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* updated port apis with corrections.

pull/1297/head
akhilpanayam 2015-07-28 19:49:36 +05:30 committed by Karthik Purushothaman
parent 0ee229aa90
commit c7573e43ce
1 changed files with 46 additions and 44 deletions
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90
libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM0/port_api.c
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@ -22,21 +22,12 @@
#define PORTB_MASK 0xC0C3C30D // mask for available pins in Port B
#define PORTC_MASK 0x000D0000 // mask for available pins in Port C
#define PORTA_START 0 // 32 pins in a port
#define PORTB_START 32
#define PORTC_START 64
uint32_t start_pin(PortName port)
{
switch (port) {
case PortA:
return PORTA_START;
case PortB:
return PORTB_START;
case PortC:
return PORTC_START;
default:
return NC;
if(port <= 2) { /* PortC value is 2*/
return port * 32;
} else {
return NC;
}
}
void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
@ -46,26 +37,7 @@ void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
int i, j;
int start;
PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(port * 32); // 32 pins in port // function reused to get the port base
switch (port) {
case PortA:
obj->mask = (uint32_t)mask & PORTA_MASK;
break;
case PortB:
obj->mask = (uint32_t)mask & PORTB_MASK;
break;
case PortC:
obj->mask = (uint32_t)mask & PORTC_MASK;
break;
}
start = start_pin(port);
if(start == NC)
return;
obj->port = port;
obj->direction = dir;
port_get_config_defaults(&pin_conf);
obj->powersave = pin_conf.powersave;
obj->mode = PORT_PIN_PULL_UP;
switch (dir) {
case PIN_INPUT :
pin_conf.direction = PORT_PIN_DIR_INPUT;
@ -76,8 +48,34 @@ void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
case PIN_INPUT_OUTPUT:
pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
break;
default:
return;
}
for (i = start, j = 0; i < (start + 32); i++, j++) {
PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(port * 32); // 32 pins in port // function reused to get the port base
if(port_base == NULL) return; /* returns NULL if invalid*/
switch (port) {
case PortA:
obj->mask = (uint32_t)mask & PORTA_MASK;
break;
case PortB:
obj->mask = (uint32_t)mask & PORTB_MASK;
break;
case PortC:
obj->mask = (uint32_t)mask & PORTC_MASK;
break;
default:
return;
}
start = start_pin(port);
if(start == NC)
return;
obj->port = port;
obj->direction = dir;
obj->powersave = pin_conf.powersave;
obj->mode = PORT_PIN_PULL_UP;
for (i = start, j = 0; j < 32; i++, j++) {
if (obj->mask & (1<<j)) {
port_pin_set_config((PinName)i, &pin_conf);
}
@ -96,7 +94,7 @@ void port_mode(port_t *obj, PinMode mode)
start = start_pin(obj->port);
if(start == NC)
return;
for (i = start, j = 0; i < (start + 32); i++, j++) {
for (i = start, j = 0; j < 32; i++, j++) {
if (obj->mask & (1<<j)) {
pin_mode((PinName)i , mode);
}
@ -109,12 +107,7 @@ void port_dir(port_t *obj, PinDirection dir)
struct port_config pin_conf;
int i, j;
int start;
start = start_pin(obj->port);
if(start == NC)
return;
obj->direction = dir;
pin_conf.input_pull = obj->mode;
pin_conf.powersave = obj->powersave;
switch (dir) {
case PIN_INPUT :
pin_conf.direction = PORT_PIN_DIR_INPUT;
@ -125,8 +118,17 @@ void port_dir(port_t *obj, PinDirection dir)
case PIN_INPUT_OUTPUT:
pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
break;
default:
return;
}
for (i = start, j = 0; i < (start + 32); i++, j++) {
start = start_pin(obj->port);
if(start == NC)
return;
obj->direction = dir;
pin_conf.input_pull = obj->mode;
pin_conf.powersave = obj->powersave;
for (i = start, j = 0; j < 32; i++, j++) {
if (obj->mask & (1<<j)) {
port_pin_set_config((PinName)i, &pin_conf);
}
@ -155,9 +157,9 @@ void port_write(port_t *obj, int value)
int port_read(port_t *obj)
{
MBED_ASSERT(obj);
if (obj->direction == PIN_INPUT) {
return (*obj->IN & obj->mask);
} else {
if (obj->direction == PIN_OUTPUT) {
return (*obj->OUT & obj->mask);
} else {
return (*obj->IN & obj->mask);
}
}