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Beginnings for specialized GPIO on mbed.

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This commit is contained in:
James Snyder 2010-02-12 23:03:13 +00:00
parent cd6fff2696
commit d297274a40
1 changed files with 48 additions and 0 deletions
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48
src/platform/lpc17xx/platform.c
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@ -23,6 +23,9 @@
#include "lpc17xx_timer.h"
#include "lpc17xx_clkpwr.h"
// mbed-specific includes
#include "PinNames.h"
// ****************************************************************************
// Platform initialization
@ -66,6 +69,51 @@ int platform_init()
// ****************************************************************************
// PIO section
u32 pin_ports = {0,0,0,0,0,0,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,1 ,1 ,2,2,2,2,2,2,0 ,0,0, // mbed p5 - p30
1 ,1 ,1 ,1 ,0,0}; // mbed LED1-4, USBTX, USBRX
u32 pin_nums = {9,8,7,6,0,1,18,17,15,16,23,24,25,26,30,31,5,4,3,2,1,0,11,5,4,
18,20,21,23,2,3};
inline PinName parse_pins(const char *str) {
const PinName pin_names[] = {p5, p6, p7, p8, p9, p10, p11, p12, p13, p14
, p15, p16, p17, p18, p19, p20, p21, p22, p23
, p24, p25, p26, p27, p28, p29, p30};
if(str[0] == 'P') { // Pn_n
uint32_t port = str[1] - '0';
uint32_t pin = str[3] - '0'; // Pn_n
uint32_t pin2 = str[4] - '0'; // Pn_nn
if(pin2 <= 9) {
pin = pin * 10 + pin2;
}
return (PinName)(LPC_GPIO0_BASE + port * 32 + pin);
} else if(str[0] == 'p') { // pn
uint32_t pin = str[1] - '0'; // pn
uint32_t pin2 = str[2] - '0'; // pnn
if(pin2 <= 9) {
pin = pin * 10 + pin2;
}
if(pin < 5 || pin > 30) {
return NC;
}
return pin_names[pin - 5];
} else if(str[0] == 'L') { // LEDn
switch(str[3]) {
case '1' : return LED1;
case '2' : return LED2;
case '3' : return LED3;
case '4' : return LED4;
}
} else if(str[0] == 'U') { // USB?X
switch(str[3]) {
case 'T' : return USBTX;
case 'R' : return USBRX;
}
}
return NC;
}
// The platform I/O functions
pio_type platform_pio_op( unsigned port, pio_type pinmask, int op )