void gpio_disable_pin(unsigned int pin)
{
LPC_GPIO->DIR[GPIO_PORT(pin)] &= ~(1 << GPIO_PIN(pin));
disable_pin(PIN_RAW(pin));
}
void setup_gpio(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//enable the clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);//GPIO/AFIO clks
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;//pulldown
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
//Pull down all four lines to the microSD card during bootup + the si446x
GPIO_InitStructure.GPIO_Pin = (GPIO_Pin_8 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15 | SI_PORTB);
GPIO_Init( GPIOB, &GPIO_InitStructure );
GPIO_InitStructure.GPIO_Pin = (SI_PORTA);
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_WriteBit(GPIOB,GPIO_Pin_5,Bit_RESET);//Then ensure that this is low to power cycle the secondary supply in case of a reset
setuppwr(); //configure power control
disable_pin(); //disable WKUP pin functionality
//Disable the JTAG so we can use pins as GPIO - SWD still usable
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
//Configure and read the PortB2 pin - this has a pullup to V_USB, so if it reads 1 we booted off usb so setup USB detatch isr
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init( GPIOB, &GPIO_InitStructure );/* configure pin 2 as input*/
for(uint16_t n=1;n;n++) { //USB insertion can be really messy, so loop to detect anything on chrg pin over a few milliseconds
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_2)) {//We booted from USB
bootsource=USB_SOURCE; //so we know for reference later
n=0;
break;
}
}
//Configure the io pins
//Pull up all the SD pins before card init
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//pullup
//Pull up all the SD SPI lines until the bus is intialized - SD spec says MISO and MOSI should be pulled up at poweron
GPIO_Init( GPIOB, &GPIO_InitStructure );/* configure SDSEL pin as input pull up until the SD driver is intialised*/
//Power button
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
if(USB_SOURCE==bootsource) //Configure for turnoff on usb removal or pwr button
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//pullup
else
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;//pulldown
GPIO_Init( GPIOA, &GPIO_InitStructure );/* configure WKUP pin as input pull down/up for button*/
//Power supply enable
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//pushpull
GPIO_Init( GPIOB, &GPIO_InitStructure );
GPIO_WriteBit(GPIOB,GPIO_Pin_5,Bit_SET); //Make sure power enabled
//Configure the ADC inputs, PortA/B.1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_Init( GPIOB, &GPIO_InitStructure );
//Configure the PWM output - in timer function
//Configure the Cutdown and Inductor enable pins
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;//Cutdown is first - PortA.15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_WriteBit(GPIOA,GPIO_Pin_15,Bit_SET);//Make sure CUT disabled (note its inverted due to driver)
//Configure Inductor enable pin
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init( GPIOB, &GPIO_InitStructure );
GPIO_WriteBit(GPIOB,GPIO_Pin_12,Bit_RESET);//Make sure Igntion off
GPIO_Init( GPIOB, &GPIO_InitStructure );
//Configure GoPro trigger pin
GPIO_WriteBit(GPIOB,GPIO_Pin_4,Bit_RESET);//Make sure GoPro off
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_Init( GPIOB, &GPIO_InitStructure );
GPIO_WriteBit(GPIOB,GPIO_Pin_4,Bit_RESET);//Make sure GoPro off
}
