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More work on GPIO reset for the RaspberryPi.

This commit is contained in:
David Betz 2015-01-27 17:06:44 -05:00
parent 6292d3a2e7
commit f6173c5bdc
2 changed files with 34 additions and 7 deletions
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39
osint_linux.c
View File

@ -46,7 +46,6 @@
#include "osint.h"
#ifdef RASPBERRY_PI
#include "gpio_sysfs.h"
#define GPIO_PIN 17
#endif
typedef int HANDLE;
@ -54,6 +53,11 @@ static HANDLE hSerial = -1;
static struct termios old_sparm;
static int continue_terminal = 1;
#ifdef RASPBERRY_PI
static propellerResetGpioPin = 17;
static propellerResetGpioLevel = 1;
#endif
/* Normally we use DTR for reset */
static reset_method_t reset_method = RESET_WITH_DTR;
@ -67,9 +71,32 @@ int use_reset_method(char* method)
else if (strcasecmp(method, "gpio") == 0)
{
reset_method = RESET_WITH_GPIO;
gpio_export(GPIO_PIN);
gpio_write(GPIO_PIN, 0);
gpio_direction(GPIO_PIN, 1);
char *token;
token = strtok(method, ",");
token = strtok(NULL, ",");
if (token)
{
propellerResetGpioPin = atoi(token);
}
token = strtok(NULL, ",");
if (token)
{
propellerResetGpioLevel = atoi(token);
}
printf ("Using GPIO pin %d as Propeller reset ", propellerResetGpioPin);
if (propellerResetGpioLevel)
{
printf ("(HIGH).\n");
}
else
{
printf ("(LOW).\n");
}
gpio_export(propellerResetGpioPin);
gpio_write(propellerResetGpioPin, propellerResetGpioLevel ^ 1);
gpio_direction(propellerResetGpioPin, 1);
}
#endif
else {
@ -385,7 +412,7 @@ static void assert_reset(void)
break;
#ifdef RASPBERRY_PI
case RESET_WITH_GPIO:
gpio_write(GPIO_PIN, 1);
gpio_write(propellerResetGpioPin, propellerResetGpioLevel);
break;
#endif
default:
@ -414,7 +441,7 @@ static void deassert_reset(void)
break;
#ifdef RASPBERRY_PI
case RESET_WITH_GPIO:
gpio_write(GPIO_PIN, 0);
gpio_write(propellerResetGpioPin, propellerResetGpioLevel ^ 1);
break;
#endif
default:

2
p1load.c
View File

@ -157,7 +157,7 @@ int main(int argc, char *argv[])
}
#ifdef RASPBERRY_PI
use_reset_method("gpio");
use_reset_method("gpio,17,0");
#endif
switch (InitPort(PORT_PREFIX, port, baudRate, verbose, actualPort)) {