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/* Stellaris EKB-LM4F-EAC pins multiplexing */
#include "board.h"
#include "registers.h"
#include "util.h"
void configure_board(void)
{
/* Enable all of the GPIO modules : GPIOA to GPIOQ */
LM4_SYSTEM_RCGCGPIO = 0x7fff;
/* GPIOA muxing :
* pins 0/1 : UART0 = function 1
* pins 2/3/4/5 : SSI0 = function 2
* pin 6 : GPIO = function 0 (SD card CS -- open drain)
* pin 7 : GPIO = function 0 (user LED)
*/
LM4_GPIO_PCTL(A) = 0x00222211;
LM4_GPIO_AFSEL(A) = 0x3f;
LM4_GPIO_DEN(A) = 0xff;
LM4_GPIO_PDR(A) = 0x00;
LM4_GPIO_PUR(A) = 0x3c;
LM4_GPIO_DIR(A) = 0xc0;
LM4_GPIO_ODR(A) = 0x40;
LM4_GPIO_DR2R(A) = 0xc3;
LM4_GPIO_DR8R(A) = 0x3c;
LM4_GPIO_DATA_BITS(A, 0x100) = 0x40;
LM4_GPIO_DATA_BITS(A, 0x200) = 0;
/* GPIOB muxing
* pin 0 : GPIO = function 0 (USB ID)
* pin 1 : USB digital (VBus sense)
*/
LM4_GPIO_DEN(B) |= 0x01;
LM4_GPIO_AFSEL(B)|= 0x01;
/* GPIOC muxing
* pins 0/1/2/3 : JTAG (default config)
* pin 4 : GPIO = function 0 (OLED +15v power enable)
* pin 6 : USB digital (USB power enable)
* pin 7 : USB digital (USB current overflow)
*/
LM4_GPIO_PCTL(C) = 0x88001111;
LM4_GPIO_AFSEL(C) = 0xcf;
LM4_GPIO_DEN(C) = 0xdf;
LM4_GPIO_DIR(C) = 0x10;
LM4_GPIO_DATA_BITS(C, 0x40) = 0;
/* GPIOD muxing
* pins 0/1/2/3/4 : GPIO = function 0 (buttons up,down,left,right,select)
* pin 5 : GPIO = function 0 (OLED d/Cn)
* pin 6 : GPIO = function 0 (OLED reset)
*/
LM4_GPIO_DEN(D) = 0x7f;
LM4_GPIO_DIR(D) = 0x60;
LM4_GPIO_PUR(D) = 0x1f;
/* GPIOE muxing
* pin 3 : Analog function : AIN0 ADC (potentiometer)
* pin 6/7: USB analog
*/
LM4_GPIO_AMSEL(E) = 0x8;
}
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