void hd64465_gpio_configure(int portpin, int direction)
{
unsigned short cr;
unsigned int shift = (_PINOF(portpin)<<1);
cr = inw(GPIO_CR(_PORTOF(portpin)));
cr &= ~(3<<shift);
cr |= direction<<shift;
outw(cr, GPIO_CR(_PORTOF(portpin)));
}
/*
* GPIO setup:
* Enable the pins driving the RGB LED as outputs.
*/
static void gpio_setup(void)
{
/*
* Configure GPIOF
* This port is used to control the RGB LED
*/
periph_clock_enable(RCC_GPIOF);
const u32 outpins = (LED_R | LED_G | LED_B);
GPIO_DIR(RGB_PORT) |= outpins; /* Configure outputs. */
GPIO_DEN(RGB_PORT) |= outpins; /* Enable digital function on outputs. */
/*
* Now take care of our buttons
*/
const u32 btnpins = USR_SW1 | USR_SW2;
/*
* PF0 is locked by default. We need to unlock the GPIO_CR register,
* then enable PF0 commit. After we do this, we can setup PF0. If we
* don't do this, any configuration done to PF0 is lost, and we will not
* have a PF0 interrupt.
*/
GPIO_LOCK(GPIOF) = 0x4C4F434B;
GPIO_CR(GPIOF) |= USR_SW2;
/* Configure pins as inputs. */
GPIO_DIR(GPIOF) &= ~btnpins;
/* Enable digital function on the pins. */
GPIO_DEN(GPIOF) |= btnpins;
/* Pull-up the pins. We don't have an external pull-up */
GPIO_PUR(GPIOF) |= btnpins;
}
/**
* \brief Unlock the commit control of a special function pin
*
* Unlocks the commit control of the given pin or group of pins. If a pin is a
* JTAG/SWD or NMI, the pin may then be reconfigured as a GPIO pin. If the pin
* is not locked by default, this has no effect.
*
* @param[in] gpioport GPIO block register address base @ref gpio_reg_base
* @param[in] gpios @ref gpio_pin_id. Any combination of pins may be specified
* by OR'ing then together.
*/
void gpio_unlock_commit(uint32_t gpioport, uint8_t gpios)
{
/* Unlock the GPIO_CR register */
GPIO_LOCK(gpioport) = GPIO_LOCK_UNLOCK_CODE;
/* Enable committing changes */
GPIO_CR(gpioport) |= gpios;
/* Lock the GPIO_CR register */
GPIO_LOCK(gpioport) = ~GPIO_LOCK_UNLOCK_CODE;
}
void setupUSB (void) {
#ifdef HAS_MAPLE_HARDWARE
/* Setup USB DISC pin as output open drain */
SET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC),(GET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC)) & crMask(USB_DISC)) | CR_OUTPUT_OD << CR_SHITF(LED_PIN));
gpio_write_bit(USB_DISC_BANK,USB_DISC,1);
/* turn on the USB clock */
//pRCC->APB1ENR |= RCC_APB1ENR_USB_CLK;// done in setupCLK()
gpio_write_bit(USB_DISC_BANK,USB_DISC,0); /* present ourselves to the host */
#else
/* Generic boards don't have disconnect hardware, so we drive PA12 which is connected to the usb D+ line*/
#define USB_DISC_BANK GPIOA
#define USB_DISC 12
SET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC),
(GET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC)) & crMask(USB_DISC)) | CR_OUTPUT_PP << CR_SHITF(USB_DISC));
gpio_write_bit(USB_DISC_BANK,USB_DISC,0); /* present ourselves to the host */
volatile unsigned int delay;
for(delay = 0;delay<256;delay++);
// volatile unsigned x = 1024; do { ; }while(--x);// wait a moment
/* turn on the USB clock */
SET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC),
(GET_REG(GPIO_CR(USB_DISC_BANK,USB_DISC)) & crMask(USB_DISC)) | CR_INPUT << CR_SHITF(USB_DISC)); //Sets the PA12 as floating input
// pRCC->APB1ENR |= RCC_APB1ENR_USB_CLK;
#endif
/* initialize the usb application */
wTransferSize=getFlashPageSize();
u8_usbConfigDescriptorDFU[41]=(wTransferSize & 0x00FF);
u8_usbConfigDescriptorDFU[42]=(wTransferSize & 0xFF00)>>8;
u8_usbFunctionalDescriptor[5]=(wTransferSize & 0x00FF);
u8_usbFunctionalDescriptor[6]=(wTransferSize & 0xFF00)>>8;
usbAppInit();
}
