pull
*
* SDA and SCL: external PU resistor
* SDA HP and SCL HP: MPU PWR low
*/
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SDA_HP);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SDA_HP, IOC_IOPULL_DOWN);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SCL_HP);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SCL_HP, IOC_IOPULL_DOWN);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SDA);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SDA, IOC_IOPULL_UP);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SCL);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SCL, IOC_IOPULL_UP);
}
/*---------------------------------------------------------------------------*/
void
board_i2c_select(uint8_t new_interface, uint8_t address)
{
slave_addr = address;
if(accessible() == false) {
board_i2c_wakeup();
}
if(new_interface != interface) {
interface = new_interface;
ti_lib_i2c_master_disable(I2C0_BASE);
if(interface == BOARD_I2C_INTERFACE_0) {
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SDA, IOC_NO_IOPULL);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SCL, IOC_NO_IOPULL);
ti_lib_ioc_pin_type_i2c(I2C0_BASE, BOARD_IOID_SDA, BOARD_IOID_SCL);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SDA_HP);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SCL_HP);
} else if(interface == BOARD_I2C_INTERFACE_1) {
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SDA_HP, IOC_NO_IOPULL);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_SCL_HP, IOC_NO_IOPULL);
ti_lib_ioc_pin_type_i2c(I2C0_BASE, BOARD_IOID_SDA_HP, BOARD_IOID_SCL_HP);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SDA);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SCL);
}
/* Enable and initialize the I2C master module */
ti_lib_i2c_master_init_exp_clk(I2C0_BASE, ti_lib_sys_ctrl_clock_get(),
true);
}
}
uint_least8_t ADS7846_rd_spi(void)
{
#if defined(SOFTWARE_SPI)
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SPI_MOSI);
uint_least8_t data = 0;
MOSI_LOW();
for (uint_least8_t bit = 8; bit != 0; bit--) {
ADS7846_delay_ms(1);
SCK_HIGH();
ADS7846_delay_ms(1);
data <<= 1;
if (MISO_READ()) {
data |= 1;
} else {
//data |= 0;
}
SCK_LOW();
}
return data;
#else
return SPI.transfer(0x00);
#endif
}
/*---------------------------------------------------------------------------*/
static void
configure_unused_pins(void)
{
/* Turn off 3.3-V domain (lcd/sdcard power, output low) */
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_3V3_EN);
ti_lib_gpio_pin_write(BOARD_3V3_EN, 0);
/* Accelerometer (PWR output low, CSn output, high) */
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_ACC_PWR);
ti_lib_gpio_pin_write(BOARD_ACC_PWR, 0);
/* Ambient light sensor (off, output low) */
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_ALS_PWR);
ti_lib_gpio_pin_write(BOARD_ALS_PWR, 0);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_ALS_OUT);
ti_lib_ioc_io_port_pull_set(BOARD_IOID_ALS_OUT, IOC_NO_IOPULL);
}
/*---------------------------------------------------------------------------*/
static void
configure_unused_pins(void)
{
uint32_t pins[] = {
BOARD_IOID_CS, BOARD_IOID_TDO, BOARD_IOID_TDI, BOARD_IOID_DIO12,
BOARD_IOID_DIO15, BOARD_IOID_DIO21, BOARD_IOID_DIO22, BOARD_IOID_DIO23,
BOARD_IOID_DIO24, BOARD_IOID_DIO25, BOARD_IOID_DIO26, BOARD_IOID_DIO27,
BOARD_IOID_DIO28, BOARD_IOID_DIO29, BOARD_IOID_DIO30,
IOID_UNUSED
};
uint32_t *pin;
for(pin = pins; *pin != IOID_UNUSED; pin++) {
ti_lib_ioc_pin_type_gpio_input(*pin);
ti_lib_ioc_io_port_pull_set(*pin, IOC_IOPULL_DOWN);
}
}
void ADS7846_begin(void)
{
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_TOUCH_CS);
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_SPI_MOSI);
ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_SPI_SCK);
ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_SPI_MISO);
CS_DISABLE();
#ifdef IRQ_PIN
pinMode(IRQ_PIN, INPUT);
digitalWrite(IRQ_PIN, HIGH); //pull-up
#endif
#ifdef BUSY_PIN
pinMode(BUSY_PIN, INPUT);
digitalWrite(BUSY_PIN, HIGH); //pull-up
#endif
#if !defined(SOFTWARE_SPI)
SPI.setDataMode(SPI_MODE0);
SPI.begin();
#endif
//set vars
tp_matrix.div = 0;
tp_x = 0;
tp_y = 0;
tp_last_x = 0;
tp_last_y = 0;
lcd_x = 0;
lcd_y = 0;
pressure = 0;
ADS7846_setOrientation(0);
return;
}
