diff options
Diffstat (limited to 'firmware/drivers/GPIO.c')
| -rw-r--r-- | firmware/drivers/GPIO.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/firmware/drivers/GPIO.c b/firmware/drivers/GPIO.c new file mode 100644 index 0000000..f89b038 --- /dev/null +++ b/firmware/drivers/GPIO.c @@ -0,0 +1,171 @@ +#include <LPC17xx.h>
+
+//#include "lpc_types.h"
+#define FALSE 0
+#define TRUE 1
+
+#include "GPIO.h"
+
+static LPC_GPIO_TypeDef (* const LPC_GPIO[5]) = { LPC_GPIO0, LPC_GPIO1, LPC_GPIO2, LPC_GPIO3, LPC_GPIO4 };
+
+
+void GPIOSetValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal )
+{
+ if (bitVal == 0)
+ {
+ LPC_GPIO[portNum]->FIOCLR = (1<<bitPosi);
+ }
+ else if (bitVal >= 1)
+ {
+ LPC_GPIO[portNum]->FIOSET = (1<<bitPosi);
+ }
+}
+
+void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir )
+{
+ if(dir)
+ LPC_GPIO[portNum]->FIODIR |= 1<<bitPosi;
+ else
+ LPC_GPIO[portNum]->FIODIR &= ~(1<<bitPosi);
+}
+
+void GPIOSetPull( uint32_t portNum, uint32_t bitPosi, uint32_t dir)
+{
+
+ if (dir == 0) { //no Pull
+ dir = 10;
+ } else if(dir == 1){ //Pull up
+ dir = 00;
+ } else if(dir == 2){ //Pull down
+ dir = 11;
+ }
+
+ switch (portNum)
+ {
+ case 0:
+
+ if (bitPosi < 16 ) {
+ bitPosi = bitPosi * 2;
+ LPC_PINCON->PINMODE0 |= dir<<bitPosi;
+ } else if (bitPosi > 15){
+ bitPosi = bitPosi - 16;
+ bitPosi = bitPosi * 2;
+ LPC_PINCON->PINMODE1 |= dir<<bitPosi;
+ }
+
+ break;
+
+ case 1:
+
+ if (bitPosi < 16 ) {
+ bitPosi = bitPosi * 2;
+ LPC_PINCON->PINMODE2 |= dir<<bitPosi;
+ } else if (bitPosi > 15){
+ bitPosi = bitPosi - 16;
+ bitPosi = bitPosi * 2;
+ LPC_PINCON->PINMODE3 |= dir<<bitPosi;
+ }
+
+ break;
+
+ case 2:
+
+ if (bitPosi < 14 ) {
+ bitPosi = bitPosi * 2;
+ LPC_PINCON->PINMODE4 |= dir<<bitPosi;
+ }
+
+ break;
+
+ case 3:
+
+ if (bitPosi == 25){
+ LPC_PINCON->PINMODE7 |= dir<<18;
+ }else if (bitPosi == 26){
+ LPC_PINCON->PINMODE7 |= dir<<20;
+ }
+
+ break;
+
+ case 4:
+ if (bitPosi == 28){
+ LPC_PINCON->PINMODE9 |= dir<<24;
+ }else if (bitPosi == 29){
+ LPC_PINCON->PINMODE9 |= dir<<26;
+ }
+
+ }
+}
+
+uint32_t GPIOGetValue (uint32_t portNum, uint32_t bitPosi)
+{
+ uint32_t val;
+ LPC_GPIO[portNum]->FIOMASK = ~(1<<bitPosi);
+ val = LPC_GPIO[portNum]->FIOPIN;
+ val = val >> bitPosi;
+ LPC_GPIO[portNum]->FIOMASK = 0x00000000;
+ return val;
+}
+
+void GPIOSetInterrupt ( uint32_t portNum, uint32_t bitPosi, uint32_t dir )
+{
+ // Dir is 0 for falling edge interrupt and 1 for rising edge interrupt
+ if (portNum == 0)
+ {
+ if (dir == 0)
+ {
+ LPC_GPIOINT->IO0IntEnF |= (1<<bitPosi);
+ }
+ else if (dir == 1)
+ {
+ LPC_GPIOINT->IO0IntEnR |= (1<<bitPosi);
+ }
+ }
+ else if (portNum == 2)
+ {
+ if (dir == 0)
+ {
+ LPC_GPIOINT->IO2IntEnF |= (1<<bitPosi);
+ }
+ else if (dir == 1)
+ {
+ LPC_GPIOINT->IO2IntEnR |= (1<<bitPosi);
+ }
+ }
+
+ NVIC_EnableIRQ(EINT3_IRQn);
+}
+
+void GPIOClearInterrupt( void )
+{
+ LPC_GPIOINT->IO0IntClr = 0x7FFF8FFF;
+ LPC_GPIOINT->IO2IntClr = 0x3fff;
+}
+
+uint32_t GPIOCheckInterrupts ( uint32_t portNum, uint32_t dir)
+{
+ // Dir is 0 for falling edge interrupt and 1 for rising edge interrupt
+ if (portNum == 0)
+ {
+ if (dir == 0)
+ {
+ return LPC_GPIOINT->IO0IntStatF;
+ }
+ else if (dir == 1)
+ {
+ return LPC_GPIOINT->IO0IntStatR;
+ }
+ }
+ else if (portNum == 2)
+ {
+ if (dir == 0)
+ {
+ return LPC_GPIOINT->IO0IntStatF;
+ }
+ else if (dir == 1)
+ {
+ return LPC_GPIOINT->IO0IntStatR;
+ }
+ }
+ return FALSE;
+}
|